src/com/owncloud/android/ui/preview/PreviewMediaFragment.java

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015 ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import android.accounts.Account;
  23 import android.accounts.AuthenticatorException;
  24 import android.accounts.OperationCanceledException;
  25 import android.app.Activity;
  26 import android.content.ActivityNotFoundException;
  27 import android.graphics.Bitmap;
  28 import android.graphics.BitmapFactory;
  29 import android.media.MediaMetadataRetriever;
  30 import android.os.AsyncTask;
  31 import android.support.v7.app.AlertDialog;
  32 import android.content.ComponentName;
  33 import android.content.Context;
  34 import android.content.DialogInterface;
  35 import android.content.Intent;
  36 import android.content.ServiceConnection;
  37 import android.content.res.Configuration;
  38 import android.content.res.Resources;
  39 import android.media.MediaPlayer;
  40 import android.media.MediaPlayer.OnCompletionListener;
  41 import android.media.MediaPlayer.OnErrorListener;
  42 import android.media.MediaPlayer.OnPreparedListener;
  43 import android.net.Uri;
  44 import android.os.Build;
  45 import android.os.Bundle;
  46 import android.os.IBinder;
  47 import android.view.LayoutInflater;
  48 import android.view.Menu;
  49 import android.view.MenuInflater;
  50 import android.view.MenuItem;
  51 import android.view.MotionEvent;
  52 import android.view.View;
  53 import android.view.View.OnTouchListener;
  54 import android.view.ViewGroup;
  55 import android.widget.ImageView;
  56 import android.widget.Toast;
  57 import android.widget.VideoView;
  58
  59 import com.owncloud.android.MainApp;
  60 import com.owncloud.android.R;
  61 import com.owncloud.android.datamodel.OCFile;
  62 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
  63 import com.owncloud.android.files.FileMenuFilter;
  64 import com.owncloud.android.lib.common.OwnCloudAccount;
  65 import com.owncloud.android.lib.common.OwnCloudClient;
  66 import com.owncloud.android.lib.common.OwnCloudClientManagerFactory;
  67 import com.owncloud.android.lib.common.OwnCloudCredentials;
  68 import com.owncloud.android.lib.common.accounts.AccountUtils;
  69 import com.owncloud.android.lib.common.utils.Log_OC;
  70 import com.owncloud.android.media.MediaControlView;
  71 import com.owncloud.android.media.MediaService;
  72 import com.owncloud.android.media.MediaServiceBinder;
  73 import com.owncloud.android.ui.activity.FileActivity;
  74 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
  75 import com.owncloud.android.ui.dialog.RemoveFileDialogFragment;
  76 import com.owncloud.android.ui.fragment.FileFragment;
  77
  78 import java.io.IOException;
  79 import java.util.concurrent.ExecutionException;
  80
  81
  82 /**
  83  * This fragment shows a preview of a downloaded media file (audio or video).
  84  *
  85  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will
  86  * produce an {@link IllegalStateException}.
  87  *
  88  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is
  89  * generated on instantiation too.
  90  */
  91 public class PreviewMediaFragment extends FileFragment implements
  92         OnTouchListener {
  93
  94     public static final String EXTRA_FILE = "FILE";
  95     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  96     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  97     private static final String EXTRA_PLAYING = "PLAYING";
  98
  99     private View mView;
 100     private Account mAccount;
 101     private ImageView mImagePreview;
 102     private VideoView mVideoPreview;
 103     private int mSavedPlaybackPosition;
 104     private String mUri;
 105
 106     private MediaServiceBinder mMediaServiceBinder = null;
 107     private MediaControlView mMediaController = null;
 108     private MediaServiceConnection mMediaServiceConnection = null;
 109     private VideoHelper mVideoHelper;
 110     private boolean mAutoplay;
 111     public boolean mPrepared;
 112
 113     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 114
 115
 116     /**
 117      * Creates a fragment to preview a file.
 118      * <p/>
 119      * When 'fileToDetail' or 'ocAccount' are null
 120      *
 121      * @param fileToDetail An {@link OCFile} to preview in the fragment
 122      * @param ocAccount    An ownCloud account; needed to start downloads
 123      */
 124     public PreviewMediaFragment(
 125             OCFile fileToDetail,
 126             Account ocAccount,
 127             int startPlaybackPosition,
 128             boolean autoplay) {
 129
 130         super(fileToDetail);
 131         mAccount = ocAccount;
 132         mSavedPlaybackPosition = startPlaybackPosition;
 133         mAutoplay = autoplay;
 134     }
 135
 136
 137     /**
 138      * Creates an empty fragment for previews.
