1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/*
* Copyright (C) 2010 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.client.android;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.util.Log;
import java.io.IOException;
/**
* Manages beeps and vibrations for {@link CaptureActivity}.
*/
final class BeepManager {
private static final String TAG = BeepManager.class.getSimpleName();
private static final float BEEP_VOLUME = 0.10f;
private static final long VIBRATE_DURATION = 200L;
private final Activity activity;
private MediaPlayer mediaPlayer;
private boolean playBeep;
private boolean vibrate;
BeepManager(Activity activity) {
this.activity = activity;
this.mediaPlayer = null;
updatePrefs();
}
void updatePrefs() {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
playBeep = shouldBeep(prefs, activity);
vibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
if (playBeep && mediaPlayer == null) {
// The volume on STREAM_SYSTEM is not adjustable, and users found it too loud,
// so we now play on the music stream.
activity.setVolumeControlStream(AudioManager.STREAM_MUSIC);
mediaPlayer = buildMediaPlayer(activity);
}
}
void playBeepSoundAndVibrate() {
if (playBeep && mediaPlayer != null) {
mediaPlayer.start();
}
if (vibrate) {
Vibrator vibrator = (Vibrator) activity.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(VIBRATE_DURATION);
}
}
private static boolean shouldBeep(SharedPreferences prefs, Context activity) {
boolean shouldPlayBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
if (shouldPlayBeep) {
// See if sound settings overrides this
AudioManager audioService = (AudioManager) activity.getSystemService(Context.AUDIO_SERVICE);
if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
shouldPlayBeep = false;
}
}
return shouldPlayBeep;
}
private static MediaPlayer buildMediaPlayer(Context activity) {
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
// When the beep has finished playing, rewind to queue up another one.
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer player) {
player.seekTo(0);
}
});
AssetFileDescriptor file = activity.getResources().openRawResourceFd(R.raw.zxing_beep);
try {
mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength());
file.close();
mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
mediaPlayer.prepare();
} catch (IOException ioe) {
Log.w(TAG, ioe);
mediaPlayer = null;
}
return mediaPlayer;
}
}
|
