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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013 ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17 package com.owncloud.android.ui.preview;
  18
  19 import java.util.ArrayList;
  20 import java.util.List;
  21
  22 import android.accounts.Account;
  23 import android.app.Activity;
  24 import android.app.AlertDialog;
  25 import android.content.ComponentName;
  26 import android.content.Context;
  27 import android.content.DialogInterface;
  28 import android.content.Intent;
  29 import android.content.ServiceConnection;
  30 import android.content.res.Configuration;
  31 import android.media.MediaPlayer;
  32 import android.media.MediaPlayer.OnCompletionListener;
  33 import android.media.MediaPlayer.OnErrorListener;
  34 import android.media.MediaPlayer.OnPreparedListener;
  35 import android.os.Build;
  36 import android.os.Bundle;
  37 import android.os.IBinder;
  38 import android.view.LayoutInflater;
  39 import android.view.MotionEvent;
  40 import android.view.View;
  41 import android.view.View.OnTouchListener;
  42 import android.view.ViewGroup;
  43 import android.widget.ImageView;
  44 import android.widget.Toast;
  45 import android.widget.VideoView;
  46
  47 import com.actionbarsherlock.view.Menu;
  48 import com.actionbarsherlock.view.MenuInflater;
  49 import com.actionbarsherlock.view.MenuItem;
  50 import com.owncloud.android.R;
  51 import com.owncloud.android.datamodel.FileDataStorageManager;
  52 import com.owncloud.android.datamodel.OCFile;
  53 import com.owncloud.android.media.MediaControlView;
  54 import com.owncloud.android.media.MediaService;
  55 import com.owncloud.android.media.MediaServiceBinder;
  56 import com.owncloud.android.ui.activity.FileActivity;
  57 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
  58 import com.owncloud.android.ui.fragment.FileFragment;
  59 import com.owncloud.android.utils.Log_OC;
  60
  61
  62 /**
  63  * This fragment shows a preview of a downloaded media file (audio or video).
  64  *
  65  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  66  *
  67  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  68  *
  69  * @author David A. Velasco
  70  */
  71 public class PreviewMediaFragment extends FileFragment implements
  72         OnTouchListener,
  73         ConfirmationDialogFragment.ConfirmationDialogFragmentListener  {
  74
  75     public static final String EXTRA_FILE = "FILE";
  76     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  77     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  78     private static final String EXTRA_PLAYING = "PLAYING";
  79
  80     private View mView;
  81     private Account mAccount;
  82     private ImageView mImagePreview;
  83     private VideoView mVideoPreview;
  84     private int mSavedPlaybackPosition;
  85
  86     private MediaServiceBinder mMediaServiceBinder = null;
  87     private MediaControlView mMediaController = null;
  88     private MediaServiceConnection mMediaServiceConnection = null;
  89     private VideoHelper mVideoHelper;
  90     private boolean mAutoplay;
  91     public boolean mPrepared;
  92
  93     private FileFragment.ContainerActivity mContainerActivity;
  94
  95     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
  96
  97
  98     /**
  99      * Creates a fragment to preview a file.
 100      *
 101      * When 'fileToDetail' or 'ocAccount' are null
 102      *
 103      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 104      * @param ocAccount         An ownCloud account; needed to start downloads
 105      */
 106     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount, int startPlaybackPosition, boolean autoplay) {
 107         super(fileToDetail);
 108         mAccount = ocAccount;
 109         mSavedPlaybackPosition = startPlaybackPosition;
 110         mAutoplay = autoplay;
 111     }
 112
 113
 114     /**
 115      *  Creates an empty fragment for previews.
