Api23/UI

ActionBarCompat.java

  // Set the Action Bar to use tabs for navigation
  ActionBar ab = getSupportActionBar();
  ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
  // Add three tabs to the Action Bar for display
  ab.addTab(ab.newTab().setText("Tab 1").setTabListener(this)); //ActionBar.TabListener
  ab.addTab(ab.newTab().setText("Tab 2").setTabListener(this));
  ab.addTab(ab.newTab().setText("Tab 3").setTabListener(this));

CheckableLinearLayout.java

public class CheckableLinearLayout extends LinearLayout implements Checkable {
    private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};

    private boolean mChecked = false;

    public CheckableLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public boolean isChecked() {
        return mChecked;
    }

    public void setChecked(boolean b) {
        if (b != mChecked) {
            mChecked = b;
            refreshDrawableState();
        }
    }

    public void toggle() {
        setChecked(!mChecked);
    }

    @Override
    public int[] onCreateDrawableState(int extraSpace) {
        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
        if (isChecked()) {
            mergeDrawableStates(drawableState, CHECKED_STATE_SET);
        }
        return drawableState;
    }
}

CustomViewAccessibility.java

//From api23/ui/BassicAccessibility/DialView.java
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED); //触发AccessibilityEvent
@Override
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
    super.onPopulateAccessibilityEvent(event);
    // Detect what type of accessibility event is being passed in.
    int eventType = event.getEventType();
    // Common case: The user has interacted with our view in some way. State may or may not
    // have been changed. Read out the current status of the view.
    // We also set some other metadata which is not used by TalkBack, but could be used by
    // other TTS engines.
    if (eventType == AccessibilityEvent.TYPE_VIEW_SELECTED ||
            eventType == AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED) {
        event.getText().add("Mode selected: " + Integer.toString(mActiveSelection + 1) + ".");
        event.setItemCount(SELECTION_COUNT);
        event.setCurrentItemIndex(mActiveSelection);
    }

    // When a user first focuses on our view, we'll also read out some simple instructions to
    // make it clear that this is an interactive element.
    if (eventType == AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED) {
        event.getText().add("Tap to change.");
    }
}

HeadsUpNotification.java

Notification createNotification(boolean makeHeadsUpNotification) {
        Notification.Builder notificationBuilder = new Notification.Builder(getActivity())
                .setSmallIcon(R.drawable.ic_launcher_notification)
                .setPriority(Notification.PRIORITY_DEFAULT)
                .setCategory(Notification.CATEGORY_MESSAGE)
                .setContentTitle("Sample Notification")
                .setContentText("This is a normal notification.");
        if (makeHeadsUpNotification) {
            Intent push = new Intent();
            push.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            push.setClass(getActivity(), LNotificationActivity.class);

            PendingIntent fullScreenPendingIntent = PendingIntent.getActivity(getActivity(), 0,
                    push, PendingIntent.FLAG_CANCEL_CURRENT);
            notificationBuilder
                    .setContentText("Heads-Up Notification on Android L or above.")
                    .setFullScreenIntent(fullScreenPendingIntent, true);
        }
        return notificationBuilder.build();
    }

Immersive2Mode.java

//leanback mode 
int uiOptions = flagsView.getSystemUiVisibility();
uiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
uiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
uiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE;
uiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
flagsView.setSystemUiVisibility(uiOptions);
//Immersive mode
int uiOptions = flagsView.getSystemUiVisibility();
uiOptions &= ~View.SYSTEM_UI_FLAG_LOW_PROFILE;
uiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
uiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
uiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE;
uiOptions &= ~View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
flagsView.setSystemUiVisibility(uiOptions);

main_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:support="http://schemas.android.com/apk/res-auto">

    <!--
      To use ShareActionProvider provided by ActionBarCompat, we reference the class by set the
      support:actionProviderClass attribute with the full class name of ShareActionProvider.
    -->
    <item
        android:id="@+id/menu_share"
        android:title="@string/menu_share"
        support:actionProviderClass="android.support.v7.widget.ShareActionProvider"
        support:showAsAction="always" />

</menu>

materialFlatButton.xml

<Button style="?android:buttonBarButtonStyle"
            android:id="@+id/ok_button"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/ok" />

Tint.xml

//nine-patch drawable Button 直接设置背景
<nine-patch xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/btn_default_normal_holo"
    android:tint="@color/custom_tint" //看下面
    android:tintMode="multiply" />
    
//custom-tint.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Pressed state -->
    <item android:color="@color/red" android:state_pressed="true" />
    <!-- Focused state -->
    <item android:color="@color/light_purple" android:state_focused="true" />
    <item android:color="@color/deep_purple" android:state_enabled="true" />
    <!-- Disabled state -->
    <item android:color="@color/light_blue" android:state_enabled="false" />
    <!-- Default -->
    <item android:color="@color/light_blue" />
</selector>