 139      * <p/>
 140      * MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically
 141      * (for instance, when the device is turned a aside).
 142      * <p/>
 143      * DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful
 144      * construction
 145      */
 146     public PreviewMediaFragment() {
 147         super();
 148         mAccount = null;
 149         mSavedPlaybackPosition = 0;
 150         mAutoplay = true;
 151     }
 152
 153
 154     /**
 155      * {@inheritDoc}
 156      */
 157     @Override
 158     public void onCreate(Bundle savedInstanceState) {
 159         super.onCreate(savedInstanceState);
 160         setHasOptionsMenu(true);
 161     }
 162
 163
 164     /**
 165      * {@inheritDoc}
 166      */
 167     @Override
 168     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 169                              Bundle savedInstanceState) {
 170         super.onCreateView(inflater, container, savedInstanceState);
 171         Log_OC.e(TAG, "onCreateView");
 172
 173
 174         mView = inflater.inflate(R.layout.file_preview, container, false);
 175
 176         mImagePreview = (ImageView) mView.findViewById(R.id.image_preview);
 177         mVideoPreview = (VideoView) mView.findViewById(R.id.video_preview);
 178         mVideoPreview.setOnTouchListener(this);
 179
 180         mMediaController = (MediaControlView) mView.findViewById(R.id.media_controller);
 181
 182         return mView;
 183     }
 184
 185
 186     /**
 187      * {@inheritDoc}
 188      */
 189     @Override
 190     public void onActivityCreated(Bundle savedInstanceState) {
 191         super.onActivityCreated(savedInstanceState);
 192         Log_OC.e(TAG, "onActivityCreated");
 193
 194         OCFile file = getFile();
 195         if (savedInstanceState == null) {
 196             if (file == null) {
 197                 throw new IllegalStateException("Instanced with a NULL OCFile");
 198             }
 199             if (mAccount == null) {
 200                 throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 201             }
 202         }
 203         else {
 204             file = (OCFile) savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_FILE);
 205             setFile(file);
 206             mAccount = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_ACCOUNT);
 207             mSavedPlaybackPosition =
 208                     savedInstanceState.getInt(PreviewMediaFragment.EXTRA_PLAY_POSITION);
 209             mAutoplay = savedInstanceState.getBoolean(PreviewMediaFragment.EXTRA_PLAYING);
 210
 211         }
 212         if (file != null) {
 213             if (file.isVideo()) {
 214                 mVideoPreview.setVisibility(View.VISIBLE);
 215                 mImagePreview.setVisibility(View.GONE);
 216                 prepareVideo();
 217
 218             }
 219             else {
 220                 mVideoPreview.setVisibility(View.GONE);
 221                 mImagePreview.setVisibility(View.VISIBLE);
 222                 extractAndSetCoverArt(file);
 223             }
 224         }
 225
 226     }
 227
 228     /**
 229      * tries to read the cover art from the audio file and sets it as cover art.
