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 as published by
   6  *   the Free Software Foundation, either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.preview;
  19
  20 import java.io.File;
  21 import java.util.ArrayList;
  22 import java.util.List;
  23
  24 import android.accounts.Account;
  25 import android.app.Activity;
  26 import android.app.AlertDialog;
  27 import android.content.ActivityNotFoundException;
  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.media.MediaPlayer;
  34 import android.media.MediaPlayer.OnCompletionListener;
  35 import android.media.MediaPlayer.OnErrorListener;
  36 import android.media.MediaPlayer.OnPreparedListener;
  37 import android.net.Uri;
  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             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mVideoPreview.getCurrentPosition());
 238             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mVideoPreview.isPlaying());
 239         } else {
 240             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mMediaServiceBinder.getCurrentPosition());
 241             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mMediaServiceBinder.isPlaying());
 242         }
 243     }
 244
 245
 246     @Override
 247     public void onStart() {
 248         super.onStart();
 249
 250         if (mFile != null) {
 251            if (mFile.isAudio()) {
 252                bindMediaService();
 253
 254            } else if (mFile.isVideo()) {
 255                stopAudio();
 256                playVideo();
 257            }
 258         }
 259     }
 260
 261
 262     private void stopAudio() {
 263         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 264         i.setAction(MediaService.ACTION_STOP_ALL);
 265         getSherlockActivity().startService(i);
 266     }
 267
 268
 269     /**
 270      * {@inheritDoc}
 271      */
 272     @Override
 273     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 274         super.onCreateOptionsMenu(menu, inflater);
 275
 276         inflater.inflate(R.menu.file_actions_menu, menu);
 277         List<Integer> toHide = new ArrayList<Integer>();
 278
 279         MenuItem item = null;
 280         toHide.add(R.id.action_cancel_download);
 281         toHide.add(R.id.action_cancel_upload);
 282         toHide.add(R.id.action_download_file);
 283         toHide.add(R.id.action_rename_file);    // by now
 284
 285         for (int i : toHide) {
 286             item = menu.findItem(i);
 287             if (item != null) {
 288                 item.setVisible(false);
 289                 item.setEnabled(false);
 290             }
 291         }
 292
 293     }
 294
 295
 296     /**
 297      * {@inheritDoc}
 298      */
 299     @Override
 300     public boolean onOptionsItemSelected(MenuItem item) {
 301         switch (item.getItemId()) {
 302             case R.id.action_open_file_with: {
 303                 openFile();
 304                 return true;
 305             }
 306             case R.id.action_remove_file: {
 307                 removeFile();
 308                 return true;
 309             }
 310             case R.id.action_see_details: {
 311                 seeDetails();
 312                 return true;
 313             }
 314
 315             default:
 316                 return false;
 317         }
 318     }
 319
 320
 321     private void seeDetails() {
 322         stopPreview(false);
 323         ((FileFragment.ContainerActivity)getActivity()).showFragmentWithDetails(mFile);
 324     }
 325
 326
 327     private void prepareVideo() {
 328         // create helper to get more control on the playback
 329         mVideoHelper = new VideoHelper();
 330         mVideoPreview.setOnPreparedListener(mVideoHelper);
 331         mVideoPreview.setOnCompletionListener(mVideoHelper);
 332         mVideoPreview.setOnErrorListener(mVideoHelper);
 333     }
 334
 335     private void playVideo() {
 336         // create and prepare control panel for the user
 337         mMediaController.setMediaPlayer(mVideoPreview);
 338
 339         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 340         mVideoPreview.setVideoPath(mFile.getStoragePath());
 341     }
 342
 343
 344     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 345
 346         /**
 347          * Called when the file is ready to be played.
 348          *
 349          * Just starts the playback.
 350          *
 351          * @param   mp    {@link MediaPlayer} instance performing the playback.
 352          */
 353         @Override
 354         public void onPrepared(MediaPlayer vp) {
 355             mVideoPreview.seekTo(mSavedPlaybackPosition);
 356             if (mAutoplay) {
 357                 mVideoPreview.start();
 358             }
 359             mMediaController.setEnabled(true);
 360             mMediaController.updatePausePlay();
 361         }
 362
 363
 364         /**
 365          * Called when the file is finished playing.
 366          *
 367          * Finishes the activity.
 368          *
 369          * @param   mp    {@link MediaPlayer} instance performing the playback.
 370          */
 371         @Override
 372         public void onCompletion(MediaPlayer  mp) {
 373             mVideoPreview.seekTo(0);
 374             mMediaController.updatePausePlay();
 375         }
 376
 377
 378         /**
 379          * Called when an error in playback occurs.
 380          *
 381          * @param   mp      {@link MediaPlayer} instance performing the playback.
