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.io.File;
  20 import java.util.ArrayList;
  21 import java.util.List;
  22
  23 import android.accounts.Account;
  24 import android.app.Activity;
  25 import android.app.AlertDialog;
  26 import android.content.ActivityNotFoundException;
  27 import android.content.ComponentName;
  28 import android.content.Context;
  29 import android.content.DialogInterface;
  30 import android.content.Intent;
  31 import android.content.ServiceConnection;
  32 import android.media.MediaPlayer;
  33 import android.media.MediaPlayer.OnCompletionListener;
  34 import android.media.MediaPlayer.OnErrorListener;
  35 import android.media.MediaPlayer.OnPreparedListener;
  36 import android.net.Uri;
  37 import android.os.Build;
  38 import android.os.Bundle;
  39 import android.os.Handler;
  40 import android.os.IBinder;
  41 import android.support.v4.app.FragmentTransaction;
  42 import android.util.Log;
  43 import android.view.LayoutInflater;
  44 import android.view.MotionEvent;
  45 import android.view.View;
  46 import android.view.View.OnTouchListener;
  47 import android.view.ViewGroup;
  48 import android.webkit.MimeTypeMap;
  49 import android.widget.ImageView;
  50 import android.widget.Toast;
  51 import android.widget.VideoView;
  52
  53 import com.actionbarsherlock.app.SherlockFragment;
  54 import com.actionbarsherlock.view.Menu;
  55 import com.actionbarsherlock.view.MenuInflater;
  56 import com.actionbarsherlock.view.MenuItem;
  57 import com.owncloud.android.datamodel.FileDataStorageManager;
  58 import com.owncloud.android.datamodel.OCFile;
  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.network.OwnCloudClientUtils;
  63 import com.owncloud.android.operations.OnRemoteOperationListener;
  64 import com.owncloud.android.operations.RemoteOperation;
  65 import com.owncloud.android.operations.RemoteOperationResult;
  66 import com.owncloud.android.operations.RemoveFileOperation;
  67 import com.owncloud.android.ui.activity.FileDetailActivity;
  68 import com.owncloud.android.ui.activity.FileDisplayActivity;
  69 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
  70 import com.owncloud.android.ui.fragment.FileDetailFragment;
  71 import com.owncloud.android.ui.fragment.FileFragment;
  72
  73 import com.owncloud.android.R;
  74 import eu.alefzero.webdav.WebdavClient;
  75 import eu.alefzero.webdav.WebdavUtils;
  76
  77 /**
  78  * This fragment shows a preview of a downloaded media file (audio or video).
  79  *
  80  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  81  *
  82  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  83  *
  84  * @author David A. Velasco
  85  */
  86 public class PreviewMediaFragment extends SherlockFragment implements
  87         OnTouchListener , FileFragment,
  88         ConfirmationDialogFragment.ConfirmationDialogFragmentListener, OnRemoteOperationListener  {
  89
  90     public static final String EXTRA_FILE = "FILE";
  91     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  92     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  93     private static final String EXTRA_PLAYING = "PLAYING";
  94
  95     private View mView;
  96     private OCFile mFile;
  97     private Account mAccount;
  98     private FileDataStorageManager mStorageManager;
  99     private ImageView mImagePreview;
 100     private VideoView mVideoPreview;
 101     private int mSavedPlaybackPosition;
 102
 103     private Handler mHandler;
 104     private RemoteOperation mLastRemoteOperation;
 105
 106     private MediaServiceBinder mMediaServiceBinder = null;
 107     private MediaControlView mMediaController = null;
 108     private MediaServiceConnection mMediaServiceConnection = null;
 109     private VideoHelper mVideoHelper;
 110     private boolean mAutoplay;
 111
 112     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 113
 114
 115     /**
 116      * Creates a fragment to preview a file.
 117      *
 118      * When 'fileToDetail' or 'ocAccount' are null
 119      *
 120      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 121      * @param ocAccount         An ownCloud account; needed to start downloads
 122      */
 123     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount) {
 124         mFile = fileToDetail;
 125         mAccount = ocAccount;
 126         mSavedPlaybackPosition = 0;
 127         mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
 128         mAutoplay = true;
 129     }
 130
 131
 132     /**
 133      *  Creates an empty fragment for previews.
