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.ActivityNotFoundException;
  26 import android.content.ComponentName;
  27 import android.content.Context;
  28 import android.content.DialogInterface;
  29 import android.content.Intent;
  30 import android.content.ServiceConnection;
  31 import android.content.res.Configuration;
  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.view.LayoutInflater;
  42 import android.view.MotionEvent;
  43 import android.view.View;
  44 import android.view.View.OnTouchListener;
  45 import android.view.ViewGroup;
  46 import android.webkit.MimeTypeMap;
  47 import android.widget.ImageView;
  48 import android.widget.Toast;
  49 import android.widget.VideoView;
  50
  51 import com.actionbarsherlock.view.Menu;
  52 import com.actionbarsherlock.view.MenuInflater;
  53 import com.actionbarsherlock.view.MenuItem;
  54 import com.owncloud.android.R;
  55 import com.owncloud.android.datamodel.FileDataStorageManager;
  56 import com.owncloud.android.datamodel.OCFile;
  57 import com.owncloud.android.media.MediaControlView;
  58 import com.owncloud.android.media.MediaService;
  59 import com.owncloud.android.media.MediaServiceBinder;
  60 import com.owncloud.android.lib.network.webdav.WebdavUtils;
  61 import com.owncloud.android.lib.operations.common.OnRemoteOperationListener;
  62 import com.owncloud.android.lib.operations.common.RemoteOperation;
  63 import com.owncloud.android.lib.operations.common.RemoteOperationResult;
  64 import com.owncloud.android.operations.RemoveFileOperation;
  65 import com.owncloud.android.ui.activity.FileActivity;
  66 import com.owncloud.android.ui.activity.FileDisplayActivity;
  67 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
  68 import com.owncloud.android.ui.fragment.FileFragment;
  69 import com.owncloud.android.utils.Log_OC;
  70
  71
  72 /**
  73  * This fragment shows a preview of a downloaded media file (audio or video).
  74  *
  75  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  76  *
  77  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  78  *
  79  * @author David A. Velasco
  80  */
  81 public class PreviewMediaFragment extends FileFragment implements
  82         OnTouchListener,
  83         ConfirmationDialogFragment.ConfirmationDialogFragmentListener, OnRemoteOperationListener  {
  84
  85     public static final String EXTRA_FILE = "FILE";
  86     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  87     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  88     private static final String EXTRA_PLAYING = "PLAYING";
  89
  90     private View mView;
  91     private Account mAccount;
  92     private FileDataStorageManager mStorageManager;
  93     private ImageView mImagePreview;
  94     private VideoView mVideoPreview;
  95     private int mSavedPlaybackPosition;
  96
  97     private Handler mHandler;
  98     private RemoteOperation mLastRemoteOperation;
  99
 100     private MediaServiceBinder mMediaServiceBinder = null;
 101     private MediaControlView mMediaController = null;
 102     private MediaServiceConnection mMediaServiceConnection = null;
 103     private VideoHelper mVideoHelper;
 104     private boolean mAutoplay;
 105     public boolean mPrepared;
 106
 107     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 108
 109
 110     /**
 111      * Creates a fragment to preview a file.
 112      *
 113      * When 'fileToDetail' or 'ocAccount' are null
 114      *
 115      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 116      * @param ocAccount         An ownCloud account; needed to start downloads
 117      */
 118     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount, int startPlaybackPosition, boolean autoplay) {
 119         super(fileToDetail);
 120         mAccount = ocAccount;
 121         mSavedPlaybackPosition = startPlaybackPosition;
 122         mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
 123         mAutoplay = autoplay;
 124     }
 125
 126
 127     /**
 128      *  Creates an empty fragment for previews.
