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levibostian/ActionBarDrawerToggleHoneycomb.java

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**Don't delete me. Public shared.** Android navigation drawer animation duration.Blog post: levibostian.com/blog/android-navigation-drawer-animation-duration/index.html*Note:* Does not include all files required to start app. Only files that require editing as discussed in blog post.
Raw
ActionBarDrawerToggleHoneycomb.java
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.levibostian.customdurationnavigationdrawer.app;
import android.app.ActionBar;
import android.app.Activity;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import com.levibostian.customdurationnavigationdrawer.R;
import java.lang.reflect.Method;
public class ActionBarDrawerToggleHoneycomb {
private static final String TAG = "ActionBarDrawerToggleHoneycomb";
private static final int[] THEME_ATTRS = new int[] {
R.attr.homeAsUpIndicator
};
public static Object setActionBarUpIndicator(Object info, Activity activity,
Drawable drawable, int contentDescRes) {
if (info == null) {
info = new SetIndicatorInfo(activity);
}
final SetIndicatorInfo sii = (SetIndicatorInfo) info;
if (sii.setHomeAsUpIndicator != null) {
try {
final ActionBar actionBar = activity.getActionBar();
sii.setHomeAsUpIndicator.invoke(actionBar, drawable);
sii.setHomeActionContentDescription.invoke(actionBar, contentDescRes);
} catch (Exception e) {
Log.w(TAG, "Couldn't set home-as-up indicator via JB-MR2 API", e);
}
} else if (sii.upIndicatorView != null) {
sii.upIndicatorView.setImageDrawable(drawable);
} else {
Log.w(TAG, "Couldn't set home-as-up indicator");
}
return info;
}
public static Object setActionBarDescription(Object info, Activity activity,
int contentDescRes) {
if (info == null) {
info = new SetIndicatorInfo(activity);
}
final SetIndicatorInfo sii = (SetIndicatorInfo) info;
if (sii.setHomeAsUpIndicator != null) {
try {
final ActionBar actionBar = activity.getActionBar();
sii.setHomeActionContentDescription.invoke(actionBar, contentDescRes);
} catch (Exception e) {
Log.w(TAG, "Couldn't set content description via JB-MR2 API", e);
}
}
return info;
}
public static Drawable getThemeUpIndicator(Activity activity) {
final TypedArray a = activity.obtainStyledAttributes(THEME_ATTRS);
final Drawable result = a.getDrawable(0);
a.recycle();
return result;
}
private static class SetIndicatorInfo {
public Method setHomeAsUpIndicator;
public Method setHomeActionContentDescription;
public ImageView upIndicatorView;
SetIndicatorInfo(Activity activity) {
try {
setHomeAsUpIndicator = ActionBar.class.getDeclaredMethod("setHomeAsUpIndicator",
Drawable.class);
setHomeActionContentDescription = ActionBar.class.getDeclaredMethod(
"setHomeActionContentDescription", Integer.TYPE);
// If we got the method we won't need the stuff below.
return;
} catch (NoSuchMethodException e) {
// Oh well. We'll use the other mechanism below instead.
}
final View home = activity.findViewById(android.R.id.home);
if (home == null) {
// Action bar doesn't have a known configuration, an OEM messed with things.
return;
}
final ViewGroup parent = (ViewGroup) home.getParent();
final int childCount = parent.getChildCount();
if (childCount != 2) {
// No idea which one will be the right one, an OEM messed with things.
return;
}
final View first = parent.getChildAt(0);
final View second = parent.getChildAt(1);
final View up = first.getId() == android.R.id.home ? second : first;
if (up instanceof ImageView) {
// Jackpot! (Probably...)
upIndicatorView = (ImageView) up;
}
}
}
}
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ActionBarDrawerToggleJellybeanMR2.java
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.levibostian.customdurationnavigationdrawer.app;
import android.app.ActionBar;
import android.app.Activity;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import com.levibostian.customdurationnavigationdrawer.R;
public class ActionBarDrawerToggleJellybeanMR2 {
private static final String TAG = "ActionBarDrawerToggleImplJellybeanMR2";
private static final int[] THEME_ATTRS = new int[] {
R.attr.homeAsUpIndicator
};
public static Object setActionBarUpIndicator(Object info, Activity activity,
Drawable drawable, int contentDescRes) {
final ActionBar actionBar = activity.getActionBar();
if (actionBar != null) {
actionBar.setHomeAsUpIndicator(drawable);
actionBar.setHomeActionContentDescription(contentDescRes);
}
return info;
}
public static Object setActionBarDescription(Object info, Activity activity,
int contentDescRes) {
final ActionBar actionBar = activity.getActionBar();
if (actionBar != null) {
actionBar.setHomeActionContentDescription(contentDescRes);
}
return info;
}
public static Drawable getThemeUpIndicator(Activity activity) {
final TypedArray a = activity.obtainStyledAttributes(THEME_ATTRS);
final Drawable result = a.getDrawable(0);
a.recycle();
return result;
}
}
Raw
CustomDurationActionBarDrawerToggle.java
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.levibostian.customdurationnavigationdrawer.app;
import android.app.Activity;
import android.content.res.Configuration;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.InsetDrawable;
import android.os.Build;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.MenuItem;
import android.view.View;
import com.levibostian.customdurationnavigationdrawer.widget.CustomDurationDrawerLayout;
public class CustomDurationActionBarDrawerToggle implements CustomDurationDrawerLayout.DrawerListener {
/**
* Allows an implementing Activity to return an {@link ActionBarDrawerToggle.Delegate} to use
* with ActionBarDrawerToggle.
*/
public interface DelegateProvider {
/**
* @return Delegate to use for ActionBarDrawableToggles, or null if the Activity
* does not wish to override the default behavior.
*/
Delegate getDrawerToggleDelegate();
}
public interface Delegate {
/**
* @return Up indicator drawable as defined in the Activity's theme, or null if one is not
* defined.
*/
Drawable getThemeUpIndicator();
/**
* Set the Action Bar's up indicator drawable and content description.
*
* @param upDrawable - Drawable to set as up indicator
* @param contentDescRes - Content description to set
*/
void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes);
/**
* Set the Action Bar's up indicator content description.
*
* @param contentDescRes - Content description to set
*/
void setActionBarDescription(int contentDescRes);
}
private interface ActionBarDrawerToggleImpl {
Drawable getThemeUpIndicator(Activity activity);
Object setActionBarUpIndicator(Object info, Activity activity,
Drawable themeImage, int contentDescRes);
Object setActionBarDescription(Object info, Activity activity, int contentDescRes);
}
private static class ActionBarDrawerToggleImplBase implements ActionBarDrawerToggleImpl {
@Override
public Drawable getThemeUpIndicator(Activity activity) {
return null;
}
@Override
public Object setActionBarUpIndicator(Object info, Activity activity,
Drawable themeImage, int contentDescRes) {
// No action bar to set.
return info;
}
@Override
public Object setActionBarDescription(Object info, Activity activity, int contentDescRes) {
// No action bar to set
return info;
}
}
private static class ActionBarDrawerToggleImplHC implements ActionBarDrawerToggleImpl {
@Override
public Drawable getThemeUpIndicator(Activity activity) {
return ActionBarDrawerToggleHoneycomb.getThemeUpIndicator(activity);
}
@Override
public Object setActionBarUpIndicator(Object info, Activity activity,
Drawable themeImage, int contentDescRes) {
return ActionBarDrawerToggleHoneycomb.setActionBarUpIndicator(info, activity,
themeImage, contentDescRes);
}
@Override
public Object setActionBarDescription(Object info, Activity activity, int contentDescRes) {
return ActionBarDrawerToggleHoneycomb.setActionBarDescription(info, activity,
contentDescRes);
}
}
private static class ActionBarDrawerToggleImplJellybeanMR2
implements ActionBarDrawerToggleImpl {
@Override
public Drawable getThemeUpIndicator(Activity activity) {
return ActionBarDrawerToggleJellybeanMR2.getThemeUpIndicator(activity);
}
@Override
public Object setActionBarUpIndicator(Object info, Activity activity,
Drawable themeImage, int contentDescRes) {
return ActionBarDrawerToggleJellybeanMR2.setActionBarUpIndicator(info, activity,
themeImage, contentDescRes);
}
@Override
public Object setActionBarDescription(Object info, Activity activity, int contentDescRes) {
return ActionBarDrawerToggleJellybeanMR2.setActionBarDescription(info, activity,
contentDescRes);
}
}
private static final ActionBarDrawerToggleImpl IMPL;
static {
final int version = Build.VERSION.SDK_INT;
if (version >= 18) {
IMPL = new ActionBarDrawerToggleImplJellybeanMR2();
} else if (version >= 11) {
IMPL = new ActionBarDrawerToggleImplHC();
} else {
IMPL = new ActionBarDrawerToggleImplBase();
}
}
/** Fraction of its total width by which to offset the toggle drawable. */
private static final float TOGGLE_DRAWABLE_OFFSET = 1 / 3f;
// android.R.id.home as defined by public API in v11
private static final int ID_HOME = 0x0102002c;
private final Activity mActivity;
private final Delegate mActivityImpl;
private final CustomDurationDrawerLayout mDrawerLayout;
private boolean mDrawerIndicatorEnabled = true;
private Drawable mThemeImage;
private Drawable mDrawerImage;
private SlideDrawable mSlider;
private final int mDrawerImageResource;
private final int mOpenDrawerContentDescRes;
private final int mCloseDrawerContentDescRes;
private Object mSetIndicatorInfo;
/**
* Construct a new ActionBarDrawerToggle.
*
* <p>The given {@link Activity} will be linked to the specified {@link DrawerLayout}.
* The provided drawer indicator drawable will animate slightly off-screen as the drawer
* is opened, indicating that in the open state the drawer will move off-screen when pressed
* and in the closed state the drawer will move on-screen when pressed.</p>
*
* <p>String resources must be provided to describe the open/close drawer actions for
* accessibility services.</p>
*
* @param activity The Activity hosting the drawer
* @param drawerLayout The DrawerLayout to link to the given Activity's ActionBar
* @param drawerImageRes A Drawable resource to use as the drawer indicator
* @param openDrawerContentDescRes A String resource to describe the "open drawer" action
* for accessibility
* @param closeDrawerContentDescRes A String resource to describe the "close drawer" action
* for accessibility
*/
public CustomDurationActionBarDrawerToggle(Activity activity, CustomDurationDrawerLayout drawerLayout,
int drawerImageRes, int openDrawerContentDescRes, int closeDrawerContentDescRes) {
mActivity = activity;
// Allow the Activity to provide an impl
if (activity instanceof DelegateProvider) {
mActivityImpl = ((DelegateProvider) activity).getDrawerToggleDelegate();
} else {
mActivityImpl = null;
}
mDrawerLayout = drawerLayout;
mDrawerImageResource = drawerImageRes;
mOpenDrawerContentDescRes = openDrawerContentDescRes;
mCloseDrawerContentDescRes = closeDrawerContentDescRes;
mThemeImage = getThemeUpIndicator();
mDrawerImage = activity.getResources().getDrawable(drawerImageRes);
mSlider = new SlideDrawable(mDrawerImage);
mSlider.setOffset(TOGGLE_DRAWABLE_OFFSET);
}
/**
* Synchronize the state of the drawer indicator/affordance with the linked DrawerLayout.
*
* <p>This should be called from your <code>Activity</code>'s
* {@link Activity#onPostCreate(android.os.Bundle) onPostCreate} method to synchronize after
* the DrawerLayout's instance state has been restored, and any other time when the state
* may have diverged in such a way that the ActionBarDrawerToggle was not notified.
* (For example, if you stop forwarding appropriate drawer events for a period of time.)</p>
*/
public void syncState() {
if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
mSlider.setPosition(1);
} else {
mSlider.setPosition(0);
}
if (mDrawerIndicatorEnabled) {
setActionBarUpIndicator(mSlider, mDrawerLayout.isDrawerOpen(GravityCompat.START) ?
mCloseDrawerContentDescRes : mOpenDrawerContentDescRes);
}
}
/**
* Enable or disable the drawer indicator. The indicator defaults to enabled.
*
* <p>When the indicator is disabled, the <code>ActionBar</code> will revert to displaying
* the home-as-up indicator provided by the <code>Activity</code>'s theme in the
* <code>android.R.attr.homeAsUpIndicator</code> attribute instead of the animated
* drawer glyph.</p>
*
* @param enable true to enable, false to disable
*/
public void setDrawerIndicatorEnabled(boolean enable) {
if (enable != mDrawerIndicatorEnabled) {
if (enable) {
setActionBarUpIndicator(mSlider, mDrawerLayout.isDrawerOpen(GravityCompat.START) ?
mCloseDrawerContentDescRes : mOpenDrawerContentDescRes);
} else {
setActionBarUpIndicator(mThemeImage, 0);
}
mDrawerIndicatorEnabled = enable;
}
}
/**
* @return true if the enhanced drawer indicator is enabled, false otherwise
* @see #setDrawerIndicatorEnabled(boolean)
*/
public boolean isDrawerIndicatorEnabled() {
return mDrawerIndicatorEnabled;
}
/**
* This method should always be called by your <code>Activity</code>'s
* {@link Activity#onConfigurationChanged(android.content.res.Configuration) onConfigurationChanged}
* method.
*
* @param newConfig The new configuration
*/
public void onConfigurationChanged(Configuration newConfig) {
// Reload drawables that can change with configuration
mThemeImage = getThemeUpIndicator();
mDrawerImage = mActivity.getResources().getDrawable(mDrawerImageResource);
syncState();
}
/**
* This method should be called by your <code>Activity</code>'s
* {@link Activity#onOptionsItemSelected(android.view.MenuItem) onOptionsItemSelected} method.
* If it returns true, your <code>onOptionsItemSelected</code> method should return true and
* skip further processing.
