src/com/owncloud/android/ui/preview/PreviewImageFragment.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.lang.ref.WeakReference;
  20 import java.util.ArrayList;
  21 import java.util.List;
  22
  23
  24 import android.accounts.Account;
  25 import android.annotation.SuppressLint;
  26 import android.app.Activity;
  27 import android.content.ActivityNotFoundException;
  28 import android.content.Intent;
  29 import android.graphics.Bitmap;
  30 import android.graphics.BitmapFactory;
  31 import android.graphics.BitmapFactory.Options;
  32 import android.graphics.Point;
  33 import android.net.Uri;
  34 import android.os.AsyncTask;
  35 import android.os.Bundle;
  36 import android.os.Handler;
  37 import android.support.v4.app.FragmentStatePagerAdapter;
  38 import android.view.Display;
  39 import android.view.LayoutInflater;
  40 import android.view.View;
  41 import android.view.View.OnTouchListener;
  42 import android.view.ViewGroup;
  43 import android.webkit.MimeTypeMap;
  44 import android.widget.ImageView;
  45 import android.widget.ProgressBar;
  46 import android.widget.TextView;
  47 import android.widget.Toast;
  48
  49 import com.actionbarsherlock.view.Menu;
  50 import com.actionbarsherlock.view.MenuInflater;
  51 import com.actionbarsherlock.view.MenuItem;
  52 import com.owncloud.android.R;
  53 import com.owncloud.android.datamodel.FileDataStorageManager;
  54 import com.owncloud.android.datamodel.OCFile;
  55 import com.owncloud.android.lib.common.network.WebdavUtils;
  56 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  57 import com.owncloud.android.lib.common.operations.RemoteOperation;
  58 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  59 import com.owncloud.android.operations.RemoveFileOperation;
  60 import com.owncloud.android.ui.activity.FileActivity;
  61 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
  62 import com.owncloud.android.ui.fragment.FileFragment;
  63 import com.owncloud.android.utils.Log_OC;
  64
  65
  66 /**
  67  * This fragment shows a preview of a downloaded image.
  68  *
  69  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  70  *
  71  * If the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  72  *
  73  * @author David A. Velasco
  74  */
  75 public class PreviewImageFragment extends FileFragment implements   OnRemoteOperationListener,
  76                                                                         ConfirmationDialogFragment.ConfirmationDialogFragmentListener {
  77     public static final String EXTRA_FILE = "FILE";
  78     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  79
  80     private View mView;
  81     private Account mAccount;
  82     private ImageView mImageView;
  83     private TextView mMessageView;
  84     private ProgressBar mProgressWheel;
  85
  86     public Bitmap mBitmap = null;
  87
  88     private Handler mHandler;
  89     private RemoteOperation mLastRemoteOperation;
  90
  91     private static final String TAG = PreviewImageFragment.class.getSimpleName();
  92
  93     private boolean mIgnoreFirstSavedState;
  94
  95
  96     /**
  97      * Creates a fragment to preview an image.
  98      *
  99      * When 'imageFile' or 'ocAccount' are null
 100      *
 101      * @param imageFile                 An {@link OCFile} to preview as an image in the fragment
 102      * @param ocAccount                 An ownCloud account; needed to start downloads
 103      * @param ignoreFirstSavedState     Flag to work around an unexpected behaviour of {@link FragmentStatePagerAdapter}; TODO better solution
 104      */
 105     public PreviewImageFragment(OCFile fileToDetail, Account ocAccount, boolean ignoreFirstSavedState) {
 106         super(fileToDetail);
 107         mAccount = ocAccount;
 108         mIgnoreFirstSavedState = ignoreFirstSavedState;
 109     }
 110
 111
 112     /**
 113      *  Creates an empty fragment for image previews.
