Hansong Zhang | 80cfa56 | 2018-04-26 12:26:49 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
| 17 | package com.android.music; |
| 18 | |
| 19 | import android.app.Activity; |
| 20 | import android.content.AsyncQueryHandler; |
| 21 | import android.content.ContentResolver; |
| 22 | import android.content.Context; |
| 23 | import android.content.Intent; |
| 24 | import android.database.Cursor; |
| 25 | import android.media.AudioManager; |
| 26 | import android.media.MediaPlayer; |
| 27 | import android.media.AudioManager.OnAudioFocusChangeListener; |
| 28 | import android.media.MediaPlayer.OnCompletionListener; |
| 29 | import android.media.MediaPlayer.OnErrorListener; |
| 30 | import android.media.MediaPlayer.OnPreparedListener; |
| 31 | import android.net.Uri; |
| 32 | import android.os.Bundle; |
| 33 | import android.os.Handler; |
| 34 | import android.provider.MediaStore; |
| 35 | import android.provider.OpenableColumns; |
| 36 | import android.text.TextUtils; |
| 37 | import android.util.Log; |
| 38 | import android.view.KeyEvent; |
| 39 | import android.view.Menu; |
| 40 | import android.view.MenuItem; |
| 41 | import android.view.View; |
| 42 | import android.view.Window; |
| 43 | import android.view.WindowManager; |
| 44 | import android.widget.ImageButton; |
| 45 | import android.widget.ProgressBar; |
| 46 | import android.widget.SeekBar; |
| 47 | import android.widget.TextView; |
| 48 | import android.widget.SeekBar.OnSeekBarChangeListener; |
| 49 | import android.widget.Toast; |
| 50 | |
| 51 | import java.io.IOException; |
| 52 | |
| 53 | /** |
| 54 | * Dialog that comes up in response to various music-related VIEW intents. |
| 55 | */ |
| 56 | public class AudioPreview |
| 57 | extends Activity implements OnPreparedListener, OnErrorListener, OnCompletionListener { |
| 58 | private final static String TAG = "AudioPreview"; |
| 59 | private PreviewPlayer mPlayer; |
| 60 | private TextView mTextLine1; |
| 61 | private TextView mTextLine2; |
| 62 | private TextView mLoadingText; |
| 63 | private SeekBar mSeekBar; |
| 64 | private Handler mProgressRefresher; |
| 65 | private boolean mSeeking = false; |
| 66 | private boolean mUiPaused = true; |
| 67 | private int mDuration; |
| 68 | private Uri mUri; |
| 69 | private long mMediaId = -1; |
| 70 | private static final int OPEN_IN_MUSIC = 1; |
| 71 | private AudioManager mAudioManager; |
| 72 | private boolean mPausedByTransientLossOfFocus; |
| 73 | |
| 74 | @Override |
| 75 | public void onCreate(Bundle icicle) { |
| 76 | super.onCreate(icicle); |
| 77 | |
| 78 | Intent intent = getIntent(); |
| 79 | if (intent == null) { |
| 80 | finish(); |
| 81 | return; |
| 82 | } |
| 83 | mUri = intent.getData(); |
| 84 | if (mUri == null) { |
| 85 | finish(); |
| 86 | return; |
| 87 | } |
| 88 | String scheme = mUri.getScheme(); |
| 89 | |
| 90 | setVolumeControlStream(AudioManager.STREAM_MUSIC); |
| 91 | requestWindowFeature(Window.FEATURE_NO_TITLE); |
| 92 | setContentView(R.layout.audiopreview); |
| 93 | |
| 94 | mTextLine1 = (TextView) findViewById(R.id.line1); |
| 95 | mTextLine2 = (TextView) findViewById(R.id.line2); |
| 96 | mLoadingText = (TextView) findViewById(R.id.loading); |
| 97 | if (scheme.equals("http")) { |
| 98 | String msg = getString(R.string.streamloadingtext, mUri.getHost()); |
| 99 | mLoadingText.setText(msg); |
| 100 | } else { |
| 101 | mLoadingText.setVisibility(View.GONE); |
| 102 | } |
| 103 | mSeekBar = (SeekBar) findViewById(R.id.progress); |