*
* @param item the MenuItem instance representing the selected menu item
* @return true if the event was handled and further processing should not occur
*/
public boolean onOptionsItemSelected(MenuItem item) {
if (item != null && item.getItemId() == ID_HOME && mDrawerIndicatorEnabled) {
if (mDrawerLayout.isDrawerVisible(GravityCompat.START)) {
mDrawerLayout.closeDrawer(GravityCompat.START);
} else {
mDrawerLayout.openDrawer(GravityCompat.START);
}
return true;
}
return false;
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param drawerView The child view that was moved
* @param slideOffset The new offset of this drawer within its range, from 0-1
*/
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
float glyphOffset = mSlider.getPosition();
if (slideOffset > 0.5f) {
glyphOffset = Math.max(glyphOffset, Math.max(0.f, slideOffset - 0.5f) * 2);
} else {
glyphOffset = Math.min(glyphOffset, slideOffset * 2);
}
mSlider.setPosition(glyphOffset);
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param drawerView Drawer view that is now open
*/
@Override
public void onDrawerOpened(View drawerView) {
mSlider.setPosition(1);
if (mDrawerIndicatorEnabled) {
setActionBarDescription(mCloseDrawerContentDescRes);
}
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param drawerView Drawer view that is now closed
*/
@Override
public void onDrawerClosed(View drawerView) {
mSlider.setPosition(0);
if (mDrawerIndicatorEnabled) {
setActionBarDescription(mOpenDrawerContentDescRes);
}
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param newState The new drawer motion state
*/
@Override
public void onDrawerStateChanged(int newState) {
}
Drawable getThemeUpIndicator() {
if (mActivityImpl != null) {
return mActivityImpl.getThemeUpIndicator();
}
return IMPL.getThemeUpIndicator(mActivity);
}
void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes) {
if (mActivityImpl != null) {
mActivityImpl.setActionBarUpIndicator(upDrawable, contentDescRes);
return;
}
mSetIndicatorInfo = IMPL
.setActionBarUpIndicator(mSetIndicatorInfo, mActivity, upDrawable, contentDescRes);
}
void setActionBarDescription(int contentDescRes) {
if (mActivityImpl != null) {
mActivityImpl.setActionBarDescription(contentDescRes);
return;
}
mSetIndicatorInfo = IMPL
.setActionBarDescription(mSetIndicatorInfo, mActivity, contentDescRes);
}
private class SlideDrawable extends InsetDrawable implements Drawable.Callback {
private final boolean mHasMirroring = Build.VERSION.SDK_INT > 18;
private final Rect mTmpRect = new Rect();
private float mPosition;
private float mOffset;
private SlideDrawable(Drawable wrapped) {
super(wrapped, 0);
}
/**
* Sets the current position along the offset.
*
* @param position a value between 0 and 1
*/
public void setPosition(float position) {
mPosition = position;
invalidateSelf();
}
public float getPosition() {
return mPosition;
}
/**
* Specifies the maximum offset when the position is at 1.
*
* @param offset maximum offset as a fraction of the drawable width,
* positive to shift left or negative to shift right.
* @see #setPosition(float)
*/
public void setOffset(float offset) {
mOffset = offset;
invalidateSelf();
}
@Override
public void draw(Canvas canvas) {
copyBounds(mTmpRect);
canvas.save();
// Layout direction must be obtained from the activity.
final boolean isLayoutRTL = ViewCompat.getLayoutDirection(mActivity.getWindow().getDecorView()) == ViewCompat.LAYOUT_DIRECTION_RTL;
final int flipRtl = isLayoutRTL ? -1 : 1;
final int width = mTmpRect.width();
canvas.translate(-mOffset * width * mPosition * flipRtl, 0);
// Force auto-mirroring if it's not supported by the platform.
if (isLayoutRTL && !mHasMirroring) {
canvas.translate(width, 0);
canvas.scale(-1, 1);
}
super.draw(canvas);
canvas.restore();
}
}
}
Raw
CustomDurationDrawerLayout.java
_/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.levibostian.customdurationnavigationdrawer.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.SystemClock;
import android.support.v4.view.AccessibilityDelegateCompat;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.KeyEventCompat;
import android.support.v4.view.MotionEventCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.ViewGroupCompat;
import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v4.widget.ViewDragHelper;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.view.accessibility.AccessibilityEvent;
import java.util.List;
public class CustomDurationDrawerLayout extends ViewGroup {
private static final String TAG = "DrawerLayout";
/**
* Indicates that any drawers are in an idle, settled state. No animation is in progress.
*/
public static final int STATE_IDLE = ViewDragHelper.STATE_IDLE;
/**
* Indicates that a drawer is currently being dragged by the user.
*/
public static final int STATE_DRAGGING = ViewDragHelper.STATE_DRAGGING;
/**
* Indicates that a drawer is in the process of settling to a final position.
*/
public static final int STATE_SETTLING = ViewDragHelper.STATE_SETTLING;
/**
* The drawer is unlocked.
*/
public static final int LOCK_MODE_UNLOCKED = 0;
/**
* The drawer is locked closed. The user may not open it, though
* the app may open it programmatically.
*/
public static final int LOCK_MODE_LOCKED_CLOSED = 1;
/**
* The drawer is locked open. The user may not close it, though the app
* may close it programmatically.
*/
public static final int LOCK_MODE_LOCKED_OPEN = 2;
private static final int MIN_DRAWER_MARGIN = 64; // dp
private static final int DEFAULT_SCRIM_COLOR = 0x99000000;
/**
* Length of time to delay before peeking the drawer.
*/
private static final int PEEK_DELAY = 160; // ms
/**
* Minimum velocity that will be detected as a fling
*/
private static final int MIN_FLING_VELOCITY = 400; // dips per second
/**
* Experimental feature.
*/
private static final boolean ALLOW_EDGE_LOCK = false;
private static final boolean CHILDREN_DISALLOW_INTERCEPT = true;
private static final float TOUCH_SLOP_SENSITIVITY = 1.f;
private static final int[] LAYOUT_ATTRS = new int[] {
android.R.attr.layout_gravity
};
private int mMinDrawerMargin;
private int mScrimColor = DEFAULT_SCRIM_COLOR;
private float mScrimOpacity;
private Paint mScrimPaint = new Paint();
private final CustomDurationViewDragHelper mLeftDragger;
private final CustomDurationViewDragHelper mRightDragger;
private final ViewDragCallback mLeftCallback;
private final ViewDragCallback mRightCallback;
private int mDrawerState;
private boolean mInLayout;
private boolean mFirstLayout = true;
private int mLockModeLeft;
private int mLockModeRight;
private boolean mDisallowInterceptRequested;
private boolean mChildrenCanceledTouch;
private DrawerListener mListener;
private float mInitialMotionX;
private float mInitialMotionY;
private Drawable mShadowLeft;
private Drawable mShadowRight;
private CharSequence mTitleLeft;
private CharSequence mTitleRight;
/**
* Listener for monitoring events about drawers.
*/
public interface DrawerListener {
/**
* Called when a drawer's position changes.
* @param drawerView The child view that was moved
* @param slideOffset The new offset of this drawer within its range, from 0-1
*/
public void onDrawerSlide(View drawerView, float slideOffset);
/**
* Called when a drawer has settled in a completely open state.
* The drawer is interactive at this point.
*
* @param drawerView Drawer view that is now open
*/
public void onDrawerOpened(View drawerView);
/**
* Called when a drawer has settled in a completely closed state.
*
* @param drawerView Drawer view that is now closed
*/
public void onDrawerClosed(View drawerView);
/**
* Called when the drawer motion state changes. The new state will
* be one of {@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}.
*
* @param newState The new drawer motion state
*/
public void onDrawerStateChanged(int newState);
}
/**
* Stub/no-op implementations of all methods of {@link DrawerListener}.
* Override this if you only care about a few of the available callback methods.
*/
public static abstract class SimpleDrawerListener implements DrawerListener {
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
}
@Override
public void onDrawerOpened(View drawerView) {
}
@Override
public void onDrawerClosed(View drawerView) {
}
@Override
public void onDrawerStateChanged(int newState) {
}
}
public CustomDurationDrawerLayout(Context context) {
this(context, null);
}
public CustomDurationDrawerLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CustomDurationDrawerLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
final float density = getResources().getDisplayMetrics().density;
mMinDrawerMargin = (int) (MIN_DRAWER_MARGIN * density + 0.5f);
final float minVel = MIN_FLING_VELOCITY * density;
mLeftCallback = new ViewDragCallback(Gravity.LEFT);
mRightCallback = new ViewDragCallback(Gravity.RIGHT);
mLeftDragger = CustomDurationViewDragHelper.create(this, TOUCH_SLOP_SENSITIVITY, mLeftCallback);
mLeftDragger.setEdgeTrackingEnabled(ViewDragHelper.EDGE_LEFT);
mLeftDragger.setMinVelocity(minVel);
mLeftCallback.setDragger(mLeftDragger);
mRightDragger = CustomDurationViewDragHelper.create(this, TOUCH_SLOP_SENSITIVITY, mRightCallback);
mRightDragger.setEdgeTrackingEnabled(ViewDragHelper.EDGE_RIGHT);
mRightDragger.setMinVelocity(minVel);
mRightCallback.setDragger(mRightDragger);
// So that we can catch the back button
setFocusableInTouchMode(true);
ViewCompat.setAccessibilityDelegate(this, new AccessibilityDelegate());
ViewGroupCompat.setMotionEventSplittingEnabled(this, false);
}
/**
* Set a simple drawable used for the left or right shadow.
* The drawable provided must have a nonzero intrinsic width.
*
* @param shadowDrawable Shadow drawable to use at the edge of a drawer
* @param gravity Which drawer the shadow should apply to
*/
public void setDrawerShadow(Drawable shadowDrawable, int gravity) {
/*
* TODO Someone someday might want to set more complex drawables here.
* They're probably nuts, but we might want to consider registering callbacks,
* setting states, etc. properly.
*/
final int absGravity = GravityCompat.getAbsoluteGravity(gravity, ViewCompat.getLayoutDirection(this));
if ((absGravity & Gravity.LEFT) == Gravity.LEFT) {
mShadowLeft = shadowDrawable;
invalidate();
}
if ((absGravity & Gravity.RIGHT) == Gravity.RIGHT) {
mShadowRight = shadowDrawable;
invalidate();
}
}
/**
* Set a simple drawable used for the left or right shadow.
* The drawable provided must have a nonzero intrinsic width.
*
* @param resId Resource id of a shadow drawable to use at the edge of a drawer
* @param gravity Which drawer the shadow should apply to
*/
public void setDrawerShadow(int resId, int gravity) {
setDrawerShadow(getResources().getDrawable(resId), gravity);
}
/**
* Set a color to use for the scrim that obscures primary content while a drawer is open.
*
* @param color Color to use in 0xAARRGGBB format.
*/
public void setScrimColor(int color) {
mScrimColor = color;
invalidate();
}
/**
* Set a listener to be notified of drawer events.
*
* @param listener Listener to notify when drawer events occur
* @see DrawerListener
*/
public void setDrawerListener(DrawerListener listener) {
mListener = listener;
}
/**
* Enable or disable interaction with all drawers.
*
* <p>This allows the application to restrict the user's ability to open or close
* any drawer within this layout. DrawerLayout will still respond to calls to
* {@link #openDrawer(int)}, {@link #closeDrawer(int)} and friends if a drawer is locked.</p>
*
* <p>Locking drawers open or closed will implicitly open or close
* any drawers as appropriate.</p>
*
* @param lockMode The new lock mode for the given drawer. One of {@link #LOCK_MODE_UNLOCKED},
* {@link #LOCK_MODE_LOCKED_CLOSED} or {@link #LOCK_MODE_LOCKED_OPEN}.
*/
public void setDrawerLockMode(int lockMode) {
setDrawerLockMode(lockMode, Gravity.LEFT);
setDrawerLockMode(lockMode, Gravity.RIGHT);
}
/**
* Enable or disable interaction with the given drawer.
*
* <p>This allows the application to restrict the user's ability to open or close
* the given drawer. DrawerLayout will still respond to calls to {@link #openDrawer(int)},
* {@link #closeDrawer(int)} and friends if a drawer is locked.</p>
*
* <p>Locking a drawer open or closed will implicitly open or close
* that drawer as appropriate.</p>
*
* @param lockMode The new lock mode for the given drawer. One of {@link #LOCK_MODE_UNLOCKED},
* {@link #LOCK_MODE_LOCKED_CLOSED} or {@link #LOCK_MODE_LOCKED_OPEN}.
* @param edgeGravity Gravity.LEFT, RIGHT, START or END.
* Expresses which drawer to change the mode for.
*
* @see #LOCK_MODE_UNLOCKED
* @see #LOCK_MODE_LOCKED_CLOSED
* @see #LOCK_MODE_LOCKED_OPEN
*/
public void setDrawerLockMode(int lockMode, int edgeGravity) {
final int absGravity = GravityCompat.getAbsoluteGravity(edgeGravity,
ViewCompat.getLayoutDirection(this));
if (absGravity == Gravity.LEFT) {
mLockModeLeft = lockMode;
} else if (absGravity == Gravity.RIGHT) {
mLockModeRight = lockMode;
}
if (lockMode != LOCK_MODE_UNLOCKED) {
// Cancel interaction in progress
final CustomDurationViewDragHelper helper = absGravity == Gravity.LEFT ? mLeftDragger : mRightDragger;
helper.cancel();
}
switch (lockMode) {
case LOCK_MODE_LOCKED_OPEN:
final View toOpen = findDrawerWithGravity(absGravity);
if (toOpen != null) {
openDrawer(toOpen);
}
break;
case LOCK_MODE_LOCKED_CLOSED:
final View toClose = findDrawerWithGravity(absGravity);
if (toClose != null) {
closeDrawer(toClose);
}
break;
// default: do nothing
}
}
/**
* Enable or disable interaction with the given drawer.
*
* <p>This allows the application to restrict the user's ability to open or close
* the given drawer. DrawerLayout will still respond to calls to {@link #openDrawer(int)},
* {@link #closeDrawer(int)} and friends if a drawer is locked.</p>
*
* <p>Locking a drawer open or closed will implicitly open or close
* that drawer as appropriate.</p>
*
* @param lockMode The new lock mode for the given drawer. One of {@link #LOCK_MODE_UNLOCKED},
* {@link #LOCK_MODE_LOCKED_CLOSED} or {@link #LOCK_MODE_LOCKED_OPEN}.
* @param drawerView The drawer view to change the lock mode for
*
* @see #LOCK_MODE_UNLOCKED
* @see #LOCK_MODE_LOCKED_CLOSED
* @see #LOCK_MODE_LOCKED_OPEN
*/
public void setDrawerLockMode(int lockMode, View drawerView) {
if (!isDrawerView(drawerView)) {
throw new IllegalArgumentException("View " + drawerView + " is not a " +
"drawer with appropriate layout_gravity");
}
final int gravity = ((LayoutParams) drawerView.getLayoutParams()).gravity;
setDrawerLockMode(lockMode, gravity);
}
/**
* Check the lock mode of the drawer with the given gravity.
*
* @param edgeGravity Gravity of the drawer to check
* @return one of {@link #LOCK_MODE_UNLOCKED}, {@link #LOCK_MODE_LOCKED_CLOSED} or
* {@link #LOCK_MODE_LOCKED_OPEN}.