 230      *
 231      * @param file audio file with potential cover art
 232      */
 233     private void extractAndSetCoverArt(OCFile file) {
 234         if (file.isAudio()) {
 235             try {
 236                 MediaMetadataRetriever mmr = new MediaMetadataRetriever();
 237                 mmr.setDataSource(file.getStoragePath());
 238                 byte[] data = mmr.getEmbeddedPicture();
 239                 if (data != null) {
 240                     Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
 241                     mImagePreview.setImageBitmap(bitmap); //associated cover art in bitmap
 242                 } else {
 243                     mImagePreview.setImageResource(R.drawable.logo);
 244                 }
 245             } catch (Throwable t) {
 246                 mImagePreview.setImageResource(R.drawable.logo);
 247             }
 248         }
 249     }
 250
 251
 252     /**
 253      * {@inheritDoc}
 254      */
 255     @Override
 256     public void onSaveInstanceState(Bundle outState) {
 257         super.onSaveInstanceState(outState);
 258         Log_OC.e(TAG, "onSaveInstanceState");
 259
 260         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, getFile());
 261         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 262
 263         if (getFile().isVideo()) {
 264             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 265             mAutoplay = mVideoPreview.isPlaying();
 266             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION, mSavedPlaybackPosition);
 267             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING, mAutoplay);
 268         }
 269         else {
 270             outState.putInt(
 271                     PreviewMediaFragment.EXTRA_PLAY_POSITION,
 272                     mMediaServiceBinder.getCurrentPosition());
 273             outState.putBoolean(
 274                     PreviewMediaFragment.EXTRA_PLAYING, mMediaServiceBinder.isPlaying());
 275         }
 276     }
 277
 278
 279     @Override
 280     public void onStart() {
 281         super.onStart();
 282         Log_OC.e(TAG, "onStart");
 283
 284         OCFile file = getFile();
 285         if (file != null) {
 286             if (file.isAudio()) {
 287                 bindMediaService();
 288
 289             }
 290             else {
 291                 if (file.isVideo()) {
 292                     stopAudio();
 293                     playVideo();
 294                 }
 295             }
 296         }
 297     }
 298
 299
 300     private void stopAudio() {
 301         Intent i = new Intent(getActivity(), MediaService.class);
 302         i.setAction(MediaService.ACTION_STOP_ALL);
 303         getActivity().startService(i);
 304     }
 305
 306
 307     /**
 308      * {@inheritDoc}
 309      */
 310     @Override
 311     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 312         super.onCreateOptionsMenu(menu, inflater);
 313         inflater.inflate(R.menu.file_actions_menu, menu);
 314     }
 315
 316
 317     /**
 318      * {@inheritDoc}
 319      */
 320     @Override
 321     public void onPrepareOptionsMenu(Menu menu) {
 322         super.onPrepareOptionsMenu(menu);
 323
 324         if (mContainerActivity.getStorageManager() != null) {
 325             FileMenuFilter mf = new FileMenuFilter(
 326                 getFile(),
 327                 mContainerActivity.getStorageManager().getAccount(),
 328                 mContainerActivity,
 329                 getActivity()
 330             );
 331             mf.filter(menu);
 332         }
 333
 334         // additional restriction for this fragment
 335         // TODO allow renaming in PreviewImageFragment
 336         MenuItem item = menu.findItem(R.id.action_rename_file);
 337         if (item != null) {
 338             item.setVisible(false);
 339             item.setEnabled(false);
 340         }
 341
 342         // additional restriction for this fragment
 343         item = menu.findItem(R.id.action_move);
 344         if (item != null) {
 345             item.setVisible(false);
 346             item.setEnabled(false);
 347         }
 348
 349         // additional restriction for this fragment
 350         item = menu.findItem(R.id.action_copy);
 351         if (item != null) {
 352             item.setVisible(false);
 353             item.setEnabled(false);
 354         }
 355     }
 356
 357
 358     /**
 359      * {@inheritDoc}
 360      */
 361     @Override
 362     public boolean onOptionsItemSelected(MenuItem item) {
 363         switch (item.getItemId()) {
 364             case R.id.action_share_file: {
 365                 stopPreview(false);
 366                 mContainerActivity.getFileOperationsHelper().shareFileWithLink(getFile());
 367                 return true;
 368             }
 369             case R.id.action_unshare_file: {
 370                 stopPreview(false);
 371                 mContainerActivity.getFileOperationsHelper().unshareFileWithLink(getFile());
 372                 return true;
 373             }
 374             case R.id.action_open_file_with: {
 375                 openFile();
 376                 return true;
 377             }
 378             case R.id.action_remove_file: {
