1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License
15  */
16 
17 package com.android.keyguard;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.widget.ImageButton;
22 
23 /**
24  * A frame layout which does not have overlapping renderings commands and therefore does not need a
25  * layer when alpha is changed.
26  */
27 public class AlphaOptimizedImageButton extends ImageButton {
28 
AlphaOptimizedImageButton(Context context, AttributeSet attrs)29     public AlphaOptimizedImageButton(Context context, AttributeSet attrs) {
30         super(context, attrs);
31     }
32 
33     @Override
hasOverlappingRendering()34     public boolean hasOverlappingRendering() {
35         return false;
36     }
37 }
38