1/* 2 * Copyright (C) 2007 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 android.preference; 18 19import android.app.Dialog; 20import android.content.Context; 21import android.content.res.TypedArray; 22import android.database.ContentObserver; 23import android.media.AudioManager; 24import android.media.Ringtone; 25import android.media.RingtoneManager; 26import android.net.Uri; 27import android.os.Handler; 28import android.os.Parcel; 29import android.os.Parcelable; 30import android.provider.Settings; 31import android.provider.Settings.System; 32import android.util.AttributeSet; 33import android.view.KeyEvent; 34import android.view.View; 35import android.widget.SeekBar; 36import android.widget.SeekBar.OnSeekBarChangeListener; 37 38/** 39 * @hide 40 */ 41public class VolumePreference extends SeekBarDialogPreference implements 42 PreferenceManager.OnActivityStopListener, View.OnKeyListener { 43 44 private static final String TAG = "VolumePreference"; 45 46 private int mStreamType; 47 48 /** May be null if the dialog isn't visible. */ 49 private SeekBarVolumizer mSeekBarVolumizer; 50 51 public VolumePreference(Context context, AttributeSet attrs) { 52 super(context, attrs); 53 54 TypedArray a = context.obtainStyledAttributes(attrs, 55 com.android.internal.R.styleable.VolumePreference, 0, 0); 56 mStreamType = a.getInt(android.R.styleable.VolumePreference_streamType, 0); 57 a.recycle(); 58 } 59 60 public void setStreamType(int streamType) { 61 mStreamType = streamType; 62 } 63 64 @Override 65 protected void onBindDialogView(View view) { 66 super.onBindDialogView(view); 67 68 final SeekBar seekBar = (SeekBar) view.findViewById(com.android.internal.R.id.seekbar); 69 mSeekBarVolumizer = new SeekBarVolumizer(getContext(), seekBar, mStreamType); 70 71 getPreferenceManager().registerOnActivityStopListener(this); 72 73 // grab focus and key events so that pressing the volume buttons in the 74 // dialog doesn't also show the normal volume adjust toast. 75 view.setOnKeyListener(this); 76 view.setFocusableInTouchMode(true); 77 view.requestFocus(); 78 } 79 80 public boolean onKey(View v, int keyCode, KeyEvent event) { 81 // If key arrives immediately after the activity has been cleaned up. 82 if (mSeekBarVolumizer == null) return true; 83 boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN); 84 switch (keyCode) { 85 case KeyEvent.KEYCODE_VOLUME_DOWN: 86 if (isdown) { 87 mSeekBarVolumizer.changeVolumeBy(-1); 88 } 89 return true; 90 case KeyEvent.KEYCODE_VOLUME_UP: 91 if (isdown) { 92 mSeekBarVolumizer.changeVolumeBy(1); 93 } 94 return true; 95 case KeyEvent.KEYCODE_VOLUME_MUTE: 96 if (isdown) { 97 mSeekBarVolumizer.muteVolume(); 98 } 99 return true; 100 default: 101 return false; 102 } 103 } 104 105 @Override 106 protected void onDialogClosed(boolean positiveResult) { 107 super.onDialogClosed(positiveResult); 108 109 if (!positiveResult && mSeekBarVolumizer != null) { 110 mSeekBarVolumizer.revertVolume(); 111 } 112 113 cleanup(); 114 } 115 116 public void onActivityStop() { 117 if (mSeekBarVolumizer != null) { 118 mSeekBarVolumizer.stopSample(); 119 } 120 } 121 122 /** 123 * Do clean up. This can be called multiple times! 