| 104 | mProgressRefresher = new Handler(); |
| 105 | mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); |
| 106 | |
| 107 | PreviewPlayer player = (PreviewPlayer) getLastNonConfigurationInstance(); |
| 108 | if (player == null) { |
| 109 | mPlayer = new PreviewPlayer(); |
| 110 | mPlayer.setActivity(this); |
| 111 | try { |
| 112 | mPlayer.setDataSourceAndPrepare(mUri); |
| 113 | } catch (Exception ex) { |
| 114 | // catch generic Exception, since we may be called with a media |
| 115 | // content URI, another content provider's URI, a file URI, |
| 116 | // an http URI, and there are different exceptions associated |
| 117 | // with failure to open each of those. |
| 118 | Log.d(TAG, "Failed to open file: " + ex); |
| 119 | Toast.makeText(this, R.string.playback_failed, Toast.LENGTH_SHORT).show(); |
| 120 | finish(); |
| 121 | return; |
| 122 | } |
| 123 | } else { |
| 124 | mPlayer = player; |
| 125 | mPlayer.setActivity(this); |
| 126 | // onResume will update the UI |
| 127 | } |
| 128 | |
| 129 | AsyncQueryHandler mAsyncQueryHandler = new AsyncQueryHandler(getContentResolver()) { |
| 130 | @Override |
| 131 | protected void onQueryComplete(int token, Object cookie, Cursor cursor) { |
| 132 | if (cursor != null && cursor.moveToFirst()) { |
| 133 | int titleIdx = cursor.getColumnIndex(MediaStore.Audio.Media.TITLE); |
| 134 | int artistIdx = cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST); |
| 135 | int idIdx = cursor.getColumnIndex(MediaStore.Audio.Media._ID); |
| 136 | int displaynameIdx = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME); |
| 137 | |
| 138 | if (idIdx >= 0) { |
| 139 | mMediaId = cursor.getLong(idIdx); |
| 140 | } |
| 141 | |
| 142 | if (titleIdx >= 0) { |
| 143 | String title = cursor.getString(titleIdx); |
| 144 | mTextLine1.setText(title); |
| 145 | if (artistIdx >= 0) { |
| 146 | String artist = cursor.getString(artistIdx); |
| 147 | mTextLine2.setText(artist); |
| 148 | } |
| 149 | } else if (displaynameIdx >= 0) { |
| 150 | String name = cursor.getString(displaynameIdx); |
| 151 | mTextLine1.setText(name); |
| 152 | } else { |
| 153 | // Couldn't find anything to display, what to do now? |
| 154 | Log.w(TAG, "Cursor had no names for us"); |
| 155 | } |
| 156 | } else { |
| 157 | Log.w(TAG, "empty cursor"); |
| 158 | } |
| 159 | |
| 160 | if (cursor != null) { |
| 161 | cursor.close(); |
| 162 | } |
| 163 | setNames(); |
| 164 | } |
| 165 | }; |
| 166 | |
| 167 | if (scheme.equals(ContentResolver.SCHEME_CONTENT)) { |
| 168 | if (mUri.getAuthority() == MediaStore.AUTHORITY) { |
| 169 | // try to get title and artist from the media content provider |
| 170 | mAsyncQueryHandler.startQuery(0, null, mUri, |
| 171 | new String[] {MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.ARTIST}, |
| 172 | null, null, null); |
| 173 | } else { |
| 174 | // Try to get the display name from another content provider. |
| 175 | // Don't specifically ask for the display name though, since the |
| 176 | // provider might not actually support that column. |
| 177 | mAsyncQueryHandler.startQuery(0, null, mUri, null, null, null, null); |
| 178 | } |
| 179 | } else if (scheme.equals("file")) { |
| 180 | // check if this file is in the media database (clicking on a download |
| 181 | // in the download manager might follow this path |
| 182 | String path = mUri.getPath(); |
| 183 | mAsyncQueryHandler.startQuery(0, null, MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, |
