7.1 DropTargetBar style

drop_target_bar_horz.xml 背景

               @@ -73,7 +77,7 @@             android:gravity="center"             android:id="@+id/uninstall_target_text"             style="@style/DropTargetButton"-            android:text="@string/uninstall_drop_target_label" />+             />

packages/apps/Launcher3/src/com/android/launcher3/DropTargetBar.java
动画

protected static final int DEFAULT_DRAG_FADE_DURATION = 175;

protected static final int DEFAULT_DRAG_FADE_DURATION = 0;

长按apk时隐藏statueBar

    packages/apps/Launcher3/src/com/android/launcher3/ButtonDropTarget.java         public final void onDragEnter(DragObject d) {    @@ -213,6 +223,7 @@ public abstract class ButtonDropTarget extends TextView                  mAccessibleDrag = options.isAccessibleDrag;             setOnClickListener(mAccessibleDrag ? this : null);    +        mLauncher.hideStatusBar();         }         @@ -230,6 +241,7 @@ public abstract class ButtonDropTarget extends TextView      @Override     public void onDragEnd() {+        mLauncher.showStatusBar();         mActive = false;         setOnClickListener(null);     }packages/apps/Launcher3/src/com/android/launcher3/Launcher.java        super.onCreate(savedInstanceState);-+        initStatusBar();         LauncherAppState app = LauncherAppState.getInstance();          // Load configuration-specific DeviceProfile+    public void hideStatusBar() {+        int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN+                | View.SYSTEM_UI_FLAG_FULLSCREEN;+        uiFlags |= 0x00001000;+        getWindow().getDecorView().setSystemUiVisibility(uiFlags);+    }++    public void showStatusBar() {+        View decorView = getWindow().getDecorView();+        int uiOptions = decorView.getSystemUiVisibility();+        uiOptions &= (~View.SYSTEM_UI_FLAG_FULLSCREEN);+        decorView.setSystemUiVisibility(uiOptions);+    }++    private void initStatusBar() {+        View decorView = getWindow().getDecorView();+        int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE;+        decorView.setSystemUiVisibility(uiFlags);+    }

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