Fix animating between very different heights

 - Expand ViewHeightController so it can expand up or down
 - Control the height of all containers in the hierarchy
 - Intercept touch events and compensate for any top offset
   on the root view, since we expand upwards
 - Remove the current description from the description container
   so that it can shrink in relayout if necessary.

Bug: 21879037
Bug: 21784297
Change-Id: I3ad562158013b75c5e9150cbd91c96c6ff4941c9

1 files changed, 12 insertions, 0 deletions

diff --git a/src/com/android/packageinstaller/permission/ui/GrantPermissionsActivity.java b/src/com/android/packageinstaller/permission/ui/GrantPermissionsActivity.java
index ba2a4cd9..98773f54 100644
--- a/src/com/android/packageinstaller/permission/ui/GrantPermissionsActivity.java
+++ b/src/com/android/packageinstaller/permission/ui/GrantPermissionsActivity.java
@@ -37,6 +37,8 @@ import android.text.style.ForegroundColorSpan;
 import android.util.ArrayMap;
 import android.util.Log;
 import android.view.KeyEvent;
+import android.view.MotionEvent;
+import android.view.View;
 import android.view.Window;
 import android.view.WindowManager;
 
@@ -146,6 +148,16 @@ public class GrantPermissionsActivity extends Activity
     }
 
     @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        View rootView = getWindow().getDecorView();
+        if (rootView.getTop() != 0) {
+            // We are animating the top view, need to compensate for that in motion events.
+            ev.setLocation(ev.getX(), ev.getY() - rootView.getTop());
+        }
+        return super.dispatchTouchEvent(ev);
+    }
+
+    @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
         mViewHandler.saveInstanceState(outState);