124 */ 125 private void cleanup() { 126 getPreferenceManager().unregisterOnActivityStopListener(this); 127 128 if (mSeekBarVolumizer != null) { 129 Dialog dialog = getDialog(); 130 if (dialog != null && dialog.isShowing()) { 131 View view = dialog.getWindow().getDecorView() 132 .findViewById(com.android.internal.R.id.seekbar); 133 if (view != null) view.setOnKeyListener(null); 134 // Stopped while dialog was showing, revert changes 135 mSeekBarVolumizer.revertVolume(); 136 } 137 mSeekBarVolumizer.stop(); 138 mSeekBarVolumizer = null; 139 } 140 141 } 142 143 protected void onSampleStarting(SeekBarVolumizer volumizer) { 144 if (mSeekBarVolumizer != null && volumizer != mSeekBarVolumizer) { 145 mSeekBarVolumizer.stopSample(); 146 } 147 } 148 149 @Override 150 protected Parcelable onSaveInstanceState() { 151 final Parcelable superState = super.onSaveInstanceState(); 152 if (isPersistent()) { 153 // No need to save instance state since it's persistent 154 return superState; 155 } 156 157 final SavedState myState = new SavedState(superState); 158 if (mSeekBarVolumizer != null) { 159 mSeekBarVolumizer.onSaveInstanceState(myState.getVolumeStore()); 160 } 161 return myState; 162 } 163 164 @Override 165 protected void onRestoreInstanceState(Parcelable state) { 166 if (state == null || !state.getClass().equals(SavedState.class)) { 167 // Didn't save state for us in onSaveInstanceState 168 super.onRestoreInstanceState(state); 169 return; 170 } 171 172 SavedState myState = (SavedState) state; 173 super.onRestoreInstanceState(myState.getSuperState()); 174 if (mSeekBarVolumizer != null) { 175 mSeekBarVolumizer.onRestoreInstanceState(myState.getVolumeStore()); 176 } 177 } 178 179 public static class VolumeStore { 180 public int volume = -1; 181 public int originalVolume = -1; 182 } 183 184 private static class SavedState extends BaseSavedState { 185 VolumeStore mVolumeStore = new VolumeStore(); 186 187 public SavedState(Parcel source) { 188 super(source); 189 mVolumeStore.volume = source.readInt(); 190 mVolumeStore.originalVolume = source.readInt(); 191 } 192 193 @Override 194 public void writeToParcel(Parcel dest, int flags) { 195 super.writeToParcel(dest, flags); 196 dest.writeInt(mVolumeStore.volume); 197 dest.writeInt(mVolumeStore.originalVolume); 198 } 199 200 VolumeStore getVolumeStore() { 201 return mVolumeStore; 202 } 203 204 public SavedState(Parcelable superState) { 205 super(superState); 206 } 207 208 public static final Parcelable.Creator<SavedState> CREATOR = 209 new Parcelable.Creator<SavedState>() { 210 public SavedState createFromParcel(Parcel in) { 211 return new SavedState(in); 212 } 213 214 public SavedState[] newArray(int size) { 215 return new SavedState[size]; 216 } 217 }; 218 } 219 220 /** 221 * Turns a {@link SeekBar} into a volume control. 222 */ 223 public class SeekBarVolumizer implements OnSeekBarChangeListener, Runnable { 224 225 private Context mContext; 226 private Handler mHandler = new Handler(); 227 228 private AudioManager mAudioManager; 229 private int mStreamType; 230 private int mOriginalStreamVolume; 231 private Ringtone mRingtone; 232 233 private int mLastProgress = -1; 234 private SeekBar mSeekBar; 235 private int mVolumeBeforeMute = -1; 236 237 private ContentObserver mVolumeObserver = new ContentObserver(mHandler) { 238 @Override 239 public void onChange(boolean selfChange) { 240 super.onChange(selfChange); 241 if (mSeekBar != null && mAudioManager != null) { 242 int volume = mAudioManager.isStreamMute(mStreamType) ? 