*/
public int getDrawerLockMode(int edgeGravity) {
final int absGravity = GravityCompat.getAbsoluteGravity(
edgeGravity, ViewCompat.getLayoutDirection(this));
if (absGravity == Gravity.LEFT) {
return mLockModeLeft;
} else if (absGravity == Gravity.RIGHT) {
return mLockModeRight;
}
return LOCK_MODE_UNLOCKED;
}
/**
* Check the lock mode of the given drawer view.
*
* @param drawerView Drawer view to check lock mode
* @return one of {@link #LOCK_MODE_UNLOCKED}, {@link #LOCK_MODE_LOCKED_CLOSED} or
* {@link #LOCK_MODE_LOCKED_OPEN}.
*/
public int getDrawerLockMode(View drawerView) {
final int absGravity = getDrawerViewAbsoluteGravity(drawerView);
if (absGravity == Gravity.LEFT) {
return mLockModeLeft;
} else if (absGravity == Gravity.RIGHT) {
return mLockModeRight;
}
return LOCK_MODE_UNLOCKED;
}
/**
* Sets the title of the drawer with the given gravity.
* <p>
* When accessibility is turned on, this is the title that will be used to
* identify the drawer to the active accessibility service.
*
* @param edgeGravity Gravity.LEFT, RIGHT, START or END. Expresses which
* drawer to set the title for.
* @param title The title for the drawer.
*/
public void setDrawerTitle(int edgeGravity, CharSequence title) {
final int absGravity = GravityCompat.getAbsoluteGravity(
edgeGravity, ViewCompat.getLayoutDirection(this));
if (absGravity == Gravity.LEFT) {
mTitleLeft = title;
} else if (absGravity == Gravity.RIGHT) {
mTitleRight = title;
}
}
/**
* Returns the title of the drawer with the given gravity.
*
* @param edgeGravity Gravity.LEFT, RIGHT, START or END. Expresses which
* drawer to return the title for.
* @return The title of the drawer, or null if none set.
* @see #setDrawerTitle(int, CharSequence)
*/
public CharSequence getDrawerTitle(int edgeGravity) {
final int absGravity = GravityCompat.getAbsoluteGravity(
edgeGravity, ViewCompat.getLayoutDirection(this));
if (absGravity == Gravity.LEFT) {
return mTitleLeft;
} else if (absGravity == Gravity.RIGHT) {
return mTitleRight;
}
return null;
}
/**
* Resolve the shared state of all drawers from the component ViewDragHelpers.
* Should be called whenever a ViewDragHelper's state changes.
*/
void updateDrawerState(int forGravity, int activeState, View activeDrawer) {
final int leftState = mLeftDragger.getViewDragState();
final int rightState = mRightDragger.getViewDragState();
final int state;
if (leftState == STATE_DRAGGING || rightState == STATE_DRAGGING) {
state = STATE_DRAGGING;
} else if (leftState == STATE_SETTLING || rightState == STATE_SETTLING) {
state = STATE_SETTLING;
} else {
state = STATE_IDLE;
}
if (activeDrawer != null && activeState == STATE_IDLE) {
final LayoutParams lp = (LayoutParams) activeDrawer.getLayoutParams();
if (lp.onScreen == 0) {
dispatchOnDrawerClosed(activeDrawer);
} else if (lp.onScreen == 1) {
dispatchOnDrawerOpened(activeDrawer);
}
}
if (state != mDrawerState) {
mDrawerState = state;
if (mListener != null) {
mListener.onDrawerStateChanged(state);
}
}
}
void dispatchOnDrawerClosed(View drawerView) {
final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
if (lp.knownOpen) {
lp.knownOpen = false;
if (mListener != null) {
mListener.onDrawerClosed(drawerView);
}
// Only send WINDOW_STATE_CHANGE if the host has window focus. This
// may change if support for multiple foreground windows (e.g. IME)
// improves.
if (hasWindowFocus()) {
final View rootView = getRootView();
if (rootView != null) {
rootView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
}
}
}
}
void dispatchOnDrawerOpened(View drawerView) {
final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
if (!lp.knownOpen) {
lp.knownOpen = true;
if (mListener != null) {
mListener.onDrawerOpened(drawerView);
}
sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
}
}
void dispatchOnDrawerSlide(View drawerView, float slideOffset) {
if (mListener != null) {
mListener.onDrawerSlide(drawerView, slideOffset);
}
}
void setDrawerViewOffset(View drawerView, float slideOffset) {
final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
if (slideOffset == lp.onScreen) {
return;
}
lp.onScreen = slideOffset;
dispatchOnDrawerSlide(drawerView, slideOffset);
}
float getDrawerViewOffset(View drawerView) {
return ((LayoutParams) drawerView.getLayoutParams()).onScreen;
}
/**
* @return the absolute gravity of the child drawerView, resolved according
* to the current layout direction
*/
int getDrawerViewAbsoluteGravity(View drawerView) {
final int gravity = ((LayoutParams) drawerView.getLayoutParams()).gravity;
return GravityCompat.getAbsoluteGravity(gravity, ViewCompat.getLayoutDirection(this));
}
boolean checkDrawerViewAbsoluteGravity(View drawerView, int checkFor) {
final int absGravity = getDrawerViewAbsoluteGravity(drawerView);
return (absGravity & checkFor) == checkFor;
}
View findOpenDrawer() {
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (((LayoutParams) child.getLayoutParams()).knownOpen) {
return child;
}
}
return null;
}
void moveDrawerToOffset(View drawerView, float slideOffset) {
final float oldOffset = getDrawerViewOffset(drawerView);
final int width = drawerView.getWidth();
final int oldPos = (int) (width * oldOffset);
final int newPos = (int) (width * slideOffset);
final int dx = newPos - oldPos;
drawerView.offsetLeftAndRight(
checkDrawerViewAbsoluteGravity(drawerView, Gravity.LEFT) ? dx : -dx);
setDrawerViewOffset(drawerView, slideOffset);
}
/**
* @param gravity the gravity of the child to return. If specified as a
* relative value, it will be resolved according to the current
* layout direction.
* @return the drawer with the specified gravity
*/
View findDrawerWithGravity(int gravity) {
final int absHorizGravity = GravityCompat.getAbsoluteGravity(
gravity, ViewCompat.getLayoutDirection(this)) & Gravity.HORIZONTAL_GRAVITY_MASK;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
final int childAbsGravity = getDrawerViewAbsoluteGravity(child);
if ((childAbsGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == absHorizGravity) {
return child;
}
}
return null;
}
/**
* Simple gravity to string - only supports LEFT and RIGHT for debugging output.
*
* @param gravity Absolute gravity value
* @return LEFT or RIGHT as appropriate, or a hex string
*/
static String gravityToString(int gravity) {
if ((gravity & Gravity.LEFT) == Gravity.LEFT) {
return "LEFT";
}
if ((gravity & Gravity.RIGHT) == Gravity.RIGHT) {
return "RIGHT";
}
return Integer.toHexString(gravity);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mFirstLayout = true;
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
mFirstLayout = true;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
if (widthMode != MeasureSpec.EXACTLY || heightMode != MeasureSpec.EXACTLY) {
if (isInEditMode()) {
// Don't crash the layout editor. Consume all of the space if specified
// or pick a magic number from thin air otherwise.
// TODO Better communication with tools of this bogus state.
// It will crash on a real device.
if (widthMode == MeasureSpec.AT_MOST) {
widthMode = MeasureSpec.EXACTLY;
} else if (widthMode == MeasureSpec.UNSPECIFIED) {
widthMode = MeasureSpec.EXACTLY;
widthSize = 300;
}
if (heightMode == MeasureSpec.AT_MOST) {
heightMode = MeasureSpec.EXACTLY;
}
else if (heightMode == MeasureSpec.UNSPECIFIED) {
heightMode = MeasureSpec.EXACTLY;
heightSize = 300;
}
} else {
throw new IllegalArgumentException(
"DrawerLayout must be measured with MeasureSpec.EXACTLY.");
}
}
setMeasuredDimension(widthSize, heightSize);
// Gravity value for each drawer we've seen. Only one of each permitted.
int foundDrawers = 0;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (isContentView(child)) {
// Content views get measured at exactly the layout's size.
final int contentWidthSpec = MeasureSpec.makeMeasureSpec(
widthSize - lp.leftMargin - lp.rightMargin, MeasureSpec.EXACTLY);
final int contentHeightSpec = MeasureSpec.makeMeasureSpec(
heightSize - lp.topMargin - lp.bottomMargin, MeasureSpec.EXACTLY);
child.measure(contentWidthSpec, contentHeightSpec);
} else if (isDrawerView(child)) {
final int childGravity =
getDrawerViewAbsoluteGravity(child) & Gravity.HORIZONTAL_GRAVITY_MASK;
if ((foundDrawers & childGravity) != 0) {
throw new IllegalStateException("Child drawer has absolute gravity " +
gravityToString(childGravity) + " but this " + TAG + " already has a " +
"drawer view along that edge");
}
final int drawerWidthSpec = getChildMeasureSpec(widthMeasureSpec,
mMinDrawerMargin + lp.leftMargin + lp.rightMargin,
lp.width);
final int drawerHeightSpec = getChildMeasureSpec(heightMeasureSpec,
lp.topMargin + lp.bottomMargin,
lp.height);
child.measure(drawerWidthSpec, drawerHeightSpec);
} else {
throw new IllegalStateException("Child " + child + " at index " + i +
" does not have a valid layout_gravity - must be Gravity.LEFT, " +
"Gravity.RIGHT or Gravity.NO_GRAVITY");
}
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
mInLayout = true;
final int width = r - l;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (isContentView(child)) {
child.layout(lp.leftMargin, lp.topMargin,
lp.leftMargin + child.getMeasuredWidth(),
lp.topMargin + child.getMeasuredHeight());
} else { // Drawer, if it wasn't onMeasure would have thrown an exception.
final int childWidth = child.getMeasuredWidth();
final int childHeight = child.getMeasuredHeight();
int childLeft;
final float newOffset;
if (checkDrawerViewAbsoluteGravity(child, Gravity.LEFT)) {
childLeft = -childWidth + (int) (childWidth * lp.onScreen);
newOffset = (float) (childWidth + childLeft) / childWidth;
} else { // Right; onMeasure checked for us.
childLeft = width - (int) (childWidth * lp.onScreen);
newOffset = (float) (width - childLeft) / childWidth;
}
final boolean changeOffset = newOffset != lp.onScreen;
final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
switch (vgrav) {
default:
case Gravity.TOP: {
child.layout(childLeft, lp.topMargin, childLeft + childWidth,
lp.topMargin + childHeight);
break;
}
case Gravity.BOTTOM: {
final int height = b - t;
child.layout(childLeft,
height - lp.bottomMargin - child.getMeasuredHeight(),
childLeft + childWidth,
height - lp.bottomMargin);
break;
}
case Gravity.CENTER_VERTICAL: {
final int height = b - t;
int childTop = (height - childHeight) / 2;
// Offset for margins. If things don't fit right because of
// bad measurement before, oh well.
if (childTop < lp.topMargin) {
childTop = lp.topMargin;
} else if (childTop + childHeight > height - lp.bottomMargin) {
childTop = height - lp.bottomMargin - childHeight;
}
child.layout(childLeft, childTop, childLeft + childWidth,
childTop + childHeight);
break;
}
}
if (changeOffset) {
setDrawerViewOffset(child, newOffset);
}
final int newVisibility = lp.onScreen > 0 ? VISIBLE : INVISIBLE;
if (child.getVisibility() != newVisibility) {
child.setVisibility(newVisibility);
}
}
}
mInLayout = false;
mFirstLayout = false;
}
@Override
public void requestLayout() {
if (!mInLayout) {
super.requestLayout();
}
}
@Override
public void computeScroll() {
final int childCount = getChildCount();
float scrimOpacity = 0;
for (int i = 0; i < childCount; i++) {
final float onscreen = ((LayoutParams) getChildAt(i).getLayoutParams()).onScreen;
scrimOpacity = Math.max(scrimOpacity, onscreen);
}
mScrimOpacity = scrimOpacity;
// "|" used on purpose; both need to run.
if (mLeftDragger.continueSettling(true) | mRightDragger.continueSettling(true)) {
ViewCompat.postInvalidateOnAnimation(this);
}
}
private static boolean hasOpaqueBackground(View v) {
final Drawable bg = v.getBackground();
if (bg != null) {
return bg.getOpacity() == PixelFormat.OPAQUE;
}
return false;
}
@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
final int height = getHeight();
final boolean drawingContent = isContentView(child);
int clipLeft = 0, clipRight = getWidth();
final int restoreCount = canvas.save();
if (drawingContent) {
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View v = getChildAt(i);
if (v == child || v.getVisibility() != VISIBLE ||
!hasOpaqueBackground(v) || !isDrawerView(v) ||
v.getHeight() < height) {
continue;
}
if (checkDrawerViewAbsoluteGravity(v, Gravity.LEFT)) {
final int vright = v.getRight();
if (vright > clipLeft) clipLeft = vright;
} else {
final int vleft = v.getLeft();
if (vleft < clipRight) clipRight = vleft;
}
}
canvas.clipRect(clipLeft, 0, clipRight, getHeight());
}
final boolean result = super.drawChild(canvas, child, drawingTime);
canvas.restoreToCount(restoreCount);
if (mScrimOpacity > 0 && drawingContent) {
final int baseAlpha = (mScrimColor & 0xff000000) >>> 24;
final int imag = (int) (baseAlpha * mScrimOpacity);
final int color = imag << 24 | (mScrimColor & 0xffffff);
mScrimPaint.setColor(color);
canvas.drawRect(clipLeft, 0, clipRight, getHeight(), mScrimPaint);
} else if (mShadowLeft != null && checkDrawerViewAbsoluteGravity(child, Gravity.LEFT)) {
final int shadowWidth = mShadowLeft.getIntrinsicWidth();
final int childRight = child.getRight();
final int drawerPeekDistance = mLeftDragger.getEdgeSize();
final float alpha =
Math.max(0, Math.min((float) childRight / drawerPeekDistance, 1.f));
mShadowLeft.setBounds(childRight, child.getTop(),
childRight + shadowWidth, child.getBottom());
mShadowLeft.setAlpha((int) (0xff * alpha));
mShadowLeft.draw(canvas);
} else if (mShadowRight != null && checkDrawerViewAbsoluteGravity(child, Gravity.RIGHT)) {
final int shadowWidth = mShadowRight.getIntrinsicWidth();
final int childLeft = child.getLeft();
final int showing = getWidth() - childLeft;
final int drawerPeekDistance = mRightDragger.getEdgeSize();
final float alpha =
Math.max(0, Math.min((float) showing / drawerPeekDistance, 1.f));
mShadowRight.setBounds(childLeft - shadowWidth, child.getTop(),
childLeft, child.getBottom());
mShadowRight.setAlpha((int) (0xff * alpha));
mShadowRight.draw(canvas);
}
return result;
}
boolean isContentView(View child) {
return ((LayoutParams) child.getLayoutParams()).gravity == Gravity.NO_GRAVITY;
}
boolean isDrawerView(View child) {
final int gravity = ((LayoutParams) child.getLayoutParams()).gravity;
final int absGravity = GravityCompat.getAbsoluteGravity(gravity,
ViewCompat.getLayoutDirection(child));
return (absGravity & (Gravity.LEFT | Gravity.RIGHT)) != 0;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
final int action = MotionEventCompat.getActionMasked(ev);
// "|" used deliberately here; both methods should be invoked.