 116      *
 117      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 118      *
 119      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 120      */
 121     public PreviewMediaFragment() {
 122         super();
 123         mAccount = null;
 124         mSavedPlaybackPosition = 0;
 125         mAutoplay = true;
 126     }
 127
 128
 129     /**
 130      * {@inheritDoc}
 131      */
 132     @Override
 133     public void onCreate(Bundle savedInstanceState) {
 134         super.onCreate(savedInstanceState);
 135         setHasOptionsMenu(true);
 136     }
 137
 138
 139     /**
 140      * {@inheritDoc}
 141      */
 142     @Override
 143     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 144             Bundle savedInstanceState) {
 145         super.onCreateView(inflater, container, savedInstanceState);
 146         Log_OC.e(TAG, "onCreateView");
 147
 148
 149         mView = inflater.inflate(R.layout.file_preview, container, false);
 150
 151         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 152         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 153         mVideoPreview.setOnTouchListener(this);
 154
 155         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 156
 157         return mView;
 158     }
 159
 160
 161     /**
 162      * {@inheritDoc}
 163      */
 164     @Override
 165     public void onActivityCreated(Bundle savedInstanceState) {
 166         super.onActivityCreated(savedInstanceState);
 167         Log_OC.e(TAG, "onActivityCreated");
 168
 169         if (savedInstanceState != null) {
 170             setFile((OCFile)savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_FILE));
 171             mAccount = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_ACCOUNT);
 172             mSavedPlaybackPosition = savedInstanceState.getInt(PreviewMediaFragment.EXTRA_PLAY_POSITION);
 173             mAutoplay = savedInstanceState.getBoolean(PreviewMediaFragment.EXTRA_PLAYING);
 174
 175         }
 176         OCFile file = getFile();
 177         if (file == null) {
 178             throw new IllegalStateException("Instanced with a NULL OCFile");
 179         }
 180         if (mAccount == null) {
 181             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 182         }
 183         if (!file.isDown()) {
 184             throw new IllegalStateException("There is no local file to preview");
 185         }
 186         if (file.isVideo()) {
 187             mVideoPreview.setVisibility(View.VISIBLE);
 188             mImagePreview.setVisibility(View.GONE);
 189             prepareVideo();
 190
 191         } else {
 192             mVideoPreview.setVisibility(View.GONE);
 193             mImagePreview.setVisibility(View.VISIBLE);
 194         }
 195
 196     }
 197
 198
 199     /**
 200      * {@inheritDoc}
 201      */
 202     @Override
 203     public void onSaveInstanceState(Bundle outState) {
 204         super.onSaveInstanceState(outState);
 205         Log_OC.e(TAG, "onSaveInstanceState");
 206
 207         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, getFile());
 208         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 209
 210         if (getFile().isVideo()) {
 211             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 212             mAutoplay = mVideoPreview.isPlaying();
 213             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mSavedPlaybackPosition);
 214             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mAutoplay);
 215         } else {
 216             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mMediaServiceBinder.getCurrentPosition());
 217             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mMediaServiceBinder.isPlaying());
 218         }
 219     }
 220
 221
 222     @Override
 223     public void onStart() {
 224         super.onStart();
 225         Log_OC.e(TAG, "onStart");
 226
 227         OCFile file = getFile();
 228         if (file != null) {
 229            if (file.isAudio()) {
 230                bindMediaService();
 231
 232            } else if (file.isVideo()) {
 233                stopAudio();
 234                playVideo();
 235            }
 236         }
 237     }
 238
 239
 240     private void stopAudio() {
 241         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 242         i.setAction(MediaService.ACTION_STOP_ALL);
 243         getSherlockActivity().startService(i);
 244     }
 245
 246
 247     /**
 248      * {@inheritDoc}
 249      */
 250     @Override
 251     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 252         super.onCreateOptionsMenu(menu, inflater);
 253
 254         inflater.inflate(R.menu.file_actions_menu, menu);
 255         List<Integer> toHide = new ArrayList<Integer>();
 256
 257         MenuItem item = null;
 258         toHide.add(R.id.action_cancel_download);
 259         toHide.add(R.id.action_cancel_upload);
 260         toHide.add(R.id.action_download_file);
 261         toHide.add(R.id.action_sync_file);
 262         toHide.add(R.id.action_rename_file);    // by now
 263
 264         // Options shareLink
 265         if (!getFile().isShareByLink()) {
 266             toHide.add(R.id.action_unshare_file);
 267         }
 268
 269         // Send file
 270         boolean sendEnabled = getString(R.string.send_files_to_other_apps).equalsIgnoreCase("on");
 271         if (!sendEnabled) {
 272             toHide.add(R.id.action_send_file);
 273         }
 274
 275         for (int i : toHide) {
 276             item = menu.findItem(i);
