MediaPlayer.java revision 83ddaf664c7a9eb2759269ec75d25dba48edebf2
1/* 2 * Copyright (C) 2006 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.media; 18 19import android.content.BroadcastReceiver; 20import android.content.ContentResolver; 21import android.content.Context; 22import android.content.Intent; 23import android.content.IntentFilter; 24import android.content.res.AssetFileDescriptor; 25import android.net.Proxy; 26import android.net.ProxyProperties; 27import android.net.Uri; 28import android.os.Handler; 29import android.os.Looper; 30import android.os.Message; 31import android.os.Parcel; 32import android.os.Parcelable; 33import android.os.ParcelFileDescriptor; 34import android.os.PowerManager; 35import android.util.Log; 36import android.view.Surface; 37import android.view.SurfaceHolder; 38import android.graphics.Bitmap; 39import android.graphics.SurfaceTexture; 40import android.media.AudioManager; 41import android.media.MediaFormat; 42import android.media.SubtitleData; 43 44import java.io.File; 45import java.io.FileDescriptor; 46import java.io.FileInputStream; 47import java.io.IOException; 48import java.net.InetSocketAddress; 49import java.util.Map; 50import java.util.Set; 51import java.lang.ref.WeakReference; 52 53/** 54 * MediaPlayer class can be used to control playback 55 * of audio/video files and streams. An example on how to use the methods in 56 * this class can be found in {@link android.widget.VideoView}. 57 * 58 * <p>Topics covered here are: 59 * <ol> 60 * <li><a href="#StateDiagram">State Diagram</a> 61 * <li><a href="#Valid_and_Invalid_States">Valid and Invalid States</a> 62 * <li><a href="#Permissions">Permissions</a> 63 * <li><a href="#Callbacks">Register informational and error callbacks</a> 64 * </ol> 65 * 66 * <div class="special reference"> 67 * <h3>Developer Guides</h3> 68 * <p>For more information about how to use MediaPlayer, read the 69 * <a href="{@docRoot}guide/topics/media/mediaplayer.html">Media Playback</a> developer guide.</p> 70 * </div> 71 * 72 * <a name="StateDiagram"></a> 73 * <h3>State Diagram</h3> 74 * 75 * <p>Playback control of audio/video files and streams is managed as a state 76 * machine. The following diagram shows the life cycle and the states of a 77 * MediaPlayer object driven by the supported playback control operations. 78 * The ovals represent the states a MediaPlayer object may reside 79 * in. The arcs represent the playback control operations that drive the object 80 * state transition. There are two types of arcs. The arcs with a single arrow 81 * head represent synchronous method calls, while those with 82 * a double arrow head represent asynchronous method calls.</p> 83 * 84 * <p><img src="../../../images/mediaplayer_state_diagram.gif" 85 * alt="MediaPlayer State diagram" 86 * border="0" /></p> 87 * 88 * <p>From this state diagram, one can see that a MediaPlayer object has the 89 * following states:</p> 90 * <ul> 91 * <li>When a MediaPlayer object is just created using <code>new</code> or 92 * after {@link #reset()} is called, it is in the <em>Idle</em> state; and after 93 * {@link #release()} is called, it is in the <em>End</em> state. Between these 94 * two states is the life cycle of the MediaPlayer object. 95 * <ul> 96 * <li>There is a subtle but important difference between a newly constructed 97 * MediaPlayer object and the MediaPlayer object after {@link #reset()} 98 * is called. It is a programming error to invoke methods such 99 * as {@link #getCurrentPosition()}, 100 * {@link #getDuration()}, {@link #getVideoHeight()}, 101 * {@link #getVideoWidth()}, {@link #setAudioStreamType(int)}, 102 * {@link #setLooping(boolean)}, 103 * {@link #setVolume(float, float)}, {@link #pause()}, {@link #start()}, 104 * {@link #stop()}, {@link #seekTo(int)}, {@link #prepare()} or 105 * {@link #prepareAsync()} in the <em>Idle</em> state for both cases. If any of these 106 * methods is called right after a MediaPlayer object is constructed, 107 * the user supplied callback method OnErrorListener.onError() won't be 108 * called by the internal player engine and the object state remains 109 * unchanged; but if these methods are called right after {@link #reset()}, 110 * the user supplied callback method OnErrorListener.onError() will be 111 * invoked by the internal player engine and the object will be 112 * transfered to the <em>Error</em> state. </li> 113 * <li>It is also recommended that once 114 * a MediaPlayer object is no longer being used, call {@link #release()} immediately 115 * so that resources used by the internal player engine associated with the 116 * MediaPlayer object can be released immediately. Resource may include 117 * singleton resources such as hardware acceleration components and 118 * failure to call {@link #release()} may cause subsequent instances of 119 * MediaPlayer objects to fallback to software implementations or fail 120 * altogether. Once the MediaPlayer 121 * object is in the <em>End</em> state, it can no longer be used and 122 * there is no way to bring it back to any other state. </li> 123 * <li>Furthermore, 124 * the MediaPlayer objects created using <code>new</code> is in the 125 * <em>Idle</em> state, while those created with one 126 * of the overloaded convenient <code>create</code> methods are <em>NOT</em> 127 * in the <em>Idle</em> state. In fact, the objects are in the <em>Prepared</em> 128 * state if the creation using <code>create</code> method is successful. 129 * </li> 130 * </ul> 131 * </li> 132 * <li>In general, some playback control operation may fail due to various 133 * reasons, such as unsupported audio/video format, poorly interleaved 134 * audio/video, resolution too high, streaming timeout, and the like. 135 * Thus, error reporting and recovery is an important concern under 136 * these circumstances. Sometimes, due to programming errors, invoking a playback 137 * control operation in an invalid state may also occur. Under all these 138 * error conditions, the internal player engine invokes a user supplied 139 * OnErrorListener.onError() method if an OnErrorListener has been 140 * registered beforehand via 141 * {@link #setOnErrorListener(android.media.MediaPlayer.OnErrorListener)}. 142 * <ul> 143 * <li>It is important to note that once an error occurs, the 144 * MediaPlayer object enters the <em>Error</em> state (except as noted 145 * above), even if an error listener has not been registered by the application.</li> 146 * <li>In order to reuse a MediaPlayer object that is in the <em> 147 * Error</em> state and recover from the error, 148 * {@link #reset()} can be called to restore the object to its <em>Idle</em> 149 * state.</li> 150 * <li>It is good programming practice to have your application 151 * register a OnErrorListener to look out for error notifications from 152 * the internal player engine.</li> 153 * <li>IllegalStateException is 154 * thrown to prevent programming errors such as calling {@link #prepare()}, 155 * {@link #prepareAsync()}, or one of the overloaded <code>setDataSource 156 * </code> methods in an invalid state. </li> 157 * </ul> 158 * </li> 159 * <li>Calling 160 * {@link #setDataSource(FileDescriptor)}, or 161 * {@link #setDataSource(String)}, or 162 * {@link #setDataSource(Context, Uri)}, or 163 * {@link #setDataSource(FileDescriptor, long, long)} transfers a 164 * MediaPlayer object in the <em>Idle</em> state to the 165 * <em>Initialized</em> state. 166 * <ul> 167 * <li>An IllegalStateException is thrown if 168 * setDataSource() is called in any other state.</li> 169 * <li>It is good programming 170 * practice to always look out for <code>IllegalArgumentException</code> 171 * and <code>IOException</code> that may be thrown from the overloaded 172 * <code>setDataSource</code> methods.</li> 173 * </ul> 174 * </li> 175 * <li>A MediaPlayer object must first enter the <em>Prepared</em> state 176 * before playback can be started. 177 * <ul> 178 * <li>There are two ways (synchronous vs. 179 * asynchronous) that the <em>Prepared</em> state can be reached: 180 * either a call to {@link #prepare()} (synchronous) which 181 * transfers the object to the <em>Prepared</em> state once the method call 182 * returns, or a call to {@link #prepareAsync()} (asynchronous) which 183 * first transfers the object to the <em>Preparing</em> state after the 184 * call returns (which occurs almost right way) while the internal 185 * player engine continues working on the rest of preparation work 186 * until the preparation work completes. When the preparation completes or when {@link #prepare()} call returns, 187 * the internal player engine then calls a user supplied callback method, 188 * onPrepared() of the OnPreparedListener interface, if an 189 * OnPreparedListener is registered beforehand via {@link 190 * #setOnPreparedListener(android.media.MediaPlayer.OnPreparedListener)}.</li> 191 * <li>It is important to note that 192 * the <em>Preparing</em> state is a transient state, and the behavior 193 * of calling any method with side effect while a MediaPlayer object is 194 * in the <em>Preparing</em> state is undefined.</li> 195 * <li>An IllegalStateException is 196 * thrown if {@link #prepare()} or {@link #prepareAsync()} is called in 197 * any other state.</li> 198 * <li>While in the <em>Prepared</em> state, properties 199 * such as audio/sound volume, screenOnWhilePlaying, looping can be 200 * adjusted by invoking the corresponding set methods.</li> 201 * </ul> 202 * </li> 203 * <li>To start the playback, {@link #start()} must be called. After 204 * {@link #start()} returns successfully, the MediaPlayer object is in the 205 * <em>Started</em> state. {@link #isPlaying()} can be called to test 206 * whether the MediaPlayer object is in the <em>Started</em> state. 207 * <ul> 208 * <li>While in the <em>Started</em> state, the internal player engine calls 209 * a user supplied OnBufferingUpdateListener.onBufferingUpdate() callback 210 * method if a OnBufferingUpdateListener has been registered beforehand 211 * via {@link #setOnBufferingUpdateListener(OnBufferingUpdateListener)}. 212 * This callback allows applications to keep track of the buffering status 213 * while streaming audio/video.</li> 214 * <li>Calling {@link #start()} has not effect 215 * on a MediaPlayer object that is already in the <em>Started</em> state.</li> 216 * </ul> 217 * </li> 218 * <li>Playback can be paused and stopped, and the current playback position 219 * can be adjusted. Playback can be paused via {@link #pause()}. When the call to 220 * {@link #pause()} returns, the MediaPlayer object enters the 221 * <em>Paused</em> state. Note that the transition from the <em>Started</em> 222 * state to the <em>Paused</em> state and vice versa happens 223 * asynchronously in the player engine. It may take some time before 224 * the state is updated in calls to {@link #isPlaying()}, and it can be 225 * a number of seconds in the case of streamed content. 226 * <ul> 227 * <li>Calling {@link #start()} to resume playback for a paused 228 * MediaPlayer object, and the resumed playback 229 * position is the same as where it was paused. When the call to 230 * {@link #start()} returns, the paused MediaPlayer object goes back to 231 * the <em>Started</em> state.</li> 232 * <li>Calling {@link #pause()} has no effect on 233 * a MediaPlayer object that is already in the <em>Paused</em> state.</li> 234 * </ul> 235 * </li> 236 * <li>Calling {@link #stop()} stops playback and causes a 237 * MediaPlayer in the <em>Started</em>, <em>Paused</em>, <em>Prepared 238 * </em> or <em>PlaybackCompleted</em> state to enter the 239 * <em>Stopped</em> state. 240 * <ul> 241 * <li>Once in the <em>Stopped</em> state, playback cannot be started 242 * until {@link #prepare()} or {@link #prepareAsync()} are called to set 243 * the MediaPlayer object to the <em>Prepared</em> state again.</li> 244 * <li>Calling {@link #stop()} has no effect on a MediaPlayer 245 * object that is already in the <em>Stopped</em> state.</li> 246 * </ul> 247 * </li> 248 * <li>The playback position can be adjusted with a call to 249 * {@link #seekTo(int)}. 