final boolean interceptForDrag = mLeftDragger.shouldInterceptTouchEvent(ev) |
mRightDragger.shouldInterceptTouchEvent(ev);
boolean interceptForTap = false;
switch (action) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();
mInitialMotionX = x;
mInitialMotionY = y;
if (mScrimOpacity > 0 &&
isContentView(mLeftDragger.findTopChildUnder((int) x, (int) y))) {
interceptForTap = true;
}
mDisallowInterceptRequested = false;
mChildrenCanceledTouch = false;
break;
}
case MotionEvent.ACTION_MOVE: {
// If we cross the touch slop, don't perform the delayed peek for an edge touch.
if (mLeftDragger.checkTouchSlop(ViewDragHelper.DIRECTION_ALL)) {
mLeftCallback.removeCallbacks();
mRightCallback.removeCallbacks();
}
break;
}
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP: {
closeDrawers(true);
mDisallowInterceptRequested = false;
mChildrenCanceledTouch = false;
}
}
return interceptForDrag || interceptForTap || hasPeekingDrawer() || mChildrenCanceledTouch;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
mLeftDragger.processTouchEvent(ev);
mRightDragger.processTouchEvent(ev);
final int action = ev.getAction();
boolean wantTouchEvents = true;
switch (action & MotionEventCompat.ACTION_MASK) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();
mInitialMotionX = x;
mInitialMotionY = y;
mDisallowInterceptRequested = false;
mChildrenCanceledTouch = false;
break;
}
case MotionEvent.ACTION_UP: {
final float x = ev.getX();
final float y = ev.getY();
boolean peekingOnly = true;
final View touchedView = mLeftDragger.findTopChildUnder((int) x, (int) y);
if (touchedView != null && isContentView(touchedView)) {
final float dx = x - mInitialMotionX;
final float dy = y - mInitialMotionY;
final int slop = mLeftDragger.getTouchSlop();
if (dx * dx + dy * dy < slop * slop) {
// Taps close a dimmed open drawer but only if it isn't locked open.
final View openDrawer = findOpenDrawer();
if (openDrawer != null) {
peekingOnly = getDrawerLockMode(openDrawer) == LOCK_MODE_LOCKED_OPEN;
}
}
}
closeDrawers(peekingOnly);
mDisallowInterceptRequested = false;
break;
}
case MotionEvent.ACTION_CANCEL: {
closeDrawers(true);
mDisallowInterceptRequested = false;
mChildrenCanceledTouch = false;
break;
}
}
return wantTouchEvents;
}
public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) {
if (CHILDREN_DISALLOW_INTERCEPT ||
(!mLeftDragger.isEdgeTouched(ViewDragHelper.EDGE_LEFT) &&
!mRightDragger.isEdgeTouched(ViewDragHelper.EDGE_RIGHT))) {
// If we have an edge touch we want to skip this and track it for later instead.
super.requestDisallowInterceptTouchEvent(disallowIntercept);
}
mDisallowInterceptRequested = disallowIntercept;
if (disallowIntercept) {
closeDrawers(true);
}
}
/**
* Close all currently open drawer views by animating them out of view.
*/
public void closeDrawers() {
closeDrawers(false);
}
void closeDrawers(boolean peekingOnly) {
boolean needsInvalidate = false;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (!isDrawerView(child) || (peekingOnly && !lp.isPeeking)) {
continue;
}
final int childWidth = child.getWidth();
if (checkDrawerViewAbsoluteGravity(child, Gravity.LEFT)) {
needsInvalidate |= mLeftDragger.smoothSlideViewTo(child,
-childWidth, child.getTop());
} else {
needsInvalidate |= mRightDragger.smoothSlideViewTo(child,
getWidth(), child.getTop());
}
lp.isPeeking = false;
}
mLeftCallback.removeCallbacks();
mRightCallback.removeCallbacks();
if (needsInvalidate) {
invalidate();
}
}
/**
* Open the specified drawer view by animating it into view.
*
* @param drawerView Drawer view to open
*/
public void openDrawer(View drawerView) {
if (!isDrawerView(drawerView)) {
throw new IllegalArgumentException("View " + drawerView + " is not a sliding drawer");
}
if (mFirstLayout) {
final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
lp.onScreen = 1.f;
lp.knownOpen = true;
} else {
if (checkDrawerViewAbsoluteGravity(drawerView, Gravity.LEFT)) {
mLeftDragger.smoothSlideViewTo(drawerView, 0, drawerView.getTop());
} else {
mRightDragger.smoothSlideViewTo(drawerView, getWidth() - drawerView.getWidth(),
drawerView.getTop());
}
}
invalidate();
}
/**
* Open the specified drawer by animating it out of view.
*
* @param gravity Gravity.LEFT to move the left drawer or Gravity.RIGHT for the right.
* GravityCompat.START or GravityCompat.END may also be used.
*/
public void openDrawer(int gravity) {
final View drawerView = findDrawerWithGravity(gravity);
if (drawerView == null) {
throw new IllegalArgumentException("No drawer view found with gravity " +
gravityToString(gravity));
}
openDrawer(drawerView);
}
/**
* Close the specified drawer view by animating it into view.
*
* @param drawerView Drawer view to close
*/
public void closeDrawer(View drawerView) {
if (!isDrawerView(drawerView)) {
throw new IllegalArgumentException("View " + drawerView + " is not a sliding drawer");
}
if (mFirstLayout) {
final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
lp.onScreen = 0.f;
lp.knownOpen = false;
} else {
if (checkDrawerViewAbsoluteGravity(drawerView, Gravity.LEFT)) {
mLeftDragger.smoothSlideViewTo(drawerView, -drawerView.getWidth(),
drawerView.getTop());
} else {
mRightDragger.smoothSlideViewTo(drawerView, getWidth(), drawerView.getTop());
}
}
invalidate();
}
/**
* Close the specified drawer by animating it out of view.
*
* @param gravity Gravity.LEFT to move the left drawer or Gravity.RIGHT for the right.
* GravityCompat.START or GravityCompat.END may also be used.
*/
public void closeDrawer(int gravity) {
final View drawerView = findDrawerWithGravity(gravity);
if (drawerView == null) {
throw new IllegalArgumentException("No drawer view found with gravity " +
gravityToString(gravity));
}
closeDrawer(drawerView);
}
/**
* Check if the given drawer view is currently in an open state.
* To be considered "open" the drawer must have settled into its fully
* visible state. To check for partial visibility use
* {@link #isDrawerVisible(android.view.View)}.
*
* @param drawer Drawer view to check
* @return true if the given drawer view is in an open state
* @see #isDrawerVisible(android.view.View)
*/
public boolean isDrawerOpen(View drawer) {
if (!isDrawerView(drawer)) {
throw new IllegalArgumentException("View " + drawer + " is not a drawer");
}
return ((LayoutParams) drawer.getLayoutParams()).knownOpen;
}
/**
* Check if the given drawer view is currently in an open state.
* To be considered "open" the drawer must have settled into its fully
* visible state. If there is no drawer with the given gravity this method
* will return false.
*
* @param drawerGravity Gravity of the drawer to check
* @return true if the given drawer view is in an open state
*/
public boolean isDrawerOpen(int drawerGravity) {
final View drawerView = findDrawerWithGravity(drawerGravity);
if (drawerView != null) {
return isDrawerOpen(drawerView);
}
return false;
}
/**
* Check if a given drawer view is currently visible on-screen. The drawer
* may be only peeking onto the screen, fully extended, or anywhere inbetween.
*
* @param drawer Drawer view to check
* @return true if the given drawer is visible on-screen
* @see #isDrawerOpen(android.view.View)
*/
public boolean isDrawerVisible(View drawer) {
if (!isDrawerView(drawer)) {
throw new IllegalArgumentException("View " + drawer + " is not a drawer");
}
return ((LayoutParams) drawer.getLayoutParams()).onScreen > 0;
}
/**
* Check if a given drawer view is currently visible on-screen. The drawer
* may be only peeking onto the screen, fully extended, or anywhere inbetween.
* If there is no drawer with the given gravity this method will return false.
*
* @param drawerGravity Gravity of the drawer to check
* @return true if the given drawer is visible on-screen
*/
public boolean isDrawerVisible(int drawerGravity) {
final View drawerView = findDrawerWithGravity(drawerGravity);
if (drawerView != null) {
return isDrawerVisible(drawerView);
}
return false;
}
private boolean hasPeekingDrawer() {
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final LayoutParams lp = (LayoutParams) getChildAt(i).getLayoutParams();
if (lp.isPeeking) {
return true;
}
}
return false;
}
@Override
protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
}
@Override
protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
return p instanceof LayoutParams
? new LayoutParams((LayoutParams) p)
: p instanceof ViewGroup.MarginLayoutParams
? new LayoutParams((MarginLayoutParams) p)
: new LayoutParams(p);
}
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
return p instanceof LayoutParams && super.checkLayoutParams(p);
}
@Override
public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) {
return new LayoutParams(getContext(), attrs);
}
private boolean hasVisibleDrawer() {
return findVisibleDrawer() != null;
}
private View findVisibleDrawer() {
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (isDrawerView(child) && isDrawerVisible(child)) {
return child;
}
}
return null;
}
void cancelChildViewTouch() {
// Cancel child touches
if (!mChildrenCanceledTouch) {
final long now = SystemClock.uptimeMillis();
final MotionEvent cancelEvent = MotionEvent.obtain(now, now,
MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0);
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
getChildAt(i).dispatchTouchEvent(cancelEvent);
}
cancelEvent.recycle();
mChildrenCanceledTouch = true;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && hasVisibleDrawer()) {
KeyEventCompat.startTracking(event);
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
final View visibleDrawer = findVisibleDrawer();
if (visibleDrawer != null && getDrawerLockMode(visibleDrawer) == LOCK_MODE_UNLOCKED) {
closeDrawers();
}
return visibleDrawer != null;
}
return super.onKeyUp(keyCode, event);
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
final SavedState ss = (SavedState) state;
super.onRestoreInstanceState(ss.getSuperState());
if (ss.openDrawerGravity != Gravity.NO_GRAVITY) {
final View toOpen = findDrawerWithGravity(ss.openDrawerGravity);
if (toOpen != null) {
openDrawer(toOpen);
}
}
setDrawerLockMode(ss.lockModeLeft, Gravity.LEFT);
setDrawerLockMode(ss.lockModeRight, Gravity.RIGHT);
}
@Override
protected Parcelable onSaveInstanceState() {
final Parcelable superState = super.onSaveInstanceState();
final SavedState ss = new SavedState(superState);
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (!isDrawerView(child)) {
continue;
}
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (lp.knownOpen) {
ss.openDrawerGravity = lp.gravity;
// Only one drawer can be open at a time.
break;
}
}
ss.lockModeLeft = mLockModeLeft;
ss.lockModeRight = mLockModeRight;
return ss;
}
/**
* State persisted across instances
*/
protected static class SavedState extends BaseSavedState {
int openDrawerGravity = Gravity.NO_GRAVITY;
int lockModeLeft = LOCK_MODE_UNLOCKED;
int lockModeRight = LOCK_MODE_UNLOCKED;
public SavedState(Parcel in) {
super(in);
openDrawerGravity = in.readInt();
}
public SavedState(Parcelable superState) {
super(superState);
}
@Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
dest.writeInt(openDrawerGravity);
}
public static final Parcelable.Creator<SavedState> CREATOR =
new Parcelable.Creator<SavedState>() {
@Override
public SavedState createFromParcel(Parcel source) {
return new SavedState(source);
}
@Override
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
private class ViewDragCallback extends CustomDurationViewDragHelper.Callback {
private final int mAbsGravity;
private CustomDurationViewDragHelper mDragger;
private final Runnable mPeekRunnable = new Runnable() {
@Override public void run() {
peekDrawer();
}
};
public ViewDragCallback(int gravity) {
mAbsGravity = gravity;
}
public void setDragger(CustomDurationViewDragHelper dragger) {
mDragger = dragger;
}
public void removeCallbacks() {
CustomDurationDrawerLayout.this.removeCallbacks(mPeekRunnable);
}
@Override
public boolean tryCaptureView(View child, int pointerId) {
// Only capture views where the gravity matches what we're looking for.