 129      *
 130      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 131      *
 132      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 133      */
 134     public PreviewMediaFragment() {
 135         super();
 136         mAccount = null;
 137         mSavedPlaybackPosition = 0;
 138         mStorageManager = null;
 139         mAutoplay = true;
 140     }
 141
 142
 143     /**
 144      * {@inheritDoc}
 145      */
 146     @Override
 147     public void onCreate(Bundle savedInstanceState) {
 148         super.onCreate(savedInstanceState);
 149         mHandler = new Handler();
 150         setHasOptionsMenu(true);
 151     }
 152
 153
 154     /**
 155      * {@inheritDoc}
 156      */
 157     @Override
 158     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 159             Bundle savedInstanceState) {
 160         super.onCreateView(inflater, container, savedInstanceState);
 161         Log_OC.e(TAG, "onCreateView");
 162
 163
 164         mView = inflater.inflate(R.layout.file_preview, container, false);
 165
 166         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 167         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 168         mVideoPreview.setOnTouchListener(this);
 169
 170         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 171
 172         return mView;
 173     }
 174
 175
 176     /**
 177      * {@inheritDoc}
 178      */
 179     @Override
 180     public void onAttach(Activity activity) {
 181         super.onAttach(activity);
 182         Log_OC.e(TAG, "onAttach");
 183
 184         if (!(activity instanceof FileFragment.ContainerActivity))
 185             throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
 186     }
 187
 188
 189     /**
 190      * {@inheritDoc}
 191      */
 192     @Override
 193     public void onActivityCreated(Bundle savedInstanceState) {
 194         super.onActivityCreated(savedInstanceState);
 195         Log_OC.e(TAG, "onActivityCreated");
 196
 197         mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());
 198         if (savedInstanceState != null) {
 199             setFile((OCFile)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         OCFile file = getFile();
 206         if (file == null) {
 207             throw new IllegalStateException("Instanced with a NULL OCFile");
 208         }
 209         if (mAccount == null) {
 210             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 211         }
 212         if (!file.isDown()) {
 213             throw new IllegalStateException("There is no local file to preview");
 214         }
 215         if (file.isVideo()) {
 216             mVideoPreview.setVisibility(View.VISIBLE);
 217             mImagePreview.setVisibility(View.GONE);
 218             prepareVideo();
 219
 220         } else {
 221             mVideoPreview.setVisibility(View.GONE);
 222             mImagePreview.setVisibility(View.VISIBLE);
 223         }
 224
 225     }
 226
 227
 228     /**
 229      * {@inheritDoc}
 230      */
 231     @Override
 232     public void onSaveInstanceState(Bundle outState) {
 233         super.onSaveInstanceState(outState);
 234         Log_OC.e(TAG, "onSaveInstanceState");
 235
 236         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, getFile());
 237         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 238
 239         if (getFile().isVideo()) {
 240             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 241             mAutoplay = mVideoPreview.isPlaying();
 242             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mSavedPlaybackPosition);
 243             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mAutoplay);
 244         } else {
 245             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mMediaServiceBinder.getCurrentPosition());
 246             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mMediaServiceBinder.isPlaying());
 247         }
 248     }
 249
 250
 251     @Override
 252     public void onStart() {
 253         super.onStart();
 254         Log_OC.e(TAG, "onStart");
 255
 256         OCFile file = getFile();
 257         if (file != null) {
 258            if (file.isAudio()) {
 259                bindMediaService();
 260
 261            } else if (file.isVideo()) {
 262                stopAudio();
 263                playVideo();
 264            }
 265         }
 266     }
 267
 268
 269     private void stopAudio() {
 270         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 271         i.setAction(MediaService.ACTION_STOP_ALL);
 272         getSherlockActivity().startService(i);
 273     }
 274
 275
 276     /**
 277      * {@inheritDoc}
 278      */
 279     @Override
 280     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 281         super.onCreateOptionsMenu(menu, inflater);
 282
 283         inflater.inflate(R.menu.file_actions_menu, menu);
 284         List<Integer> toHide = new ArrayList<Integer>();
 285
 286         MenuItem item = null;
 287         toHide.add(R.id.action_cancel_download);
 288         toHide.add(R.id.action_cancel_upload);
 289         toHide.add(R.id.action_download_file);
 290         toHide.add(R.id.action_sync_file);
 291         toHide.add(R.id.action_rename_file);    // by now
 292
 293         for (int i : toHide) {
 294             item = menu.findItem(i);
 295             if (item != null) {
 296                 item.setVisible(false);
 297                 item.setEnabled(false);
 298             }
 299         }
 300
 301     }
 302
 303
 304     /**
 305      * {@inheritDoc}
 306      */
 307     @Override
 308     public boolean onOptionsItemSelected(MenuItem item) {
 309         switch (item.getItemId()) {
 310             case R.id.action_share_file: {
 311                 shareFileWithLink();
 312                 return true;
 313             }
 314             case R.id.action_open_file_with: {
 315                 openFile();
 316                 return true;
 317             }
 318             case R.id.action_remove_file: {
 319                 removeFile();
 320                 return true;
 321             }
 322             case R.id.action_see_details: {
 323                 seeDetails();
 324                 return true;
 325             }
 326
 327             default:
 328                 return false;
 329         }
 330     }
 331
 332
 333     private void shareFileWithLink() {
 334         stopPreview(false);
 335         FileActivity activity = (FileActivity)((FileFragment.ContainerActivity)getActivity());
 336         activity.getFileOperationsHelper().shareFileWithLink(getFile(), activity);
 337
 338     }
 339
 340
 341     private void seeDetails() {
 342         stopPreview(false);
 343         ((FileFragment.ContainerActivity)getActivity()).showDetails(getFile());
 344     }
 345
 346
 347     private void prepareVideo() {
 348         // create helper to get more control on the playback
 349         mVideoHelper = new VideoHelper();
 350         mVideoPreview.setOnPreparedListener(mVideoHelper);
 351         mVideoPreview.setOnCompletionListener(mVideoHelper);
 352         mVideoPreview.setOnErrorListener(mVideoHelper);
 353     }
 354
 355     private void playVideo() {
 356         // create and prepare control panel for the user
 357         mMediaController.setMediaPlayer(mVideoPreview);
 358
 359         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 360         mVideoPreview.setVideoPath(getFile().getStoragePath());
 361     }
 362
 363
 364     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 365
 366         /**
 367          * Called when the file is ready to be played.