| 184 | new String[] {MediaStore.Audio.Media._ID, MediaStore.Audio.Media.TITLE, |
| 185 | MediaStore.Audio.Media.ARTIST}, |
| 186 | MediaStore.Audio.Media.DATA + "=?", new String[] {path}, null); |
| 187 | } else { |
| 188 | // We can't get metadata from the file/stream itself yet, because |
| 189 | // that API is hidden, so instead we display the URI being played |
| 190 | if (mPlayer.isPrepared()) { |
| 191 | setNames(); |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | @Override |
| 197 | public void onPause() { |
| 198 | super.onPause(); |
| 199 | mUiPaused = true; |
| 200 | if (mProgressRefresher != null) { |
| 201 | mProgressRefresher.removeCallbacksAndMessages(null); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | @Override |
| 206 | public void onResume() { |
| 207 | super.onResume(); |
| 208 | mUiPaused = false; |
| 209 | if (mPlayer.isPrepared()) { |
| 210 | showPostPrepareUI(); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | @Override |
| 215 | public Object onRetainNonConfigurationInstance() { |
| 216 | PreviewPlayer player = mPlayer; |
| 217 | mPlayer = null; |
| 218 | return player; |
| 219 | } |
| 220 | |
| 221 | @Override |
| 222 | public void onDestroy() { |
| 223 | stopPlayback(); |
| 224 | super.onDestroy(); |
| 225 | } |
| 226 | |
| 227 | private void stopPlayback() { |
| 228 | if (mProgressRefresher != null) { |
| 229 | mProgressRefresher.removeCallbacksAndMessages(null); |
| 230 | } |
| 231 | if (mPlayer != null) { |
| 232 | mPlayer.release(); |
| 233 | mPlayer = null; |
| 234 | mAudioManager.abandonAudioFocus(mAudioFocusListener); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | @Override |
| 239 | public void onUserLeaveHint() { |
| 240 | stopPlayback(); |
| 241 | finish(); |
| 242 | super.onUserLeaveHint(); |
| 243 | } |
| 244 | |
| 245 | public void onPrepared(MediaPlayer mp) { |
| 246 | if (isFinishing()) return; |
| 247 | mPlayer = (PreviewPlayer) mp; |
| 248 | setNames(); |
| 249 | mPlayer.start(); |
| 250 | showPostPrepareUI(); |
| 251 | } |
| 252 | |
| 253 | private void showPostPrepareUI() { |
| 254 | ProgressBar pb = (ProgressBar) findViewById(R.id.spinner); |
| 255 | pb.setVisibility(View.GONE); |
| 256 | mDuration = mPlayer.getDuration(); |
| 257 | if (mDuration != 0) { |
| 258 | mSeekBar.setMax(mDuration); |
| 259 | mSeekBar.setVisibility(View.VISIBLE); |
| 260 | if (!mSeeking) { |
| 261 | mSeekBar.setProgress(mPlayer.getCurrentPosition()); |
| 262 | } |
| 263 | } |
| 264 | mSeekBar.setOnSeekBarChangeListener(mSeekListener); |
| 265 | mLoadingText.setVisibility(View.GONE); |
| 266 | View v = findViewById(R.id.titleandbuttons); |
| 267 | v.setVisibility(View.VISIBLE); |
| 268 | mAudioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC, |
| 269 | AudioManager.AUDIOFOCUS_GAIN_TRANSIENT); |
| 270 | if (mProgressRefresher != null) { |
| 271 | mProgressRefresher.removeCallbacksAndMessages(null); |
| 272 | mProgressRefresher.postDelayed(new ProgressRefresher(), 200); |
| 273 | } |
| 274 | updatePlayPause(); |
| 275 | } |
| 276 | |
| 277 | private OnAudioFocusChangeListener mAudioFocusListener = new OnAudioFocusChangeListener() { |
| 278 | public void onAudioFocusChange(int focusChange) { |
| 279 | if (mPlayer == null) { |
| 280 | // this activity has handed its MediaPlayer off to the next activity |
| 281 | // (e.g. portrait/landscape switch) and should abandon its focus |
| 282 | mAudioManager.abandonAudioFocus(this); |
| 283 | return; |
| 284 | } |