 277             if (item != null) {
 278                 item.setVisible(false);
 279                 item.setEnabled(false);
 280             }
 281         }
 282
 283     }
 284
 285
 286     /**
 287      * {@inheritDoc}
 288      */
 289     @Override
 290     public void onPrepareOptionsMenu(Menu menu) {
 291         super.onPrepareOptionsMenu(menu);
 292
 293         MenuItem item = menu.findItem(R.id.action_unshare_file);
 294         // Options shareLink
 295         if (!getFile().isShareByLink()) {
 296             item.setVisible(false);
 297             item.setEnabled(false);
 298         } else {
 299             item.setVisible(true);
 300             item.setEnabled(true);
 301         }
 302     }
 303
 304
 305     /**
 306      * {@inheritDoc}
 307      */
 308     @Override
 309     public boolean onOptionsItemSelected(MenuItem item) {
 310         switch (item.getItemId()) {
 311             case R.id.action_share_file: {
 312                 shareFileWithLink();
 313                 return true;
 314             }
 315             case R.id.action_unshare_file: {
 316                 unshareFileWithLink();
 317                 return true;
 318             }
 319             case R.id.action_open_file_with: {
 320                 openFile();
 321                 return true;
 322             }
 323             case R.id.action_remove_file: {
 324                 removeFile();
 325                 return true;
 326             }
 327             case R.id.action_see_details: {
 328                 seeDetails();
 329                 return true;
 330             }
 331             case R.id.action_send_file: {
 332                 sendFile();
 333             }
 334
 335             default:
 336                 return false;
 337         }
 338     }
 339
 340
 341
 342     /**
 343      * Update the file of the fragment with file value
 344      * @param file
 345      */
 346     public void updateFile(OCFile file){
 347         setFile(file);
 348     }
 349
 350     private void unshareFileWithLink() {
 351         stopPreview(false);
 352         mContainerActivity.getFileOperationsHelper().unshareFileWithLink(getFile());
 353     }
 354
 355     private void shareFileWithLink() {
 356         stopPreview(false);
 357         mContainerActivity.getFileOperationsHelper().shareFileWithLink(getFile());
 358
 359     }
 360
 361     private void sendFile() {
 362         stopPreview(false);
 363         mContainerActivity.getFileOperationsHelper().sendDownloadedFile(getFile());
 364
 365     }
 366
 367     private void seeDetails() {
 368         stopPreview(false);
 369         mContainerActivity.showDetails(getFile());
 370     }
 371
 372
 373     private void prepareVideo() {
 374         // create helper to get more control on the playback
 375         mVideoHelper = new VideoHelper();
 376         mVideoPreview.setOnPreparedListener(mVideoHelper);
 377         mVideoPreview.setOnCompletionListener(mVideoHelper);
 378         mVideoPreview.setOnErrorListener(mVideoHelper);
 379     }
 380
 381     private void playVideo() {
 382         // create and prepare control panel for the user
 383         mMediaController.setMediaPlayer(mVideoPreview);
 384
 385         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 386         mVideoPreview.setVideoPath(getFile().getStoragePath());
 387     }
 388
 389
 390     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 391
 392         /**
 393          * Called when the file is ready to be played.
 394          *
 395          * Just starts the playback.
 396          *
 397          * @param   mp    {@link MediaPlayer} instance performing the playback.
 398          */
 399         @Override
 400         public void onPrepared(MediaPlayer vp) {
 401             Log_OC.e(TAG, "onPrepared");
 402             mVideoPreview.seekTo(mSavedPlaybackPosition);
 403             if (mAutoplay) {
 404                 mVideoPreview.start();
 405             }
 406             mMediaController.setEnabled(true);
 407             mMediaController.updatePausePlay();
 408             mPrepared = true;
 409         }
 410
 411
 412         /**
 413          * Called when the file is finished playing.
 414          *
 415          * Finishes the activity.
 416          *
 417          * @param   mp    {@link MediaPlayer} instance performing the playback.
 418          */
 419         @Override
 420         public void onCompletion(MediaPlayer  mp) {
 421             Log_OC.e(TAG, "completed");
 422             if (mp != null) {
 423                 mVideoPreview.seekTo(0);
 424                 // next lines are necessary to work around undesired video loops
 425                 if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD) {
 426                     mVideoPreview.pause();
 427
 428                 } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD_MR1) {
 429                     // mVideePreview.pause() is not enough
 430
 431                     mMediaController.setEnabled(false);
 432                     mVideoPreview.stopPlayback();
 433                     mAutoplay = false;
 434                     mSavedPlaybackPosition = 0;
 435                     mVideoPreview.setVideoPath(getFile().getStoragePath());
 436                 }
 437             } // else : called from onError()
 438             mMediaController.updatePausePlay();
 439         }
 440
 441
 442         /**
 443          * Called when an error in playback occurs.
 444          *
 445          * @param   mp      {@link MediaPlayer} instance performing the playback.