 114      *
 115      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 116      *
 117      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 118      */
 119     public PreviewImageFragment() {
 120         super();
 121         mAccount = null;
 122         mIgnoreFirstSavedState = false;
 123     }
 124
 125
 126     /**
 127      * {@inheritDoc}
 128      */
 129     @Override
 130     public void onCreate(Bundle savedInstanceState) {
 131         super.onCreate(savedInstanceState);
 132         mHandler = new Handler();
 133         setHasOptionsMenu(true);
 134     }
 135
 136
 137     /**
 138      * {@inheritDoc}
 139      */
 140     @Override
 141     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 142             Bundle savedInstanceState) {
 143         super.onCreateView(inflater, container, savedInstanceState);
 144         mView = inflater.inflate(R.layout.preview_image_fragment, container, false);
 145         mImageView = (ImageView)mView.findViewById(R.id.image);
 146         mImageView.setVisibility(View.GONE);
 147         mView.setOnTouchListener((OnTouchListener)getActivity());   // WATCH OUT THAT CAST
 148         mMessageView = (TextView)mView.findViewById(R.id.message);
 149         mMessageView.setVisibility(View.GONE);
 150         mProgressWheel = (ProgressBar)mView.findViewById(R.id.progressWheel);
 151         mProgressWheel.setVisibility(View.VISIBLE);
 152         return mView;
 153     }
 154
 155
 156     /**
 157      * {@inheritDoc}
 158      */
 159     @Override
 160     public void onAttach(Activity activity) {
 161         super.onAttach(activity);
 162         if (!(activity instanceof FileFragment.ContainerActivity))
 163             throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
 164     }
 165
 166
 167     /**
 168      * {@inheritDoc}
 169      */
 170     @Override
 171     public void onActivityCreated(Bundle savedInstanceState) {
 172         super.onActivityCreated(savedInstanceState);
 173         if (savedInstanceState != null) {
 174             if (!mIgnoreFirstSavedState) {
 175                 OCFile file = (OCFile)savedInstanceState.getParcelable(PreviewImageFragment.EXTRA_FILE);
 176                 mAccount = savedInstanceState.getParcelable(PreviewImageFragment.EXTRA_ACCOUNT);
 177
 178                 // Update the file
 179                 if (mAccount!= null) {
 180                     OCFile updatedFile = ((FileActivity)getSherlockActivity()).
 181                             getStorageManager().getFileByPath(file.getRemotePath());
 182                     if (updatedFile != null) {
 183                         setFile(updatedFile);
 184                     } else {
 185                         setFile(file);
 186                     }
 187                 } else {
 188                     setFile(file);
 189                 }
 190
 191             } else {
 192                 mIgnoreFirstSavedState = false;
 193             }
 194         }
 195         if (getFile() == null) {
 196             throw new IllegalStateException("Instanced with a NULL OCFile");
 197         }
 198         if (mAccount == null) {
 199             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 200         }
 201         if (!getFile().isDown()) {
 202             throw new IllegalStateException("There is no local file to preview");
 203         }
 204     }
 205
 206
 207     /**
 208      * {@inheritDoc}
 209      */
 210     @Override
 211     public void onSaveInstanceState(Bundle outState) {
 212         super.onSaveInstanceState(outState);
 213         outState.putParcelable(PreviewImageFragment.EXTRA_FILE, getFile());
 214         outState.putParcelable(PreviewImageFragment.EXTRA_ACCOUNT, mAccount);
 215     }
 216
 217
 218     @Override
 219     public void onStart() {
 220         super.onStart();
 221         if (getFile() != null) {
 222            BitmapLoader bl = new BitmapLoader(mImageView, mMessageView, mProgressWheel);
 223            bl.execute(new String[]{getFile().getStoragePath()});
 224         }
 225     }
 226
 227
 228     /**
 229      * {@inheritDoc}
 230      */
 231     @Override
 232     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 233         super.onCreateOptionsMenu(menu, inflater);
 234
 235         inflater.inflate(R.menu.file_actions_menu, menu);
 236         List<Integer> toHide = new ArrayList<Integer>();
 237
 238         MenuItem item = null;
 239         toHide.add(R.id.action_cancel_download);
 240         toHide.add(R.id.action_cancel_upload);
 241         toHide.add(R.id.action_download_file);
 242         toHide.add(R.id.action_rename_file);    // by now
 243
 244         // Options shareLink
 245         if (!getFile().isShareByLink()) {
 246             toHide.add(R.id.action_unshare_file);
 247         }
 248
 249         // Send file
 250         boolean sendEnabled = getString(R.string.send_files_to_other_apps).equalsIgnoreCase("on");
 251         if (!sendEnabled) {
 252             toHide.add(R.id.action_send_file);
 253         }
 254
 255         for (int i : toHide) {
 256             item = menu.findItem(i);
 257             if (item != null) {
 258                 item.setVisible(false);
 259                 item.setEnabled(false);
 260             }
 261         }
 262
 263     }
 264
 265     /**
 266      * {@inheritDoc}
 267      */
 268     @Override
 269     public void onPrepareOptionsMenu(Menu menu) {
 270         super.onPrepareOptionsMenu(menu);
 271
 272         MenuItem item = menu.findItem(R.id.action_unshare_file);
 273         // Options shareLink
 274         OCFile file = ((FileActivity) getSherlockActivity()).getFile();