 382          * @param   what    Type of error
 383          * @param   extra   Extra code specific to the error
 384          */
 385         @Override
 386         public boolean onError(MediaPlayer mp, int what, int extra) {
 387             if (mVideoPreview.getWindowToken() != null) {
 388                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 389                 new AlertDialog.Builder(getActivity())
 390                         .setMessage(message)
 391                         .setPositiveButton(android.R.string.VideoView_error_button,
 392                                 new DialogInterface.OnClickListener() {
 393                                     public void onClick(DialogInterface dialog, int whichButton) {
 394                                         dialog.dismiss();
 395                                         VideoHelper.this.onCompletion(null);
 396                                     }
 397                                 })
 398                         .setCancelable(false)
 399                         .show();
 400             }
 401             return true;
 402         }
 403
 404     }
 405
 406
 407     @Override
 408     public void onStop() {
 409         super.onStop();
 410
 411         if (mMediaServiceConnection != null) {
 412             Log.d(TAG, "Unbinding from MediaService ...");
 413             if (mMediaServiceBinder != null && mMediaController != null) {
 414                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 415             }
 416             getActivity().unbindService(mMediaServiceConnection);
 417             mMediaServiceConnection = null;
 418             mMediaServiceBinder = null;
 419         }
 420     }
 421
 422     @Override
 423     public boolean onTouch(View v, MotionEvent event) {
 424         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 425             startFullScreenVideo();
 426             return true;
 427         }
 428         return false;
 429     }
 430
 431
 432     private void startFullScreenVideo() {
 433         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 434         i.putExtra(PreviewVideoActivity.EXTRA_ACCOUNT, mAccount);
 435         i.putExtra(PreviewVideoActivity.EXTRA_FILE, mFile);
 436         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 437         mVideoPreview.pause();
 438         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 439         startActivityForResult(i, 0);
 440     }
 441
 442
 443     @Override
 444     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 445         super.onActivityResult(requestCode, resultCode, data);
 446         if (resultCode == Activity.RESULT_OK) {
 447             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 448             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 449         }
 450     }
 451
 452
 453     private void playAudio() {
 454         if (!mMediaServiceBinder.isPlaying(mFile)) {
 455             Log.d(TAG, "starting playback of " + mFile.getStoragePath());
 456             mMediaServiceBinder.start(mAccount, mFile, mAutoplay, mSavedPlaybackPosition);
 457
 458         } else {
 459             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 460                 mMediaServiceBinder.start();
 461                 mMediaController.updatePausePlay();
 462             }
 463         }
 464     }
 465
 466
 467     private void bindMediaService() {
 468         Log.d(TAG, "Binding to MediaService...");
 469         if (mMediaServiceConnection == null) {
 470             mMediaServiceConnection = new MediaServiceConnection();
 471         }
 472         getActivity().bindService(  new Intent(getActivity(),
 473                                     MediaService.class),
 474                                     mMediaServiceConnection,
 475                                     Context.BIND_AUTO_CREATE);
 476             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 477     }
 478
 479     /** Defines callbacks for service binding, passed to bindService() */
 480     private class MediaServiceConnection implements ServiceConnection {
 481
 482         @Override
 483         public void onServiceConnected(ComponentName component, IBinder service) {
 484             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 485                 Log.d(TAG, "Media service connected");
 486                 mMediaServiceBinder = (MediaServiceBinder) service;
 487                 if (mMediaServiceBinder != null) {
 488                     prepareMediaController();
 489                     playAudio();    // do not wait for the touch of nobody to play audio
 490
 491                     Log.d(TAG, "Successfully bound to MediaService, MediaController ready");
 492
 493                 } else {
 494                     Log.e(TAG, "Unexpected response from MediaService while binding");
 495                 }
 496             }
 497         }
 498
 499         private void prepareMediaController() {
 500             mMediaServiceBinder.registerMediaController(mMediaController);
 501             if (mMediaController != null) {
 502                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 503                 mMediaController.setEnabled(true);
 504                 mMediaController.updatePausePlay();
 505             }
 506         }
 507
 508         @Override
 509         public void onServiceDisconnected(ComponentName component) {
 510             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 511                 Log.e(TAG, "Media service suddenly disconnected");
 512                 if (mMediaController != null) {
 513                     mMediaController.setMediaPlayer(null);
 514                 } else {
 515                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 516                 }
 517                 mMediaServiceBinder = null;
 518                 mMediaServiceConnection = null;
 519             }
 520         }
 521     }
 522
 523
 524
 525     /**
 526      * Opens the previewed file with an external application.
 527      *
 528      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 529      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 530      * available apps for the MIME type known from the file extension, to let the user choose
 531      */
 532     private void openFile() {
 533         stopPreview(true);
 534         String storagePath = mFile.getStoragePath();
 535         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 536         try {
 537             Intent i = new Intent(Intent.ACTION_VIEW);
 538             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mFile.getMimetype());
 539             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 540             startActivity(i);
 541
 542         } catch (Throwable t) {
 543             Log.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + mFile.getMimetype());
 544             boolean toastIt = true;
 545             String mimeType = "";
 546             try {
 547                 Intent i = new Intent(Intent.ACTION_VIEW);
 548                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 549                 if (mimeType == null || !mimeType.equals(mFile.getMimetype())) {
 550                     if (mimeType != null) {
 551                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 552                     } else {
 553                         // desperate try
 554                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 555                     }
 556                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 557                     startActivity(i);
 558                     toastIt = false;
 559                 }
 560
 561             } catch (IndexOutOfBoundsException e) {
 562                 Log.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 563
 564             } catch (ActivityNotFoundException e) {
 565                 Log.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 566
 567             } catch (Throwable th) {
 568                 Log.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 569
 570             } finally {
 571                 if (toastIt) {
 572                     Toast.makeText(getActivity(), "There is no application to handle file " + mFile.getFileName(), Toast.LENGTH_SHORT).show();
 573                 }
 574             }
 575
 576         }
 577         finish();
 578     }
 579
 580     /**
 581      * Starts a the removal of the previewed file.