 368          *
 369          * Just starts the playback.
 370          *
 371          * @param   mp    {@link MediaPlayer} instance performing the playback.
 372          */
 373         @Override
 374         public void onPrepared(MediaPlayer vp) {
 375             Log_OC.e(TAG, "onPrepared");
 376             mVideoPreview.seekTo(mSavedPlaybackPosition);
 377             if (mAutoplay) {
 378                 mVideoPreview.start();
 379             }
 380             mMediaController.setEnabled(true);
 381             mMediaController.updatePausePlay();
 382             mPrepared = true;
 383         }
 384
 385
 386         /**
 387          * Called when the file is finished playing.
 388          *
 389          * Finishes the activity.
 390          *
 391          * @param   mp    {@link MediaPlayer} instance performing the playback.
 392          */
 393         @Override
 394         public void onCompletion(MediaPlayer  mp) {
 395             Log_OC.e(TAG, "completed");
 396             if (mp != null) {
 397                 mVideoPreview.seekTo(0);
 398                 // next lines are necessary to work around undesired video loops
 399                 if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD) {
 400                     mVideoPreview.pause();
 401
 402                 } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD_MR1) {
 403                     // mVideePreview.pause() is not enough
 404
 405                     mMediaController.setEnabled(false);
 406                     mVideoPreview.stopPlayback();
 407                     mAutoplay = false;
 408                     mSavedPlaybackPosition = 0;
 409                     mVideoPreview.setVideoPath(getFile().getStoragePath());
 410                 }
 411             } // else : called from onError()
 412             mMediaController.updatePausePlay();
 413         }
 414
 415
 416         /**
 417          * Called when an error in playback occurs.
 418          *
 419          * @param   mp      {@link MediaPlayer} instance performing the playback.
 420          * @param   what    Type of error
 421          * @param   extra   Extra code specific to the error
 422          */
 423         @Override
 424         public boolean onError(MediaPlayer mp, int what, int extra) {
 425             if (mVideoPreview.getWindowToken() != null) {
 426                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 427                 new AlertDialog.Builder(getActivity())
 428                         .setMessage(message)
 429                         .setPositiveButton(android.R.string.VideoView_error_button,
 430                                 new DialogInterface.OnClickListener() {
 431                                     public void onClick(DialogInterface dialog, int whichButton) {
 432                                         dialog.dismiss();
 433                                         VideoHelper.this.onCompletion(null);
 434                                     }
 435                                 })
 436                         .setCancelable(false)
 437                         .show();
 438             }
 439             return true;
 440         }
 441
 442     }
 443
 444
 445     @Override
 446     public void onPause() {
 447         super.onPause();
 448         Log_OC.e(TAG, "onPause");
 449     }
 450
 451     @Override
 452     public void onResume() {
 453         super.onResume();
 454         Log_OC.e(TAG, "onResume");
 455     }
 456
 457     @Override
 458     public void onDestroy() {
 459         super.onDestroy();
 460         Log_OC.e(TAG, "onDestroy");
 461     }
 462
 463     @Override
 464     public void onStop() {
 465         Log_OC.e(TAG, "onStop");
 466         super.onStop();
 467
 468         mPrepared = false;
 469         if (mMediaServiceConnection != null) {
 470             Log_OC.d(TAG, "Unbinding from MediaService ...");
 471             if (mMediaServiceBinder != null && mMediaController != null) {
 472                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 473             }
 474             getActivity().unbindService(mMediaServiceConnection);
 475             mMediaServiceConnection = null;
 476             mMediaServiceBinder = null;
 477         }
 478     }
 479
 480     @Override
 481     public boolean onTouch(View v, MotionEvent event) {
 482         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 483             startFullScreenVideo();
