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