 446          * @param   what    Type of error
 447          * @param   extra   Extra code specific to the error
 448          */
 449         @Override
 450         public boolean onError(MediaPlayer mp, int what, int extra) {
 451             if (mVideoPreview.getWindowToken() != null) {
 452                 String message = MediaService.getMessageForMediaError(getSherlockActivity(), what, extra);
 453                 new AlertDialog.Builder(getSherlockActivity())
 454                         .setMessage(message)
 455                         .setPositiveButton(android.R.string.VideoView_error_button,
 456                                 new DialogInterface.OnClickListener() {
 457                                     public void onClick(DialogInterface dialog, int whichButton) {
 458                                         dialog.dismiss();
 459                                         VideoHelper.this.onCompletion(null);
 460                                     }
 461                                 })
 462                         .setCancelable(false)
 463                         .show();
 464             }
 465             return true;
 466         }
 467
 468     }
 469
 470
 471     @Override
 472     public void onPause() {
 473         super.onPause();
 474         Log_OC.e(TAG, "onPause");
 475     }
 476
 477     @Override
 478     public void onResume() {
 479         super.onResume();
 480         Log_OC.e(TAG, "onResume");
 481     }
 482
 483     @Override
 484     public void onDestroy() {
 485         super.onDestroy();
 486         Log_OC.e(TAG, "onDestroy");
 487     }
 488
 489     @Override
 490     public void onStop() {
 491         Log_OC.e(TAG, "onStop");
 492         super.onStop();
 493
 494         mPrepared = false;
 495         if (mMediaServiceConnection != null) {
 496             Log_OC.d(TAG, "Unbinding from MediaService ...");
 497             if (mMediaServiceBinder != null && mMediaController != null) {
 498                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 499             }
 500             getSherlockActivity().unbindService(mMediaServiceConnection);
 501             mMediaServiceConnection = null;
 502             mMediaServiceBinder = null;
 503         }
 504     }
 505
 506     @Override
 507     public boolean onTouch(View v, MotionEvent event) {
 508         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 509             startFullScreenVideo();
 510             return true;
 511         }
 512         return false;
 513     }
 514
 515
 516     private void startFullScreenVideo() {
 517         Intent i = new Intent(getSherlockActivity(), PreviewVideoActivity.class);
 518         i.putExtra(FileActivity.EXTRA_ACCOUNT, mAccount);
 519         i.putExtra(FileActivity.EXTRA_FILE, getFile());
 520         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 521         mVideoPreview.pause();
 522         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 523         startActivityForResult(i, 0);
 524     }
 525
 526     @Override
 527     public void onConfigurationChanged (Configuration newConfig) {
 528         Log_OC.e(TAG, "onConfigurationChanged " + this);
 529     }
 530
 531     @Override
 532     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 533         Log_OC.e(TAG, "onActivityResult " + this);
 534         super.onActivityResult(requestCode, resultCode, data);
 535         if (resultCode == Activity.RESULT_OK) {
 536             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 537             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 538         }
 539     }
 540
 541
 542     private void playAudio() {
 543         OCFile file = getFile();
 544         if (!mMediaServiceBinder.isPlaying(file)) {
 545             Log_OC.d(TAG, "starting playback of " + file.getStoragePath());
 546             mMediaServiceBinder.start(mAccount, file, mAutoplay, mSavedPlaybackPosition);
 547
 548         } else {
 549             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 550                 mMediaServiceBinder.start();
 551                 mMediaController.updatePausePlay();
 552             }
 553         }
 554     }
 555
 556
 557     private void bindMediaService() {
 558         Log_OC.d(TAG, "Binding to MediaService...");
 559         if (mMediaServiceConnection == null) {
 560             mMediaServiceConnection = new MediaServiceConnection();
 561         }
 562         getSherlockActivity().bindService(  new Intent(getSherlockActivity(),
 563                                     MediaService.class),
 564                                     mMediaServiceConnection,
 565                                     Context.BIND_AUTO_CREATE);
 566             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 567     }
 568
 569     /** Defines callbacks for service binding, passed to bindService() */
 570     private class MediaServiceConnection implements ServiceConnection {
 571
 572         @Override
 573         public void onServiceConnected(ComponentName component, IBinder service) {
 574             if (getSherlockActivity() != null) {
 575                 if (component.equals(new ComponentName(getSherlockActivity(), MediaService.class))) {
 576                     Log_OC.d(TAG, "Media service connected");