 134      *
 135      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 136      *
 137      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 138      */
 139     public PreviewMediaFragment() {
 140         mFile = null;
 141         mAccount = null;
 142         mSavedPlaybackPosition = 0;
 143         mStorageManager = null;
 144         mAutoplay = true;
 145     }
 146
 147
 148     /**
 149      * {@inheritDoc}
 150      */
 151     @Override
 152     public void onCreate(Bundle savedInstanceState) {
 153         super.onCreate(savedInstanceState);
 154         mHandler = new Handler();
 155         setHasOptionsMenu(true);
 156     }
 157
 158
 159     /**
 160      * {@inheritDoc}
 161      */
 162     @Override
 163     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 164             Bundle savedInstanceState) {
 165         super.onCreateView(inflater, container, savedInstanceState);
 166
 167         mView = inflater.inflate(R.layout.file_preview, container, false);
 168
 169         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 170         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 171         mVideoPreview.setOnTouchListener(this);
 172
 173         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 174
 175         return mView;
 176     }
 177
 178
 179     /**
 180      * {@inheritDoc}
 181      */
 182     @Override
 183     public void onAttach(Activity activity) {
 184         super.onAttach(activity);
 185         if (!(activity instanceof FileFragment.ContainerActivity))
 186             throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
 187     }
 188
 189
 190     /**
 191      * {@inheritDoc}
 192      */
 193     @Override
 194     public void onActivityCreated(Bundle savedInstanceState) {
 195         super.onActivityCreated(savedInstanceState);
 196
 197         mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());
 198         if (savedInstanceState != null) {
 199             mFile = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_FILE);
 200             mAccount = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_ACCOUNT);
 201             mSavedPlaybackPosition = savedInstanceState.getInt(PreviewMediaFragment.EXTRA_PLAY_POSITION);
 202             mAutoplay = savedInstanceState.getBoolean(PreviewMediaFragment.EXTRA_PLAYING);
 203
 204         }
 205         if (mFile == null) {
 206             throw new IllegalStateException("Instanced with a NULL OCFile");
 207         }
 208         if (mAccount == null) {
 209             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 210         }
 211         if (!mFile.isDown()) {
 212             throw new IllegalStateException("There is no local file to preview");
 213         }
 214         if (mFile.isVideo()) {
 215             mVideoPreview.setVisibility(View.VISIBLE);
 216             mImagePreview.setVisibility(View.GONE);
 217             prepareVideo();
 218
 219         } else {
 220             mVideoPreview.setVisibility(View.GONE);
 221             mImagePreview.setVisibility(View.VISIBLE);
 222         }
 223
 224     }
 225
 226
 227     /**
 228      * {@inheritDoc}
 229      */
 230     @Override
 231     public void onSaveInstanceState(Bundle outState) {
 232         super.onSaveInstanceState(outState);
 233         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, mFile);
 234         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 235
 236         if (mFile.isVideo()) {
 237             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 238             mAutoplay = mVideoPreview.isPlaying();
 239             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mSavedPlaybackPosition);
 240             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mAutoplay);
 241         } else {
 242             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mMediaServiceBinder.getCurrentPosition());
 243             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mMediaServiceBinder.isPlaying());
 244         }
 245     }
 246
 247
 248     @Override
 249     public void onStart() {
 250         super.onStart();
 251
 252         if (mFile != null) {
 253            if (mFile.isAudio()) {
 254                bindMediaService();
 255
 256            } else if (mFile.isVideo()) {
 257                stopAudio();
 258                playVideo();
 259            }
 260         }
 261     }
 262
 263
 264     private void stopAudio() {
 265         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 266         i.setAction(MediaService.ACTION_STOP_ALL);
 267         getSherlockActivity().startService(i);
 268     }
 269
 270
 271     /**
 272      * {@inheritDoc}
 273      */
 274     @Override
 275     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 276         super.onCreateOptionsMenu(menu, inflater);
 277
 278         inflater.inflate(R.menu.file_actions_menu, menu);
 279         List<Integer> toHide = new ArrayList<Integer>();
 280
 281         MenuItem item = null;
 282         toHide.add(R.id.action_cancel_download);
 283         toHide.add(R.id.action_cancel_upload);
 284         toHide.add(R.id.action_download_file);
 285         toHide.add(R.id.action_rename_file);    // by now
 286
 287         for (int i : toHide) {
 288             item = menu.findItem(i);
 289             if (item != null) {
 290                 item.setVisible(false);
 291                 item.setEnabled(false);
 292             }
 293         }
 294
 295     }
 296
 297
 298     /**
 299      * {@inheritDoc}
 300      */
 301     @Override
 302     public boolean onOptionsItemSelected(MenuItem item) {
 303         switch (item.getItemId()) {
 304             case R.id.action_open_file_with: {
 305                 openFile();
 306                 return true;
 307             }
 308             case R.id.action_remove_file: {
 309                 removeFile();
 310                 return true;
 311             }
 312             case R.id.action_see_details: {
 313                 seeDetails();
 314                 return true;
 315             }
 316
 317             default:
 318                 return false;
 319         }
 320     }
 321
 322
 323     private void seeDetails() {
 324         stopPreview(false);
 325         ((FileFragment.ContainerActivity)getActivity()).showFragmentWithDetails(mFile);
 326     }
 327
 328
 329     private void prepareVideo() {
 330         // create helper to get more control on the playback
 331         mVideoHelper = new VideoHelper();
 332         mVideoPreview.setOnPreparedListener(mVideoHelper);
 333         mVideoPreview.setOnCompletionListener(mVideoHelper);
 334         mVideoPreview.setOnErrorListener(mVideoHelper);
 335     }
 336
 337     private void playVideo() {
 338         // create and prepare control panel for the user
 339         mMediaController.setMediaPlayer(mVideoPreview);
 340
 341         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 342         mVideoPreview.setVideoPath(mFile.getStoragePath());
 343     }
 344
 345
 346     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 347
 348         /**
 349          * Called when the file is ready to be played.