// This lets us use two ViewDragHelpers, one for each side drawer.
return isDrawerView(child) && checkDrawerViewAbsoluteGravity(child, mAbsGravity)
&& getDrawerLockMode(child) == LOCK_MODE_UNLOCKED;
}
@Override
public void onViewDragStateChanged(int state) {
updateDrawerState(mAbsGravity, state, mDragger.getCapturedView());
}
@Override
public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {
float offset;
final int childWidth = changedView.getWidth();
// This reverses the positioning shown in onLayout.
if (checkDrawerViewAbsoluteGravity(changedView, Gravity.LEFT)) {
offset = (float) (childWidth + left) / childWidth;
} else {
final int width = getWidth();
offset = (float) (width - left) / childWidth;
}
setDrawerViewOffset(changedView, offset);
changedView.setVisibility(offset == 0 ? INVISIBLE : VISIBLE);
invalidate();
}
@Override
public void onViewCaptured(View capturedChild, int activePointerId) {
final LayoutParams lp = (LayoutParams) capturedChild.getLayoutParams();
lp.isPeeking = false;
closeOtherDrawer();
}
private void closeOtherDrawer() {
final int otherGrav = mAbsGravity == Gravity.LEFT ? Gravity.RIGHT : Gravity.LEFT;
final View toClose = findDrawerWithGravity(otherGrav);
if (toClose != null) {
closeDrawer(toClose);
}
}
@Override
public void onViewReleased(View releasedChild, float xvel, float yvel) {
// Offset is how open the drawer is, therefore left/right values
// are reversed from one another.
final float offset = getDrawerViewOffset(releasedChild);
final int childWidth = releasedChild.getWidth();
int left;
if (checkDrawerViewAbsoluteGravity(releasedChild, Gravity.LEFT)) {
left = xvel > 0 || xvel == 0 && offset > 0.5f ? 0 : -childWidth;
} else {
final int width = getWidth();
left = xvel < 0 || xvel == 0 && offset > 0.5f ? width - childWidth : width;
}
mDragger.settleCapturedViewAt(left, releasedChild.getTop());
invalidate();
}
@Override
public void onEdgeTouched(int edgeFlags, int pointerId) {
postDelayed(mPeekRunnable, PEEK_DELAY);
}
private void peekDrawer() {
final View toCapture;
final int childLeft;
final int peekDistance = mDragger.getEdgeSize();
final boolean leftEdge = mAbsGravity == Gravity.LEFT;
if (leftEdge) {
toCapture = findDrawerWithGravity(Gravity.LEFT);
childLeft = (toCapture != null ? -toCapture.getWidth() : 0) + peekDistance;
} else {
toCapture = findDrawerWithGravity(Gravity.RIGHT);
childLeft = getWidth() - peekDistance;
}
// Only peek if it would mean making the drawer more visible and the drawer isn't locked
if (toCapture != null && ((leftEdge && toCapture.getLeft() < childLeft) ||
(!leftEdge && toCapture.getLeft() > childLeft)) &&
getDrawerLockMode(toCapture) == LOCK_MODE_UNLOCKED) {
final LayoutParams lp = (LayoutParams) toCapture.getLayoutParams();
mDragger.smoothSlideViewTo(toCapture, childLeft, toCapture.getTop());
lp.isPeeking = true;
invalidate();
closeOtherDrawer();
cancelChildViewTouch();
}
}
@Override
public boolean onEdgeLock(int edgeFlags) {
if (ALLOW_EDGE_LOCK) {
final View drawer = findDrawerWithGravity(mAbsGravity);
if (drawer != null && !isDrawerOpen(drawer)) {
closeDrawer(drawer);
}
return true;
}
return false;
}
@Override
public void onEdgeDragStarted(int edgeFlags, int pointerId) {
final View toCapture;
if ((edgeFlags & ViewDragHelper.EDGE_LEFT) == ViewDragHelper.EDGE_LEFT) {
toCapture = findDrawerWithGravity(Gravity.LEFT);
} else {
toCapture = findDrawerWithGravity(Gravity.RIGHT);
}
if (toCapture != null && getDrawerLockMode(toCapture) == LOCK_MODE_UNLOCKED) {
mDragger.captureChildView(toCapture, pointerId);
}
}
@Override
public int getViewHorizontalDragRange(View child) {
return child.getWidth();
}
@Override
public int clampViewPositionHorizontal(View child, int left, int dx) {
if (checkDrawerViewAbsoluteGravity(child, Gravity.LEFT)) {
return Math.max(-child.getWidth(), Math.min(left, 0));
} else {
final int width = getWidth();
return Math.max(width - child.getWidth(), Math.min(left, width));
}
}
@Override
public int clampViewPositionVertical(View child, int top, int dy) {
return child.getTop();
}
}
public static class LayoutParams extends ViewGroup.MarginLayoutParams {
public int gravity = Gravity.NO_GRAVITY;
float onScreen;
boolean isPeeking;
boolean knownOpen;
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
final TypedArray a = c.obtainStyledAttributes(attrs, LAYOUT_ATTRS);
this.gravity = a.getInt(0, Gravity.NO_GRAVITY);
a.recycle();
}
public LayoutParams(int width, int height) {
super(width, height);
}
public LayoutParams(int width, int height, int gravity) {
this(width, height);
this.gravity = gravity;
}
public LayoutParams(LayoutParams source) {
super(source);
this.gravity = source.gravity;
}
public LayoutParams(ViewGroup.LayoutParams source) {
super(source);
}
public LayoutParams(ViewGroup.MarginLayoutParams source) {
super(source);
}
}
class AccessibilityDelegate extends AccessibilityDelegateCompat {
private final Rect mTmpRect = new Rect();
@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
final AccessibilityNodeInfoCompat superNode = AccessibilityNodeInfoCompat.obtain(info);
super.onInitializeAccessibilityNodeInfo(host, superNode);
info.setClassName(DrawerLayout.class.getName());
info.setSource(host);
final ViewParent parent = ViewCompat.getParentForAccessibility(host);
if (parent instanceof View) {
info.setParent((View) parent);
}
copyNodeInfoNoChildren(info, superNode);
superNode.recycle();
addChildrenForAccessibility(info, (ViewGroup) host);
}
@Override
public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(host, event);
event.setClassName(DrawerLayout.class.getName());
}
@Override
public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) {
// Special case to handle window state change events. As far as
// accessibility services are concerned, state changes from
// DrawerLayout invalidate the entire contents of the screen (like
// an Activity or Dialog) and they should announce the title of the
// new content.
if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
final List<CharSequence> eventText = event.getText();
final View visibleDrawer = findVisibleDrawer();
if (visibleDrawer != null) {
final int edgeGravity = getDrawerViewAbsoluteGravity(visibleDrawer);
final CharSequence title = getDrawerTitle(edgeGravity);
if (title != null) {
eventText.add(title);
}
}
return true;
}
return super.dispatchPopulateAccessibilityEvent(host, event);
}
private void addChildrenForAccessibility(AccessibilityNodeInfoCompat info, ViewGroup v) {
final int childCount = v.getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = v.getChildAt(i);
if (filter(child)) {
continue;
}
// Adding children that are marked as not important for
// accessibility will break the hierarchy, so we need to check
// that value and re-parent views if necessary.
final int importance = ViewCompat.getImportantForAccessibility(child);
switch (importance) {
case ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS:
// Always skip NO_HIDE views and their descendants.
break;
case ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_NO:
// Re-parent children of NO view groups, skip NO views.
if (child instanceof ViewGroup) {
addChildrenForAccessibility(info, (ViewGroup) child);
}
break;
case ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO:
// Force AUTO views to YES and add them.
ViewCompat.setImportantForAccessibility(
child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
case ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES:
info.addChild(child);
break;
}
}
}
@Override
public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child,
AccessibilityEvent event) {
if (!filter(child)) {
return super.onRequestSendAccessibilityEvent(host, child, event);
}
return false;
}
public boolean filter(View child) {
final View openDrawer = findOpenDrawer();
return openDrawer != null && openDrawer != child;
}
/**
* This should really be in AccessibilityNodeInfoCompat, but there unfortunately
* seem to be a few elements that are not easily cloneable using the underlying API.
* Leave it private here as it's not general-purpose useful.
*/
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
AccessibilityNodeInfoCompat src) {
final Rect rect = mTmpRect;
src.getBoundsInParent(rect);
dest.setBoundsInParent(rect);
src.getBoundsInScreen(rect);
dest.setBoundsInScreen(rect);
dest.setVisibleToUser(src.isVisibleToUser());
dest.setPackageName(src.getPackageName());
dest.setClassName(src.getClassName());
dest.setContentDescription(src.getContentDescription());
dest.setEnabled(src.isEnabled());
dest.setClickable(src.isClickable());
dest.setFocusable(src.isFocusable());
dest.setFocused(src.isFocused());
dest.setAccessibilityFocused(src.isAccessibilityFocused());
dest.setSelected(src.isSelected());
dest.setLongClickable(src.isLongClickable());
dest.addAction(src.getActions());
}
}
}
Raw
CustomDurationViewDragHelper.java
_/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.levibostian.customdurationnavigationdrawer.widget;
import android.content.Context;
import android.support.v4.view.MotionEventCompat;
import android.support.v4.view.VelocityTrackerCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.ScrollerCompat;
import android.support.v4.widget.ViewDragHelper;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.animation.Interpolator;
import java.util.Arrays;
public class CustomDurationViewDragHelper {
private static final int MAX_SETTLE_DURATION = 0; // ms
private static final String TAG = "ViewDragHelper";
/**
* A null/invalid pointer ID.
*/
public static final int INVALID_POINTER = -1;
/**
* A view is not currently being dragged or animating as a result of a fling/snap.
*/
public static final int STATE_IDLE = 0;
/**
* A view is currently being dragged. The position is currently changing as a result
* of user input or simulated user input.
*/
public static final int STATE_DRAGGING = 1;
/**
* A view is currently settling into place as a result of a fling or
* predefined non-interactive motion.
*/
public static final int STATE_SETTLING = 2;
/**
* Edge flag indicating that the left edge should be affected.
*/
public static final int EDGE_LEFT = 1 << 0;
/**
* Edge flag indicating that the right edge should be affected.
*/
public static final int EDGE_RIGHT = 1 << 1;
/**
* Edge flag indicating that the top edge should be affected.
*/
public static final int EDGE_TOP = 1 << 2;
/**
* Edge flag indicating that the bottom edge should be affected.
*/
public static final int EDGE_BOTTOM = 1 << 3;
/**
* Edge flag set indicating all edges should be affected.
*/
public static final int EDGE_ALL = EDGE_LEFT | EDGE_TOP | EDGE_RIGHT | EDGE_BOTTOM;
/**
* Indicates that a check should occur along the horizontal axis
*/
public static final int DIRECTION_HORIZONTAL = 1 << 0;
/**
* Indicates that a check should occur along the vertical axis
*/
public static final int DIRECTION_VERTICAL = 1 << 1;
/**
* Indicates that a check should occur along all axes
*/
public static final int DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL;
private static final int EDGE_SIZE = 20; // dp
private static final int BASE_SETTLE_DURATION = 256; // ms
// Current drag state; idle, dragging or settling
private int mDragState;
// Distance to travel before a drag may begin
private int mTouchSlop;
// Last known position/pointer tracking
private int mActivePointerId = INVALID_POINTER;
private float[] mInitialMotionX;
private float[] mInitialMotionY;
private float[] mLastMotionX;
private float[] mLastMotionY;
private int[] mInitialEdgesTouched;
private int[] mEdgeDragsInProgress;
private int[] mEdgeDragsLocked;
private int mPointersDown;
private VelocityTracker mVelocityTracker;
private float mMaxVelocity;
private float mMinVelocity;
private int mEdgeSize;
private int mTrackingEdges;
private ScrollerCompat mScroller;
private final Callback mCallback;
private View mCapturedView;
private boolean mReleaseInProgress;
private final ViewGroup mParentView;
/**
* A Callback is used as a communication channel with the ViewDragHelper back to the
* parent view using it. <code>on*</code>methods are invoked on siginficant events and several
* accessor methods are expected to provide the ViewDragHelper with more information
* about the state of the parent view upon request. The callback also makes decisions
* governing the range and draggability of child views.
*/
public static abstract class Callback {
/**
* Called when the drag state changes. See the <code>STATE_*</code> constants
* for more information.
*
* @param state The new drag state
*
* @see #STATE_IDLE
* @see #STATE_DRAGGING
* @see #STATE_SETTLING
*/
public void onViewDragStateChanged(int state) {}
/**
* Called when the captured view's position changes as the result of a drag or settle.
*
* @param changedView View whose position changed
* @param left New X coordinate of the left edge of the view
* @param top New Y coordinate of the top edge of the view
* @param dx Change in X position from the last call
* @param dy Change in Y position from the last call
*/
public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) {}
/**
* Called when a child view is captured for dragging or settling. The ID of the pointer
* currently dragging the captured view is supplied. If activePointerId is
* identified as {@link #INVALID_POINTER} the capture is programmatic instead of
* pointer-initiated.
*
* @param capturedChild Child view that was captured
* @param activePointerId Pointer id tracking the child capture
*/
public void onViewCaptured(View capturedChild, int activePointerId) {}
/**
* Called when the child view is no longer being actively dragged.
* The fling velocity is also supplied, if relevant. The velocity values may
* be clamped to system minimums or maximums.
*
* <p>Calling code may decide to fling or otherwise release the view to let it
* settle into place. It should do so using {@link #settleCapturedViewAt(int, int)}
* or {@link #flingCapturedView(int, int, int, int)}. If the Callback invokes
* one of these methods, the ViewDragHelper will enter {@link #STATE_SETTLING}
* and the view capture will not fully end until it comes to a complete stop.
* If neither of these methods is invoked before <code>onViewReleased</code> returns,
* the view will stop in place and the ViewDragHelper will return to
* {@link #STATE_IDLE}.</p>
*
* @param releasedChild The captured child view now being released
* @param xvel X velocity of the pointer as it left the screen in pixels per second.
* @param yvel Y velocity of the pointer as it left the screen in pixels per second.
*/
public void onViewReleased(View releasedChild, float xvel, float yvel) {}
/**
* Called when one of the subscribed edges in the parent view has been touched
* by the user while no child view is currently captured.
*
* @param edgeFlags A combination of edge flags describing the edge(s) currently touched
* @param pointerId ID of the pointer touching the described edge(s)
* @see #EDGE_LEFT
* @see #EDGE_TOP
* @see #EDGE_RIGHT
* @see #EDGE_BOTTOM
*/
public void onEdgeTouched(int edgeFlags, int pointerId) {}
/**
* Called when the given edge may become locked. This can happen if an edge drag
* was preliminarily rejected before beginning, but after {@link #onEdgeTouched(int, int)}
* was called. This method should return true to lock this edge or false to leave it
* unlocked. The default behavior is to leave edges unlocked.
*
* @param edgeFlags A combination of edge flags describing the edge(s) locked
* @return true to lock the edge, false to leave it unlocked
*/
public boolean onEdgeLock(int edgeFlags) {
return false;
}
/**
* Called when the user has started a deliberate drag away from one
* of the subscribed edges in the parent view while no child view is currently captured.
*
* @param edgeFlags A combination of edge flags describing the edge(s) dragged
* @param pointerId ID of the pointer touching the described edge(s)
* @see #EDGE_LEFT
* @see #EDGE_TOP
* @see #EDGE_RIGHT
* @see #EDGE_BOTTOM
*/
public void onEdgeDragStarted(int edgeFlags, int pointerId) {}
/**
* Called to determine the Z-order of child views.
*
* @param index the ordered position to query for
* @return index of the view that should be ordered at position <code>index</code>
*/
public int getOrderedChildIndex(int index) {
return index;
}
/**
* Return the magnitude of a draggable child view's horizontal range of motion in pixels.
* This method should return 0 for views that cannot move horizontally.
*
* @param child Child view to check
* @return range of horizontal motion in pixels
*/
public int getViewHorizontalDragRange(View child) {
return 0;
}
/**
* Return the magnitude of a draggable child view's vertical range of motion in pixels.
