1 
2 /*
3  * Copyright (C) 2012 The Android Open Source Project
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 package com.android.gallery3d.ui;
19 
20 import android.os.SystemClock;
21 
22 //
23 // The animation time should ideally be the vsync time the frame will be
24 // displayed, but that is an unknown time in the future. So we use the system
25 // time just after eglSwapBuffers (when GLSurfaceView.onDrawFrame is called)
26 // as a approximation.
27 //
28 public class AnimationTime {
29     private static volatile long sTime;
30 
31     // Sets current time as the animation time.
update()32     public static void update() {
33         sTime = SystemClock.uptimeMillis();
34     }
35 
36     // Returns the animation time.
get()37     public static long get() {
38         return sTime;
39     }
40 
startTime()41     public static long startTime() {
42         sTime = SystemClock.uptimeMillis();
43         return sTime;
44     }
45 }
46