 484             return true;
 485         }
 486         return false;
 487     }
 488
 489
 490     private void startFullScreenVideo() {
 491         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 492         i.putExtra(FileActivity.EXTRA_ACCOUNT, mAccount);
 493         i.putExtra(FileActivity.EXTRA_FILE, getFile());
 494         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 495         mVideoPreview.pause();
 496         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 497         startActivityForResult(i, 0);
 498     }
 499
 500     @Override
 501     public void onConfigurationChanged (Configuration newConfig) {
 502         Log_OC.e(TAG, "onConfigurationChanged " + this);
 503     }
 504
 505     @Override
 506     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 507         Log_OC.e(TAG, "onActivityResult " + this);
 508         super.onActivityResult(requestCode, resultCode, data);
 509         if (resultCode == Activity.RESULT_OK) {
 510             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 511             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 512         }
 513     }
 514
 515
 516     private void playAudio() {
 517         OCFile file = getFile();
 518         if (!mMediaServiceBinder.isPlaying(file)) {
 519             Log_OC.d(TAG, "starting playback of " + file.getStoragePath());
 520             mMediaServiceBinder.start(mAccount, file, mAutoplay, mSavedPlaybackPosition);
 521
 522         } else {
 523             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 524                 mMediaServiceBinder.start();
 525                 mMediaController.updatePausePlay();
 526             }
 527         }
 528     }
 529
 530
 531     private void bindMediaService() {
 532         Log_OC.d(TAG, "Binding to MediaService...");
 533         if (mMediaServiceConnection == null) {
 534             mMediaServiceConnection = new MediaServiceConnection();
 535         }
 536         getActivity().bindService(  new Intent(getActivity(),
 537                                     MediaService.class),
 538                                     mMediaServiceConnection,
 539                                     Context.BIND_AUTO_CREATE);
 540             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 541     }
 542
 543     /** Defines callbacks for service binding, passed to bindService() */
 544     private class MediaServiceConnection implements ServiceConnection {
 545
 546         @Override
 547         public void onServiceConnected(ComponentName component, IBinder service) {
 548             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 549                 Log_OC.d(TAG, "Media service connected");
 550                 mMediaServiceBinder = (MediaServiceBinder) service;
 551                 if (mMediaServiceBinder != null) {
 552                     prepareMediaController();
 553                     playAudio();    // do not wait for the touch of nobody to play audio
 554
 555                     Log_OC.d(TAG, "Successfully bound to MediaService, MediaController ready");
 556
 557                 } else {
 558                     Log_OC.e(TAG, "Unexpected response from MediaService while binding");
 559                 }
 560             }
 561         }
 562
 563         private void prepareMediaController() {
 564             mMediaServiceBinder.registerMediaController(mMediaController);
 565             if (mMediaController != null) {
 566                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 567                 mMediaController.setEnabled(true);
 568                 mMediaController.updatePausePlay();
 569             }
 570         }
 571
 572         @Override
 573         public void onServiceDisconnected(ComponentName component) {
 574             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 575                 Log_OC.e(TAG, "Media service suddenly disconnected");
 576                 if (mMediaController != null) {
 577                     mMediaController.setMediaPlayer(null);
 578                 } else {
 579                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 580                 }
 581                 mMediaServiceBinder = null;
 582                 mMediaServiceConnection = null;
 583             }
 584         }
 585     }
 586
 587
 588
 589     /**
 590      * Opens the previewed file with an external application.