 275         if (!file.isShareByLink()) {
 276             item.setVisible(false);
 277             item.setEnabled(false);
 278         } else {
 279             item.setVisible(true);
 280             item.setEnabled(true);
 281         }
 282
 283     }
 284
 285
 286
 287     /**
 288      * {@inheritDoc}
 289      */
 290     @Override
 291     public boolean onOptionsItemSelected(MenuItem item) {
 292         switch (item.getItemId()) {
 293             case R.id.action_share_file: {
 294                 FileActivity act = (FileActivity)getSherlockActivity();
 295                 act.getFileOperationsHelper().shareFileWithLink(getFile(), act);
 296                 return true;
 297             }
 298             case R.id.action_unshare_file: {
 299                 FileActivity act = (FileActivity)getSherlockActivity();
 300                 act.getFileOperationsHelper().unshareFileWithLink(getFile(), act);
 301                 return true;
 302             }
 303             case R.id.action_open_file_with: {
 304                 openFile();
 305                 return true;
 306             }
 307             case R.id.action_remove_file: {
 308                 removeFile();
 309                 return true;
 310             }
 311             case R.id.action_see_details: {
 312                 seeDetails();
 313                 return true;
 314             }
 315             case R.id.action_send_file: {
 316                 FileActivity act = (FileActivity)getSherlockActivity();
 317                 act.getFileOperationsHelper().sendDownloadedFile(getFile(), act);
 318                 return true;
 319             }
 320
 321             default:
 322                 return false;
 323         }
 324     }
 325
 326
 327     private void seeDetails() {
 328         ((FileFragment.ContainerActivity)getActivity()).showDetails(getFile());
 329     }
 330
 331
 332     @Override
 333     public void onResume() {
 334         super.onResume();
 335     }
 336
 337
 338     @Override
 339     public void onPause() {
 340         super.onPause();
 341     }
 342
 343
 344     @Override
 345     public void onDestroy() {
 346         super.onDestroy();
 347         if (mBitmap != null) {
 348             mBitmap.recycle();
 349         }
 350     }
 351
 352
 353     /**
 354      * Opens the previewed image with an external application.
 355      *
 356      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 357      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 358      * available apps for the MIME type known from the file extension, to let the user choose
 359      */
 360     private void openFile() {
 361         OCFile file = getFile();
 362         String storagePath = file.getStoragePath();
 363         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 364         try {
 365             Intent i = new Intent(Intent.ACTION_VIEW);
 366             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
 367             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 368             startActivity(i);
 369
 370         } catch (Throwable t) {
 371             Log_OC.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + file.getMimetype());
 372             boolean toastIt = true;
 373             String mimeType = "";
 374             try {
 375                 Intent i = new Intent(Intent.ACTION_VIEW);
 376                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 377                 if (mimeType == null || !mimeType.equals(file.getMimetype())) {
 378                     if (mimeType != null) {
 379                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 380                     } else {
 381                         // desperate try
 382                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 383                     }
 384                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 385                     startActivity(i);
 386                     toastIt = false;
 387                 }
 388
 389             } catch (IndexOutOfBoundsException e) {
 390                 Log_OC.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 391
 392             } catch (ActivityNotFoundException e) {
 393                 Log_OC.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 394
 395             } catch (Throwable th) {
 396                 Log_OC.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 397
 398             } finally {
 399                 if (toastIt) {
 400                     Toast.makeText(getActivity(), "There is no application to handle file " + file.getFileName(), Toast.LENGTH_SHORT).show();
 401                 }
 402             }
 403
 404         }
 405         finish();
 406     }
 407
 408
 409     /**
 410      * Starts a the removal of the previewed file.
 411      *
 412      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 413      * depending upon the user selection in the dialog.
 414      */
 415     private void removeFile() {
 416         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 417                 R.string.confirmation_remove_alert,
 418                 new String[]{getFile().getFileName()},
 419                 R.string.confirmation_remove_remote_and_local,
 420                 R.string.confirmation_remove_local,
 421                 R.string.common_cancel);
 422         confDialog.setOnConfirmationListener(this);
 423         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 424     }
 425
 426
 427     /**
 428      * Performs the removal of the previewed file, both locally and in the server.
