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.camera.ui.motion;
18 
19 import android.os.SystemClock;
20 
21 /**
22  * Wraps the SystemClock static time methods so they can be exercised in tests.
23  */
24 public abstract class AnimationClock {
25 
getTimeMillis()26     public abstract long getTimeMillis();
27 
28     /**
29      * Forwards calls to SystemClock.uptimeMillis() since it is the most consistent clock for
30      * animations.
31      */
32     public static class SystemTimeClock extends AnimationClock {
33 
34         @Override
getTimeMillis()35         public long getTimeMillis() {
36             return SystemClock.uptimeMillis();
37         }
38     }
39 }
40