250 * <ul> 251 * <li>Although the asynchronuous {@link #seekTo(int)} 252 * call returns right way, the actual seek operation may take a while to 253 * finish, especially for audio/video being streamed. When the actual 254 * seek operation completes, the internal player engine calls a user 255 * supplied OnSeekComplete.onSeekComplete() if an OnSeekCompleteListener 256 * has been registered beforehand via 257 * {@link #setOnSeekCompleteListener(OnSeekCompleteListener)}.</li> 258 * <li>Please 259 * note that {@link #seekTo(int)} can also be called in the other states, 260 * such as <em>Prepared</em>, <em>Paused</em> and <em>PlaybackCompleted 261 * </em> state.</li> 262 * <li>Furthermore, the actual current playback position 263 * can be retrieved with a call to {@link #getCurrentPosition()}, which 264 * is helpful for applications such as a Music player that need to keep 265 * track of the playback progress.</li> 266 * </ul> 267 * </li> 268 * <li>When the playback reaches the end of stream, the playback completes. 269 * <ul> 270 * <li>If the looping mode was being set to <var>true</var>with 271 * {@link #setLooping(boolean)}, the MediaPlayer object shall remain in 272 * the <em>Started</em> state.</li> 273 * <li>If the looping mode was set to <var>false 274 * </var>, the player engine calls a user supplied callback method, 275 * OnCompletion.onCompletion(), if a OnCompletionListener is registered 276 * beforehand via {@link #setOnCompletionListener(OnCompletionListener)}. 277 * The invoke of the callback signals that the object is now in the <em> 278 * PlaybackCompleted</em> state.</li> 279 * <li>While in the <em>PlaybackCompleted</em> 280 * state, calling {@link #start()} can restart the playback from the 281 * beginning of the audio/video source.</li> 282 * </ul> 283 * 284 * 285 * <a name="Valid_and_Invalid_States"></a> 286 * <h3>Valid and invalid states</h3> 287 * 288 * <table border="0" cellspacing="0" cellpadding="0"> 289 * <tr><td>Method Name </p></td> 290 * <td>Valid Sates </p></td> 291 * <td>Invalid States </p></td> 292 * <td>Comments </p></td></tr> 293 * <tr><td>attachAuxEffect </p></td> 294 * <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted} </p></td> 295 * <td>{Idle, Error} </p></td> 296 * <td>This method must be called after setDataSource. 297 * Calling it does not change the object state. </p></td></tr> 298 * <tr><td>getAudioSessionId </p></td> 299 * <td>any </p></td> 300 * <td>{} </p></td> 301 * <td>This method can be called in any state and calling it does not change 302 * the object state. </p></td></tr> 303 * <tr><td>getCurrentPosition </p></td> 304 * <td>{Idle, Initialized, Prepared, Started, Paused, Stopped, 305 * PlaybackCompleted} </p></td> 306 * <td>{Error}</p></td> 307 * <td>Successful invoke of this method in a valid state does not change the 308 * state. Calling this method in an invalid state transfers the object 309 * to the <em>Error</em> state. </p></td></tr> 310 * <tr><td>getDuration </p></td> 311 * <td>{Prepared, Started, Paused, Stopped, PlaybackCompleted} </p></td> 312 * <td>{Idle, Initialized, Error} </p></td> 313 * <td>Successful invoke of this method in a valid state does not change the 314 * state. Calling this method in an invalid state transfers the object 315 * to the <em>Error</em> state. </p></td></tr> 316 * <tr><td>getVideoHeight </p></td> 317 * <td>{Idle, Initialized, Prepared, Started, Paused, Stopped, 318 * PlaybackCompleted}</p></td> 319 * <td>{Error}</p></td> 320 * <td>Successful invoke of this method in a valid state does not change the 321 * state. Calling this method in an invalid state transfers the object 322 * to the <em>Error</em> state. </p></td></tr> 323 * <tr><td>getVideoWidth </p></td> 324 * <td>{Idle, Initialized, Prepared, Started, Paused, Stopped, 325 * PlaybackCompleted}</p></td> 326 * <td>{Error}</p></td> 327 * <td>Successful invoke of this method in a valid state does not change 328 * the state. Calling this method in an invalid state transfers the 329 * object to the <em>Error</em> state. </p></td></tr> 330 * <tr><td>isPlaying </p></td> 331 * <td>{Idle, Initialized, Prepared, Started, Paused, Stopped, 332 * PlaybackCompleted}</p></td> 333 * <td>{Error}</p></td> 334 * <td>Successful invoke of this method in a valid state does not change 335 * the state. Calling this method in an invalid state transfers the 336 * object to the <em>Error</em> state. </p></td></tr> 337 * <tr><td>pause </p></td> 338 * <td>{Started, Paused, PlaybackCompleted}</p></td> 339 * <td>{Idle, Initialized, Prepared, Stopped, Error}</p></td> 340 * <td>Successful invoke of this method in a valid state transfers the 341 * object to the <em>Paused</em> state. Calling this method in an 342 * invalid state transfers the object to the <em>Error</em> state.</p></td></tr> 343 * <tr><td>prepare </p></td> 344 * <td>{Initialized, Stopped} </p></td> 345 * <td>{Idle, Prepared, Started, Paused, PlaybackCompleted, Error} </p></td> 346 * <td>Successful invoke of this method in a valid state transfers the 347 * object to the <em>Prepared</em> state. Calling this method in an 348 * invalid state throws an IllegalStateException.</p></td></tr> 349 * <tr><td>prepareAsync </p></td> 350 * <td>{Initialized, Stopped} </p></td> 351 * <td>{Idle, Prepared, Started, Paused, PlaybackCompleted, Error} </p></td> 352 * <td>Successful invoke of this method in a valid state transfers the 353 * object to the <em>Preparing</em> state. Calling this method in an 354 * invalid state throws an IllegalStateException.</p></td></tr> 355 * <tr><td>release </p></td> 356 * <td>any </p></td> 357 * <td>{} </p></td> 358 * <td>After {@link #release()}, the object is no longer available. </p></td></tr> 359 * <tr><td>reset </p></td> 360 * <td>{Idle, Initialized, Prepared, Started, Paused, Stopped, 361 * PlaybackCompleted, Error}</p></td> 362 * <td>{}</p></td> 363 * <td>After {@link #reset()}, the object is like being just created.</p></td></tr> 364 * <tr><td>seekTo </p></td> 365 * <td>{Prepared, Started, Paused, PlaybackCompleted} </p></td> 366 * <td>{Idle, Initialized, Stopped, Error}</p></td> 367 * <td>Successful invoke of this method in a valid state does not change 368 * the state. Calling this method in an invalid state transfers the 369 * object to the <em>Error</em> state. </p></td></tr> 370 * <tr><td>setAudioSessionId </p></td> 371 * <td>{Idle} </p></td> 372 * <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted, 373 * Error} </p></td> 374 * <td>This method must be called in idle state as the audio session ID must be known before 375 * calling setDataSource. Calling it does not change the object state. </p></td></tr> 376 * <tr><td>setAudioStreamType </p></td> 377 * <td>{Idle, Initialized, Stopped, Prepared, Started, Paused, 378 * PlaybackCompleted}</p></td> 379 * <td>{Error}</p></td> 380 * <td>Successful invoke of this method does not change the state. In order for the 381 * target audio stream type to become effective, this method must be called before 382 * prepare() or prepareAsync().</p></td></tr> 383 * <tr><td>setAuxEffectSendLevel </p></td> 384 * <td>any</p></td> 385 * <td>{} </p></td> 386 * <td>Calling this method does not change the object state. </p></td></tr> 387 * <tr><td>setDataSource </p></td> 388 * <td>{Idle} </p></td> 389 * <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted, 390 * Error} </p></td> 391 * <td>Successful invoke of this method in a valid state transfers the 392 * object to the <em>Initialized</em> state. Calling this method in an 393 * invalid state throws an IllegalStateException.</p></td></tr> 394 * <tr><td>setDisplay </p></td> 395 * <td>any </p></td> 396 * <td>{} </p></td> 397 * <td>This method can be called in any state and calling it does not change 398 * the object state. </p></td></tr> 399 * <tr><td>setSurface </p></td> 400 * <td>any </p></td> 401 * <td>{} </p></td> 402 * <td>This method can be called in any state and calling it does not change 403 * the object state. </p></td></tr> 404 * <tr><td>setVideoScalingMode </p></td> 405 * <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted} </p></td> 406 * <td>{Idle, Error}</p></td> 407 * <td>Successful invoke of this method does not change the state.</p></td></tr> 408 * <tr><td>setLooping </p></td> 409 * <td>{Idle, Initialized, Stopped, Prepared, Started, Paused, 410 * PlaybackCompleted}</p></td> 411 * <td>{Error}</p></td> 412 * <td>Successful invoke of this method in a valid state does not change 413 * the state. Calling this method in an 414 * invalid state transfers the object to the <em>Error</em> state.</p></td></tr> 415 * <tr><td>isLooping </p></td> 416 * <td>any </p></td> 417 * <td>{} </p></td> 418 * <td>This method can be called in any state and calling it does not change 419 * the object state. </p></td></tr> 420 * <tr><td>setOnBufferingUpdateListener </p></td> 421 * <td>any </p></td> 422 * <td>{} </p></td> 423 * <td>This method can be called in any state and calling it does not change 424 * the object state. </p></td></tr> 425 * <tr><td>setOnCompletionListener </p></td> 426 * <td>any </p></td> 427 * <td>{} </p></td> 428 * <td>This method can be called in any state and calling it does not change 429 * the object state. </p></td></tr> 430 * <tr><td>setOnErrorListener </p></td> 431 * <td>any </p></td> 432 * <td>{} </p></td> 433 * <td>This method can be called in any state and calling it does not change 434 * the object state. </p></td></tr> 435 * <tr><td>setOnPreparedListener </p></td> 436 * <td>any </p></td> 437 * <td>{} </p></td> 438 * <td>This method can be called in any state and calling it does not change 439 * the object state. </p></td></tr> 440 * <tr><td>setOnSeekCompleteListener </p></td> 441 * <td>any </p></td> 442 * <td>{} </p></td> 443 * <td>This method can be called in any state and calling it does not change 444 * the object state. </p></td></tr> 445 * <tr><td>setScreenOnWhilePlaying</></td> 446 * <td>any </p></td> 447 * <td>{} </p></td> 448 * <td>This method can be called in any state and calling it does not change 449 * the object state. </p></td></tr> 450 * <tr><td>setVolume </p></td> 451 * <td>{Idle, Initialized, Stopped, Prepared, Started, Paused, 452 * PlaybackCompleted}</p></td> 453 * <td>{Error}</p></td> 454 * <td>Successful invoke of this method does not change the state. 455 * <tr><td>setWakeMode </p></td> 456 * <td>any </p></td> 457 * <td>{} </p></td> 458 * <td>This method can be called in any state and calling it does not change 459 * the object state.</p></td></tr> 460 * <tr><td>start </p></td> 461 * <td>{Prepared, Started, Paused, PlaybackCompleted}</p></td> 462 * <td>{Idle, Initialized, Stopped, Error}</p></td> 463 * <td>Successful invoke of this method in a valid state transfers the 464 * object to the <em>Started</em> state. Calling this method in an 465 * invalid state transfers the object to the <em>Error</em> state.</p></td></tr> 466 * <tr><td>stop </p></td> 467 * <td>{Prepared, Started, Stopped, Paused, PlaybackCompleted}</p></td> 468 * <td>{Idle, Initialized, Error}</p></td> 469 * <td>Successful invoke of this method in a valid state transfers the 470 * object to the <em>Stopped</em> state. Calling this method in an 471 * invalid state transfers the object to the <em>Error</em> state.</p></td></tr> 472 * <tr><td>getTrackInfo </p></td> 473 * <td>{Prepared, Started, Stopped, Paused, PlaybackCompleted}</p></td> 474 * <td>{Idle, Initialized, Error}</p></td> 475 * <td>Successful invoke of this method does not change the state.</p></td></tr> 476 * <tr><td>addTimedTextSource </p></td> 477 * <td>{Prepared, Started, Stopped, Paused, PlaybackCompleted}</p></td> 478 * <td>{Idle, Initialized, Error}</p></td> 479 * <td>Successful invoke of this method does not change the state.</p></td></tr> 480 * <tr><td>selectTrack </p></td> 481 * <td>{Prepared, Started, Stopped, Paused, PlaybackCompleted}</p></td> 482 * <td>{Idle, Initialized, Error}</p></td> 483 * <td>Successful invoke of this method does not change the state.</p></td></tr> 484 * <tr><td>deselectTrack </p></td> 485 * <td>{Prepared, Started, Stopped, Paused, PlaybackCompleted}</p></td> 486 * <td>{Idle, Initialized, Error}</p></td> 487 * <td>Successful invoke of this method does not change the state.</p></td></tr> 488 * 489 * </table> 490 * 491 * <a name="Permissions"></a> 492 * <h3>Permissions</h3> 493 * <p>One may need to declare a corresponding WAKE_LOCK permission {@link 494 * android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 495 * element. 