 429      */
 430     @Override
 431     public void onConfirmation(String callerTag) {
 432         FileDataStorageManager storageManager =
 433                 ((FileActivity)getSherlockActivity()).getStorageManager();
 434         if (storageManager.getFileById(getFile().getFileId()) != null) {   // check that the file is still there;
 435             mLastRemoteOperation = new RemoveFileOperation( getFile(),      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 436                                                             true,
 437                                                             storageManager);
 438             mLastRemoteOperation.execute(mAccount, getSherlockActivity(), this, mHandler, getSherlockActivity());
 439
 440             ((FileActivity) getActivity()).showLoadingDialog();
 441         }
 442     }
 443
 444
 445     /**
 446      * Removes the file from local storage
 447      */
 448     @Override
 449     public void onNeutral(String callerTag) {
 450         OCFile file = getFile();
 451         ((FileActivity)getSherlockActivity()).getStorageManager().removeFile(file, false, true);    // TODO perform in background task / new thread
 452         finish();
 453     }
 454
 455     /**
 456      * User cancelled the removal action.
 457      */
 458     @Override
 459     public void onCancel(String callerTag) {
 460         // nothing to do here
 461     }
 462
 463
 464     private class BitmapLoader extends AsyncTask<String, Void, Bitmap> {
 465
 466         /**
 467          * Weak reference to the target {@link ImageView} where the bitmap will be loaded into.
 468          *
 469          * Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
 470          */
 471         private final WeakReference<ImageView> mImageViewRef;
 472
 473         /**
 474          * Weak reference to the target {@link TextView} where error messages will be written.
 475          *
 476          * Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
 477          */
 478         private final WeakReference<TextView> mMessageViewRef;
 479
 480
 481         /**
 482          * Weak reference to the target {@link Progressbar} shown while the load is in progress.
 483          *
 484          * Using a weak reference will avoid memory leaks if the target ImageView is retired from memory before the load finishes.
 485          */
 486         private final WeakReference<ProgressBar> mProgressWheelRef;
 487
 488
 489         /**
 490          * Error message to show when a load fails
 491          */
 492         private int mErrorMessageId;
 493
 494
 495         /**
 496          * Constructor.
 497          *
 498          * @param imageView     Target {@link ImageView} where the bitmap will be loaded into.
 499          */
 500         public BitmapLoader(ImageView imageView, TextView messageView, ProgressBar progressWheel) {
 501             mImageViewRef = new WeakReference<ImageView>(imageView);
 502             mMessageViewRef = new WeakReference<TextView>(messageView);
 503             mProgressWheelRef = new WeakReference<ProgressBar>(progressWheel);
 504         }
 505
 506
 507         @SuppressWarnings("deprecation")
 508         @SuppressLint({ "NewApi", "NewApi", "NewApi" }) // to avoid Lint errors since Android SDK r20
 509                 @Override
 510         protected Bitmap doInBackground(String... params) {
 511             Bitmap result = null;
 512             if (params.length != 1) return result;
 513             String storagePath = params[0];
 514             try {
 515                 // set desired options that will affect the size of the bitmap
 516                 BitmapFactory.Options options = new Options();
 517                 options.inScaled = true;
 518                 options.inPurgeable = true;
 519                 if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD_MR1) {
 520                     options.inPreferQualityOverSpeed = false;
 521                 }
 522                 if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
 523                     options.inMutable = false;
 524                 }
 525                 // make a false load of the bitmap - just to be able to read outWidth, outHeight and outMimeType
 526                 options.inJustDecodeBounds = true;
 527                 BitmapFactory.decodeFile(storagePath, options);
 528
 529                 int width = options.outWidth;
 530                 int height = options.outHeight;
 531                 int scale = 1;
 532
 533                 Display display = getActivity().getWindowManager().getDefaultDisplay();
 534                 Point size = new Point();
 535                 int screenWidth;
 536                 int screenHeight;
 537                 if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB_MR2) {
 538                     display.getSize(size);
 539                     screenWidth = size.x;
 540                     screenHeight = size.y;
 541                 } else {
 542                     screenWidth = display.getWidth();
 543                     screenHeight = display.getHeight();
 544                 }
 545
 546                 if (width > screenWidth) {
 547                     // second try to scale down the image , this time depending upon the screen size
 548                     scale = (int) Math.floor((float)width / screenWidth);
 549                 }
 550                 if (height > screenHeight) {
