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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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 android.preference;
import android.content.Context;
import android.content.res.TypedArray;
import android.database.ContentObserver;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.media.AudioManager;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.provider.Settings;
import android.provider.Settings.System;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
/**
* @hide
*/
public class VolumePreference extends SeekBarPreference implements
PreferenceManager.OnActivityStopListener {
private static final String TAG = "VolumePreference";
private int mStreamType;
/** May be null if the dialog isn't visible. */
private SeekBarVolumizer mSeekBarVolumizer;
public VolumePreference(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.VolumePreference, 0, 0);
mStreamType = a.getInt(android.R.styleable.VolumePreference_streamType, 0);
a.recycle();
}
public void setStreamType(int streamType) {
mStreamType = streamType;
}
@Override
protected void onBindDialogView(View view) {
super.onBindDialogView(view);
final SeekBar seekBar = (SeekBar) view.findViewById(com.android.internal.R.id.seekbar);
mSeekBarVolumizer = new SeekBarVolumizer(getContext(), seekBar, mStreamType);
getPreferenceManager().registerOnActivityStopListener(this);
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (!positiveResult && mSeekBarVolumizer != null) {
mSeekBarVolumizer.revertVolume();
}
cleanup();
}
public void onActivityStop() {
cleanup();
}
/**
* Do clean up. This can be called multiple times!
*/
private void cleanup() {
getPreferenceManager().unregisterOnActivityStopListener(this);
if (mSeekBarVolumizer != null) {
mSeekBarVolumizer.stop();
mSeekBarVolumizer = null;
}
}
protected void onSampleStarting(SeekBarVolumizer volumizer) {
if (mSeekBarVolumizer != null && volumizer != mSeekBarVolumizer) {
mSeekBarVolumizer.stopSample();
}
}
/**
* Turns a {@link SeekBar} into a volume control.
*/
public class SeekBarVolumizer implements OnSeekBarChangeListener, Runnable {
private Context mContext;
private Handler mHandler = new Handler();
private AudioManager mAudioManager;
private int mStreamType;
private int mOriginalStreamVolume;
private Ringtone mRingtone;
private int mLastProgress;
private SeekBar mSeekBar;
private ContentObserver mVolumeObserver = new ContentObserver(mHandler) {
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
if (mSeekBar != null) {
mSeekBar.setProgress(System.getInt(mContext.getContentResolver(),
System.VOLUME_SETTINGS[mStreamType], 0));
}
}
};
public SeekBarVolumizer(Context context, SeekBar seekBar, int streamType) {
mContext = context;
mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
mStreamType = streamType;
mSeekBar = seekBar;
initSeekBar(seekBar);
}
private void initSeekBar(SeekBar seekBar) {
seekBar.setMax(mAudioManager.getStreamMaxVolume(mStreamType));
mOriginalStreamVolume = mAudioManager.getStreamVolume(mStreamType);
seekBar.setProgress(mOriginalStreamVolume);
seekBar.setOnSeekBarChangeListener(this);
mContext.getContentResolver().registerContentObserver(
System.getUriFor(System.VOLUME_SETTINGS[mStreamType]),
false, mVolumeObserver);
mRingtone = RingtoneManager.getRingtone(mContext,
mStreamType == AudioManager.STREAM_NOTIFICATION
? Settings.System.DEFAULT_NOTIFICATION_URI
: Settings.System.DEFAULT_RINGTONE_URI);
mRingtone.setStreamType(mStreamType);
}
public void stop() {
stopSample();
mContext.getContentResolver().unregisterContentObserver(mVolumeObserver);
mSeekBar.setOnSeekBarChangeListener(null);
}
public void revertVolume() {
mAudioManager.setStreamVolume(mStreamType, mOriginalStreamVolume, 0);
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromTouch) {
if (!fromTouch) {
return;
}
postSetVolume(progress);
}
private void postSetVolume(int progress) {
// Do the volume changing separately to give responsive UI
mLastProgress = progress;
mHandler.removeCallbacks(this);
mHandler.post(this);
}
public void onStartTrackingTouch(SeekBar seekBar) {
}
public void onStopTrackingTouch(SeekBar seekBar) {
if (mRingtone != null && !mRingtone.isPlaying()) {
sample();
}
}
public void run() {
mAudioManager.setStreamVolume(mStreamType, mLastProgress, 0);
}
private void sample() {
onSampleStarting(this);
mRingtone.play();
}
public void stopSample() {
if (mRingtone != null) {
mRingtone.stop();
}
}
public SeekBar getSeekBar() {
return mSeekBar;
}
}
}
|