496 * 497 * <p>This class requires the {@link android.Manifest.permission#INTERNET} permission 498 * when used with network-based content. 499 * 500 * <a name="Callbacks"></a> 501 * <h3>Callbacks</h3> 502 * <p>Applications may want to register for informational and error 503 * events in order to be informed of some internal state update and 504 * possible runtime errors during playback or streaming. Registration for 505 * these events is done by properly setting the appropriate listeners (via calls 506 * to 507 * {@link #setOnPreparedListener(OnPreparedListener)}setOnPreparedListener, 508 * {@link #setOnVideoSizeChangedListener(OnVideoSizeChangedListener)}setOnVideoSizeChangedListener, 509 * {@link #setOnSeekCompleteListener(OnSeekCompleteListener)}setOnSeekCompleteListener, 510 * {@link #setOnCompletionListener(OnCompletionListener)}setOnCompletionListener, 511 * {@link #setOnBufferingUpdateListener(OnBufferingUpdateListener)}setOnBufferingUpdateListener, 512 * {@link #setOnInfoListener(OnInfoListener)}setOnInfoListener, 513 * {@link #setOnErrorListener(OnErrorListener)}setOnErrorListener, etc). 514 * In order to receive the respective callback 515 * associated with these listeners, applications are required to create 516 * MediaPlayer objects on a thread with its own Looper running (main UI 517 * thread by default has a Looper running). 518 * 519 */ 520public class MediaPlayer 521{ 522 /** 523 Constant to retrieve only the new metadata since the last 524 call. 525 // FIXME: unhide. 526 // FIXME: add link to getMetadata(boolean, boolean) 527 {@hide} 528 */ 529 public static final boolean METADATA_UPDATE_ONLY = true; 530 531 /** 532 Constant to retrieve all the metadata. 533 // FIXME: unhide. 534 // FIXME: add link to getMetadata(boolean, boolean) 535 {@hide} 536 */ 537 public static final boolean METADATA_ALL = false; 538 539 /** 540 Constant to enable the metadata filter during retrieval. 541 // FIXME: unhide. 542 // FIXME: add link to getMetadata(boolean, boolean) 543 {@hide} 544 */ 545 public static final boolean APPLY_METADATA_FILTER = true; 546 547 /** 548 Constant to disable the metadata filter during retrieval. 549 // FIXME: unhide. 550 // FIXME: add link to getMetadata(boolean, boolean) 551 {@hide} 552 */ 553 public static final boolean BYPASS_METADATA_FILTER = false; 554 555 static { 556 System.loadLibrary("media_jni"); 557 native_init(); 558 } 559 560 private final static String TAG = "MediaPlayer"; 561 // Name of the remote interface for the media player. Must be kept 562 // in sync with the 2nd parameter of the IMPLEMENT_META_INTERFACE 563 // macro invocation in IMediaPlayer.cpp 564 private final static String IMEDIA_PLAYER = "android.media.IMediaPlayer"; 565 566 private int mNativeContext; // accessed by native methods 567 private int mNativeSurfaceTexture; // accessed by native methods 568 private int mListenerContext; // accessed by native methods 569 private SurfaceHolder mSurfaceHolder; 570 private EventHandler mEventHandler; 571 private PowerManager.WakeLock mWakeLock = null; 572 private boolean mScreenOnWhilePlaying; 573 private boolean mStayAwake; 574 575 /** 576 * Default constructor. Consider using one of the create() methods for 577 * synchronously instantiating a MediaPlayer from a Uri or resource. 578 * <p>When done with the MediaPlayer, you should call {@link #release()}, 579 * to free the resources. If not released, too many MediaPlayer instances may 580 * result in an exception.</p> 581 */ 582 public MediaPlayer() { 583 584 Looper looper; 585 if ((looper = Looper.myLooper()) != null) { 586 mEventHandler = new EventHandler(this, looper); 587 } else if ((looper = Looper.getMainLooper()) != null) { 588 mEventHandler = new EventHandler(this, looper); 589 } else { 590 mEventHandler = null; 591 } 592 593 /* Native setup requires a weak reference to our object. 594 * It's easier to create it here than in C++. 595 */ 596 native_setup(new WeakReference<MediaPlayer>(this)); 597 } 598 599 /* 600 * Update the MediaPlayer SurfaceTexture. 601 * Call after setting a new display surface. 602 */ 603 private native void _setVideoSurface(Surface surface); 604 605 /* Do not change these values (starting with INVOKE_ID) without updating 606 * their counterparts in include/media/mediaplayer.h! 607 */ 608 private static final int INVOKE_ID_GET_TRACK_INFO = 1; 609 private static final int INVOKE_ID_ADD_EXTERNAL_SOURCE = 2; 610 private static final int INVOKE_ID_ADD_EXTERNAL_SOURCE_FD = 3; 611 private static final int INVOKE_ID_SELECT_TRACK = 4; 612 private static final int INVOKE_ID_DESELECT_TRACK = 5; 613 private static final int INVOKE_ID_SET_VIDEO_SCALE_MODE = 6; 614 615 /** 616 * Create a request parcel which can be routed to the native media 617 * player using {@link #invoke(Parcel, Parcel)}. The Parcel 618 * returned has the proper InterfaceToken set. The caller should 619 * not overwrite that token, i.e it can only append data to the 620 * Parcel. 621 * 622 * @return A parcel suitable to hold a request for the native 623 * player. 624 * {@hide} 625 */ 626 public Parcel newRequest() { 627 Parcel parcel = Parcel.obtain(); 628 parcel.writeInterfaceToken(IMEDIA_PLAYER); 629 return parcel; 630 } 631 632 /** 633 * Invoke a generic method on the native player using opaque 634 * parcels for the request and reply. Both payloads' format is a 635 * convention between the java caller and the native player. 636 * Must be called after setDataSource to make sure a native player 637 * exists. On failure, a RuntimeException is thrown. 638 * 639 * @param request Parcel with the data for the extension. The 640 * caller must use {@link #newRequest()} to get one. 641 * 642 * @param reply Output parcel with the data returned by the 643 * native player. 644 * {@hide} 645 */ 646 public void invoke(Parcel request, Parcel reply) { 647 int retcode = native_invoke(request, reply); 648 reply.setDataPosition(0); 649 if (retcode != 0) { 650 throw new RuntimeException("failure code: " + retcode); 651 } 652 } 653 654 /** 655 * Sets the {@link SurfaceHolder} to use for displaying the video 656 * portion of the media. 657 * 658 * Either a surface holder or surface must be set if a display or video sink 659 * is needed. Not calling this method or {@link #setSurface(Surface)} 660 * when playing back a video will result in only the audio track being played. 661 * A null surface holder or surface will result in only the audio track being 662 * played. 663 * 664 * @param sh the SurfaceHolder to use for video display 665 */ 666 public void setDisplay(SurfaceHolder sh) { 667 mSurfaceHolder = sh; 668 Surface surface; 669 if (sh != null) { 670 surface = sh.getSurface(); 671 } else { 672 surface = null; 673 } 674 _setVideoSurface(surface); 675 updateSurfaceScreenOn(); 676 } 677 678 /** 679 * Sets the {@link Surface} to be used as the sink for the video portion of 680 * the media. This is similar to {@link #setDisplay(SurfaceHolder)}, but 681 * does not support {@link #setScreenOnWhilePlaying(boolean)}. Setting a 682 * Surface will un-set any Surface or SurfaceHolder that was previously set. 683 * A null surface will result in only the audio track being played. 684 * 685 * If the Surface sends frames to a {@link SurfaceTexture}, the timestamps 686 * returned from {@link SurfaceTexture#getTimestamp()} will have an 687 * unspecified zero point. These timestamps cannot be directly compared 688 * between different media sources, different instances of the same media 689 * source, or multiple runs of the same program. The timestamp is normally 690 * monotonically increasing and is unaffected by time-of-day adjustments, 691 * but it is reset when the position is set. 692 * 693 * @param surface The {@link Surface} to be used for the video portion of 694 * the media. 695 */ 696 public void setSurface(Surface surface) { 697 if (mScreenOnWhilePlaying && surface != null) { 698 Log.w(TAG, "setScreenOnWhilePlaying(true) is ineffective for Surface"); 699 } 700 mSurfaceHolder = null; 701 _setVideoSurface(surface); 702 updateSurfaceScreenOn(); 703 } 704 705 /* Do not change these video scaling mode values below without updating 706 * their counterparts in system/window.h! Please do not forget to update 707 * {@link #isVideoScalingModeSupported} when new video scaling modes 708 * are added. 709 */ 710 /** 711 * Specifies a video scaling mode. The content is stretched to the 712 * surface rendering area. When the surface has the same aspect ratio 713 * as the content, the aspect ratio of the content is maintained; 714 * otherwise, the aspect ratio of the content is not maintained when video 715 * is being rendered. Unlike {@link #VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING}, 716 * there is no content cropping with this video scaling mode. 717 */ 718 public static final int VIDEO_SCALING_MODE_SCALE_TO_FIT = 1; 719 720 /** 721 * Specifies a video scaling mode. The content is scaled, maintaining 722 * its aspect ratio. The whole surface area is always used. When the 723 * aspect ratio of the content is the same as the surface, no content 724 * is cropped; otherwise, content is cropped to fit the surface. 725 */ 726 public static final int VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING = 2; 727 /** 728 * Sets video scaling mode. To make the target video scaling mode 729 * effective during playback, this method must be called after 730 * data source is set. If not called, the default video 731 * scaling mode is {@link #VIDEO_SCALING_MODE_SCALE_TO_FIT}. 732 * 733 * <p> The supported video scaling modes are: 734 * <ul> 735 * <li> {@link #VIDEO_SCALING_MODE_SCALE_TO_FIT} 736 * <li> {@link #VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING} 737 * </ul> 738 * 739 * @param mode target video scaling mode. Most be one of the supported 740 * video scaling modes; otherwise, IllegalArgumentException will be thrown. 741 * 742 * @see MediaPlayer#VIDEO_SCALING_MODE_SCALE_TO_FIT 743 * @see MediaPlayer#VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING 744 */ 745 public void setVideoScalingMode(int mode) { 746 if (!isVideoScalingModeSupported(mode)) { 747 final String msg = "Scaling mode " + mode + " is not supported"; 748 throw new IllegalArgumentException(msg); 749 } 750 Parcel request = Parcel.obtain(); 751 Parcel reply = Parcel.obtain(); 752 try { 753 request.writeInterfaceToken(IMEDIA_PLAYER); 754 request.writeInt(INVOKE_ID_SET_VIDEO_SCALE_MODE); 755 request.writeInt(mode); 756 invoke(request, reply); 757 } finally { 758 request.recycle(); 759 reply.recycle(); 760 } 761 } 762 763 /** 764 * Convenience method to create a MediaPlayer for a given Uri. 765 * On success, {@link #prepare()} will already have been called and must not be called again. 766 * <p>When done with the MediaPlayer, you should call {@link #release()}, 767 * to free the resources. If not released, too many MediaPlayer instances will 768 * result in an exception.</p> 769 * 770 * @param context the Context to use 771 * @param uri the Uri from which to get the datasource 772 * @return a MediaPlayer object, or null if creation failed 773 */ 774 public static MediaPlayer create(Context context, Uri uri) { 775 return create (context, uri, null); 776 } 777 778 /** 779 * Convenience method to create a MediaPlayer for a given Uri. 780 * On success, {@link #prepare()} will already have been called and must not be called again. 781 * <p>When done with the MediaPlayer, you should call {@link #release()}, 782 * to free the resources. If not released, too many MediaPlayer instances will 783 * result in an exception.</p> 784 * 785 * @param context the Context to use 786 * @param uri the Uri from which to get the datasource 787 * @param holder the SurfaceHolder to use for displaying the video 788 * @return a MediaPlayer object, or null if creation failed 789 */ 790 public static MediaPlayer create(Context context, Uri uri, SurfaceHolder holder) { 791 792 try { 793 MediaPlayer mp = new MediaPlayer(); 794 mp.setDataSource(context, uri); 795 if (holder != null) { 796 mp.setDisplay(holder); 797 } 798 mp.prepare(); 799 return mp; 800 } catch (IOException ex) { 801 Log.d(TAG, "create failed:", ex); 802 // fall through 803 } catch (IllegalArgumentException ex) { 804 Log.d(TAG, "create failed:", ex); 805 // fall through 806 } catch (SecurityException ex) { 807 Log.d(TAG, "create failed:", ex); 808 // fall through 809 } 810 811 return null; 812 } 813 814 // Note no convenience method to create a MediaPlayer with SurfaceTexture sink. 815 816 /** 817 * Convenience method to create a MediaPlayer for a given resource id. 818 * On success, {@link #prepare()} will already have been called and must not be called again. 