| 285 | switch (focusChange) { |
| 286 | case AudioManager.AUDIOFOCUS_LOSS: |
| 287 | mPausedByTransientLossOfFocus = false; |
| 288 | mPlayer.pause(); |
| 289 | break; |
| 290 | case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT: |
| 291 | case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK: |
| 292 | if (mPlayer.isPlaying()) { |
| 293 | mPausedByTransientLossOfFocus = true; |
| 294 | mPlayer.pause(); |
| 295 | } |
| 296 | break; |
| 297 | case AudioManager.AUDIOFOCUS_GAIN: |
| 298 | if (mPausedByTransientLossOfFocus) { |
| 299 | mPausedByTransientLossOfFocus = false; |
| 300 | start(); |
| 301 | } |
| 302 | break; |
| 303 | } |
| 304 | updatePlayPause(); |
| 305 | } |
| 306 | }; |
| 307 | |
| 308 | private void start() { |
| 309 | mAudioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC, |
| 310 | AudioManager.AUDIOFOCUS_GAIN_TRANSIENT); |
| 311 | mPlayer.start(); |
| 312 | mProgressRefresher.postDelayed(new ProgressRefresher(), 200); |
| 313 | } |
| 314 | |
| 315 | public void setNames() { |
| 316 | if (TextUtils.isEmpty(mTextLine1.getText())) { |
| 317 | mTextLine1.setText(mUri.getLastPathSegment()); |
| 318 | } |
| 319 | if (TextUtils.isEmpty(mTextLine2.getText())) { |
| 320 | mTextLine2.setVisibility(View.GONE); |
| 321 | } else { |
| 322 | mTextLine2.setVisibility(View.VISIBLE); |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | class ProgressRefresher implements Runnable { |
| 327 | @Override |
| 328 | public void run() { |
| 329 | if (mPlayer != null && !mSeeking && mDuration != 0) { |
| 330 | mSeekBar.setProgress(mPlayer.getCurrentPosition()); |
| 331 | } |
| 332 | mProgressRefresher.removeCallbacksAndMessages(null); |
| 333 | if (!mUiPaused) { |
| 334 | mProgressRefresher.postDelayed(new ProgressRefresher(), 200); |
| 335 | } |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | private void updatePlayPause() { |
| 340 | ImageButton b = (ImageButton) findViewById(R.id.playpause); |
| 341 | if (b != null && mPlayer != null) { |
| 342 | if (mPlayer.isPlaying()) { |
| 343 | b.setImageResource(R.drawable.btn_playback_ic_pause_small); |
| 344 | } else { |
| 345 | b.setImageResource(R.drawable.btn_playback_ic_play_small); |
| 346 | mProgressRefresher.removeCallbacksAndMessages(null); |
| 347 | } |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | private OnSeekBarChangeListener mSeekListener = new OnSeekBarChangeListener() { |
| 352 | public void onStartTrackingTouch(SeekBar bar) { |
| 353 | mSeeking = true; |
| 354 | } |
| 355 | public void onProgressChanged(SeekBar bar, int progress, boolean fromuser) { |
| 356 | if (!fromuser) { |
| 357 | return; |
| 358 | } |
| 359 | // Protection for case of simultaneously tapping on seek bar and exit |
| 360 | if (mPlayer == null) { |
| 361 | return; |
| 362 | } |
| 363 | mPlayer.seekTo(progress); |
| 364 | } |
| 365 | public void onStopTrackingTouch(SeekBar bar) { |
| 366 | mSeeking = false; |
| 367 | } |
| 368 | }; |
| 369 | |
| 370 | public boolean onError(MediaPlayer mp, int what, int extra) { |
| 371 | Toast.makeText(this, R.string.playback_failed, Toast.LENGTH_SHORT).show(); |
| 372 | finish(); |
| 373 | return true; |
| 374 | } |
| 375 | |
| 376 | public void onCompletion(MediaPlayer mp) { |
| 377 | mSeekBar.setProgress(mDuration); |
| 378 | updatePlayPause(); |
| 379 | } |
| 380 | |
| 381 | public void playPauseClicked(View v) { |
| 382 | // Protection for case of simultaneously tapping on play/pause and exit |
| 383 | if (mPlayer == null) { |