 551                     scale = Math.max(scale, (int) Math.floor((float)height / screenHeight));
 552                 }
 553                 options.inSampleSize = scale;
 554
 555                 // really load the bitmap
 556                 options.inJustDecodeBounds = false; // the next decodeFile call will be real
 557                 result = BitmapFactory.decodeFile(storagePath, options);
 558                 //Log_OC.d(TAG, "Image loaded - width: " + options.outWidth + ", loaded height: " + options.outHeight);
 559
 560                 if (result == null) {
 561                     mErrorMessageId = R.string.preview_image_error_unknown_format;
 562                     Log_OC.e(TAG, "File could not be loaded as a bitmap: " + storagePath);
 563                 }
 564
 565             } catch (OutOfMemoryError e) {
 566                 mErrorMessageId = R.string.preview_image_error_unknown_format;
 567                 Log_OC.e(TAG, "Out of memory occured for file " + storagePath, e);
 568
 569             } catch (NoSuchFieldError e) {
 570                 mErrorMessageId = R.string.common_error_unknown;
 571                 Log_OC.e(TAG, "Error from access to unexisting field despite protection; file " + storagePath, e);
 572
 573             } catch (Throwable t) {
 574                 mErrorMessageId = R.string.common_error_unknown;
 575                 Log_OC.e(TAG, "Unexpected error loading " + getFile().getStoragePath(), t);
 576
 577             }
 578             return result;
 579         }
 580
 581         @Override
 582         protected void onPostExecute(Bitmap result) {
 583             hideProgressWheel();
 584             if (result != null) {
 585                 showLoadedImage(result);
 586             } else {
 587                 showErrorMessage();
 588             }
 589         }
 590
 591         private void showLoadedImage(Bitmap result) {
 592             if (mImageViewRef != null) {
 593                 final ImageView imageView = mImageViewRef.get();
 594                 if (imageView != null) {
 595                     imageView.setImageBitmap(result);
 596                     imageView.setVisibility(View.VISIBLE);
 597                     mBitmap  = result;
 598                 } // else , silently finish, the fragment was destroyed
 599             }
 600             if (mMessageViewRef != null) {
 601                 final TextView messageView = mMessageViewRef.get();
 602                 if (messageView != null) {
 603                     messageView.setVisibility(View.GONE);
 604                 } // else , silently finish, the fragment was destroyed
 605             }
 606         }
 607
 608         private void showErrorMessage() {
 609             if (mImageViewRef != null) {
 610                 final ImageView imageView = mImageViewRef.get();
 611                 if (imageView != null) {
 612                     // shows the default error icon
 613                     imageView.setVisibility(View.VISIBLE);
 614                 } // else , silently finish, the fragment was destroyed
 615             }
 616             if (mMessageViewRef != null) {
 617                 final TextView messageView = mMessageViewRef.get();
 618                 if (messageView != null) {
 619                     messageView.setText(mErrorMessageId);
 620                     messageView.setVisibility(View.VISIBLE);
 621                 } // else , silently finish, the fragment was destroyed
 622             }
 623         }
 624
 625         private void hideProgressWheel() {
 626             if (mProgressWheelRef != null) {
 627                 final ProgressBar progressWheel = mProgressWheelRef.get();
 628                 if (progressWheel != null) {
 629                     progressWheel.setVisibility(View.GONE);
 630                 }
 631             }
 632         }
 633
 634     }
 635
 636     /**
 637      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewImageFragment} to be previewed.
 638      *
 639      * @param file      File to test if can be previewed.
 640      * @return          'True' if the file can be handled by the fragment.
 641      */
 642     public static boolean canBePreviewed(OCFile file) {
 643         return (file != null && file.isImage());
 644     }
 645
 646
 647     /**
 648      * {@inheritDoc}
 649      */
 650     @Override
 651     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 652         if (operation.equals(mLastRemoteOperation) && operation instanceof RemoveFileOperation) {
 653             onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 654         }
 655     }
 656
 657     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 658         ((FileActivity) getActivity()).dismissLoadingDialog();
 659
 660         if (result.isSuccess()) {
 661             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 662             msg.show();
 663             finish();
 664
 665         } else {
 666             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 667             msg.show();
 668             if (result.isSslRecoverableException()) {
 669                 // TODO show the SSL warning dialog
 670             }
 671         }
 672     }
 673
 674     /**
 675      * Finishes the preview
 676      */
 677     private void finish() {
 678         Activity container = getActivity();
 679         container.finish();
 680     }
 681
 682
 683 }