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