819 * <p>When done with the MediaPlayer, you should call {@link #release()}, 820 * to free the resources. If not released, too many MediaPlayer instances will 821 * result in an exception.</p> 822 * 823 * @param context the Context to use 824 * @param resid the raw resource id (<var>R.raw.<something></var>) for 825 * the resource to use as the datasource 826 * @return a MediaPlayer object, or null if creation failed 827 */ 828 public static MediaPlayer create(Context context, int resid) { 829 try { 830 AssetFileDescriptor afd = context.getResources().openRawResourceFd(resid); 831 if (afd == null) return null; 832 833 MediaPlayer mp = new MediaPlayer(); 834 mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); 835 afd.close(); 836 mp.prepare(); 837 return mp; 838 } catch (IOException ex) { 839 Log.d(TAG, "create failed:", ex); 840 // fall through 841 } catch (IllegalArgumentException ex) { 842 Log.d(TAG, "create failed:", ex); 843 // fall through 844 } catch (SecurityException ex) { 845 Log.d(TAG, "create failed:", ex); 846 // fall through 847 } 848 return null; 849 } 850 851 /** 852 * Sets the data source as a content Uri. 853 * 854 * @param context the Context to use when resolving the Uri 855 * @param uri the Content URI of the data you want to play 856 * @throws IllegalStateException if it is called in an invalid state 857 */ 858 public void setDataSource(Context context, Uri uri) 859 throws IOException, IllegalArgumentException, SecurityException, IllegalStateException { 860 setDataSource(context, uri, null); 861 } 862 863 /** 864 * Sets the data source as a content Uri. 865 * 866 * @param context the Context to use when resolving the Uri 867 * @param uri the Content URI of the data you want to play 868 * @param headers the headers to be sent together with the request for the data 869 * @throws IllegalStateException if it is called in an invalid state 870 */ 871 public void setDataSource(Context context, Uri uri, Map<String, String> headers) 872 throws IOException, IllegalArgumentException, SecurityException, IllegalStateException { 873 disableProxyListener(); 874 875 String scheme = uri.getScheme(); 876 if(scheme == null || scheme.equals("file")) { 877 setDataSource(uri.getPath()); 878 return; 879 } 880 881 AssetFileDescriptor fd = null; 882 try { 883 ContentResolver resolver = context.getContentResolver(); 884 fd = resolver.openAssetFileDescriptor(uri, "r"); 885 if (fd == null) { 886 return; 887 } 888 // Note: using getDeclaredLength so that our behavior is the same 889 // as previous versions when the content provider is returning 890 // a full file. 891 if (fd.getDeclaredLength() < 0) { 892 setDataSource(fd.getFileDescriptor()); 893 } else { 894 setDataSource(fd.getFileDescriptor(), fd.getStartOffset(), fd.getDeclaredLength()); 895 } 896 return; 897 } catch (SecurityException ex) { 898 } catch (IOException ex) { 899 } finally { 900 if (fd != null) { 901 fd.close(); 902 } 903 } 904 905 Log.d(TAG, "Couldn't open file on client side, trying server side"); 906 907 setDataSource(uri.toString(), headers); 908 909 if (scheme.equalsIgnoreCase("http") 910 || scheme.equalsIgnoreCase("https")) { 911 setupProxyListener(context); 912 } 913 } 914 915 /** 916 * Sets the data source (file-path or http/rtsp URL) to use. 917 * 918 * @param path the path of the file, or the http/rtsp URL of the stream you want to play 919 * @throws IllegalStateException if it is called in an invalid state 920 * 921 * <p>When <code>path</code> refers to a local file, the file may actually be opened by a 922 * process other than the calling application. This implies that the pathname 923 * should be an absolute path (as any other process runs with unspecified current working 924 * directory), and that the pathname should reference a world-readable file. 925 * As an alternative, the application could first open the file for reading, 926 * and then use the file descriptor form {@link #setDataSource(FileDescriptor)}. 927 */ 928 public void setDataSource(String path) 929 throws IOException, IllegalArgumentException, SecurityException, IllegalStateException { 930 setDataSource(path, null, null); 931 } 932 933 /** 934 * Sets the data source (file-path or http/rtsp URL) to use. 935 * 936 * @param path the path of the file, or the http/rtsp URL of the stream you want to play 937 * @param headers the headers associated with the http request for the stream you want to play 938 * @throws IllegalStateException if it is called in an invalid state 939 * @hide pending API council 940 */ 941 public void setDataSource(String path, Map<String, String> headers) 942 throws IOException, IllegalArgumentException, SecurityException, IllegalStateException 943 { 944 String[] keys = null; 945 String[] values = null; 946 947 if (headers != null) { 948 keys = new String[headers.size()]; 949 values = new String[headers.size()]; 950 951 int i = 0; 952 for (Map.Entry<String, String> entry: headers.entrySet()) { 953 keys[i] = entry.getKey(); 954 values[i] = entry.getValue(); 955 ++i; 956 } 957 } 958 setDataSource(path, keys, values); 959 } 960 961 private void setDataSource(String path, String[] keys, String[] values) 962 throws IOException, IllegalArgumentException, SecurityException, IllegalStateException { 963 disableProxyListener(); 964 965 final Uri uri = Uri.parse(path); 966 if ("file".equals(uri.getScheme())) { 967 path = uri.getPath(); 968 } 969 970 final File file = new File(path); 971 if (file.exists()) { 972 FileInputStream is = new FileInputStream(file); 973 FileDescriptor fd = is.getFD(); 974 setDataSource(fd); 975 is.close(); 976 } else { 977 _setDataSource(path, keys, values); 978 } 979 } 980 981 private native void _setDataSource( 982 String path, String[] keys, String[] values) 983 throws IOException, IllegalArgumentException, SecurityException, IllegalStateException; 984 985 /** 986 * Sets the data source (FileDescriptor) to use. It is the caller's responsibility 987 * to close the file descriptor. It is safe to do so as soon as this call returns. 988 * 989 * @param fd the FileDescriptor for the file you want to play 990 * @throws IllegalStateException if it is called in an invalid state 991 */ 992 public void setDataSource(FileDescriptor fd) 993 throws IOException, IllegalArgumentException, IllegalStateException { 994 // intentionally less than LONG_MAX 995 setDataSource(fd, 0, 0x7ffffffffffffffL); 996 } 997 998 /** 999 * Sets the data source (FileDescriptor) to use. The FileDescriptor must be 1000 * seekable (N.B. a LocalSocket is not seekable). It is the caller's responsibility 1001 * to close the file descriptor. It is safe to do so as soon as this call returns. 1002 * 1003 * @param fd the FileDescriptor for the file you want to play 1004 * @param offset the offset into the file where the data to be played starts, in bytes 1005 * @param length the length in bytes of the data to be played 1006 * @throws IllegalStateException if it is called in an invalid state 1007 */ 1008 public void setDataSource(FileDescriptor fd, long offset, long length) 1009 throws IOException, IllegalArgumentException, IllegalStateException { 1010 disableProxyListener(); 1011 _setDataSource(fd, offset, length); 1012 } 1013 1014 private native void _setDataSource(FileDescriptor fd, long offset, long length) 1015 throws IOException, IllegalArgumentException, IllegalStateException; 1016 1017 /** 1018 * Prepares the player for playback, synchronously. 1019 * 1020 * After setting the datasource and the display surface, you need to either 1021 * call prepare() or prepareAsync(). For files, it is OK to call prepare(), 1022 * which blocks until MediaPlayer is ready for playback. 1023 * 1024 * @throws IllegalStateException if it is called in an invalid state 1025 */ 1026 public native void prepare() throws IOException, IllegalStateException; 1027 1028 /** 1029 * Prepares the player for playback, asynchronously. 1030 * 1031 * After setting the datasource and the display surface, you need to either 1032 * call prepare() or prepareAsync(). For streams, you should call prepareAsync(), 1033 * which returns immediately, rather than blocking until enough data has been 1034 * buffered. 1035 * 1036 * @throws IllegalStateException if it is called in an invalid state 1037 */ 1038 public native void prepareAsync() throws IllegalStateException; 1039 1040 /** 1041 * Starts or resumes playback. If playback had previously been paused, 1042 * playback will continue from where it was paused. If playback had 1043 * been stopped, or never started before, playback will start at the 1044 * beginning. 1045 * 1046 * @throws IllegalStateException if it is called in an invalid state 1047 */ 1048 public void start() throws IllegalStateException { 1049 stayAwake(true); 1050 _start(); 1051 } 1052 1053 private native void _start() throws IllegalStateException; 1054 1055 /** 1056 * Stops playback after playback has been stopped or paused. 1057 * 1058 * @throws IllegalStateException if the internal player engine has not been 1059 * initialized. 1060 */ 1061 public void stop() throws IllegalStateException { 1062 stayAwake(false); 1063 _stop(); 1064 } 1065 1066 private native void _stop() throws IllegalStateException; 1067 1068 /** 1069 * Pauses playback. Call start() to resume. 1070 * 1071 * @throws IllegalStateException if the internal player engine has not been 1072 * initialized. 1073 */ 1074 public void pause() throws IllegalStateException { 1075 stayAwake(false); 1076 _pause(); 1077 } 1078 1079 private native void _pause() throws IllegalStateException; 1080 1081 /** 1082 * Set the low-level power management behavior for this MediaPlayer. This 1083 * can be used when the MediaPlayer is not playing through a SurfaceHolder 1084 * set with {@link #setDisplay(SurfaceHolder)} and thus can use the 1085 * high-level {@link #setScreenOnWhilePlaying(boolean)} feature. 1086 * 1087 * <p>This function has the MediaPlayer access the low-level power manager 1088 * service to control the device's power usage while playing is occurring. 1089 * The parameter is a combination of {@link android.os.PowerManager} wake flags. 1090 * Use of this method requires {@link android.Manifest.permission#WAKE_LOCK} 1091 * permission. 1092 * By default, no attempt is made to keep the device awake during playback. 1093 * 1094 * @param context the Context to use 1095 * @param mode the power/wake mode to set 1096 * @see android.os.PowerManager 1097 */ 1098 public void setWakeMode(Context context, int mode) { 1099 boolean washeld = false; 1100 if (mWakeLock != null) { 1101 if (mWakeLock.isHeld()) { 1102 washeld = true; 1103 mWakeLock.release(); 1104 } 1105 mWakeLock = null; 1106 } 1107 1108 PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); 1109 mWakeLock = pm.newWakeLock(mode|PowerManager.ON_AFTER_RELEASE, MediaPlayer.class.getName()); 1110 mWakeLock.setReferenceCounted(false); 1111 if (washeld) { 1112 mWakeLock.acquire(); 1113 } 1114 } 1115 1116 /** 1117 * Control whether we should use the attached SurfaceHolder to keep the 1118 * screen on while video playback is occurring. This is the preferred 1119 * method over {@link #setWakeMode} where possible, since it doesn't 1120 * require that the application have permission for low-level wake lock 1121 * access. 1122 * 1123 * @param screenOn Supply true to keep the screen on, false to allow it 1124 * to turn off. 1125 */ 1126 public void setScreenOnWhilePlaying(boolean screenOn) { 1127 if (mScreenOnWhilePlaying != screenOn) { 1128 if (screenOn && mSurfaceHolder == null) { 1129 Log.w(TAG, "setScreenOnWhilePlaying(true) is ineffective without a SurfaceHolder"); 1130 } 1131 mScreenOnWhilePlaying = screenOn; 1132 updateSurfaceScreenOn(); 1133 } 1134 } 1135 1136 private void stayAwake(boolean awake) { 1137 if (mWakeLock != null) { 1138 if (awake && !mWakeLock.isHeld()) { 1139 mWakeLock.acquire(); 1140 } else if (!awake && mWakeLock.isHeld()) { 1141 mWakeLock.release(); 1142 } 1143 } 1144 mStayAwake = awake; 1145 updateSurfaceScreenOn(); 1146 } 1147 1148 private void updateSurfaceScreenOn() { 1149 if (mSurfaceHolder != null) { 1150 mSurfaceHolder.setKeepScreenOn(mScreenOnWhilePlaying && mStayAwake); 1151 } 1152 } 1153 1154 /** 1155 * Returns the width of the video. 