 350          *
 351          * Just starts the playback.
 352          *
 353          * @param   mp    {@link MediaPlayer} instance performing the playback.
 354          */
 355         @Override
 356         public void onPrepared(MediaPlayer vp) {
 357             Log.e(TAG, "onPrepared");
 358             mVideoPreview.seekTo(mSavedPlaybackPosition);
 359             if (mAutoplay) {
 360                 mVideoPreview.start();
 361             }
 362             mMediaController.setEnabled(true);
 363             mMediaController.updatePausePlay();
 364         }
 365
 366
 367         /**
 368          * Called when the file is finished playing.
 369          *
 370          * Finishes the activity.
 371          *
 372          * @param   mp    {@link MediaPlayer} instance performing the playback.
 373          */
 374         @Override
 375         public void onCompletion(MediaPlayer  mp) {
 376             Log.e(TAG, "completed");
 377             if (mp != null) {
 378                 mVideoPreview.seekTo(0);
 379                 // next lines are necessary to work around undesired video loops
 380                 if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD) {
 381                     mVideoPreview.pause();
 382
 383                 } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD_MR1) {
 384                     // mVideePreview.pause() is not enough
 385
 386                     mMediaController.setEnabled(false);
 387                     mVideoPreview.stopPlayback();
 388                     mAutoplay = false;
 389                     mSavedPlaybackPosition = 0;
 390                     mVideoPreview.setVideoPath(mFile.getStoragePath());
 391                 }
 392             } // else : called from onError()
 393             mMediaController.updatePausePlay();
 394         }
 395
 396
 397         /**
 398          * Called when an error in playback occurs.
 399          *
 400          * @param   mp      {@link MediaPlayer} instance performing the playback.
 401          * @param   what    Type of error
 402          * @param   extra   Extra code specific to the error
 403          */
 404         @Override
 405         public boolean onError(MediaPlayer mp, int what, int extra) {
 406             if (mVideoPreview.getWindowToken() != null) {
 407                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 408                 new AlertDialog.Builder(getActivity())
 409                         .setMessage(message)
 410                         .setPositiveButton(android.R.string.VideoView_error_button,
 411                                 new DialogInterface.OnClickListener() {
 412                                     public void onClick(DialogInterface dialog, int whichButton) {
 413                                         dialog.dismiss();
 414                                         VideoHelper.this.onCompletion(null);
 415                                     }
 416                                 })
 417                         .setCancelable(false)
 418                         .show();
 419             }
 420             return true;
 421         }
 422
 423     }
 424
 425
 426     @Override
 427     public void onStop() {
 428         super.onStop();
 429
 430         if (mMediaServiceConnection != null) {
 431             Log.d(TAG, "Unbinding from MediaService ...");
 432             if (mMediaServiceBinder != null && mMediaController != null) {
 433                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 434             }
 435             getActivity().unbindService(mMediaServiceConnection);
 436             mMediaServiceConnection = null;
 437             mMediaServiceBinder = null;
 438         }
 439     }
 440
 441     @Override
 442     public boolean onTouch(View v, MotionEvent event) {
 443         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 444             startFullScreenVideo();
 445             return true;
 446         }
 447         return false;
 448     }
 449
 450
 451     private void startFullScreenVideo() {
 452         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 453         i.putExtra(PreviewVideoActivity.EXTRA_ACCOUNT, mAccount);
 454         i.putExtra(PreviewVideoActivity.EXTRA_FILE, mFile);
 455         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 456         mVideoPreview.pause();
 457         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 458         startActivityForResult(i, 0);
 459     }
 460
 461
 462     @Override
 463     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 464         super.onActivityResult(requestCode, resultCode, data);
 465         if (resultCode == Activity.RESULT_OK) {
 466             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 467             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 468         }
 469     }
 470
 471
 472     private void playAudio() {
 473         if (!mMediaServiceBinder.isPlaying(mFile)) {
 474             Log.d(TAG, "starting playback of " + mFile.getStoragePath());
 475             mMediaServiceBinder.start(mAccount, mFile, mAutoplay, mSavedPlaybackPosition);
 476
 477         } else {
 478             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 479                 mMediaServiceBinder.start();