 379                 RemoveFileDialogFragment dialog = RemoveFileDialogFragment.newInstance(getFile());
 380                 dialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 381                 return true;
 382             }
 383             case R.id.action_see_details: {
 384                 seeDetails();
 385                 return true;
 386             }
 387             case R.id.action_send_file: {
 388                 sendFile();
 389                 return true;
 390             }
 391             case R.id.action_sync_file: {
 392                 mContainerActivity.getFileOperationsHelper().syncFile(getFile());
 393                 return true;
 394             }
 395             case R.id.action_favorite_file:{
 396                 mContainerActivity.getFileOperationsHelper().toggleFavorite(getFile(), true);
 397                 return true;
 398             }
 399             case R.id.action_unfavorite_file:{
 400                 mContainerActivity.getFileOperationsHelper().toggleFavorite(getFile(), false);
 401                 return true;
 402             }
 403             default:
 404                 return false;
 405         }
 406     }
 407
 408
 409     /**
 410      * Update the file of the fragment with file value
 411      *
 412      * @param file
 413      */
 414     public void updateFile(OCFile file) {
 415         setFile(file);
 416     }
 417
 418     private void sendFile() {
 419         stopPreview(false);
 420         mContainerActivity.getFileOperationsHelper().sendDownloadedFile(getFile());
 421
 422     }
 423
 424     private void seeDetails() {
 425         stopPreview(false);
 426         mContainerActivity.showDetails(getFile());
 427     }
 428
 429
 430     private void prepareVideo() {
 431         // create helper to get more control on the playback
 432         mVideoHelper = new VideoHelper();
 433         mVideoPreview.setOnPreparedListener(mVideoHelper);
 434         mVideoPreview.setOnCompletionListener(mVideoHelper);
 435         mVideoPreview.setOnErrorListener(mVideoHelper);
 436     }
 437
 438     @SuppressWarnings("static-access")
 439     private void playVideo() {
 440         // create and prepare control panel for the user
 441         mMediaController.setMediaPlayer(mVideoPreview);
 442
 443         // load the video file in the video player ;
 444         // when done, VideoHelper#onPrepared() will be called
 445         if (getFile().isDown()) {
 446             mUri = getFile().getStoragePath();
 447         } else {
 448             Context context = MainApp.getAppContext();
 449             Account account = mContainerActivity.getStorageManager().getAccount();
 450
 451             mUri = generateUrlWithCredentials(account, context, getFile());
 452         }
 453
 454         mVideoPreview.setVideoPath(mUri);
 455     }
 456
 457     public static String generateUrlWithCredentials(Account account, Context context, OCFile file){
 458         OwnCloudAccount ocAccount = null;
 459         try {
 460             ocAccount = new OwnCloudAccount(account, context);
 461
 462             final ClientGenerationTask task = new ClientGenerationTask();
 463             task.execute(ocAccount);
 464
 465             OwnCloudClient mClient = task.get();
 466             String url = AccountUtils.constructFullURLForAccount(context, account) + Uri.encode(file.getRemotePath(), "/");
 467             OwnCloudCredentials credentials = mClient.getCredentials();
 468
 469             return url.replace("//", "//" + credentials.getUsername() + ":" + credentials.getAuthToken() + "@");
 470
 471         } catch (AccountUtils.AccountNotFoundException e) {
 472             e.printStackTrace();
 473
 474         } catch (InterruptedException e) {
 475             e.printStackTrace();
 476         } catch (ExecutionException e) {
 477             e.printStackTrace();
 478         }
 479         return "";
 480     }
 481
 482     public static class ClientGenerationTask extends AsyncTask<Object, Void, OwnCloudClient> {
 483         @Override
 484         protected OwnCloudClient doInBackground(Object... params) {
 485             Object account = params[0];
 486             if (account instanceof OwnCloudAccount){
 487                 try {
 488                     OwnCloudAccount ocAccount = (OwnCloudAccount) account;
 489                     return OwnCloudClientManagerFactory.getDefaultSingleton().
 490                             getClientFor(ocAccount, MainApp.getAppContext());
 491                 } catch (AccountUtils.AccountNotFoundException e) {
 492                     e.printStackTrace();
 493                 } catch (OperationCanceledException e) {
 494                     e.printStackTrace();
 495                 } catch (AuthenticatorException e) {
 496                     e.printStackTrace();
 497                 } catch (IOException e) {
 498                     e.printStackTrace();
 499                 }
 500             }
 501
 502             return null;
 503         }
 504     }
 505
 506
 507     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 508
 509         /**
 510          * Called when the file is ready to be played.
 511          * <p/>
 512          * Just starts the playback.
 513          *
 514          * @param   vp    {@link MediaPlayer} instance performing the playback.
