2d Recents: show full task thumbnail and don't overlap header

Bug: 32101881
Test: On local sw600dp, tested recents layout
Change-Id: Ibc3bf720f7ae3303b6283707c8114643a0e8d0af

packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java

@@ -148,7 +148,7 @@ public class TaskView extends FixedSizeFrameLayout implements Task.TaskCallbacks
     private ArrayList<Animator> mTmpAnimators = new ArrayList<>();
 
     @ViewDebug.ExportedProperty(deepExport=true, prefix="thumbnail_")
-    TaskViewThumbnail mThumbnailView;
+    protected TaskViewThumbnail mThumbnailView;
     @ViewDebug.ExportedProperty(deepExport=true, prefix="header_")
     TaskViewHeader mHeaderView;
     private View mActionButtonView;
@@ -239,7 +239,7 @@ public class TaskView extends FixedSizeFrameLayout implements Task.TaskCallbacks
     /**
      * Update the task view when the configuration changes.
      */
-    void onConfigurationChanged() {
+    protected void onConfigurationChanged() {
         mHeaderView.onConfigurationChanged();
     }
 

packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java

@@ -60,6 +60,8 @@ public class TaskViewThumbnail extends View {
     @ViewDebug.ExportedProperty(category="recents")
     private float mThumbnailScale;
     private float mFullscreenThumbnailScale;
+    private boolean mSizeToFit = false;
+    private boolean mOverlayHeaderOnThumbnailActionBar = true;
     private ActivityManager.TaskThumbnailInfo mThumbnailInfo;
 
     private int mCornerRadius;
@@ -140,9 +142,10 @@ public class TaskViewThumbnail extends View {
             canvas.drawRoundRect(0, 0, viewWidth, viewHeight, mCornerRadius, mCornerRadius,
                     mLockedPaint);
         } else if (mBitmapShader != null && thumbnailWidth > 0 && thumbnailHeight > 0) {
-            int topOffset = mTaskBar != null
-                    ? mTaskBar.getHeight() - mCornerRadius
-                    : 0;
+            int topOffset = 0;
+            if (mTaskBar != null && mOverlayHeaderOnThumbnailActionBar) {
+                topOffset = mTaskBar.getHeight() - mCornerRadius;
+            }
 
             // Draw the background, there will be some small overdraw with the thumbnail
             if (thumbnailWidth < viewWidth) {
@@ -238,7 +241,7 @@ public class TaskViewThumbnail extends View {
                 // If we haven't measured or the thumbnail is invalid, skip the thumbnail drawing
                 // and only draw the background color
                 mThumbnailScale = 0f;
-            } else if (isStackTask) {
+            } else if (isStackTask && !mSizeToFit) {
                 float invThumbnailScale = 1f / mFullscreenThumbnailScale;
                 if (mDisplayOrientation == Configuration.ORIENTATION_PORTRAIT) {
                     if (mThumbnailInfo.screenOrientation == Configuration.ORIENTATION_PORTRAIT) {
@@ -270,6 +273,19 @@ public class TaskViewThumbnail extends View {
         }
     }
 
+    /** Sets whether the thumbnail should be resized to fit the task view in all orientations. */
+    public void setSizeToFit(boolean flag) {
+        mSizeToFit = flag;
+    }
+
+    /**
+     * Sets whether the header should overlap (and hide) the action bar in the thumbnail, or
+     * be stacked just above it.
+     */
+    public void setOverlayHeaderOnThumbnailActionBar(boolean flag) {
+        mOverlayHeaderOnThumbnailActionBar = flag;
+    }
+
     /** Updates the clip rect based on the given task bar. */
     void updateClipToTaskBar(View taskBar) {
         mTaskBar = taskBar;

packages/SystemUI/src/com/android/systemui/recents/views/grid/GridTaskView.java

@@ -23,6 +23,10 @@ import com.android.systemui.recents.views.AnimateableViewBounds;
 import com.android.systemui.recents.views.TaskView;
 
 public class GridTaskView extends TaskView {
+
+    /** The height, in pixels, of the header view. */
+    private int mHeaderHeight;
+
     public GridTaskView(Context context) {
         this(context, null);
     }
@@ -37,6 +41,18 @@ public class GridTaskView extends TaskView {
 
     public GridTaskView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
         super(context, attrs, defStyleAttr, defStyleRes);
+        mHeaderHeight = context.getResources().getDimensionPixelSize(
+                R.dimen.recents_task_view_header_height);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        // Show the full thumbnail and don't overlap with the header.
+        mThumbnailView.setSizeToFit(true);
+        mThumbnailView.setOverlayHeaderOnThumbnailActionBar(false);
+        mThumbnailView.updateThumbnailScale();
+        mThumbnailView.setTranslationY(mHeaderHeight);
     }
 
     @Override
@@ -44,4 +60,12 @@ public class GridTaskView extends TaskView {
         return new AnimateableGridViewBounds(this, mContext.getResources().getDimensionPixelSize(
             R.dimen.recents_task_view_shadow_rounded_corners_radius));
     }
+
+    @Override
+    protected void onConfigurationChanged() {
+        super.onConfigurationChanged();
+        mHeaderHeight = mContext.getResources().getDimensionPixelSize(
+                R.dimen.recents_task_view_header_height);
+        mThumbnailView.setTranslationY(mHeaderHeight);
+    }
 }