1156 * 1157 * @return the width of the video, or 0 if there is no video, 1158 * no display surface was set, or the width has not been determined 1159 * yet. The OnVideoSizeChangedListener can be registered via 1160 * {@link #setOnVideoSizeChangedListener(OnVideoSizeChangedListener)} 1161 * to provide a notification when the width is available. 1162 */ 1163 public native int getVideoWidth(); 1164 1165 /** 1166 * Returns the height of the video. 1167 * 1168 * @return the height of the video, or 0 if there is no video, 1169 * no display surface was set, or the height has not been determined 1170 * yet. The OnVideoSizeChangedListener can be registered via 1171 * {@link #setOnVideoSizeChangedListener(OnVideoSizeChangedListener)} 1172 * to provide a notification when the height is available. 1173 */ 1174 public native int getVideoHeight(); 1175 1176 /** 1177 * Checks whether the MediaPlayer is playing. 1178 * 1179 * @return true if currently playing, false otherwise 1180 * @throws IllegalStateException if the internal player engine has not been 1181 * initialized or has been released. 1182 */ 1183 public native boolean isPlaying(); 1184 1185 /** 1186 * Seeks to specified time position. 1187 * 1188 * @param msec the offset in milliseconds from the start to seek to 1189 * @throws IllegalStateException if the internal player engine has not been 1190 * initialized 1191 */ 1192 public native void seekTo(int msec) throws IllegalStateException; 1193 1194 /** 1195 * Gets the current playback position. 1196 * 1197 * @return the current position in milliseconds 1198 */ 1199 public native int getCurrentPosition(); 1200 1201 /** 1202 * Gets the duration of the file. 1203 * 1204 * @return the duration in milliseconds, if no duration is available 1205 * (for example, if streaming live content), -1 is returned. 1206 */ 1207 public native int getDuration(); 1208 1209 /** 1210 * Gets the media metadata. 1211 * 1212 * @param update_only controls whether the full set of available 1213 * metadata is returned or just the set that changed since the 1214 * last call. See {@see #METADATA_UPDATE_ONLY} and {@see 1215 * #METADATA_ALL}. 1216 * 1217 * @param apply_filter if true only metadata that matches the 1218 * filter is returned. See {@see #APPLY_METADATA_FILTER} and {@see 1219 * #BYPASS_METADATA_FILTER}. 1220 * 1221 * @return The metadata, possibly empty. null if an error occured. 1222 // FIXME: unhide. 1223 * {@hide} 1224 */ 1225 public Metadata getMetadata(final boolean update_only, 1226 final boolean apply_filter) { 1227 Parcel reply = Parcel.obtain(); 1228 Metadata data = new Metadata(); 1229 1230 if (!native_getMetadata(update_only, apply_filter, reply)) { 1231 reply.recycle(); 1232 return null; 1233 } 1234 1235 // Metadata takes over the parcel, don't recycle it unless 1236 // there is an error. 1237 if (!data.parse(reply)) { 1238 reply.recycle(); 1239 return null; 1240 } 1241 return data; 1242 } 1243 1244 /** 1245 * Set a filter for the metadata update notification and update 1246 * retrieval. The caller provides 2 set of metadata keys, allowed 1247 * and blocked. The blocked set always takes precedence over the 1248 * allowed one. 1249 * Metadata.MATCH_ALL and Metadata.MATCH_NONE are 2 sets available as 1250 * shorthands to allow/block all or no metadata. 1251 * 1252 * By default, there is no filter set. 1253 * 1254 * @param allow Is the set of metadata the client is interested 1255 * in receiving new notifications for. 1256 * @param block Is the set of metadata the client is not interested 1257 * in receiving new notifications for. 1258 * @return The call status code. 1259 * 1260 // FIXME: unhide. 1261 * {@hide} 1262 */ 1263 public int setMetadataFilter(Set<Integer> allow, Set<Integer> block) { 1264 // Do our serialization manually instead of calling 1265 // Parcel.writeArray since the sets are made of the same type 1266 // we avoid paying the price of calling writeValue (used by 1267 // writeArray) which burns an extra int per element to encode 1268 // the type. 1269 Parcel request = newRequest(); 1270 1271 // The parcel starts already with an interface token. There 1272 // are 2 filters. Each one starts with a 4bytes number to 1273 // store the len followed by a number of int (4 bytes as well) 1274 // representing the metadata type. 1275 int capacity = request.dataSize() + 4 * (1 + allow.size() + 1 + block.size()); 1276 1277 if (request.dataCapacity() < capacity) { 1278 request.setDataCapacity(capacity); 1279 } 1280 1281 request.writeInt(allow.size()); 1282 for(Integer t: allow) { 1283 request.writeInt(t); 1284 } 1285 request.writeInt(block.size()); 1286 for(Integer t: block) { 1287 request.writeInt(t); 1288 } 1289 return native_setMetadataFilter(request); 1290 } 1291 1292 /** 1293 * Set the MediaPlayer to start when this MediaPlayer finishes playback 1294 * (i.e. reaches the end of the stream). 1295 * The media framework will attempt to transition from this player to 1296 * the next as seamlessly as possible. The next player can be set at 1297 * any time before completion. The next player must be prepared by the 1298 * app, and the application should not call start() on it. 1299 * The next MediaPlayer must be different from 'this'. An exception 1300 * will be thrown if next == this. 1301 * The application may call setNextMediaPlayer(null) to indicate no 1302 * next player should be started at the end of playback. 1303 * If the current player is looping, it will keep looping and the next 1304 * player will not be started. 1305 * 1306 * @param next the player to start after this one completes playback. 1307 * 1308 */ 1309 public native void setNextMediaPlayer(MediaPlayer next); 1310 1311 /** 1312 * Releases resources associated with this MediaPlayer object. 1313 * It is considered good practice to call this method when you're 1314 * done using the MediaPlayer. In particular, whenever an Activity 1315 * of an application is paused (its onPause() method is called), 1316 * or stopped (its onStop() method is called), this method should be 1317 * invoked to release the MediaPlayer object, unless the application 1318 * has a special need to keep the object around. In addition to 1319 * unnecessary resources (such as memory and instances of codecs) 1320 * being held, failure to call this method immediately if a 1321 * MediaPlayer object is no longer needed may also lead to 1322 * continuous battery consumption for mobile devices, and playback 1323 * failure for other applications if no multiple instances of the 1324 * same codec are supported on a device. Even if multiple instances 1325 * of the same codec are supported, some performance degradation 1326 * may be expected when unnecessary multiple instances are used 1327 * at the same time. 1328 */ 1329 public void release() { 1330 stayAwake(false); 1331 updateSurfaceScreenOn(); 1332 mOnPreparedListener = null; 1333 mOnBufferingUpdateListener = null; 1334 mOnCompletionListener = null; 1335 mOnSeekCompleteListener = null; 1336 mOnErrorListener = null; 1337 mOnInfoListener = null; 1338 mOnVideoSizeChangedListener = null; 1339 mOnTimedTextListener = null; 1340 mOnSubtitleDataListener = null; 1341 _release(); 1342 } 1343 1344 private native void _release(); 1345 1346 /** 1347 * Resets the MediaPlayer to its uninitialized state. After calling 1348 * this method, you will have to initialize it again by setting the 1349 * data source and calling prepare(). 1350 */ 1351 public void reset() { 1352 stayAwake(false); 1353 _reset(); 1354 // make sure none of the listeners get called anymore 1355 mEventHandler.removeCallbacksAndMessages(null); 1356 1357 disableProxyListener(); 1358 } 1359 1360 private native void _reset(); 1361 1362 /** 1363 * Sets the audio stream type for this MediaPlayer. See {@link AudioManager} 1364 * for a list of stream types. Must call this method before prepare() or 1365 * prepareAsync() in order for the target stream type to become effective 1366 * thereafter. 1367 * 1368 * @param streamtype the audio stream type 1369 * @see android.media.AudioManager 1370 */ 1371 public native void setAudioStreamType(int streamtype); 1372 1373 /** 1374 * Sets the player to be looping or non-looping. 1375 * 1376 * @param looping whether to loop or not 1377 */ 1378 public native void setLooping(boolean looping); 1379 1380 /** 1381 * Checks whether the MediaPlayer is looping or non-looping. 1382 * 1383 * @return true if the MediaPlayer is currently looping, false otherwise 1384 */ 1385 public native boolean isLooping(); 1386 1387 /** 1388 * Sets the volume on this player. 1389 * This API is recommended for balancing the output of audio streams 1390 * within an application. Unless you are writing an application to 1391 * control user settings, this API should be used in preference to 1392 * {@link AudioManager#setStreamVolume(int, int, int)} which sets the volume of ALL streams of 1393 * a particular type. Note that the passed volume values are raw scalars in range 0.0 to 1.0. 1394 * UI controls should be scaled logarithmically. 1395 * 1396 * @param leftVolume left volume scalar 1397 * @param rightVolume right volume scalar 1398 */ 1399 /* 1400 * FIXME: Merge this into javadoc comment above when setVolume(float) is not @hide. 1401 * The single parameter form below is preferred if the channel volumes don't need 1402 * to be set independently. 1403 */ 1404 public native void setVolume(float leftVolume, float rightVolume); 1405 1406 /** 1407 * Similar, excepts sets volume of all channels to same value. 1408 * @hide 1409 */ 1410 public void setVolume(float volume) { 1411 setVolume(volume, volume); 1412 } 1413 1414 /** 1415 * Sets the audio session ID. 1416 * 1417 * @param sessionId the audio session ID. 1418 * The audio session ID is a system wide unique identifier for the audio stream played by 1419 * this MediaPlayer instance. 1420 * The primary use of the audio session ID is to associate audio effects to a particular 1421 * instance of MediaPlayer: if an audio session ID is provided when creating an audio effect, 1422 * this effect will be applied only to the audio content of media players within the same 1423 * audio session and not to the output mix. 1424 * When created, a MediaPlayer instance automatically generates its own audio session ID. 1425 * However, it is possible to force this player to be part of an already existing audio session 1426 * by calling this method. 1427 * This method must be called before one of the overloaded <code> setDataSource </code> methods. 1428 * @throws IllegalStateException if it is called in an invalid state 1429 */ 1430 public native void setAudioSessionId(int sessionId) throws IllegalArgumentException, IllegalStateException; 1431 1432 /** 1433 * Returns the audio session ID. 1434 * 1435 * @return the audio session ID. {@see #setAudioSessionId(int)} 1436 * Note that the audio session ID is 0 only if a problem occured when the MediaPlayer was contructed. 1437 */ 1438 public native int getAudioSessionId(); 1439 1440 /** 1441 * Attaches an auxiliary effect to the player. A typical auxiliary effect is a reverberation 1442 * effect which can be applied on any sound source that directs a certain amount of its 1443 * energy to this effect. This amount is defined by setAuxEffectSendLevel(). 1444 * {@see #setAuxEffectSendLevel(float)}. 1445 * <p>After creating an auxiliary effect (e.g. 1446 * {@link android.media.audiofx.EnvironmentalReverb}), retrieve its ID with 1447 * {@link android.media.audiofx.AudioEffect#getId()} and use it when calling this method 1448 * to attach the player to the effect. 1449 * <p>To detach the effect from the player, call this method with a null effect id. 1450 * <p>This method must be called after one of the overloaded <code> setDataSource </code> 1451 * methods. 