* This method should return 0 for views that cannot move vertically.
*
* @param child Child view to check
* @return range of vertical motion in pixels
*/
public int getViewVerticalDragRange(View child) {
return 0;
}
/**
* Called when the user's input indicates that they want to capture the given child view
* with the pointer indicated by pointerId. The callback should return true if the user
* is permitted to drag the given view with the indicated pointer.
*
* <p>ViewDragHelper may call this method multiple times for the same view even if
* the view is already captured; this indicates that a new pointer is trying to take
* control of the view.</p>
*
* <p>If this method returns true, a call to {@link #onViewCaptured(android.view.View, int)}
* will follow if the capture is successful.</p>
*
* @param child Child the user is attempting to capture
* @param pointerId ID of the pointer attempting the capture
* @return true if capture should be allowed, false otherwise
*/
public abstract boolean tryCaptureView(View child, int pointerId);
/**
* Restrict the motion of the dragged child view along the horizontal axis.
* The default implementation does not allow horizontal motion; the extending
* class must override this method and provide the desired clamping.
*
*
* @param child Child view being dragged
* @param left Attempted motion along the X axis
* @param dx Proposed change in position for left
* @return The new clamped position for left
*/
public int clampViewPositionHorizontal(View child, int left, int dx) {
return 0;
}
/**
* Restrict the motion of the dragged child view along the vertical axis.
* The default implementation does not allow vertical motion; the extending
* class must override this method and provide the desired clamping.
*
*
* @param child Child view being dragged
* @param top Attempted motion along the Y axis
* @param dy Proposed change in position for top
* @return The new clamped position for top
*/
public int clampViewPositionVertical(View child, int top, int dy) {
return 0;
}
}
/**
* Interpolator defining the animation curve for mScroller
*/
private static final Interpolator sInterpolator = new Interpolator() {
public float getInterpolation(float t) {
t -= 1.0f;
return t * t * t * t * t + 1.0f;
}
};
private final Runnable mSetIdleRunnable = new Runnable() {
public void run() {
setDragState(STATE_IDLE);
}
};
/**
* Factory method to create a new ViewDragHelper.
*
* @param forParent Parent view to monitor
* @param cb Callback to provide information and receive events
* @return a new ViewDragHelper instance
*/
public static CustomDurationViewDragHelper create(ViewGroup forParent, Callback cb) {
return new CustomDurationViewDragHelper(forParent.getContext(), forParent, cb);
}
/**
* Factory method to create a new ViewDragHelper.
*
* @param forParent Parent view to monitor
* @param sensitivity Multiplier for how sensitive the helper should be about detecting
* the start of a drag. Larger values are more sensitive. 1.0f is normal.
* @param cb Callback to provide information and receive events
* @return a new ViewDragHelper instance
*/
public static CustomDurationViewDragHelper create(ViewGroup forParent, float sensitivity, Callback cb) {
final CustomDurationViewDragHelper helper = create(forParent, cb);
helper.mTouchSlop = (int) (helper.mTouchSlop * (1 / sensitivity));
return helper;
}
/**
* Apps should use ViewDragHelper.create() to get a new instance.
* This will allow VDH to use internal compatibility implementations for different
* platform versions.
*
* @param context Context to initialize config-dependent params from
* @param forParent Parent view to monitor
*/
private CustomDurationViewDragHelper(Context context, ViewGroup forParent, Callback cb) {
if (forParent == null) {
throw new IllegalArgumentException("Parent view may not be null");
}
if (cb == null) {
throw new IllegalArgumentException("Callback may not be null");
}
mParentView = forParent;
mCallback = cb;
final ViewConfiguration vc = ViewConfiguration.get(context);
final float density = context.getResources().getDisplayMetrics().density;
mEdgeSize = (int) (EDGE_SIZE * density + 0.5f);
mTouchSlop = vc.getScaledTouchSlop();
mMaxVelocity = vc.getScaledMaximumFlingVelocity();
mMinVelocity = vc.getScaledMinimumFlingVelocity();
mScroller = ScrollerCompat.create(context, sInterpolator);
}
/**
* Set the minimum velocity that will be detected as having a magnitude greater than zero
* in pixels per second. Callback methods accepting a velocity will be clamped appropriately.
*
* @param minVel Minimum velocity to detect
*/
public void setMinVelocity(float minVel) {
mMinVelocity = minVel;
}
/**
* Return the currently configured minimum velocity. Any flings with a magnitude less
* than this value in pixels per second. Callback methods accepting a velocity will receive
* zero as a velocity value if the real detected velocity was below this threshold.
*
* @return the minimum velocity that will be detected
*/
public float getMinVelocity() {
return mMinVelocity;
}
/**
* Retrieve the current drag state of this helper. This will return one of
* {@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}.
* @return The current drag state
*/
public int getViewDragState() {
return mDragState;
}
/**
* Enable edge tracking for the selected edges of the parent view.
* The callback's {@link Callback#onEdgeTouched(int, int)} and
* {@link Callback#onEdgeDragStarted(int, int)} methods will only be invoked
* for edges for which edge tracking has been enabled.
*
* @param edgeFlags Combination of edge flags describing the edges to watch
* @see #EDGE_LEFT
* @see #EDGE_TOP
* @see #EDGE_RIGHT
* @see #EDGE_BOTTOM
*/
public void setEdgeTrackingEnabled(int edgeFlags) {
mTrackingEdges = edgeFlags;
}
/**
* Return the size of an edge. This is the range in pixels along the edges of this view
* that will actively detect edge touches or drags if edge tracking is enabled.
*
* @return The size of an edge in pixels
* @see #setEdgeTrackingEnabled(int)
*/
public int getEdgeSize() {
return mEdgeSize;
}
/**
* Capture a specific child view for dragging within the parent. The callback will be notified
* but {@link Callback#tryCaptureView(android.view.View, int)} will not be asked permission to
* capture this view.
*
* @param childView Child view to capture
* @param activePointerId ID of the pointer that is dragging the captured child view
*/
public void captureChildView(View childView, int activePointerId) {
if (childView.getParent() != mParentView) {
throw new IllegalArgumentException("captureChildView: parameter must be a descendant " +
"of the ViewDragHelper's tracked parent view (" + mParentView + ")");
}
mCapturedView = childView;
mActivePointerId = activePointerId;
mCallback.onViewCaptured(childView, activePointerId);
setDragState(STATE_DRAGGING);
}
/**
* @return The currently captured view, or null if no view has been captured.
*/
public View getCapturedView() {
return mCapturedView;
}
/**
* @return The ID of the pointer currently dragging the captured view,
* or {@link #INVALID_POINTER}.
*/
public int getActivePointerId() {
return mActivePointerId;
}
/**
* @return The minimum distance in pixels that the user must travel to initiate a drag
*/
public int getTouchSlop() {
return mTouchSlop;
}
/**
* The result of a call to this method is equivalent to
* {@link #processTouchEvent(android.view.MotionEvent)} receiving an ACTION_CANCEL event.
*/
public void cancel() {
mActivePointerId = INVALID_POINTER;
clearMotionHistory();
if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
}
/**
* {@link #cancel()}, but also abort all motion in progress and snap to the end of any
* animation.
*/
public void abort() {
cancel();
if (mDragState == STATE_SETTLING) {
final int oldX = mScroller.getCurrX();
final int oldY = mScroller.getCurrY();
mScroller.abortAnimation();
final int newX = mScroller.getCurrX();
final int newY = mScroller.getCurrY();
mCallback.onViewPositionChanged(mCapturedView, newX, newY, newX - oldX, newY - oldY);
}
setDragState(STATE_IDLE);
}
/**
* Animate the view <code>child</code> to the given (left, top) position.
* If this method returns true, the caller should invoke {@link #continueSettling(boolean)}
* on each subsequent frame to continue the motion until it returns false. If this method
* returns false there is no further work to do to complete the movement.
*
* <p>This operation does not count as a capture event, though {@link #getCapturedView()}
* will still report the sliding view while the slide is in progress.</p>
*
* @param child Child view to capture and animate
* @param finalLeft Final left position of child
* @param finalTop Final top position of child
* @return true if animation should continue through {@link #continueSettling(boolean)} calls
*/
public boolean smoothSlideViewTo(View child, int finalLeft, int finalTop) {
mCapturedView = child;
mActivePointerId = INVALID_POINTER;
return forceSettleCapturedViewAt(finalLeft, finalTop, 0, 0);
}
/**
* Settle the captured view at the given (left, top) position.
* The appropriate velocity from prior motion will be taken into account.
* If this method returns true, the caller should invoke {@link #continueSettling(boolean)}
* on each subsequent frame to continue the motion until it returns false. If this method
* returns false there is no further work to do to complete the movement.
*
* @param finalLeft Settled left edge position for the captured view
* @param finalTop Settled top edge position for the captured view
* @return true if animation should continue through {@link #continueSettling(boolean)} calls
*/
public boolean settleCapturedViewAt(int finalLeft, int finalTop) {
if (!mReleaseInProgress) {
throw new IllegalStateException("Cannot settleCapturedViewAt outside of a call to " +
"Callback#onViewReleased");
}
return forceSettleCapturedViewAt(finalLeft, finalTop,
(int) VelocityTrackerCompat.getXVelocity(mVelocityTracker, mActivePointerId),
(int) VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId));
}
/**
* Settle the captured view at the given (left, top) position.
*
* @param finalLeft Target left position for the captured view
* @param finalTop Target top position for the captured view
* @param xvel Horizontal velocity
* @param yvel Vertical velocity
* @return true if animation should continue through {@link #continueSettling(boolean)} calls
*/
private boolean forceSettleCapturedViewAt(int finalLeft, int finalTop, int xvel, int yvel) {
final int startLeft = mCapturedView.getLeft();
final int startTop = mCapturedView.getTop();
final int dx = finalLeft - startLeft;
final int dy = finalTop - startTop;
if (dx == 0 && dy == 0) {
// Nothing to do. Send callbacks, be done.
mScroller.abortAnimation();
setDragState(STATE_IDLE);
return false;
}
final int duration = computeSettleDuration(mCapturedView, dx, dy, xvel, yvel);
mScroller.startScroll(startLeft, startTop, dx, dy, duration);
setDragState(STATE_SETTLING);
return true;
}
private int computeSettleDuration(View child, int dx, int dy, int xvel, int yvel) {
xvel = clampMag(xvel, (int) mMinVelocity, (int) mMaxVelocity);
yvel = clampMag(yvel, (int) mMinVelocity, (int) mMaxVelocity);
final int absDx = Math.abs(dx);
final int absDy = Math.abs(dy);
final int absXVel = Math.abs(xvel);
final int absYVel = Math.abs(yvel);
final int addedVel = absXVel + absYVel;
final int addedDistance = absDx + absDy;
final float xweight = xvel != 0 ? (float) absXVel / addedVel :
(float) absDx / addedDistance;
final float yweight = yvel != 0 ? (float) absYVel / addedVel :
(float) absDy / addedDistance;
int xduration = computeAxisDuration(dx, xvel, mCallback.getViewHorizontalDragRange(child));
int yduration = computeAxisDuration(dy, yvel, mCallback.getViewVerticalDragRange(child));
return (int) (xduration * xweight + yduration * yweight);
}
private int computeAxisDuration(int delta, int velocity, int motionRange) {
if (delta == 0) {
return 0;
}
final int width = mParentView.getWidth();
final int halfWidth = width / 2;
final float distanceRatio = Math.min(1f, (float) Math.abs(delta) / width);
final float distance = halfWidth + halfWidth *
distanceInfluenceForSnapDuration(distanceRatio);
int duration;
velocity = Math.abs(velocity);
if (velocity > 0) {
duration = 4 * Math.round(1000 * Math.abs(distance / velocity));
} else {
final float range = (float) Math.abs(delta) / motionRange;
duration = (int) ((range + 1) * BASE_SETTLE_DURATION);
}
return Math.min(duration, MAX_SETTLE_DURATION);
}
/**
* Clamp the magnitude of value for absMin and absMax.
* If the value is below the minimum, it will be clamped to zero.
* If the value is above the maximum, it will be clamped to the maximum.
*
* @param value Value to clamp
* @param absMin Absolute value of the minimum significant value to return
* @param absMax Absolute value of the maximum value to return
* @return The clamped value with the same sign as <code>value</code>
*/
private int clampMag(int value, int absMin, int absMax) {
final int absValue = Math.abs(value);
if (absValue < absMin) return 0;
if (absValue > absMax) return value > 0 ? absMax : -absMax;
return value;
}
/**
* Clamp the magnitude of value for absMin and absMax.
* If the value is below the minimum, it will be clamped to zero.
* If the value is above the maximum, it will be clamped to the maximum.
*
* @param value Value to clamp
* @param absMin Absolute value of the minimum significant value to return
* @param absMax Absolute value of the maximum value to return
* @return The clamped value with the same sign as <code>value</code>
*/
private float clampMag(float value, float absMin, float absMax) {
final float absValue = Math.abs(value);
if (absValue < absMin) return 0;
if (absValue > absMax) return value > 0 ? absMax : -absMax;
return value;
}
private float distanceInfluenceForSnapDuration(float f) {
f -= 0.5f; // center the values about 0.
f *= 0.3f * Math.PI / 2.0f;
return (float) Math.sin(f);
}
/**
* Settle the captured view based on standard free-moving fling behavior.
* The caller should invoke {@link #continueSettling(boolean)} on each subsequent frame
* to continue the motion until it returns false.
*
* @param minLeft Minimum X position for the view's left edge
* @param minTop Minimum Y position for the view's top edge
* @param maxLeft Maximum X position for the view's left edge
* @param maxTop Maximum Y position for the view's top edge
*/
public void flingCapturedView(int minLeft, int minTop, int maxLeft, int maxTop) {
if (!mReleaseInProgress) {
throw new IllegalStateException("Cannot flingCapturedView outside of a call to " +
"Callback#onViewReleased");
}
mScroller.fling(mCapturedView.getLeft(), mCapturedView.getTop(),
(int) VelocityTrackerCompat.getXVelocity(mVelocityTracker, mActivePointerId),
(int) VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId),
minLeft, maxLeft, minTop, maxTop);
setDragState(STATE_SETTLING);
}
/**
* Move the captured settling view by the appropriate amount for the current time.
* If <code>continueSettling</code> returns true, the caller should call it again
* on the next frame to continue.
*
* @param deferCallbacks true if state callbacks should be deferred via posted message.
* Set this to true if you are calling this method from
* {@link android.view.View#computeScroll()} or similar methods
* invoked as part of layout or drawing.
