AnimationTime.java revision cb05834cedb8223fc59456afcd62fa7448f2b3b8 
1/*
2 * Copyright (C) 2012 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
17package com.android.gallery3d.ui;
18
19import android.os.SystemClock;
20
21//
22// The animation time should ideally be the vsync time the frame will be
23// displayed, but that is an unknown time in the future. So we use the system
24// time just after eglSwapBuffers (when GLSurfaceView.onDrawFrame is called)
25// as a approximation.
26//
27public class AnimationTime {
28    private static volatile long sTime;
29
30    // Sets current time as the animation time.
31    public static void update() {
32        sTime = SystemClock.uptimeMillis();
33    }
34
35    // Returns the animation time.
36    public static long get() {
37        return sTime;
38    }
39}
40