1452 * @param effectId system wide unique id of the effect to attach 1453 */ 1454 public native void attachAuxEffect(int effectId); 1455 1456 1457 /** 1458 * Sets the send level of the player to the attached auxiliary effect 1459 * {@see #attachAuxEffect(int)}. The level value range is 0 to 1.0. 1460 * <p>By default the send level is 0, so even if an effect is attached to the player 1461 * this method must be called for the effect to be applied. 1462 * <p>Note that the passed level value is a raw scalar. UI controls should be scaled 1463 * logarithmically: the gain applied by audio framework ranges from -72dB to 0dB, 1464 * so an appropriate conversion from linear UI input x to level is: 1465 * x == 0 -> level = 0 1466 * 0 < x <= R -> level = 10^(72*(x-R)/20/R) 1467 * @param level send level scalar 1468 */ 1469 public native void setAuxEffectSendLevel(float level); 1470 1471 /* 1472 * @param request Parcel destinated to the media player. The 1473 * Interface token must be set to the IMediaPlayer 1474 * one to be routed correctly through the system. 1475 * @param reply[out] Parcel that will contain the reply. 1476 * @return The status code. 1477 */ 1478 private native final int native_invoke(Parcel request, Parcel reply); 1479 1480 1481 /* 1482 * @param update_only If true fetch only the set of metadata that have 1483 * changed since the last invocation of getMetadata. 1484 * The set is built using the unfiltered 1485 * notifications the native player sent to the 1486 * MediaPlayerService during that period of 1487 * time. If false, all the metadatas are considered. 1488 * @param apply_filter If true, once the metadata set has been built based on 1489 * the value update_only, the current filter is applied. 1490 * @param reply[out] On return contains the serialized 1491 * metadata. Valid only if the call was successful. 1492 * @return The status code. 1493 */ 1494 private native final boolean native_getMetadata(boolean update_only, 1495 boolean apply_filter, 1496 Parcel reply); 1497 1498 /* 1499 * @param request Parcel with the 2 serialized lists of allowed 1500 * metadata types followed by the one to be 1501 * dropped. Each list starts with an integer 1502 * indicating the number of metadata type elements. 1503 * @return The status code. 1504 */ 1505 private native final int native_setMetadataFilter(Parcel request); 1506 1507 private static native final void native_init(); 1508 private native final void native_setup(Object mediaplayer_this); 1509 private native final void native_finalize(); 1510 1511 /** 1512 * Class for MediaPlayer to return each audio/video/subtitle track's metadata. 1513 * 1514 * @see android.media.MediaPlayer#getTrackInfo 1515 */ 1516 static public class TrackInfo implements Parcelable { 1517 /** 1518 * Gets the track type. 1519 * @return TrackType which indicates if the track is video, audio, timed text. 1520 */ 1521 public int getTrackType() { 1522 return mTrackType; 1523 } 1524 1525 /** 1526 * Gets the language code of the track. 1527 * @return a language code in either way of ISO-639-1 or ISO-639-2. 1528 * When the language is unknown or could not be determined, 1529 * ISO-639-2 language code, "und", is returned. 1530 */ 1531 public String getLanguage() { 1532 String language = mFormat.getString(MediaFormat.KEY_LANGUAGE); 1533 return language == null ? "und" : language; 1534 } 1535 1536 /** 1537 * Gets the {@link MediaFormat} of the track. If the format is 1538 * unknown or could not be determined, null is returned. 1539 */ 1540 public MediaFormat getFormat() { 1541 if (mTrackType == MEDIA_TRACK_TYPE_TIMEDTEXT) { 1542 return mFormat; 1543 } 1544 return null; 1545 } 1546 1547 public static final int MEDIA_TRACK_TYPE_UNKNOWN = 0; 1548 public static final int MEDIA_TRACK_TYPE_VIDEO = 1; 1549 public static final int MEDIA_TRACK_TYPE_AUDIO = 2; 1550 public static final int MEDIA_TRACK_TYPE_TIMEDTEXT = 3; 1551 /** @hide */ 1552 public static final int MEDIA_TRACK_TYPE_SUBTITLE = 4; 1553 1554 final int mTrackType; 1555 final MediaFormat mFormat; 1556 1557 TrackInfo(Parcel in) { 1558 mTrackType = in.readInt(); 1559 // TODO: parcel in the full MediaFormat 1560 String language = in.readString(); 1561 1562 if (mTrackType == MEDIA_TRACK_TYPE_TIMEDTEXT) { 1563 mFormat = MediaFormat.createSubtitleFormat( 1564 MEDIA_MIMETYPE_TEXT_SUBRIP, language); 1565 } else { 1566 mFormat = new MediaFormat(); 1567 mFormat.setString(MediaFormat.KEY_LANGUAGE, language); 1568 } 1569 } 1570 1571 /** 1572 * {@inheritDoc} 1573 */ 1574 @Override 1575 public int describeContents() { 1576 return 0; 1577 } 1578 1579 /** 1580 * {@inheritDoc} 1581 */ 1582 @Override 1583 public void writeToParcel(Parcel dest, int flags) { 1584 dest.writeInt(mTrackType); 1585 dest.writeString(getLanguage()); 1586 } 1587 1588 /** 1589 * Used to read a TrackInfo from a Parcel. 1590 */ 1591 static final Parcelable.Creator<TrackInfo> CREATOR 1592 = new Parcelable.Creator<TrackInfo>() { 1593 @Override 1594 public TrackInfo createFromParcel(Parcel in) { 1595 return new TrackInfo(in); 1596 } 1597 1598 @Override 1599 public TrackInfo[] newArray(int size) { 1600 return new TrackInfo[size]; 1601 } 1602 }; 1603 1604 }; 1605 1606 /** 1607 * Returns an array of track information. 1608 * 1609 * @return Array of track info. The total number of tracks is the array length. 1610 * Must be called again if an external timed text source has been added after any of the 1611 * addTimedTextSource methods are called. 1612 * @throws IllegalStateException if it is called in an invalid state. 1613 */ 1614 public TrackInfo[] getTrackInfo() throws IllegalStateException { 1615 Parcel request = Parcel.obtain(); 1616 Parcel reply = Parcel.obtain(); 1617 try { 1618 request.writeInterfaceToken(IMEDIA_PLAYER); 1619 request.writeInt(INVOKE_ID_GET_TRACK_INFO); 1620 invoke(request, reply); 1621 TrackInfo trackInfo[] = reply.createTypedArray(TrackInfo.CREATOR); 1622 return trackInfo; 1623 } finally { 1624 request.recycle(); 1625 reply.recycle(); 1626 } 1627 } 1628 1629 /* Do not change these values without updating their counterparts 1630 * in include/media/stagefright/MediaDefs.h and media/libstagefright/MediaDefs.cpp! 1631 */ 1632 /** 1633 * MIME type for SubRip (SRT) container. Used in addTimedTextSource APIs. 1634 */ 1635 public static final String MEDIA_MIMETYPE_TEXT_SUBRIP = "application/x-subrip"; 1636 1637 /* 1638 * A helper function to check if the mime type is supported by media framework. 1639 */ 1640 private static boolean availableMimeTypeForExternalSource(String mimeType) { 1641 if (mimeType == MEDIA_MIMETYPE_TEXT_SUBRIP) { 1642 return true; 1643 } 1644 return false; 1645 } 1646 1647 /* TODO: Limit the total number of external timed text source to a reasonable number. 1648 */ 1649 /** 1650 * Adds an external timed text source file. 1651 * 1652 * Currently supported format is SubRip with the file extension .srt, case insensitive. 1653 * Note that a single external timed text source may contain multiple tracks in it. 1654 * One can find the total number of available tracks using {@link #getTrackInfo()} to see what 1655 * additional tracks become available after this method call. 1656 * 1657 * @param path The file path of external timed text source file. 1658 * @param mimeType The mime type of the file. Must be one of the mime types listed above. 1659 * @throws IOException if the file cannot be accessed or is corrupted. 1660 * @throws IllegalArgumentException if the mimeType is not supported. 1661 * @throws IllegalStateException if called in an invalid state. 1662 */ 1663 public void addTimedTextSource(String path, String mimeType) 1664 throws IOException, IllegalArgumentException, IllegalStateException { 1665 if (!availableMimeTypeForExternalSource(mimeType)) { 1666 final String msg = "Illegal mimeType for timed text source: " + mimeType; 1667 throw new IllegalArgumentException(msg); 1668 } 1669 1670 File file = new File(path); 1671 if (file.exists()) { 1672 FileInputStream is = new FileInputStream(file); 1673 FileDescriptor fd = is.getFD(); 1674 addTimedTextSource(fd, mimeType); 1675 is.close(); 1676 } else { 1677 // We do not support the case where the path is not a file. 1678 throw new IOException(path); 1679 } 1680 } 1681 1682 /** 1683 * Adds an external timed text source file (Uri). 1684 * 1685 * Currently supported format is SubRip with the file extension .srt, case insensitive. 1686 * Note that a single external timed text source may contain multiple tracks in it. 1687 * One can find the total number of available tracks using {@link #getTrackInfo()} to see what 1688 * additional tracks become available after this method call. 1689 * 1690 * @param context the Context to use when resolving the Uri 1691 * @param uri the Content URI of the data you want to play 1692 * @param mimeType The mime type of the file. Must be one of the mime types listed above. 1693 * @throws IOException if the file cannot be accessed or is corrupted. 1694 * @throws IllegalArgumentException if the mimeType is not supported. 1695 * @throws IllegalStateException if called in an invalid state. 1696 */ 1697 public void addTimedTextSource(Context context, Uri uri, String mimeType) 1698 throws IOException, IllegalArgumentException, IllegalStateException { 1699 String scheme = uri.getScheme(); 1700 if(scheme == null || scheme.equals("file")) { 1701 addTimedTextSource(uri.getPath(), mimeType); 1702 return; 1703 } 1704 1705 AssetFileDescriptor fd = null; 1706 try { 1707 ContentResolver resolver = context.getContentResolver(); 1708 fd = resolver.openAssetFileDescriptor(uri, "r"); 1709 if (fd == null) { 1710 return; 1711 } 1712 addTimedTextSource(fd.getFileDescriptor(), mimeType); 1713 return; 1714 } catch (SecurityException ex) { 1715 } catch (IOException ex) { 1716 } finally { 1717 if (fd != null) { 1718 fd.close(); 1719 } 1720 } 1721 } 1722 1723 /** 1724 * Adds an external timed text source file (FileDescriptor). 1725 * 1726 * It is the caller's responsibility to close the file descriptor. 1727 * It is safe to do so as soon as this call returns. 1728 * 1729 * Currently supported format is SubRip. Note that a single external timed text source may 1730 * contain multiple tracks in it. One can find the total number of available tracks 1731 * using {@link #getTrackInfo()} to see what additional tracks become available 1732 * after this method call. 1733 * 1734 * @param fd the FileDescriptor for the file you want to play 1735 * @param mimeType The mime type of the file. Must be one of the mime types listed above. 1736 * @throws IllegalArgumentException if the mimeType is not supported. 1737 * @throws IllegalStateException if called in an invalid state. 1738 */ 1739 public void addTimedTextSource(FileDescriptor fd, String mimeType) 1740 throws IllegalArgumentException, IllegalStateException { 1741 // intentionally less than LONG_MAX 1742 addTimedTextSource(fd, 0, 0x7ffffffffffffffL, mimeType); 1743 } 1744 1745 /** 1746 * Adds an external timed text file (FileDescriptor). 1747 * 1748 * It is the caller's responsibility to close the file descriptor. 1749 * It is safe to do so as soon as this call returns. 1750 * 1751 * Currently supported format is SubRip. Note that a single external timed text source may 1752 * contain multiple tracks in it. One can find the total number of available tracks 1753 * using {@link #getTrackInfo()} to see what additional tracks become available 1754 * after this method call. 1755 * 1756 * @param fd the FileDescriptor for the file you want to play 1757 * @param offset the offset into the file where the data to be played starts, in bytes 1758 * @param length the length in bytes of the data to be played 1759 * @param mimeType The mime type of the file. Must be one of the mime types listed above. 1760 * @throws IllegalArgumentException if the mimeType is not supported. 1761 * @throws IllegalStateException if called in an invalid state. 1762 */ 1763 public void addTimedTextSource(FileDescriptor fd, long offset, long length, String mimeType) 1764 throws IllegalArgumentException, IllegalStateException { 1765 if (!availableMimeTypeForExternalSource(mimeType)) { 1766 throw new IllegalArgumentException("Illegal mimeType for timed text source: " + mimeType); 1767 } 1768 1769 Parcel request = Parcel.obtain(); 1770 Parcel reply = Parcel.obtain(); 1771 try { 1772 request.writeInterfaceToken(IMEDIA_PLAYER); 1773 request.writeInt(INVOKE_ID_ADD_EXTERNAL_SOURCE_FD); 1774 request.writeFileDescriptor(fd); 1775 request.writeLong(offset); 1776 request.writeLong(length); 1777 request.writeString(mimeType); 1778 invoke(request, reply); 1779 } finally { 1780 request.recycle(); 1781 reply.recycle(); 1782 } 1783 } 1784 1785 /** 1786 * Selects a track. 