1 files changed, 50 insertions, 0 deletions
diff --git a/src/com/android/tv/ui/HardwareLayerAnimatorListenerAdapter.java b/src/com/android/tv/ui/HardwareLayerAnimatorListenerAdapter.java
new file mode 100644
index 00000000..126e1061
--- /dev/null
+++ b/src/com/android/tv/ui/HardwareLayerAnimatorListenerAdapter.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.tv.ui;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.view.View;
+
+/**
+ * An AnimatorListenerAdapter subclass that conveniently sets the layer type to hardware during the
+ * animation.
+ */
+public class HardwareLayerAnimatorListenerAdapter extends AnimatorListenerAdapter {
+    private final View mView;
+    private boolean mLayerTypeChanged;
+
+    public HardwareLayerAnimatorListenerAdapter(View view) {
+        mView = view;
+    }
+
+    @Override
+    public void onAnimationStart(Animator animator) {
+        if (mView.hasOverlappingRendering() && mView.getLayerType() == View.LAYER_TYPE_NONE) {
+            mLayerTypeChanged = true;
+            mView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+        }
+    }
+
+    @Override
+    public void onAnimationEnd(Animator animator) {
+        if (mLayerTypeChanged) {
+            mLayerTypeChanged = false;
+            mView.setLayerType(View.LAYER_TYPE_NONE, null);
+        }
+    }
+}