1 /*
2  * Copyright (C) 2015 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 package com.android.messaging.ui;
17 
18 import android.animation.ObjectAnimator;
19 import android.animation.TimeAnimator;
20 import android.animation.TimeAnimator.TimeListener;
21 import android.content.Context;
22 import android.graphics.drawable.ClipDrawable;
23 import android.graphics.drawable.Drawable;
24 import android.os.SystemClock;
25 import android.util.AttributeSet;
26 import android.view.Gravity;
27 import android.widget.ProgressBar;
28 
29 /**
30  * Shows a styled progress bar that is synchronized with the playback state of an audio attachment.
31  */
32 public class AudioPlaybackProgressBar extends ProgressBar implements PlaybackStateView {
33     private long mDurationInMillis;
34     private final TimeAnimator mUpdateAnimator;
35     private long mCumulativeTime = 0;
36     private long mCurrentPlayStartTime = 0;
37     private boolean mIncoming = false;
38 
AudioPlaybackProgressBar(final Context context, final AttributeSet attrs)39     public AudioPlaybackProgressBar(final Context context, final AttributeSet attrs) {
40         super(context, attrs);
41 
42         mUpdateAnimator = new TimeAnimator();
43         mUpdateAnimator.setRepeatCount(ObjectAnimator.INFINITE);
44         mUpdateAnimator.setTimeListener(new TimeListener() {
45             @Override
46             public void onTimeUpdate(final TimeAnimator animation, final long totalTime,
47                     final long deltaTime) {
48                 int progress = 0;
49                 if (mDurationInMillis > 0) {
50                     progress = (int) (((mCumulativeTime + SystemClock.elapsedRealtime() -
51                             mCurrentPlayStartTime) * 1.0f / mDurationInMillis) * 100);
52                     progress = Math.max(Math.min(progress, 100), 0);
53                 }
54                 setProgress(progress);
55             }
56         });
57         updateAppearance();
58     }
59 
60     /**
61      * Sets the duration of the audio that's being played, in milliseconds.
62      */
setDuration(final long durationInMillis)63     public void setDuration(final long durationInMillis) {
64         mDurationInMillis = durationInMillis;
65     }
66 
67     @Override
restart()68     public void restart() {
69         reset();
70         resume();
71     }
72 
73     @Override
reset()74     public void reset() {
75         stopUpdateTicks();
76         setProgress(0);
77         mCumulativeTime = 0;
78         mCurrentPlayStartTime = 0;
79     }
80 
81     @Override
resume()82     public void resume() {
83         mCurrentPlayStartTime = SystemClock.elapsedRealtime();
84         startUpdateTicks();
85     }
86 
87     @Override
pause()88     public void pause() {
89         mCumulativeTime += SystemClock.elapsedRealtime() - mCurrentPlayStartTime;
90         stopUpdateTicks();
91     }
92 
startUpdateTicks()93     private void startUpdateTicks() {
94         if (!mUpdateAnimator.isStarted()) {
95             mUpdateAnimator.start();
96         }
97     }
98 
stopUpdateTicks()99     private void stopUpdateTicks() {
100         if (mUpdateAnimator.isStarted()) {
101             mUpdateAnimator.end();
102         }
103     }
104 
updateAppearance()105     private void updateAppearance() {
106         final Drawable drawable =
107                 ConversationDrawables.get().getAudioProgressDrawable(mIncoming);
108         final ClipDrawable clipDrawable = new ClipDrawable(drawable, Gravity.START,
109                 ClipDrawable.HORIZONTAL);
110         setProgressDrawable(clipDrawable);
111         setBackground(ConversationDrawables.get()
112                 .getAudioProgressBackgroundDrawable(mIncoming));
113     }
114 
setVisualStyle(final boolean incoming)115     public void setVisualStyle(final boolean incoming) {
116         if (mIncoming != incoming) {
117             mIncoming = incoming;
118             updateAppearance();
119         }
120     }
121 }
122