1787 * <p> 1788 * If a MediaPlayer is in invalid state, it throws an IllegalStateException exception. 1789 * If a MediaPlayer is in <em>Started</em> state, the selected track is presented immediately. 1790 * If a MediaPlayer is not in Started state, it just marks the track to be played. 1791 * </p> 1792 * <p> 1793 * In any valid state, if it is called multiple times on the same type of track (ie. Video, 1794 * Audio, Timed Text), the most recent one will be chosen. 1795 * </p> 1796 * <p> 1797 * The first audio and video tracks are selected by default if available, even though 1798 * this method is not called. However, no timed text track will be selected until 1799 * this function is called. 1800 * </p> 1801 * <p> 1802 * Currently, only timed text tracks or audio tracks can be selected via this method. 1803 * In addition, the support for selecting an audio track at runtime is pretty limited 1804 * in that an audio track can only be selected in the <em>Prepared</em> state. 1805 * </p> 1806 * @param index the index of the track to be selected. The valid range of the index 1807 * is 0..total number of track - 1. The total number of tracks as well as the type of 1808 * each individual track can be found by calling {@link #getTrackInfo()} method. 1809 * @throws IllegalStateException if called in an invalid state. 1810 * 1811 * @see android.media.MediaPlayer#getTrackInfo 1812 */ 1813 public void selectTrack(int index) throws IllegalStateException { 1814 selectOrDeselectTrack(index, true /* select */); 1815 } 1816 1817 /** 1818 * Deselect a track. 1819 * <p> 1820 * Currently, the track must be a timed text track and no audio or video tracks can be 1821 * deselected. If the timed text track identified by index has not been 1822 * selected before, it throws an exception. 1823 * </p> 1824 * @param index the index of the track to be deselected. The valid range of the index 1825 * is 0..total number of tracks - 1. The total number of tracks as well as the type of 1826 * each individual track can be found by calling {@link #getTrackInfo()} method. 1827 * @throws IllegalStateException if called in an invalid state. 1828 * 1829 * @see android.media.MediaPlayer#getTrackInfo 1830 */ 1831 public void deselectTrack(int index) throws IllegalStateException { 1832 selectOrDeselectTrack(index, false /* select */); 1833 } 1834 1835 private void selectOrDeselectTrack(int index, boolean select) 1836 throws IllegalStateException { 1837 Parcel request = Parcel.obtain(); 1838 Parcel reply = Parcel.obtain(); 1839 try { 1840 request.writeInterfaceToken(IMEDIA_PLAYER); 1841 request.writeInt(select? INVOKE_ID_SELECT_TRACK: INVOKE_ID_DESELECT_TRACK); 1842 request.writeInt(index); 1843 invoke(request, reply); 1844 } finally { 1845 request.recycle(); 1846 reply.recycle(); 1847 } 1848 } 1849 1850 1851 /** 1852 * @param reply Parcel with audio/video duration info for battery 1853 tracking usage 1854 * @return The status code. 1855 * {@hide} 1856 */ 1857 public native static int native_pullBatteryData(Parcel reply); 1858 1859 /** 1860 * Sets the target UDP re-transmit endpoint for the low level player. 1861 * Generally, the address portion of the endpoint is an IP multicast 1862 * address, although a unicast address would be equally valid. When a valid 1863 * retransmit endpoint has been set, the media player will not decode and 1864 * render the media presentation locally. Instead, the player will attempt 1865 * to re-multiplex its media data using the Android@Home RTP profile and 1866 * re-transmit to the target endpoint. Receiver devices (which may be 1867 * either the same as the transmitting device or different devices) may 1868 * instantiate, prepare, and start a receiver player using a setDataSource 1869 * URL of the form... 1870 * 1871 * aahRX://<multicastIP>:<port> 1872 * 1873 * to receive, decode and render the re-transmitted content. 1874 * 1875 * setRetransmitEndpoint may only be called before setDataSource has been 1876 * called; while the player is in the Idle state. 1877 * 1878 * @param endpoint the address and UDP port of the re-transmission target or 1879 * null if no re-transmission is to be performed. 1880 * @throws IllegalStateException if it is called in an invalid state 1881 * @throws IllegalArgumentException if the retransmit endpoint is supplied, 1882 * but invalid. 1883 * 1884 * {@hide} pending API council 1885 */ 1886 public void setRetransmitEndpoint(InetSocketAddress endpoint) 1887 throws IllegalStateException, IllegalArgumentException 1888 { 1889 String addrString = null; 1890 int port = 0; 1891 1892 if (null != endpoint) { 1893 addrString = endpoint.getAddress().getHostAddress(); 1894 port = endpoint.getPort(); 1895 } 1896 1897 int ret = native_setRetransmitEndpoint(addrString, port); 1898 if (ret != 0) { 1899 throw new IllegalArgumentException("Illegal re-transmit endpoint; native ret " + ret); 1900 } 1901 } 1902 1903 private native final int native_setRetransmitEndpoint(String addrString, int port); 1904 1905 @Override 1906 protected void finalize() { native_finalize(); } 1907 1908 /* Do not change these values without updating their counterparts 1909 * in include/media/mediaplayer.h! 1910 */ 1911 private static final int MEDIA_NOP = 0; // interface test message 1912 private static final int MEDIA_PREPARED = 1; 1913 private static final int MEDIA_PLAYBACK_COMPLETE = 2; 1914 private static final int MEDIA_BUFFERING_UPDATE = 3; 1915 private static final int MEDIA_SEEK_COMPLETE = 4; 1916 private static final int MEDIA_SET_VIDEO_SIZE = 5; 1917 private static final int MEDIA_TIMED_TEXT = 99; 1918 private static final int MEDIA_ERROR = 100; 1919 private static final int MEDIA_INFO = 200; 1920 private static final int MEDIA_SUBTITLE_DATA = 201; 1921 1922 private class EventHandler extends Handler 1923 { 1924 private MediaPlayer mMediaPlayer; 1925 1926 public EventHandler(MediaPlayer mp, Looper looper) { 1927 super(looper); 1928 mMediaPlayer = mp; 1929 } 1930 1931 @Override 1932 public void handleMessage(Message msg) { 1933 if (mMediaPlayer.mNativeContext == 0) { 1934 Log.w(TAG, "mediaplayer went away with unhandled events"); 1935 return; 1936 } 1937 switch(msg.what) { 1938 case MEDIA_PREPARED: 1939 if (mOnPreparedListener != null) 1940 mOnPreparedListener.onPrepared(mMediaPlayer); 1941 return; 1942 1943 case MEDIA_PLAYBACK_COMPLETE: 1944 if (mOnCompletionListener != null) 1945 mOnCompletionListener.onCompletion(mMediaPlayer); 1946 stayAwake(false); 1947 return; 1948 1949 case MEDIA_BUFFERING_UPDATE: 1950 if (mOnBufferingUpdateListener != null) 1951 mOnBufferingUpdateListener.onBufferingUpdate(mMediaPlayer, msg.arg1); 1952 return; 1953 1954 case MEDIA_SEEK_COMPLETE: 1955 if (mOnSeekCompleteListener != null) 1956 mOnSeekCompleteListener.onSeekComplete(mMediaPlayer); 1957 return; 1958 1959 case MEDIA_SET_VIDEO_SIZE: 1960 if (mOnVideoSizeChangedListener != null) 1961 mOnVideoSizeChangedListener.onVideoSizeChanged(mMediaPlayer, msg.arg1, msg.arg2); 1962 return; 1963 1964 case MEDIA_ERROR: 1965 Log.e(TAG, "Error (" + msg.arg1 + "," + msg.arg2 + ")"); 1966 boolean error_was_handled = false; 1967 if (mOnErrorListener != null) { 1968 error_was_handled = mOnErrorListener.onError(mMediaPlayer, msg.arg1, msg.arg2); 1969 } 1970 if (mOnCompletionListener != null && ! error_was_handled) { 1971 mOnCompletionListener.onCompletion(mMediaPlayer); 1972 } 1973 stayAwake(false); 1974 return; 1975 1976 case MEDIA_INFO: 1977 if (msg.arg1 != MEDIA_INFO_VIDEO_TRACK_LAGGING) { 1978 Log.i(TAG, "Info (" + msg.arg1 + "," + msg.arg2 + ")"); 1979 } 1980 if (mOnInfoListener != null) { 1981 mOnInfoListener.onInfo(mMediaPlayer, msg.arg1, msg.arg2); 1982 } 1983 // No real default action so far. 1984 return; 1985 case MEDIA_TIMED_TEXT: 1986 if (mOnTimedTextListener == null) 1987 return; 1988 if (msg.obj == null) { 1989 mOnTimedTextListener.onTimedText(mMediaPlayer, null); 1990 } else { 1991 if (msg.obj instanceof Parcel) { 1992 Parcel parcel = (Parcel)msg.obj; 1993 TimedText text = new TimedText(parcel); 1994 parcel.recycle(); 1995 mOnTimedTextListener.onTimedText(mMediaPlayer, text); 1996 } 1997 } 1998 return; 1999 2000 case MEDIA_SUBTITLE_DATA: 2001 if (mOnSubtitleDataListener == null) { 2002 return; 2003 } 2004 if (msg.obj instanceof Parcel) { 2005 Parcel parcel = (Parcel) msg.obj; 2006 SubtitleData data = new SubtitleData(parcel); 2007 parcel.recycle(); 2008 mOnSubtitleDataListener.onSubtitleData(mMediaPlayer, data); 2009 } 2010 return; 2011 2012 case MEDIA_NOP: // interface test message - ignore 2013 break; 2014 2015 default: 2016 Log.e(TAG, "Unknown message type " + msg.what); 2017 return; 2018 } 2019 } 2020 } 2021 2022 /* 2023 * Called from native code when an interesting event happens. This method 2024 * just uses the EventHandler system to post the event back to the main app thread. 2025 * We use a weak reference to the original MediaPlayer object so that the native 2026 * code is safe from the object disappearing from underneath it. (This is 2027 * the cookie passed to native_setup().) 2028 */ 2029 private static void postEventFromNative(Object mediaplayer_ref, 2030 int what, int arg1, int arg2, Object obj) 2031 { 2032 MediaPlayer mp = (MediaPlayer)((WeakReference)mediaplayer_ref).get(); 2033 if (mp == null) { 2034 return; 2035 } 2036 2037 if (what == MEDIA_INFO && arg1 == MEDIA_INFO_STARTED_AS_NEXT) { 2038 // this acquires the wakelock if needed, and sets the client side state 2039 mp.start(); 2040 } 2041 if (mp.mEventHandler != null) { 2042 Message m = mp.mEventHandler.obtainMessage(what, arg1, arg2, obj); 2043 mp.mEventHandler.sendMessage(m); 2044 } 2045 } 2046 2047 /** 2048 * Interface definition for a callback to be invoked when the media 2049 * source is ready for playback. 2050 */ 2051 public interface OnPreparedListener 2052 { 2053 /** 2054 * Called when the media file is ready for playback. 2055 * 2056 * @param mp the MediaPlayer that is ready for playback 2057 */ 2058 void onPrepared(MediaPlayer mp); 2059 } 2060 2061 /** 2062 * Register a callback to be invoked when the media source is ready 2063 * for playback. 2064 * 2065 * @param listener the callback that will be run 2066 */ 2067 public void setOnPreparedListener(OnPreparedListener listener) 2068 { 2069 mOnPreparedListener = listener; 2070 } 2071 2072 private OnPreparedListener mOnPreparedListener; 2073 2074 /** 2075 * Interface definition for a callback to be invoked when playback of 2076 * a media source has completed. 2077 */ 2078 public interface OnCompletionListener 2079 { 2080 /** 2081 * Called when the end of a media source is reached during playback. 2082 * 2083 * @param mp the MediaPlayer that reached the end of the file 2084 */ 2085 void onCompletion(MediaPlayer mp); 2086 } 2087 2088 /** 2089 * Register a callback to be invoked when the end of a media source 2090 * has been reached during playback. 2091 * 2092 * @param listener the callback that will be run 2093 */ 2094 public void setOnCompletionListener(OnCompletionListener listener) 2095 { 2096 mOnCompletionListener = listener; 2097 } 2098 2099 private OnCompletionListener mOnCompletionListener; 2100 2101 /** 2102 * Interface definition of a callback to be invoked indicating buffering 2103 * status of a media resource being streamed over the network. 2104 */ 2105 public interface OnBufferingUpdateListener 2106 { 2107 /** 2108 * Called to update status in buffering a media stream received through 2109 * progressive HTTP download. The received buffering percentage 2110 * indicates how much of the content has been buffered or played. 2111 * For example a buffering update of 80 percent when half the content 2112 * has already been played indicates that the next 30 percent of the 2113 * content to play has been buffered. 2114 * 2115 * @param mp the MediaPlayer the update pertains to 2116 * @param percent the percentage (0-100) of the content 2117 * that has been buffered or played thus far 2118 */ 2119 void onBufferingUpdate(MediaPlayer mp, int percent); 2120 } 2121 2122 /** 2123 * Register a callback to be invoked when the status of a network 2124 * stream's buffer has changed. 