 591      *
 592      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 593      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 594      * available apps for the MIME type known from the file extension, to let the user choose
 595      */
 596     private void openFile() {
 597         OCFile file = getFile();
 598         stopPreview(true);
 599         String storagePath = file.getStoragePath();
 600         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 601         try {
 602             Intent i = new Intent(Intent.ACTION_VIEW);
 603             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
 604             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 605             startActivity(i);
 606
 607         } catch (Throwable t) {
 608             Log_OC.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + file.getMimetype());
 609             boolean toastIt = true;
 610             String mimeType = "";
 611             try {
 612                 Intent i = new Intent(Intent.ACTION_VIEW);
 613                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 614                 if (mimeType == null || !mimeType.equals(file.getMimetype())) {
 615                     if (mimeType != null) {
 616                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 617                     } else {
 618                         // desperate try
 619                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 620                     }
 621                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 622                     startActivity(i);
 623                     toastIt = false;
 624                 }
 625
 626             } catch (IndexOutOfBoundsException e) {
 627                 Log_OC.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 628
 629             } catch (ActivityNotFoundException e) {
 630                 Log_OC.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 631
 632             } catch (Throwable th) {
 633                 Log_OC.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 634
 635             } finally {
 636                 if (toastIt) {
 637                     Toast.makeText(getActivity(), "There is no application to handle file " + file.getFileName(), Toast.LENGTH_SHORT).show();
 638                 }
 639             }
 640
 641         }
 642         finish();
 643     }
 644
 645     /**
 646      * Starts a the removal of the previewed file.
 647      *
 648      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 649      * depending upon the user selection in the dialog.
 650      */
 651     private void removeFile() {
 652         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 653                 R.string.confirmation_remove_alert,
 654                 new String[]{getFile().getFileName()},
 655                 R.string.confirmation_remove_remote_and_local,
 656                 R.string.confirmation_remove_local,
 657                 R.string.common_cancel);
 658         confDialog.setOnConfirmationListener(this);
 659         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 660     }
 661
 662
 663     /**
 664      * Performs the removal of the previewed file, both locally and in the server.
 665      */
 666     @Override
 667     public void onConfirmation(String callerTag) {
 668         OCFile file = getFile();
 669         if (mStorageManager.getFileById(file.getFileId()) != null) {   // check that the file is still there;
 670             stopPreview(true);
 671             mLastRemoteOperation = new RemoveFileOperation( file,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 672                                                             true,
 673                                                             mStorageManager);
 674             mLastRemoteOperation.execute(mAccount, getSherlockActivity(), this, mHandler, getSherlockActivity());
 675
 676             ((FileDisplayActivity) getActivity()).showLoadingDialog();
 677         }
 678     }
 679
 680
 681     /**
 682      * Removes the file from local storage
 683      */
 684     @Override
 685     public void onNeutral(String callerTag) {
 686         OCFile file = getFile();
 687         stopPreview(true);
 688         mStorageManager.removeFile(file, false, true);    // TODO perform in background task / new thread
 689         finish();
 690     }
 691
 692     /**
 693      * User cancelled the removal action.
 694      */
 695     @Override
 696     public void onCancel(String callerTag) {
 697         // nothing to do here
 698     }
 699
 700
 701     /**
 702      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 703      *
 704      * @param file      File to test if can be previewed.
 705      * @return          'True' if the file can be handled by the fragment.
 706      */
 707     public static boolean canBePreviewed(OCFile file) {
 708         return (file != null && (file.isAudio() || file.isVideo()));
 709     }
 710
 711     /**
 712      * {@inheritDoc}
 713      */
 714     @Override
 715     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 716         if (operation.equals(mLastRemoteOperation)) {
 717             if (operation instanceof RemoveFileOperation) {
 718                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 719             }
 720         }
 721     }
 722
 723     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 724         ((FileDisplayActivity) getActivity()).dismissLoadingDialog();
 725         if (result.isSuccess()) {
 726             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 727             msg.show();
 728             finish();
 729
 730         } else {
 731             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 732             msg.show();
 733             if (result.isSslRecoverableException()) {
 734                 // TODO show the SSL warning dialog
 735             }
 736         }
 737     }
 738
 739     private void stopPreview(boolean stopAudio) {
 740         OCFile file = getFile();
 741         if (file.isAudio() && stopAudio) {
 742             mMediaServiceBinder.pause();
 743
 744         } else if (file.isVideo()) {
 745             mVideoPreview.stopPlayback();
 746         }
 747     }
 748
 749
 750
 751     /**
 752      * Finishes the preview
 753      */
 754     private void finish() {
 755         getActivity().onBackPressed();
 756     }
 757
 758
 759     public int getPosition() {
 760         if (mPrepared) {
 761             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 762         }
 763         Log_OC.e(TAG, "getting position: " + mSavedPlaybackPosition);
 764         return mSavedPlaybackPosition;
 765     }
 766
 767     public boolean isPlaying() {
 768         if (mPrepared) {
 769             mAutoplay = mVideoPreview.isPlaying();
 770         }
 771         return mAutoplay;
 772     }
 773
 774 }