| 384 | return; |
| 385 | } |
| 386 | if (mPlayer.isPlaying()) { |
| 387 | mPlayer.pause(); |
| 388 | } else { |
| 389 | start(); |
| 390 | } |
| 391 | updatePlayPause(); |
| 392 | } |
| 393 | |
| 394 | @Override |
| 395 | public boolean onCreateOptionsMenu(Menu menu) { |
| 396 | super.onCreateOptionsMenu(menu); |
| 397 | // TODO: if mMediaId != -1, then the playing file has an entry in the media |
| 398 | // database, and we could open it in the full music app instead. |
| 399 | // Ideally, we would hand off the currently running mediaplayer |
| 400 | // to the music UI, which can probably be done via a public static |
| 401 | menu.add(0, OPEN_IN_MUSIC, 0, "open in music"); |
| 402 | return true; |
| 403 | } |
| 404 | |
| 405 | @Override |
| 406 | public boolean onPrepareOptionsMenu(Menu menu) { |
| 407 | MenuItem item = menu.findItem(OPEN_IN_MUSIC); |
| 408 | if (mMediaId >= 0) { |
| 409 | item.setVisible(true); |
| 410 | return true; |
| 411 | } |
| 412 | item.setVisible(false); |
| 413 | return false; |
| 414 | } |
| 415 | |
| 416 | @Override |
| 417 | public boolean onKeyDown(int keyCode, KeyEvent event) { |
| 418 | switch (keyCode) { |
| 419 | case KeyEvent.KEYCODE_HEADSETHOOK: |
| 420 | case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE: |
| 421 | if (mPlayer.isPlaying()) { |
| 422 | mPlayer.pause(); |
| 423 | } else { |
| 424 | start(); |
| 425 | } |
| 426 | updatePlayPause(); |
| 427 | return true; |
| 428 | case KeyEvent.KEYCODE_MEDIA_PLAY: |
| 429 | start(); |
| 430 | updatePlayPause(); |
| 431 | return true; |
| 432 | case KeyEvent.KEYCODE_MEDIA_PAUSE: |
| 433 | if (mPlayer.isPlaying()) { |
| 434 | mPlayer.pause(); |
| 435 | } |
| 436 | updatePlayPause(); |
| 437 | return true; |
| 438 | case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD: |
| 439 | case KeyEvent.KEYCODE_MEDIA_NEXT: |
| 440 | case KeyEvent.KEYCODE_MEDIA_PREVIOUS: |
| 441 | case KeyEvent.KEYCODE_MEDIA_REWIND: |
| 442 | return true; |
| 443 | case KeyEvent.KEYCODE_MEDIA_STOP: |
| 444 | case KeyEvent.KEYCODE_BACK: |
| 445 | stopPlayback(); |
| 446 | finish(); |
| 447 | return true; |
| 448 | } |
| 449 | return super.onKeyDown(keyCode, event); |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | * Wrapper class to help with handing off the MediaPlayer to the next instance |
| 454 | * of the activity in case of orientation change, without losing any state. |
| 455 | */ |
| 456 | private static class PreviewPlayer extends MediaPlayer implements OnPreparedListener { |
| 457 | AudioPreview mActivity; |
| 458 | boolean mIsPrepared = false; |
| 459 | |
| 460 | public void setActivity(AudioPreview activity) { |
| 461 | mActivity = activity; |
| 462 | setOnPreparedListener(this); |
| 463 | setOnErrorListener(mActivity); |
| 464 | setOnCompletionListener(mActivity); |
| 465 | } |
| 466 | |
| 467 | public void setDataSourceAndPrepare(Uri uri) throws IllegalArgumentException, |
| 468 | SecurityException, |
| 469 | IllegalStateException, IOException { |
| 470 | setDataSource(mActivity, uri); |
| 471 | prepareAsync(); |
| 472 | } |
| 473 | |
| 474 | /* (non-Javadoc) |
| 475 | * @see android.media.MediaPlayer.OnPreparedListener#onPrepared(android.media.MediaPlayer) |
| 476 | */ |
| 477 | @Override |
| 478 | public void onPrepared(MediaPlayer mp) { |
| 479 | mIsPrepared = true; |
| 480 | mActivity.onPrepared(mp); |
| 481 | } |
| 482 | |
| 483 | boolean isPrepared() { |
| 484 | return mIsPrepared; |
| 485 | } |
| 486 | } |
| 487 | } |