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