 582      *
 583      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 584      * depending upon the user selection in the dialog.
 585      */
 586     private void removeFile() {
 587         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 588                 R.string.confirmation_remove_alert,
 589                 new String[]{mFile.getFileName()},
 590                 R.string.confirmation_remove_remote_and_local,
 591                 R.string.confirmation_remove_local,
 592                 R.string.common_cancel);
 593         confDialog.setOnConfirmationListener(this);
 594         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 595     }
 596
 597
 598     /**
 599      * Performs the removal of the previewed file, both locally and in the server.
 600      */
 601     @Override
 602     public void onConfirmation(String callerTag) {
 603         if (mStorageManager.getFileById(mFile.getFileId()) != null) {   // check that the file is still there;
 604             stopPreview(true);
 605             mLastRemoteOperation = new RemoveFileOperation( mFile,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 606                                                             true,
 607                                                             mStorageManager);
 608             WebdavClient wc = OwnCloudClientUtils.createOwnCloudClient(mAccount, getSherlockActivity().getApplicationContext());
 609             mLastRemoteOperation.execute(wc, this, mHandler);
 610
 611             boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 612             getActivity().showDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 613         }
 614     }
 615
 616
 617     /**
 618      * Removes the file from local storage
 619      */
 620     @Override
 621     public void onNeutral(String callerTag) {
 622         // TODO this code should be made in a secondary thread,
 623         if (mFile.isDown()) {   // checks it is still there
 624             stopPreview(true);
 625             File f = new File(mFile.getStoragePath());
 626             f.delete();
 627             mFile.setStoragePath(null);
 628             mStorageManager.saveFile(mFile);
 629             finish();
 630         }
 631     }
 632
 633     /**
 634      * User cancelled the removal action.
 635      */
 636     @Override
 637     public void onCancel(String callerTag) {
 638         // nothing to do here
 639     }
 640
 641
 642     /**
 643      * {@inheritDoc}
 644      */
 645     public OCFile getFile(){
 646         return mFile;
 647     }
 648
 649     /*
 650     /**
 651      * Use this method to signal this Activity that it shall update its view.
 652      *
 653      * @param file : An {@link OCFile}
 654      *-/
 655     public void updateFileDetails(OCFile file, Account ocAccount) {
 656         mFile = file;
 657         if (ocAccount != null && (
 658                 mStorageManager == null ||
 659                 (mAccount != null && !mAccount.equals(ocAccount))
 660            )) {
 661             mStorageManager = new FileDataStorageManager(ocAccount, getActivity().getApplicationContext().getContentResolver());
 662         }
 663         mAccount = ocAccount;
 664         updateFileDetails(false);
 665     }
 666     */
 667
 668
 669     /**
 670      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 671      *
 672      * @param file      File to test if can be previewed.
 673      * @return          'True' if the file can be handled by the fragment.
 674      */
 675     public static boolean canBePreviewed(OCFile file) {
 676         return (file != null && (file.isAudio() || file.isVideo()));
 677     }
 678
 679     /**
 680      * {@inheritDoc}
 681      */
 682     @Override
 683     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 684         if (operation.equals(mLastRemoteOperation)) {
 685             if (operation instanceof RemoveFileOperation) {
 686                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 687             }
 688         }
 689     }
 690
 691     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 692         boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 693         getActivity().dismissDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 694
 695         if (result.isSuccess()) {
 696             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 697             msg.show();
 698             finish();
 699
 700         } else {
 701             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 702             msg.show();
 703             if (result.isSslRecoverableException()) {
 704                 // TODO show the SSL warning dialog
 705             }
 706         }
 707     }
 708
 709     private void stopPreview(boolean stopAudio) {
 710         if (mFile.isAudio() && stopAudio) {
 711             mMediaServiceBinder.pause();
 712
 713         } else if (mFile.isVideo()) {
 714             mVideoPreview.stopPlayback();
 715         }
 716     }
 717
 718
 719
 720     /**
 721      * Finishes the preview
 722      */
 723     private void finish() {
 724         Activity container = getActivity();
 725         if (container instanceof FileDisplayActivity) {
 726             // double pane
 727             FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
 728             transaction.replace(R.id.file_details_container, new FileDetailFragment(null, null), FileDetailFragment.FTAG); // empty FileDetailFragment
 729             transaction.commit();
 730             ((FileFragment.ContainerActivity)container).onFileStateChanged();
 731         } else {
 732             container.finish();
 733         }
 734     }
 735
 736 }