 480                 mMediaController.updatePausePlay();
 481             }
 482         }
 483     }
 484
 485
 486     private void bindMediaService() {
 487         Log.d(TAG, "Binding to MediaService...");
 488         if (mMediaServiceConnection == null) {
 489             mMediaServiceConnection = new MediaServiceConnection();
 490         }
 491         getActivity().bindService(  new Intent(getActivity(),
 492                                     MediaService.class),
 493                                     mMediaServiceConnection,
 494                                     Context.BIND_AUTO_CREATE);
 495             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 496     }
 497
 498     /** Defines callbacks for service binding, passed to bindService() */
 499     private class MediaServiceConnection implements ServiceConnection {
 500
 501         @Override
 502         public void onServiceConnected(ComponentName component, IBinder service) {
 503             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 504                 Log.d(TAG, "Media service connected");
 505                 mMediaServiceBinder = (MediaServiceBinder) service;
 506                 if (mMediaServiceBinder != null) {
 507                     prepareMediaController();
 508                     playAudio();    // do not wait for the touch of nobody to play audio
 509
 510                     Log.d(TAG, "Successfully bound to MediaService, MediaController ready");
 511
 512                 } else {
 513                     Log.e(TAG, "Unexpected response from MediaService while binding");
 514                 }
 515             }
 516         }
 517
 518         private void prepareMediaController() {
 519             mMediaServiceBinder.registerMediaController(mMediaController);
 520             if (mMediaController != null) {
 521                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 522                 mMediaController.setEnabled(true);
 523                 mMediaController.updatePausePlay();
 524             }
 525         }
 526
 527         @Override
 528         public void onServiceDisconnected(ComponentName component) {
 529             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 530                 Log.e(TAG, "Media service suddenly disconnected");
 531                 if (mMediaController != null) {
 532                     mMediaController.setMediaPlayer(null);
 533                 } else {
 534                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 535                 }
 536                 mMediaServiceBinder = null;
 537                 mMediaServiceConnection = null;
 538             }
 539         }
 540     }
 541
 542
 543
 544     /**
 545      * Opens the previewed file with an external application.
 546      *
 547      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 548      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 549      * available apps for the MIME type known from the file extension, to let the user choose
 550      */
 551     private void openFile() {
 552         stopPreview(true);
 553         String storagePath = mFile.getStoragePath();
 554         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 555         try {
 556             Intent i = new Intent(Intent.ACTION_VIEW);
 557             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mFile.getMimetype());
 558             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 559             startActivity(i);
 560
 561         } catch (Throwable t) {
 562             Log.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + mFile.getMimetype());
 563             boolean toastIt = true;
 564             String mimeType = "";
 565             try {
 566                 Intent i = new Intent(Intent.ACTION_VIEW);
 567                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 568                 if (mimeType == null || !mimeType.equals(mFile.getMimetype())) {
 569                     if (mimeType != null) {
 570                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 571                     } else {
 572                         // desperate try
 573                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 574                     }
 575                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 576                     startActivity(i);
 577                     toastIt = false;
 578                 }
 579
 580             } catch (IndexOutOfBoundsException e) {
 581                 Log.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 582
 583             } catch (ActivityNotFoundException e) {
 584                 Log.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 585
 586             } catch (Throwable th) {
 587                 Log.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 588
 589             } finally {
 590                 if (toastIt) {
 591                     Toast.makeText(getActivity(), "There is no application to handle file " + mFile.getFileName(), Toast.LENGTH_SHORT).show();
 592                 }
 593             }
 594
 595         }
 596         finish();
 597     }
 598
 599     /**
 600      * Starts a the removal of the previewed file.