 515          */
 516         @Override
 517         public void onPrepared(MediaPlayer vp) {
 518             Log_OC.e(TAG, "onPrepared");
 519             mVideoPreview.seekTo(mSavedPlaybackPosition);
 520             if (mAutoplay) {
 521                 mVideoPreview.start();
 522             }
 523             mMediaController.setEnabled(true);
 524             mMediaController.updatePausePlay();
 525             mPrepared = true;
 526         }
 527
 528
 529         /**
 530          * Called when the file is finished playing.
 531          * <p/>
 532          * Finishes the activity.
 533          *
 534          * @param mp {@link MediaPlayer} instance performing the playback.
 535          */
 536         @Override
 537         public void onCompletion(MediaPlayer mp) {
 538             Log_OC.e(TAG, "completed");
 539             if (mp != null) {
 540                 mVideoPreview.seekTo(0);
 541                 // next lines are necessary to work around undesired video loops
 542                 if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD) {
 543                     mVideoPreview.pause();
 544
 545                 }
 546                 else {
 547                     if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD_MR1) {
 548                         // mVideePreview.pause() is not enough
 549
 550                         mMediaController.setEnabled(false);
 551                         mVideoPreview.stopPlayback();
 552                         mAutoplay = false;
 553                         mSavedPlaybackPosition = 0;
 554                         mVideoPreview.setVideoPath(getFile().getStoragePath());
 555                     }
 556                 }
 557             } // else : called from onError()
 558             mMediaController.updatePausePlay();
 559         }
 560
 561
 562         /**
 563          * Called when an error in playback occurs.
 564          *
 565          * @param mp    {@link MediaPlayer} instance performing the playback.
 566          * @param what  Type of error
 567          * @param extra Extra code specific to the error
 568          */
 569         @Override
 570         public boolean onError(MediaPlayer mp, int what, int extra) {
 571             MediaService.streamWithExternalApp(mUri, getActivity()).show();
 572             return true;
 573         }
 574     }
 575
 576     @Override
 577     public void onPause() {
 578         Log_OC.e(TAG, "onPause");
 579         super.onPause();
 580     }
 581
 582     @Override
 583     public void onResume() {
 584         super.onResume();
 585         Log_OC.e(TAG, "onResume");
 586     }
 587
 588     @Override
 589     public void onDestroy() {
 590         Log_OC.e(TAG, "onDestroy");
 591         super.onDestroy();
 592     }
 593
 594     @Override
 595     public void onStop() {
 596         Log_OC.e(TAG, "onStop");
 597
 598         mPrepared = false;
 599         if (mMediaServiceConnection != null) {
 600             Log_OC.d(TAG, "Unbinding from MediaService ...");
 601             if (mMediaServiceBinder != null && mMediaController != null) {
 602                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 603             }
 604             getActivity().unbindService(mMediaServiceConnection);
 605             mMediaServiceConnection = null;
 606             mMediaServiceBinder = null;
 607         }
 608
 609         super.onStop();
 610     }
 611
 612     @Override
 613     public boolean onTouch(View v, MotionEvent event) {
 614         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 615             // added a margin on the left to avoid interfering with gesture to open navigation drawer
 616             if (event.getX() / Resources.getSystem().getDisplayMetrics().density > 24.0) {
 617                 startFullScreenVideo();
 618             }
 619             return true;
 620         }
 621         return false;
 622     }
 623
 624
 625     private void startFullScreenVideo() {
 626         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 627         i.putExtra(FileActivity.EXTRA_ACCOUNT, mAccount);
 628         i.putExtra(FileActivity.EXTRA_FILE, getFile());
 629         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 630         mVideoPreview.pause();
 631         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 632         startActivityForResult(i, 0);
 633     }
 634
 635     @Override
 636     public void onConfigurationChanged(Configuration newConfig) {
 637         Log_OC.e(TAG, "onConfigurationChanged " + this);
 638     }
 639
 640     @Override
 641     public void onActivityResult(int requestCode, int resultCode, Intent data) {
 642         Log_OC.e(TAG, "onActivityResult " + this);
 643         super.onActivityResult(requestCode, resultCode, data);
 644         if (resultCode == Activity.RESULT_OK) {
 645             mSavedPlaybackPosition = data.getExtras().getInt(
 646                     PreviewVideoActivity.EXTRA_START_POSITION);
 647             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 648         }
 649     }
 650
 651
 652     private void playAudio() {
 653         OCFile file = getFile();
