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September 10, 2016 07:10
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package com.drawers.myapplication; | |
import android.annotation.TargetApi; | |
import android.content.Context; | |
import android.graphics.Point; | |
import android.os.Build; | |
import android.util.AttributeSet; | |
import android.view.Display; | |
import android.view.View; | |
import android.view.ViewGroup; | |
import android.view.WindowManager; | |
/** | |
* Custom view group to reduce multiple measures. Only 1 measure pass. | |
* | |
* D/Harshit CustomImageView: MeasureSpec: EXACTLY 120 MeasureSpec: EXACTLY 120 0 | |
* D/Harshit ImageView2: MeasureSpec: EXACTLY 60 MeasureSpec: EXACTLY 60 0 | |
* D/Harshit CustomTextView1: MeasureSpec: EXACTLY 900 MeasureSpec: AT_MOST 1344 0 | |
* D/Harshit CustomTextView2: MeasureSpec: EXACTLY 900 MeasureSpec: AT_MOST 1287 0 | |
*/ | |
public class CustomViewGroup extends ViewGroup { | |
public CustomViewGroup(Context context) { | |
super(context); | |
} | |
public CustomViewGroup(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
} | |
public CustomViewGroup(Context context, AttributeSet attrs, int defStyleAttr) { | |
super(context, attrs, defStyleAttr); | |
} | |
@TargetApi(Build.VERSION_CODES.LOLLIPOP) | |
public CustomViewGroup(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { | |
super(context, attrs, defStyleAttr, defStyleRes); | |
} | |
@Override | |
protected void onLayout(boolean changed, int l, int t, int r, int b) { | |
int childTop; | |
int childLeft; | |
int childRight; | |
int childBottom; | |
MarginLayoutParams layoutParams = (MarginLayoutParams) mProfilePhoto.getLayoutParams(); | |
childLeft = getPaddingLeft() + layoutParams.leftMargin; | |
childRight = childLeft + mProfilePhoto.getMeasuredWidth(); | |
childTop = getPaddingTop() + layoutParams.topMargin; | |
childBottom = childTop + mProfilePhoto.getMeasuredHeight(); | |
int marginRight = layoutParams.rightMargin; | |
mProfilePhoto.layout(childLeft, childTop, childRight, childBottom); | |
layoutParams = (MarginLayoutParams) mMenu.getLayoutParams(); | |
childTop = getPaddingTop() + layoutParams.topMargin; | |
childBottom = childTop + mMenu.getMeasuredHeight(); | |
int width = getScreenWidth(); | |
childLeft = width - mMenu.getMeasuredWidth() - layoutParams.rightMargin; | |
childRight = width - layoutParams.rightMargin; | |
mMenu.layout(childLeft, childTop, childRight, childBottom); | |
layoutParams = (MarginLayoutParams) mTitle.getLayoutParams(); | |
childTop = getPaddingTop() + layoutParams.topMargin; | |
childBottom = childTop + mTitle.getMeasuredHeight(); | |
childLeft = getPaddingLeft() + mProfilePhoto.getMeasuredWidth() + marginRight + layoutParams.leftMargin; | |
childRight = childLeft + mTitle.getMeasuredWidth(); | |
mTitle.layout(childLeft, childTop, childRight, childBottom); | |
childTop = childBottom + layoutParams.bottomMargin; | |
childBottom = childTop + mSubtitle.getMeasuredHeight(); | |
mSubtitle.layout(childLeft, childTop, childRight, childBottom); | |
} | |
private int getScreenWidth() { | |
WindowManager wm = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE); | |
Display display = wm.getDefaultDisplay(); | |
Point size = new Point(); | |
display.getSize(size); | |
return size.x; | |
} | |
private CustomImageView mProfilePhoto; | |
private ImageView2 mMenu; | |
private CustomTextView1 mTitle; | |
private CustomTextView2 mSubtitle; | |
@Override | |
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { | |
// 1. Setup initial constraints. | |
int widthConstraints = getPaddingLeft() + getPaddingRight(); | |
int heightConstraints = getPaddingTop() + getPaddingBottom(); | |
int width = 0; | |
int height = 0; | |
mProfilePhoto = (CustomImageView) getChildAt(0); | |
mMenu = (ImageView2) getChildAt(1); | |
mTitle = (CustomTextView1) getChildAt(2); | |
mSubtitle = (CustomTextView2) getChildAt(3); | |
// 2. Measure the ProfilePhoto | |
measureChildWithMargins( | |