243 mAudioManager.getLastAudibleStreamVolume(mStreamType) 244 : mAudioManager.getStreamVolume(mStreamType); 245 mSeekBar.setProgress(volume); 246 } 247 } 248 }; 249 250 public SeekBarVolumizer(Context context, SeekBar seekBar, int streamType) { 251 this(context, seekBar, streamType, null); 252 } 253 254 public SeekBarVolumizer(Context context, SeekBar seekBar, int streamType, Uri defaultUri) { 255 mContext = context; 256 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 257 mStreamType = streamType; 258 mSeekBar = seekBar; 259 260 initSeekBar(seekBar, defaultUri); 261 } 262 263 private void initSeekBar(SeekBar seekBar, Uri defaultUri) { 264 seekBar.setMax(mAudioManager.getStreamMaxVolume(mStreamType)); 265 mOriginalStreamVolume = mAudioManager.getStreamVolume(mStreamType); 266 seekBar.setProgress(mOriginalStreamVolume); 267 seekBar.setOnSeekBarChangeListener(this); 268 269 mContext.getContentResolver().registerContentObserver( 270 System.getUriFor(System.VOLUME_SETTINGS[mStreamType]), 271 false, mVolumeObserver); 272 273 if (defaultUri == null) { 274 if (mStreamType == AudioManager.STREAM_RING) { 275 defaultUri = Settings.System.DEFAULT_RINGTONE_URI; 276 } else if (mStreamType == AudioManager.STREAM_NOTIFICATION) { 277 defaultUri = Settings.System.DEFAULT_NOTIFICATION_URI; 278 } else { 279 defaultUri = Settings.System.DEFAULT_ALARM_ALERT_URI; 280 } 281 } 282 283 mRingtone = RingtoneManager.getRingtone(mContext, defaultUri); 284 285 if (mRingtone != null) { 286 mRingtone.setStreamType(mStreamType); 287 } 288 } 289 290 public void stop() { 291 stopSample(); 292 mContext.getContentResolver().unregisterContentObserver(mVolumeObserver); 293 mSeekBar.setOnSeekBarChangeListener(null); 294 } 295 296 public void revertVolume() { 297 mAudioManager.setStreamVolume(mStreamType, mOriginalStreamVolume, 0); 298 } 299 300 public void onProgressChanged(SeekBar seekBar, int progress, 301 boolean fromTouch) { 302 if (!fromTouch) { 303 return; 304 } 305 306 postSetVolume(progress); 307 } 308 309 void postSetVolume(int progress) { 310 // Do the volume changing separately to give responsive UI 311 mLastProgress = progress; 312 mHandler.removeCallbacks(this); 313 mHandler.post(this); 314 } 315 316 public void onStartTrackingTouch(SeekBar seekBar) { 317 } 318 319 public void onStopTrackingTouch(SeekBar seekBar) { 320 if (!isSamplePlaying()) { 321 startSample(); 322 } 323 } 324 325 public void run() { 326 mAudioManager.setStreamVolume(mStreamType, mLastProgress, 0); 327 } 328 329 public boolean isSamplePlaying() { 330 return mRingtone != null && mRingtone.isPlaying(); 331 } 332 333 public void startSample() { 334 onSampleStarting(this); 335 if (mRingtone != null) { 336 mRingtone.play(); 337 } 338 } 339 340 public void stopSample() { 341 if (mRingtone != null) { 342 mRingtone.stop(); 343 } 344 } 345 346 public SeekBar getSeekBar() { 347 return mSeekBar; 348 } 349 350 public void changeVolumeBy(int amount) { 351 mSeekBar.incrementProgressBy(amount); 352 if (!isSamplePlaying()) { 353 startSample(); 354 } 355 postSetVolume(mSeekBar.getProgress()); 356 mVolumeBeforeMute = -1; 357 } 358 359 public void muteVolume() { 360 if (mVolumeBeforeMute != -1) { 361 mSeekBar.setProgress(mVolumeBeforeMute); 362 startSample(); 363 postSetVolume(mVolumeBeforeMute); 364 mVolumeBeforeMute = -1; 365 } else { 366 mVolumeBeforeMute = mSeekBar.getProgress(); 367 mSeekBar.setProgress(0); 368 stopSample(); 369 postSetVolume(0); 370 } 371 } 372 373 public void onSaveInstanceState(VolumeStore volumeStore) { 374 if (mLastProgress >= 0) { 375 volumeStore.volume = mLastProgress; 376 volumeStore.originalVolume = mOriginalStreamVolume; 377 } 378 } 379 380 public void onRestoreInstanceState(VolumeStore volumeStore) { 381 if (volumeStore.volume != -1) { 382 mOriginalStreamVolume = volumeStore.originalVolume; 383 mLastProgress = volumeStore.volume; 384 postSetVolume(mLastProgress); 385 } 386 } 387 } 388} 389