 577                     mMediaServiceBinder = (MediaServiceBinder) service;
 578                     if (mMediaServiceBinder != null) {
 579                         prepareMediaController();
 580                         playAudio();    // do not wait for the touch of nobody to play audio
 581
 582                         Log_OC.d(TAG, "Successfully bound to MediaService, MediaController ready");
 583
 584                     } else {
 585                         Log_OC.e(TAG, "Unexpected response from MediaService while binding");
 586                     }
 587                 }
 588             }
 589         }
 590
 591         private void prepareMediaController() {
 592             mMediaServiceBinder.registerMediaController(mMediaController);
 593             if (mMediaController != null) {
 594                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 595                 mMediaController.setEnabled(true);
 596                 mMediaController.updatePausePlay();
 597             }
 598         }
 599
 600         @Override
 601         public void onServiceDisconnected(ComponentName component) {
 602             if (component.equals(new ComponentName(getSherlockActivity(), MediaService.class))) {
 603                 Log_OC.e(TAG, "Media service suddenly disconnected");
 604                 if (mMediaController != null) {
 605                     mMediaController.setMediaPlayer(null);
 606                 } else {
 607                     Toast.makeText(getSherlockActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 608                 }
 609                 mMediaServiceBinder = null;
 610                 mMediaServiceConnection = null;
 611             }
 612         }
 613     }
 614
 615
 616
 617     /**
 618      * Opens the previewed file with an external application.
 619      */
 620     private void openFile() {
 621         stopPreview(true);
 622         mContainerActivity.getFileOperationsHelper().openFile(getFile());
 623         finish();
 624     }
 625
 626     /**
 627      * Starts a the removal of the previewed file.
 628      *
 629      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 630      * depending upon the user selection in the dialog.
 631      */
 632     private void removeFile() {
 633         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 634                 R.string.confirmation_remove_alert,
 635                 new String[]{getFile().getFileName()},
 636                 R.string.confirmation_remove_remote_and_local,
 637                 R.string.confirmation_remove_local,
 638                 R.string.common_cancel);
 639         confDialog.setOnConfirmationListener(this);
 640         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 641     }
 642
 643
 644     /**
 645      * Performs the removal of the previewed file, both locally and in the server.
 646      */
 647     @Override
 648     public void onConfirmation(String callerTag) {
 649         OCFile file = getFile();
 650         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 651         if (storageManager.getFileById(file.getFileId()) != null) {   // check that the file is still there;
 652             stopPreview(true);
 653             mContainerActivity.getFileOperationsHelper().removeFile(file, true);
 654         }
 655     }
 656
 657
 658     /**
 659      * Removes the file from local storage
 660      */
 661     @Override
 662     public void onNeutral(String callerTag) {
 663         OCFile file = getFile();
 664         stopPreview(true);
 665         mContainerActivity.getStorageManager().removeFile(file, false, true);    // TODO perform in background task / new thread
 666         finish();
 667     }
 668
 669     /**
 670      * User cancelled the removal action.
 671      */
 672     @Override
 673     public void onCancel(String callerTag) {
 674         // nothing to do here
 675     }
 676
 677
 678     /**
 679      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 680      *
 681      * @param file      File to test if can be previewed.
 682      * @return          'True' if the file can be handled by the fragment.
 683      */
 684     public static boolean canBePreviewed(OCFile file) {
 685         return (file != null && (file.isAudio() || file.isVideo()));
 686     }
 687
 688
 689     private void stopPreview(boolean stopAudio) {
 690         OCFile file = getFile();
 691         if (file.isAudio() && stopAudio) {
 692             mMediaServiceBinder.pause();
 693
 694         } else if (file.isVideo()) {
 695             mVideoPreview.stopPlayback();
 696         }
 697     }
 698
 699
 700
 701     /**
 702      * Finishes the preview
 703      */
 704     private void finish() {
 705         getSherlockActivity().onBackPressed();
 706     }
 707
 708
 709     public int getPosition() {
 710         if (mPrepared) {
 711             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 712         }
 713         Log_OC.e(TAG, "getting position: " + mSavedPlaybackPosition);
 714         return mSavedPlaybackPosition;
 715     }
 716
 717     public boolean isPlaying() {
 718         if (mPrepared) {
 719             mAutoplay = mVideoPreview.isPlaying();
 720         }
 721         return mAutoplay;
 722     }
 723
 724 }