 601      *
 602      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 603      * depending upon the user selection in the dialog.
 604      */
 605     private void removeFile() {
 606         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 607                 R.string.confirmation_remove_alert,
 608                 new String[]{mFile.getFileName()},
 609                 R.string.confirmation_remove_remote_and_local,
 610                 R.string.confirmation_remove_local,
 611                 R.string.common_cancel);
 612         confDialog.setOnConfirmationListener(this);
 613         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 614     }
 615
 616
 617     /**
 618      * Performs the removal of the previewed file, both locally and in the server.
 619      */
 620     @Override
 621     public void onConfirmation(String callerTag) {
 622         if (mStorageManager.getFileById(mFile.getFileId()) != null) {   // check that the file is still there;
 623             stopPreview(true);
 624             mLastRemoteOperation = new RemoveFileOperation( mFile,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 625                                                             true,
 626                                                             mStorageManager);
 627             WebdavClient wc = OwnCloudClientUtils.createOwnCloudClient(mAccount, getSherlockActivity().getApplicationContext());
 628             mLastRemoteOperation.execute(wc, this, mHandler);
 629
 630             boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 631             getActivity().showDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 632         }
 633     }
 634
 635
 636     /**
 637      * Removes the file from local storage
 638      */
 639     @Override
 640     public void onNeutral(String callerTag) {
 641         // TODO this code should be made in a secondary thread,
 642         if (mFile.isDown()) {   // checks it is still there
 643             stopPreview(true);
 644             File f = new File(mFile.getStoragePath());
 645             f.delete();
 646             mFile.setStoragePath(null);
 647             mStorageManager.saveFile(mFile);
 648             finish();
 649         }
 650     }
 651
 652     /**
 653      * User cancelled the removal action.
 654      */
 655     @Override
 656     public void onCancel(String callerTag) {
 657         // nothing to do here
 658     }
 659
 660
 661     /**
 662      * {@inheritDoc}
 663      */
 664     public OCFile getFile(){
 665         return mFile;
 666     }
 667
 668     /*
 669     /**
 670      * Use this method to signal this Activity that it shall update its view.
 671      *
 672      * @param file : An {@link OCFile}
 673      *-/
 674     public void updateFileDetails(OCFile file, Account ocAccount) {
 675         mFile = file;
 676         if (ocAccount != null && (
 677                 mStorageManager == null ||
 678                 (mAccount != null && !mAccount.equals(ocAccount))
 679            )) {
 680             mStorageManager = new FileDataStorageManager(ocAccount, getActivity().getApplicationContext().getContentResolver());
 681         }
 682         mAccount = ocAccount;
 683         updateFileDetails(false);
 684     }
 685     */
 686
 687
 688     /**
 689      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 690      *
 691      * @param file      File to test if can be previewed.
 692      * @return          'True' if the file can be handled by the fragment.
 693      */
 694     public static boolean canBePreviewed(OCFile file) {
 695         return (file != null && (file.isAudio() || file.isVideo()));
 696     }
 697
 698     /**
 699      * {@inheritDoc}
 700      */
 701     @Override
 702     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 703         if (operation.equals(mLastRemoteOperation)) {
 704             if (operation instanceof RemoveFileOperation) {
 705                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 706             }
 707         }
 708     }
 709
 710     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 711         boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 712         getActivity().dismissDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 713
 714         if (result.isSuccess()) {
 715             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 716             msg.show();
 717             finish();
 718
 719         } else {
 720             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 721             msg.show();
 722             if (result.isSslRecoverableException()) {
 723                 // TODO show the SSL warning dialog
 724             }
 725         }
 726     }
 727
 728     private void stopPreview(boolean stopAudio) {
 729         if (mFile.isAudio() && stopAudio) {
 730             mMediaServiceBinder.pause();
 731
 732         } else if (mFile.isVideo()) {
 733             mVideoPreview.stopPlayback();
 734         }
 735     }
 736
 737
 738
 739     /**
 740      * Finishes the preview
 741      */
 742     private void finish() {
 743         Activity container = getActivity();
 744         if (container instanceof FileDisplayActivity) {
 745             // double pane
 746             FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
 747             transaction.replace(R.id.file_details_container, new FileDetailFragment(null, null), FileDetailFragment.FTAG); // empty FileDetailFragment
 748             transaction.commit();
 749             ((FileFragment.ContainerActivity)container).onFileStateChanged();
 750         } else {
 751             container.finish();
 752         }
 753     }
 754
 755 }