2125 * 2126 * @param listener the callback that will be run. 2127 */ 2128 public void setOnBufferingUpdateListener(OnBufferingUpdateListener listener) 2129 { 2130 mOnBufferingUpdateListener = listener; 2131 } 2132 2133 private OnBufferingUpdateListener mOnBufferingUpdateListener; 2134 2135 /** 2136 * Interface definition of a callback to be invoked indicating 2137 * the completion of a seek operation. 2138 */ 2139 public interface OnSeekCompleteListener 2140 { 2141 /** 2142 * Called to indicate the completion of a seek operation. 2143 * 2144 * @param mp the MediaPlayer that issued the seek operation 2145 */ 2146 public void onSeekComplete(MediaPlayer mp); 2147 } 2148 2149 /** 2150 * Register a callback to be invoked when a seek operation has been 2151 * completed. 2152 * 2153 * @param listener the callback that will be run 2154 */ 2155 public void setOnSeekCompleteListener(OnSeekCompleteListener listener) 2156 { 2157 mOnSeekCompleteListener = listener; 2158 } 2159 2160 private OnSeekCompleteListener mOnSeekCompleteListener; 2161 2162 /** 2163 * Interface definition of a callback to be invoked when the 2164 * video size is first known or updated 2165 */ 2166 public interface OnVideoSizeChangedListener 2167 { 2168 /** 2169 * Called to indicate the video size 2170 * 2171 * The video size (width and height) could be 0 if there was no video, 2172 * no display surface was set, or the value was not determined yet. 2173 * 2174 * @param mp the MediaPlayer associated with this callback 2175 * @param width the width of the video 2176 * @param height the height of the video 2177 */ 2178 public void onVideoSizeChanged(MediaPlayer mp, int width, int height); 2179 } 2180 2181 /** 2182 * Register a callback to be invoked when the video size is 2183 * known or updated. 2184 * 2185 * @param listener the callback that will be run 2186 */ 2187 public void setOnVideoSizeChangedListener(OnVideoSizeChangedListener listener) 2188 { 2189 mOnVideoSizeChangedListener = listener; 2190 } 2191 2192 private OnVideoSizeChangedListener mOnVideoSizeChangedListener; 2193 2194 /** 2195 * Interface definition of a callback to be invoked when a 2196 * timed text is available for display. 2197 */ 2198 public interface OnTimedTextListener 2199 { 2200 /** 2201 * Called to indicate an avaliable timed text 2202 * 2203 * @param mp the MediaPlayer associated with this callback 2204 * @param text the timed text sample which contains the text 2205 * needed to be displayed and the display format. 2206 */ 2207 public void onTimedText(MediaPlayer mp, TimedText text); 2208 } 2209 2210 /** 2211 * Register a callback to be invoked when a timed text is available 2212 * for display. 2213 * 2214 * @param listener the callback that will be run 2215 */ 2216 public void setOnTimedTextListener(OnTimedTextListener listener) 2217 { 2218 mOnTimedTextListener = listener; 2219 } 2220 2221 private OnTimedTextListener mOnTimedTextListener; 2222 2223 /** 2224 * Interface definition of a callback to be invoked when a 2225 * track has data available. 2226 * 2227 * @hide 2228 */ 2229 public interface OnSubtitleDataListener 2230 { 2231 public void onSubtitleData(MediaPlayer mp, SubtitleData data); 2232 } 2233 2234 /** 2235 * Register a callback to be invoked when a track has data available. 2236 * 2237 * @param listener the callback that will be run 2238 * 2239 * @hide 2240 */ 2241 public void setOnSubtitleDataListener(OnSubtitleDataListener listener) 2242 { 2243 mOnSubtitleDataListener = listener; 2244 } 2245 2246 private OnSubtitleDataListener mOnSubtitleDataListener; 2247 2248 /* Do not change these values without updating their counterparts 2249 * in include/media/mediaplayer.h! 2250 */ 2251 /** Unspecified media player error. 2252 * @see android.media.MediaPlayer.OnErrorListener 2253 */ 2254 public static final int MEDIA_ERROR_UNKNOWN = 1; 2255 2256 /** Media server died. In this case, the application must release the 2257 * MediaPlayer object and instantiate a new one. 2258 * @see android.media.MediaPlayer.OnErrorListener 2259 */ 2260 public static final int MEDIA_ERROR_SERVER_DIED = 100; 2261 2262 /** The video is streamed and its container is not valid for progressive 2263 * playback i.e the video's index (e.g moov atom) is not at the start of the 2264 * file. 2265 * @see android.media.MediaPlayer.OnErrorListener 2266 */ 2267 public static final int MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK = 200; 2268 2269 /** File or network related operation errors. */ 2270 public static final int MEDIA_ERROR_IO = -1004; 2271 /** Bitstream is not conforming to the related coding standard or file spec. */ 2272 public static final int MEDIA_ERROR_MALFORMED = -1007; 2273 /** Bitstream is conforming to the related coding standard or file spec, but 2274 * the media framework does not support the feature. */ 2275 public static final int MEDIA_ERROR_UNSUPPORTED = -1010; 2276 /** Some operation takes too long to complete, usually more than 3-5 seconds. */ 2277 public static final int MEDIA_ERROR_TIMED_OUT = -110; 2278 2279 /** 2280 * Interface definition of a callback to be invoked when there 2281 * has been an error during an asynchronous operation (other errors 2282 * will throw exceptions at method call time). 2283 */ 2284 public interface OnErrorListener 2285 { 2286 /** 2287 * Called to indicate an error. 2288 * 2289 * @param mp the MediaPlayer the error pertains to 2290 * @param what the type of error that has occurred: 2291 * <ul> 2292 * <li>{@link #MEDIA_ERROR_UNKNOWN} 2293 * <li>{@link #MEDIA_ERROR_SERVER_DIED} 2294 * </ul> 2295 * @param extra an extra code, specific to the error. Typically 2296 * implementation dependent. 2297 * <ul> 2298 * <li>{@link #MEDIA_ERROR_IO} 2299 * <li>{@link #MEDIA_ERROR_MALFORMED} 2300 * <li>{@link #MEDIA_ERROR_UNSUPPORTED} 2301 * <li>{@link #MEDIA_ERROR_TIMED_OUT} 2302 * </ul> 2303 * @return True if the method handled the error, false if it didn't. 2304 * Returning false, or not having an OnErrorListener at all, will 2305 * cause the OnCompletionListener to be called. 2306 */ 2307 boolean onError(MediaPlayer mp, int what, int extra); 2308 } 2309 2310 /** 2311 * Register a callback to be invoked when an error has happened 2312 * during an asynchronous operation. 2313 * 2314 * @param listener the callback that will be run 2315 */ 2316 public void setOnErrorListener(OnErrorListener listener) 2317 { 2318 mOnErrorListener = listener; 2319 } 2320 2321 private OnErrorListener mOnErrorListener; 2322 2323 2324 /* Do not change these values without updating their counterparts 2325 * in include/media/mediaplayer.h! 2326 */ 2327 /** Unspecified media player info. 2328 * @see android.media.MediaPlayer.OnInfoListener 2329 */ 2330 public static final int MEDIA_INFO_UNKNOWN = 1; 2331 2332 /** The player was started because it was used as the next player for another 2333 * player, which just completed playback. 2334 * @see android.media.MediaPlayer.OnInfoListener 2335 * @hide 2336 */ 2337 public static final int MEDIA_INFO_STARTED_AS_NEXT = 2; 2338 2339 /** The player just pushed the very first video frame for rendering. 2340 * @see android.media.MediaPlayer.OnInfoListener 2341 */ 2342 public static final int MEDIA_INFO_VIDEO_RENDERING_START = 3; 2343 2344 /** The video is too complex for the decoder: it can't decode frames fast 2345 * enough. Possibly only the audio plays fine at this stage. 2346 * @see android.media.MediaPlayer.OnInfoListener 2347 */ 2348 public static final int MEDIA_INFO_VIDEO_TRACK_LAGGING = 700; 2349 2350 /** MediaPlayer is temporarily pausing playback internally in order to 2351 * buffer more data. 2352 * @see android.media.MediaPlayer.OnInfoListener 2353 */ 2354 public static final int MEDIA_INFO_BUFFERING_START = 701; 2355 2356 /** MediaPlayer is resuming playback after filling buffers. 2357 * @see android.media.MediaPlayer.OnInfoListener 2358 */ 2359 public static final int MEDIA_INFO_BUFFERING_END = 702; 2360 2361 /** Bad interleaving means that a media has been improperly interleaved or 2362 * not interleaved at all, e.g has all the video samples first then all the 2363 * audio ones. Video is playing but a lot of disk seeks may be happening. 2364 * @see android.media.MediaPlayer.OnInfoListener 2365 */ 2366 public static final int MEDIA_INFO_BAD_INTERLEAVING = 800; 2367 2368 /** The media cannot be seeked (e.g live stream) 2369 * @see android.media.MediaPlayer.OnInfoListener 2370 */ 2371 public static final int MEDIA_INFO_NOT_SEEKABLE = 801; 2372 2373 /** A new set of metadata is available. 2374 * @see android.media.MediaPlayer.OnInfoListener 2375 */ 2376 public static final int MEDIA_INFO_METADATA_UPDATE = 802; 2377 2378 /** Failed to handle timed text track properly. 2379 * @see android.media.MediaPlayer.OnInfoListener 2380 * 2381 * {@hide} 2382 */ 2383 public static final int MEDIA_INFO_TIMED_TEXT_ERROR = 900; 2384 2385 /** 2386 * Interface definition of a callback to be invoked to communicate some 2387 * info and/or warning about the media or its playback. 2388 */ 2389 public interface OnInfoListener 2390 { 2391 /** 2392 * Called to indicate an info or a warning. 2393 * 2394 * @param mp the MediaPlayer the info pertains to. 2395 * @param what the type of info or warning. 2396 * <ul> 2397 * <li>{@link #MEDIA_INFO_UNKNOWN} 2398 * <li>{@link #MEDIA_INFO_VIDEO_TRACK_LAGGING} 2399 * <li>{@link #MEDIA_INFO_VIDEO_RENDERING_START} 2400 * <li>{@link #MEDIA_INFO_BUFFERING_START} 2401 * <li>{@link #MEDIA_INFO_BUFFERING_END} 2402 * <li>{@link #MEDIA_INFO_BAD_INTERLEAVING} 2403 * <li>{@link #MEDIA_INFO_NOT_SEEKABLE} 2404 * <li>{@link #MEDIA_INFO_METADATA_UPDATE} 2405 * </ul> 2406 * @param extra an extra code, specific to the info. Typically 2407 * implementation dependent. 2408 * @return True if the method handled the info, false if it didn't. 2409 * Returning false, or not having an OnErrorListener at all, will 2410 * cause the info to be discarded. 2411 */ 2412 boolean onInfo(MediaPlayer mp, int what, int extra); 2413 } 2414 2415 /** 2416 * Register a callback to be invoked when an info/warning is available. 2417 * 2418 * @param listener the callback that will be run 2419 */ 2420 public void setOnInfoListener(OnInfoListener listener) 2421 { 2422 mOnInfoListener = listener; 2423 } 2424 2425 private OnInfoListener mOnInfoListener; 2426 2427 /* 2428 * Test whether a given video scaling mode is supported. 2429 */ 2430 private boolean isVideoScalingModeSupported(int mode) { 2431 return (mode == VIDEO_SCALING_MODE_SCALE_TO_FIT || 2432 mode == VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING); 2433 } 2434 2435 private Context mProxyContext = null; 2436 private ProxyReceiver mProxyReceiver = null; 2437 2438 private void setupProxyListener(Context context) { 2439 IntentFilter filter = new IntentFilter(); 2440 filter.addAction(Proxy.PROXY_CHANGE_ACTION); 2441 mProxyReceiver = new ProxyReceiver(); 2442 mProxyContext = context; 2443 2444 Intent currentProxy = 2445 context.getApplicationContext().registerReceiver(mProxyReceiver, filter); 2446 2447 if (currentProxy != null) { 2448 handleProxyBroadcast(currentProxy); 2449 } 2450 } 2451 2452 private void disableProxyListener() { 2453 if (mProxyReceiver == null) { 2454 return; 2455 } 2456 2457 Context appContext = mProxyContext.getApplicationContext(); 2458 if (appContext != null) { 2459 appContext.unregisterReceiver(mProxyReceiver); 2460 } 2461 2462 mProxyReceiver = null; 2463 mProxyContext = null; 2464 } 2465 2466 private void handleProxyBroadcast(Intent intent) { 2467 ProxyProperties props = 2468 (ProxyProperties)intent.getExtra(Proxy.EXTRA_PROXY_INFO); 2469 2470 if (props == null || props.getHost() == null) { 2471 updateProxyConfig(null); 2472 } else { 2473 updateProxyConfig(props); 2474 } 2475 } 2476 2477 private class ProxyReceiver extends BroadcastReceiver { 2478 @Override 2479 public void onReceive(Context context, Intent intent) { 2480 if (intent.getAction().equals(Proxy.PROXY_CHANGE_ACTION)) { 2481 handleProxyBroadcast(intent); 2482 } 2483 } 2484 } 2485 2486 private native void updateProxyConfig(ProxyProperties props); 2487} 2488