mProfilePhoto, | |
widthMeasureSpec, | |
widthConstraints, | |
heightMeasureSpec, | |
heightConstraints); | |
// 3. Update the contraints. | |
widthConstraints += mProfilePhoto.getMeasuredWidth(); | |
width += mProfilePhoto.getMeasuredWidth(); | |
height = Math.max(mProfilePhoto.getMeasuredHeight() + getPaddingTop(), height); | |
// 4. Measure the Menu. | |
measureChildWithMargins( | |
mMenu, | |
widthMeasureSpec, | |
widthConstraints, | |
heightMeasureSpec, | |
heightConstraints); | |
// 5. Update the constraints. | |
widthConstraints += mMenu.getMeasuredWidth(); | |
width += mMenu.getMeasuredWidth(); | |
height = Math.max(mMenu.getMeasuredHeight(), height); | |
// 6. Prepare the vertical MeasureSpec. | |
int verticalWidthMeasureSpec = MeasureSpec.makeMeasureSpec( | |
MeasureSpec.getSize(widthMeasureSpec) - widthConstraints, | |
MeasureSpec.getMode(widthMeasureSpec)); | |
int verticalHeightMeasureSpec = MeasureSpec.makeMeasureSpec( | |
MeasureSpec.getSize(heightMeasureSpec) - heightConstraints, | |
MeasureSpec.getMode(heightMeasureSpec)); | |
// 7. Measure the Title. | |
measureChildWithMargins( | |
mTitle, | |
verticalWidthMeasureSpec, | |
0, | |
verticalHeightMeasureSpec, | |
0); | |
// 8. Measure the Subtitle. | |
measureChildWithMargins( | |
mSubtitle, | |
verticalWidthMeasureSpec, | |
0, | |
verticalHeightMeasureSpec, | |
mTitle.getMeasuredHeight()); | |
// 9. Update the sizes. | |
width += Math.max(mTitle.getMeasuredWidth(), mSubtitle.getMeasuredWidth()); | |
height = Math.max(mTitle.getMeasuredHeight() + mSubtitle.getMeasuredHeight(), height); | |
// 10. Set the dimension for this ViewGroup. | |
setMeasuredDimension( | |
resolveSize(width, widthMeasureSpec), | |
resolveSize(height, heightMeasureSpec)); | |
} | |
@Override | |
protected void measureChildWithMargins( | |
View child, | |
int parentWidthMeasureSpec, | |
int widthUsed, | |
int parentHeightMeasureSpec, | |
int heightUsed) { | |
MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); | |
int childWidthMeasureSpec = getChildMeasureSpec( | |
parentWidthMeasureSpec, | |
widthUsed + lp.leftMargin + lp.rightMargin, | |
lp.width); | |
int childHeightMeasureSpec = getChildMeasureSpec( | |
parentHeightMeasureSpec, | |
heightUsed + + lp.topMargin + lp.bottomMargin, | |
lp.height); | |
child.measure(childWidthMeasureSpec, childHeightMeasureSpec); | |
} | |
@Override | |
public LayoutParams generateLayoutParams(AttributeSet attrs) { | |
return new MarginLayoutParams(getContext(), attrs); | |
} | |
} |
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<?xml version="1.0" encoding="utf-8"?> | |
<com.drawers.myapplication.CustomViewGroup | |
xmlns:android="http://schemas.android.com/apk/res/android" | |
xmlns:tools="http://schemas.android.com/tools" | |
android:id="@+id/activity_main" | |
android:paddingTop="@dimen/activity_vertical_margin" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
tools:context="com.drawers.myapplication.MainActivity"> | |
<com.drawers.myapplication.CustomImageView | |
android:layout_width="40dp" | |
android:layout_height="40dp" | |
android:layout_marginLeft="@dimen/activity_horizontal_margin" | |
android:layout_marginRight="32dp" | |
android:src="@android:drawable/sym_def_app_icon" | |
android:contentDescription="profile_photo" | |
/> | |
<com.drawers.myapplication.ImageView2 | |
android:layout_width="20dp" | |
android:layout_height="20dp" | |
android:layout_marginRight="20dp" | |
android:src="@android:drawable/ic_menu_sort_by_size"/> | |
<com.drawers.myapplication.CustomTextView1 | |
android:layout_width="match_parent" | |
android:text="Sherlock Spock" | |
android:textColor="#000" | |
android:layout_height="wrap_content"/> | |
<com.drawers.myapplication.CustomTextView2 | |
android:layout_width="match_parent" | |
android:text="2hr. San Francisco, CA" | |
android:textColor="#000" | |
android:layout_height="wrap_content"/> | |
</com.drawers.myapplication.CustomViewGroup> |
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