* @return true if settle is still in progress
*/
public boolean continueSettling(boolean deferCallbacks) {
if (mDragState == STATE_SETTLING) {
boolean keepGoing = mScroller.computeScrollOffset();
final int x = mScroller.getCurrX();
final int y = mScroller.getCurrY();
final int dx = x - mCapturedView.getLeft();
final int dy = y - mCapturedView.getTop();
if (dx != 0) {
mCapturedView.offsetLeftAndRight(dx);
}
if (dy != 0) {
mCapturedView.offsetTopAndBottom(dy);
}
if (dx != 0 || dy != 0) {
mCallback.onViewPositionChanged(mCapturedView, x, y, dx, dy);
}
if (keepGoing && x == mScroller.getFinalX() && y == mScroller.getFinalY()) {
// Close enough. The interpolator/scroller might think we're still moving
// but the user sure doesn't.
mScroller.abortAnimation();
keepGoing = mScroller.isFinished();
}
if (!keepGoing) {
if (deferCallbacks) {
mParentView.post(mSetIdleRunnable);
} else {
setDragState(STATE_IDLE);
}
}
}
return mDragState == STATE_SETTLING;
}
/**
* Like all callback events this must happen on the UI thread, but release
* involves some extra semantics. During a release (mReleaseInProgress)
* is the only time it is valid to call {@link #settleCapturedViewAt(int, int)}
* or {@link #flingCapturedView(int, int, int, int)}.
*/
private void dispatchViewReleased(float xvel, float yvel) {
mReleaseInProgress = true;
mCallback.onViewReleased(mCapturedView, xvel, yvel);
mReleaseInProgress = false;
if (mDragState == STATE_DRAGGING) {
// onViewReleased didn't call a method that would have changed this. Go idle.
setDragState(STATE_IDLE);
}
}
private void clearMotionHistory() {
if (mInitialMotionX == null) {
return;
}
Arrays.fill(mInitialMotionX, 0);
Arrays.fill(mInitialMotionY, 0);
Arrays.fill(mLastMotionX, 0);
Arrays.fill(mLastMotionY, 0);
Arrays.fill(mInitialEdgesTouched, 0);
Arrays.fill(mEdgeDragsInProgress, 0);
Arrays.fill(mEdgeDragsLocked, 0);
mPointersDown = 0;
}
private void clearMotionHistory(int pointerId) {
if (mInitialMotionX == null) {
return;
}
mInitialMotionX[pointerId] = 0;
mInitialMotionY[pointerId] = 0;
mLastMotionX[pointerId] = 0;
mLastMotionY[pointerId] = 0;
mInitialEdgesTouched[pointerId] = 0;
mEdgeDragsInProgress[pointerId] = 0;
mEdgeDragsLocked[pointerId] = 0;
mPointersDown &= ~(1 << pointerId);
}
private void ensureMotionHistorySizeForId(int pointerId) {
if (mInitialMotionX == null || mInitialMotionX.length <= pointerId) {
float[] imx = new float[pointerId + 1];
float[] imy = new float[pointerId + 1];
float[] lmx = new float[pointerId + 1];
float[] lmy = new float[pointerId + 1];
int[] iit = new int[pointerId + 1];
int[] edip = new int[pointerId + 1];
int[] edl = new int[pointerId + 1];
if (mInitialMotionX != null) {
System.arraycopy(mInitialMotionX, 0, imx, 0, mInitialMotionX.length);
System.arraycopy(mInitialMotionY, 0, imy, 0, mInitialMotionY.length);
System.arraycopy(mLastMotionX, 0, lmx, 0, mLastMotionX.length);
System.arraycopy(mLastMotionY, 0, lmy, 0, mLastMotionY.length);
System.arraycopy(mInitialEdgesTouched, 0, iit, 0, mInitialEdgesTouched.length);
System.arraycopy(mEdgeDragsInProgress, 0, edip, 0, mEdgeDragsInProgress.length);
System.arraycopy(mEdgeDragsLocked, 0, edl, 0, mEdgeDragsLocked.length);
}
mInitialMotionX = imx;
mInitialMotionY = imy;
mLastMotionX = lmx;
mLastMotionY = lmy;
mInitialEdgesTouched = iit;
mEdgeDragsInProgress = edip;
mEdgeDragsLocked = edl;
}
}
private void saveInitialMotion(float x, float y, int pointerId) {
ensureMotionHistorySizeForId(pointerId);
mInitialMotionX[pointerId] = mLastMotionX[pointerId] = x;
mInitialMotionY[pointerId] = mLastMotionY[pointerId] = y;
mInitialEdgesTouched[pointerId] = getEdgesTouched((int) x, (int) y);
mPointersDown |= 1 << pointerId;
}
private void saveLastMotion(MotionEvent ev) {
final int pointerCount = MotionEventCompat.getPointerCount(ev);
for (int i = 0; i < pointerCount; i++) {
final int pointerId = MotionEventCompat.getPointerId(ev, i);
final float x = MotionEventCompat.getX(ev, i);
final float y = MotionEventCompat.getY(ev, i);
mLastMotionX[pointerId] = x;
mLastMotionY[pointerId] = y;
}
}
/**
* Check if the given pointer ID represents a pointer that is currently down (to the best
* of the ViewDragHelper's knowledge).
*
* <p>The state used to report this information is populated by the methods
* {@link #shouldInterceptTouchEvent(android.view.MotionEvent)} or
* {@link #processTouchEvent(android.view.MotionEvent)}. If one of these methods has not
* been called for all relevant MotionEvents to track, the information reported
* by this method may be stale or incorrect.</p>
*
* @param pointerId pointer ID to check; corresponds to IDs provided by MotionEvent
* @return true if the pointer with the given ID is still down
*/
public boolean isPointerDown(int pointerId) {
return (mPointersDown & 1 << pointerId) != 0;
}
void setDragState(int state) {
if (mDragState != state) {
mDragState = state;
mCallback.onViewDragStateChanged(state);
if (state == STATE_IDLE) {
mCapturedView = null;
}
}
}
/**
* Attempt to capture the view with the given pointer ID. The callback will be involved.
* This will put us into the "dragging" state. If we've already captured this view with
* this pointer this method will immediately return true without consulting the callback.
*
* @param toCapture View to capture
* @param pointerId Pointer to capture with
* @return true if capture was successful
*/
boolean tryCaptureViewForDrag(View toCapture, int pointerId) {
if (toCapture == mCapturedView && mActivePointerId == pointerId) {
// Already done!
return true;
}
if (toCapture != null && mCallback.tryCaptureView(toCapture, pointerId)) {
mActivePointerId = pointerId;
captureChildView(toCapture, pointerId);
return true;
}
return false;
}
/**
* Tests scrollability within child views of v given a delta of dx.
*
* @param v View to test for horizontal scrollability
* @param checkV Whether the view v passed should itself be checked for scrollability (true),
* or just its children (false).
* @param dx Delta scrolled in pixels along the X axis
* @param dy Delta scrolled in pixels along the Y axis
* @param x X coordinate of the active touch point
* @param y Y coordinate of the active touch point
* @return true if child views of v can be scrolled by delta of dx.
*/
protected boolean canScroll(View v, boolean checkV, int dx, int dy, int x, int y) {
if (v instanceof ViewGroup) {
final ViewGroup group = (ViewGroup) v;
final int scrollX = v.getScrollX();
final int scrollY = v.getScrollY();
final int count = group.getChildCount();
// Count backwards - let topmost views consume scroll distance first.
for (int i = count - 1; i >= 0; i--) {
// TODO: Add versioned support here for transformed views.
// This will not work for transformed views in Honeycomb+
final View child = group.getChildAt(i);
if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight() &&
y + scrollY >= child.getTop() && y + scrollY < child.getBottom() &&
canScroll(child, true, dx, dy, x + scrollX - child.getLeft(),
y + scrollY - child.getTop())) {
return true;
}
}
}
return checkV && (ViewCompat.canScrollHorizontally(v, -dx) ||
ViewCompat.canScrollVertically(v, -dy));
}
/**
* Check if this event as provided to the parent view's onInterceptTouchEvent should
* cause the parent to intercept the touch event stream.
*
* @param ev MotionEvent provided to onInterceptTouchEvent
* @return true if the parent view should return true from onInterceptTouchEvent
*/
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
final int action = MotionEventCompat.getActionMasked(ev);
final int actionIndex = MotionEventCompat.getActionIndex(ev);
if (action == MotionEvent.ACTION_DOWN) {
// Reset things for a new event stream, just in case we didn't get
// the whole previous stream.
cancel();
}
if (mVelocityTracker == null) {
mVelocityTracker = VelocityTracker.obtain();
}
mVelocityTracker.addMovement(ev);
switch (action) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();
final int pointerId = MotionEventCompat.getPointerId(ev, 0);
saveInitialMotion(x, y, pointerId);
final View toCapture = findTopChildUnder((int) x, (int) y);
// Catch a settling view if possible.
if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
tryCaptureViewForDrag(toCapture, pointerId);
}
final int edgesTouched = mInitialEdgesTouched[pointerId];
if ((edgesTouched & mTrackingEdges) != 0) {
mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
}
break;
}
case MotionEventCompat.ACTION_POINTER_DOWN: {
final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
final float x = MotionEventCompat.getX(ev, actionIndex);
final float y = MotionEventCompat.getY(ev, actionIndex);
saveInitialMotion(x, y, pointerId);
// A ViewDragHelper can only manipulate one view at a time.
if (mDragState == STATE_IDLE) {
final int edgesTouched = mInitialEdgesTouched[pointerId];
if ((edgesTouched & mTrackingEdges) != 0) {
mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
}
} else if (mDragState == STATE_SETTLING) {
// Catch a settling view if possible.
final View toCapture = findTopChildUnder((int) x, (int) y);
if (toCapture == mCapturedView) {
tryCaptureViewForDrag(toCapture, pointerId);
}
}
break;
}
case MotionEvent.ACTION_MOVE: {
// First to cross a touch slop over a draggable view wins. Also report edge drags.
final int pointerCount = MotionEventCompat.getPointerCount(ev);
for (int i = 0; i < pointerCount; i++) {
final int pointerId = MotionEventCompat.getPointerId(ev, i);
final float x = MotionEventCompat.getX(ev, i);
final float y = MotionEventCompat.getY(ev, i);
final float dx = x - mInitialMotionX[pointerId];
final float dy = y - mInitialMotionY[pointerId];
reportNewEdgeDrags(dx, dy, pointerId);
if (mDragState == STATE_DRAGGING) {
// Callback might have started an edge drag
break;
}
final View toCapture = findTopChildUnder((int) x, (int) y);
if (toCapture != null && checkTouchSlop(toCapture, dx, dy) &&
tryCaptureViewForDrag(toCapture, pointerId)) {
break;
}
}
saveLastMotion(ev);
break;
}
case MotionEventCompat.ACTION_POINTER_UP: {
final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
clearMotionHistory(pointerId);
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL: {
cancel();
break;
}
}
return mDragState == STATE_DRAGGING;
}
/**
* Process a touch event received by the parent view. This method will dispatch callback events
* as needed before returning. The parent view's onTouchEvent implementation should call this.
*
* @param ev The touch event received by the parent view
*/
public void processTouchEvent(MotionEvent ev) {
final int action = MotionEventCompat.getActionMasked(ev);
final int actionIndex = MotionEventCompat.getActionIndex(ev);
if (action == MotionEvent.ACTION_DOWN) {
// Reset things for a new event stream, just in case we didn't get
// the whole previous stream.
cancel();
}
if (mVelocityTracker == null) {
mVelocityTracker = VelocityTracker.obtain();
}
mVelocityTracker.addMovement(ev);
switch (action) {
case MotionEvent.ACTION_DOWN: {
final float x = ev.getX();
final float y = ev.getY();
final int pointerId = MotionEventCompat.getPointerId(ev, 0);
final View toCapture = findTopChildUnder((int) x, (int) y);
saveInitialMotion(x, y, pointerId);
// Since the parent is already directly processing this touch event,
// there is no reason to delay for a slop before dragging.
// Start immediately if possible.
tryCaptureViewForDrag(toCapture, pointerId);
final int edgesTouched = mInitialEdgesTouched[pointerId];
if ((edgesTouched & mTrackingEdges) != 0) {
mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
}
break;
}
case MotionEventCompat.ACTION_POINTER_DOWN: {
final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
final float x = MotionEventCompat.getX(ev, actionIndex);
final float y = MotionEventCompat.getY(ev, actionIndex);
saveInitialMotion(x, y, pointerId);
// A ViewDragHelper can only manipulate one view at a time.
if (mDragState == STATE_IDLE) {
// If we're idle we can do anything! Treat it like a normal down event.
final View toCapture = findTopChildUnder((int) x, (int) y);
tryCaptureViewForDrag(toCapture, pointerId);
final int edgesTouched = mInitialEdgesTouched[pointerId];
if ((edgesTouched & mTrackingEdges) != 0) {
mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
}
} else if (isCapturedViewUnder((int) x, (int) y)) {
// We're still tracking a captured view. If the same view is under this
// point, we'll swap to controlling it with this pointer instead.