 654         if (!mMediaServiceBinder.isPlaying(file)) {
 655             Log_OC.d(TAG, "starting playback of " + file.getStoragePath());
 656             mMediaServiceBinder.start(mAccount, file, mAutoplay, mSavedPlaybackPosition);
 657
 658         }
 659         else {
 660             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 661                 mMediaServiceBinder.start();
 662                 mMediaController.updatePausePlay();
 663             }
 664         }
 665     }
 666
 667
 668     private void bindMediaService() {
 669         Log_OC.d(TAG, "Binding to MediaService...");
 670         if (mMediaServiceConnection == null) {
 671             mMediaServiceConnection = new MediaServiceConnection();
 672         }
 673         getActivity().bindService(  new Intent(getActivity(),
 674                                     MediaService.class),
 675                                     mMediaServiceConnection,
 676                                     Context.BIND_AUTO_CREATE);
 677             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 678     }
 679
 680     /** Defines callbacks for service binding, passed to bindService() */
 681     private class MediaServiceConnection implements ServiceConnection {
 682
 683         @Override
 684         public void onServiceConnected(ComponentName component, IBinder service) {
 685             if (getActivity() != null) {
 686                 if (component.equals(
 687                         new ComponentName(getActivity(), MediaService.class))) {
 688                     Log_OC.d(TAG, "Media service connected");
 689                     mMediaServiceBinder = (MediaServiceBinder) service;
 690                     if (mMediaServiceBinder != null) {
 691                         prepareMediaController();
 692                         playAudio();    // do not wait for the touch of nobody to play audio
 693
 694                         Log_OC.d(TAG, "Successfully bound to MediaService, MediaController ready");
 695
 696                     }
 697                     else {
 698                         Log_OC.e(TAG, "Unexpected response from MediaService while binding");
 699                     }
 700                 }
 701             }
 702         }
 703
 704         private void prepareMediaController() {
 705             mMediaServiceBinder.registerMediaController(mMediaController);
 706             if (mMediaController != null) {
 707                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 708                 mMediaController.setEnabled(true);
 709                 mMediaController.updatePausePlay();
 710             }
 711         }
 712
 713         @Override
 714         public void onServiceDisconnected(ComponentName component) {
 715             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 716                 Log_OC.e(TAG, "Media service suddenly disconnected");
 717                 if (mMediaController != null) {
 718                     mMediaController.setMediaPlayer(null);
 719                 }
 720                 else {
 721                     Toast.makeText(
 722                             getActivity(),
 723                             "No media controller to release when disconnected from media service",
 724                             Toast.LENGTH_SHORT).show();
 725                 }
 726                 mMediaServiceBinder = null;
 727                 mMediaServiceConnection = null;
 728             }
 729         }
 730     }
 731
 732
 733     /**
 734      * Opens the previewed file with an external application.
 735      */
 736     private void openFile() {
 737         stopPreview(true);
 738         mContainerActivity.getFileOperationsHelper().openFile(getFile());
 739         finish();
 740     }
 741
 742     /**
 743      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment}
 744      * to be previewed.
 745      *
 746      * @param file File to test if can be previewed.
 747      * @return 'True' if the file can be handled by the fragment.
 748      */
 749     public static boolean canBePreviewed(OCFile file) {
 750         return (file != null && (file.isAudio() || file.isVideo()));
 751     }
 752
 753
 754     public void stopPreview(boolean stopAudio) {
 755         OCFile file = getFile();
 756         if (file.isAudio() && stopAudio) {
 757             mMediaServiceBinder.pause();
 758
 759         }
 760         else {
 761             if (file.isVideo()) {
 762                 mVideoPreview.stopPlayback();
 763             }
 764         }
 765     }
 766
 767
 768     /**
 769      * Finishes the preview
 770      */
 771     private void finish() {
 772         getActivity().onBackPressed();
 773     }
 774
 775
 776     public int getPosition() {
 777         if (mPrepared) {
 778             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 779         }
 780         Log_OC.e(TAG, "getting position: " + mSavedPlaybackPosition);
 781         return mSavedPlaybackPosition;
 782     }
 783
 784     public boolean isPlaying() {
 785         if (mPrepared) {
 786             mAutoplay = mVideoPreview.isPlaying();
 787         }
 788         return mAutoplay;
 789     }
 790
 791 }