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      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 
     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
     35         public long getTimeMillis() {
     36             return SystemClock.uptimeMillis();
     37         }
     38     }
     39 }
     40