// (This will still work if we're "catching" a settling view.)
tryCaptureViewForDrag(mCapturedView, pointerId);
}
break;
}
case MotionEvent.ACTION_MOVE: {
if (mDragState == STATE_DRAGGING) {
final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
final float x = MotionEventCompat.getX(ev, index);
final float y = MotionEventCompat.getY(ev, index);
final int idx = (int) (x - mLastMotionX[mActivePointerId]);
final int idy = (int) (y - mLastMotionY[mActivePointerId]);
dragTo(mCapturedView.getLeft() + idx, mCapturedView.getTop() + idy, idx, idy);
saveLastMotion(ev);
} else {
// Check to see if any pointer is now over a draggable view.
final int pointerCount = MotionEventCompat.getPointerCount(ev);
for (int i = 0; i < pointerCount; i++) {
final int pointerId = MotionEventCompat.getPointerId(ev, i);
final float x = MotionEventCompat.getX(ev, i);
final float y = MotionEventCompat.getY(ev, i);
final float dx = x - mInitialMotionX[pointerId];
final float dy = y - mInitialMotionY[pointerId];
reportNewEdgeDrags(dx, dy, pointerId);
if (mDragState == STATE_DRAGGING) {
// Callback might have started an edge drag.
break;
}
final View toCapture = findTopChildUnder((int) x, (int) y);
if (checkTouchSlop(toCapture, dx, dy) &&
tryCaptureViewForDrag(toCapture, pointerId)) {
break;
}
}
saveLastMotion(ev);
}
break;
}
case MotionEventCompat.ACTION_POINTER_UP: {
final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
if (mDragState == STATE_DRAGGING && pointerId == mActivePointerId) {
// Try to find another pointer that's still holding on to the captured view.
int newActivePointer = INVALID_POINTER;
final int pointerCount = MotionEventCompat.getPointerCount(ev);
for (int i = 0; i < pointerCount; i++) {
final int id = MotionEventCompat.getPointerId(ev, i);
if (id == mActivePointerId) {
// This one's going away, skip.
continue;
}
final float x = MotionEventCompat.getX(ev, i);
final float y = MotionEventCompat.getY(ev, i);
if (findTopChildUnder((int) x, (int) y) == mCapturedView &&
tryCaptureViewForDrag(mCapturedView, id)) {
newActivePointer = mActivePointerId;
break;
}
}
if (newActivePointer == INVALID_POINTER) {
// We didn't find another pointer still touching the view, release it.
releaseViewForPointerUp();
}
}
clearMotionHistory(pointerId);
break;
}
case MotionEvent.ACTION_UP: {
if (mDragState == STATE_DRAGGING) {
releaseViewForPointerUp();
}
cancel();
break;
}
case MotionEvent.ACTION_CANCEL: {
if (mDragState == STATE_DRAGGING) {
dispatchViewReleased(0, 0);
}
cancel();
break;
}
}
}
private void reportNewEdgeDrags(float dx, float dy, int pointerId) {
int dragsStarted = 0;
if (checkNewEdgeDrag(dx, dy, pointerId, EDGE_LEFT)) {
dragsStarted |= EDGE_LEFT;
}
if (checkNewEdgeDrag(dy, dx, pointerId, EDGE_TOP)) {
dragsStarted |= EDGE_TOP;
}
if (checkNewEdgeDrag(dx, dy, pointerId, EDGE_RIGHT)) {
dragsStarted |= EDGE_RIGHT;
}
if (checkNewEdgeDrag(dy, dx, pointerId, EDGE_BOTTOM)) {
dragsStarted |= EDGE_BOTTOM;
}
if (dragsStarted != 0) {
mEdgeDragsInProgress[pointerId] |= dragsStarted;
mCallback.onEdgeDragStarted(dragsStarted, pointerId);
}
}
private boolean checkNewEdgeDrag(float delta, float odelta, int pointerId, int edge) {
final float absDelta = Math.abs(delta);
final float absODelta = Math.abs(odelta);
if ((mInitialEdgesTouched[pointerId] & edge) != edge || (mTrackingEdges & edge) == 0 ||
(mEdgeDragsLocked[pointerId] & edge) == edge ||
(mEdgeDragsInProgress[pointerId] & edge) == edge ||
(absDelta <= mTouchSlop && absODelta <= mTouchSlop)) {
return false;
}
if (absDelta < absODelta * 0.5f && mCallback.onEdgeLock(edge)) {
mEdgeDragsLocked[pointerId] |= edge;
return false;
}
return (mEdgeDragsInProgress[pointerId] & edge) == 0 && absDelta > mTouchSlop;
}
/**
* Check if we've crossed a reasonable touch slop for the given child view.
* If the child cannot be dragged along the horizontal or vertical axis, motion
* along that axis will not count toward the slop check.
*
* @param child Child to check
* @param dx Motion since initial position along X axis
* @param dy Motion since initial position along Y axis
* @return true if the touch slop has been crossed
*/
private boolean checkTouchSlop(View child, float dx, float dy) {
if (child == null) {
return false;
}
final boolean checkHorizontal = mCallback.getViewHorizontalDragRange(child) > 0;
final boolean checkVertical = mCallback.getViewVerticalDragRange(child) > 0;
if (checkHorizontal && checkVertical) {
return dx * dx + dy * dy > mTouchSlop * mTouchSlop;
} else if (checkHorizontal) {
return Math.abs(dx) > mTouchSlop;
} else if (checkVertical) {
return Math.abs(dy) > mTouchSlop;
}
return false;
}
/**
* Check if any pointer tracked in the current gesture has crossed
* the required slop threshold.
*
* <p>This depends on internal state populated by
* {@link #shouldInterceptTouchEvent(android.view.MotionEvent)} or
* {@link #processTouchEvent(android.view.MotionEvent)}. You should only rely on
* the results of this method after all currently available touch data
* has been provided to one of these two methods.</p>
*
* @param directions Combination of direction flags, see {@link #DIRECTION_HORIZONTAL},
* {@link #DIRECTION_VERTICAL}, {@link #DIRECTION_ALL}
* @return true if the slop threshold has been crossed, false otherwise
*/
public boolean checkTouchSlop(int directions) {
final int count = mInitialMotionX.length;
for (int i = 0; i < count; i++) {
if (checkTouchSlop(directions, i)) {
return true;
}
}
return false;
}
/**
* Check if the specified pointer tracked in the current gesture has crossed
* the required slop threshold.
*
* <p>This depends on internal state populated by
* {@link #shouldInterceptTouchEvent(android.view.MotionEvent)} or
* {@link #processTouchEvent(android.view.MotionEvent)}. You should only rely on
* the results of this method after all currently available touch data
* has been provided to one of these two methods.</p>
*
* @param directions Combination of direction flags, see {@link #DIRECTION_HORIZONTAL},
* {@link #DIRECTION_VERTICAL}, {@link #DIRECTION_ALL}
* @param pointerId ID of the pointer to slop check as specified by MotionEvent
* @return true if the slop threshold has been crossed, false otherwise
*/
public boolean checkTouchSlop(int directions, int pointerId) {
if (!isPointerDown(pointerId)) {
return false;
}
final boolean checkHorizontal = (directions & DIRECTION_HORIZONTAL) == DIRECTION_HORIZONTAL;
final boolean checkVertical = (directions & DIRECTION_VERTICAL) == DIRECTION_VERTICAL;
final float dx = mLastMotionX[pointerId] - mInitialMotionX[pointerId];
final float dy = mLastMotionY[pointerId] - mInitialMotionY[pointerId];
if (checkHorizontal && checkVertical) {
return dx * dx + dy * dy > mTouchSlop * mTouchSlop;
} else if (checkHorizontal) {
return Math.abs(dx) > mTouchSlop;
} else if (checkVertical) {
return Math.abs(dy) > mTouchSlop;
}
return false;
}
/**
* Check if any of the edges specified were initially touched in the currently active gesture.
* If there is no currently active gesture this method will return false.
*
* @param edges Edges to check for an initial edge touch. See {@link #EDGE_LEFT},
* {@link #EDGE_TOP}, {@link #EDGE_RIGHT}, {@link #EDGE_BOTTOM} and
* {@link #EDGE_ALL}
* @return true if any of the edges specified were initially touched in the current gesture
*/
public boolean isEdgeTouched(int edges) {
final int count = mInitialEdgesTouched.length;
for (int i = 0; i < count; i++) {
if (isEdgeTouched(edges, i)) {
return true;
}
}
return false;
}
/**
* Check if any of the edges specified were initially touched by the pointer with
* the specified ID. If there is no currently active gesture or if there is no pointer with
* the given ID currently down this method will return false.
*
* @param edges Edges to check for an initial edge touch. See {@link #EDGE_LEFT},
* {@link #EDGE_TOP}, {@link #EDGE_RIGHT}, {@link #EDGE_BOTTOM} and
* {@link #EDGE_ALL}
* @return true if any of the edges specified were initially touched in the current gesture
*/
public boolean isEdgeTouched(int edges, int pointerId) {
return isPointerDown(pointerId) && (mInitialEdgesTouched[pointerId] & edges) != 0;
}
private void releaseViewForPointerUp() {
mVelocityTracker.computeCurrentVelocity(1000, mMaxVelocity);
final float xvel = clampMag(
VelocityTrackerCompat.getXVelocity(mVelocityTracker, mActivePointerId),
mMinVelocity, mMaxVelocity);
final float yvel = clampMag(
VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId),
mMinVelocity, mMaxVelocity);
dispatchViewReleased(xvel, yvel);
}
private void dragTo(int left, int top, int dx, int dy) {
int clampedX = left;
int clampedY = top;
final int oldLeft = mCapturedView.getLeft();
final int oldTop = mCapturedView.getTop();
if (dx != 0) {
clampedX = mCallback.clampViewPositionHorizontal(mCapturedView, left, dx);
mCapturedView.offsetLeftAndRight(clampedX - oldLeft);
}
if (dy != 0) {
clampedY = mCallback.clampViewPositionVertical(mCapturedView, top, dy);
mCapturedView.offsetTopAndBottom(clampedY - oldTop);
}
if (dx != 0 || dy != 0) {
final int clampedDx = clampedX - oldLeft;
final int clampedDy = clampedY - oldTop;
mCallback.onViewPositionChanged(mCapturedView, clampedX, clampedY,
clampedDx, clampedDy);
}
}
/**
* Determine if the currently captured view is under the given point in the
* parent view's coordinate system. If there is no captured view this method
* will return false.
*
* @param x X position to test in the parent's coordinate system
* @param y Y position to test in the parent's coordinate system
* @return true if the captured view is under the given point, false otherwise
*/
public boolean isCapturedViewUnder(int x, int y) {
return isViewUnder(mCapturedView, x, y);
}
/**
* Determine if the supplied view is under the given point in the
* parent view's coordinate system.
*
* @param view Child view of the parent to hit test
* @param x X position to test in the parent's coordinate system
* @param y Y position to test in the parent's coordinate system
* @return true if the supplied view is under the given point, false otherwise
*/
public boolean isViewUnder(View view, int x, int y) {
if (view == null) {
return false;
}
return x >= view.getLeft() &&
x < view.getRight() &&
y >= view.getTop() &&
y < view.getBottom();
}
/**
* Find the topmost child under the given point within the parent view's coordinate system.
* The child order is determined using {@link Callback#getOrderedChildIndex(int)}.
*
* @param x X position to test in the parent's coordinate system
* @param y Y position to test in the parent's coordinate system
* @return The topmost child view under (x, y) or null if none found.
*/
public View findTopChildUnder(int x, int y) {
final int childCount = mParentView.getChildCount();
for (int i = childCount - 1; i >= 0; i--) {
final View child = mParentView.getChildAt(mCallback.getOrderedChildIndex(i));
if (x >= child.getLeft() && x < child.getRight() &&
y >= child.getTop() && y < child.getBottom()) {
return child;
}
}
return null;
}
private int getEdgesTouched(int x, int y) {
int result = 0;
if (x < mParentView.getLeft() + mEdgeSize) result |= EDGE_LEFT;
if (y < mParentView.getTop() + mEdgeSize) result |= EDGE_TOP;
if (x > mParentView.getRight() - mEdgeSize) result |= EDGE_RIGHT;
if (y > mParentView.getBottom() - mEdgeSize) result |= EDGE_BOTTOM;
return result;
}
}
Raw
main_activity.xml
<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
<com.levibostian.customdurationnavigationdrawer.widget.CustomDurationDrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<fragment android:id="@+id/navigation_drawer"
android:layout_width="@dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
android:name="com.levibostian.customdurationnavigationdrawer.fragment.NavigationDrawerFragment"
tools:layout="@layout/navigation_drawer" />
</com.levibostian.customdurationnavigationdrawer.widget.CustomDurationDrawerLayout>
Raw
MainActivity.java
package com.levibostian.customdurationnavigationdrawer.activity;
import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import com.levibostian.customdurationnavigationdrawer.fragment.NavigationDrawerFragment;
import com.levibostian.customdurationnavigationdrawer.R;
import com.levibostian.customdurationnavigationdrawer.widget.CustomDurationDrawerLayout;
public class MainActivity extends ActionBarActivity implements NavigationDrawerFragment.NavigationDrawerCallbacks {
private NavigationDrawerFragment mNavigationDrawerFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
mNavigationDrawerFragment.setUp(R.id.navigation_drawer, (CustomDurationDrawerLayout) findViewById(R.id.drawer_layout));
}
@Override
public void onNavigationDrawerItemSelected(int position) {
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, PlaceholderFragment.newInstance(position + 1))
.commit();
}
public void restoreActionBar() {
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayShowTitleEnabled(true);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
getMenuInflater().inflate(R.menu.main, menu);
restoreActionBar();
return true;
}
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static class PlaceholderFragment extends Fragment {
private static final String ARG_SECTION_NUMBER = "section_number";
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.main_fragment, container, false);
return rootView;
}
}
}
Raw
NavigationDrawerFragment.java
package com.levibostian.customdurationnavigationdrawer.fragment;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import com.levibostian.customdurationnavigationdrawer.R;
import com.levibostian.customdurationnavigationdrawer.app.CustomDurationActionBarDrawerToggle;
import com.levibostian.customdurationnavigationdrawer.widget.CustomDurationDrawerLayout;
public class NavigationDrawerFragment extends Fragment {
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
private NavigationDrawerCallbacks mCallbacks;
private CustomDurationActionBarDrawerToggle mDrawerToggle;
private CustomDurationDrawerLayout mDrawerLayout;
private ListView mDrawerListView;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = 0;
private boolean mFromSavedInstanceState;
public NavigationDrawerFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
mFromSavedInstanceState = true;
}
selectItem(mCurrentSelectedPosition);
}
@Override
public void onActivityCreated (Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mDrawerListView = (ListView) inflater.inflate(
R.layout.navigation_drawer, container, false);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
});
mDrawerListView.setAdapter(new ArrayAdapter<String>(
getActionBar().getThemedContext(),
android.R.layout.simple_list_item_1,
android.R.id.text1,
new String[]{
getString(R.string.title_section1),
getString(R.string.title_section2),
getString(R.string.title_section3),
}));
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
return mDrawerListView;
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
public void setUp(int fragmentId, CustomDurationDrawerLayout drawerLayout) {
mFragmentContainerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
mDrawerToggle = new CustomDurationActionBarDrawerToggle(
getActivity(),
mDrawerLayout,
R.drawable.ic_drawer,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu();
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu();
}
};
if (!mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerListView != null) {
mDrawerListView.setItemChecked(position, true);
}
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if (mDrawerLayout != null && isDrawerOpen()) {
inflater.inflate(R.menu.global, menu);
showGlobalContextActionBar();
}
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
if (item.getItemId() == R.id.action_example) {
Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
private void showGlobalContextActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setTitle(R.string.app_name);
}
private ActionBar getActionBar() {
return ((ActionBarActivity) getActivity()).getSupportActionBar();
}
public static interface NavigationDrawerCallbacks {
void onNavigationDrawerItemSelected(int position);
}
}
@himb2001
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You didnt provide dimens.xml and other layout files

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