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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015  ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hd that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 package com.owncloud.android.ui.preview;
  21
  22 import android.annotation.SuppressLint;
  23 import android.content.BroadcastReceiver;
  24 import android.content.ComponentName;
  25 import android.content.Context;
  26 import android.content.Intent;
  27 import android.content.IntentFilter;
  28 import android.content.ServiceConnection;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.os.Handler;
  32 import android.os.IBinder;
  33 import android.os.Message;
  34 import android.support.v4.view.GravityCompat;
  35 import android.support.v4.view.ViewPager;
  36 import android.support.v4.widget.DrawerLayout;
  37 import android.support.v7.app.ActionBar;
  38 import android.view.MenuItem;
  39 import android.view.View;
  40 import android.view.Window;
  41
  42 import com.ortiz.touch.ExtendedViewPager;
  43 import com.owncloud.android.R;
  44 import com.owncloud.android.authentication.AccountUtils;
  45 import com.owncloud.android.datamodel.FileDataStorageManager;
  46 import com.owncloud.android.datamodel.OCFile;
  47 import com.owncloud.android.files.services.FileDownloader;
  48 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  49 import com.owncloud.android.files.services.FileUploader;
  50 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  51 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  52 import com.owncloud.android.lib.common.operations.RemoteOperation;
  53 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  54 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  55 import com.owncloud.android.lib.common.utils.Log_OC;
  56 import com.owncloud.android.operations.CreateShareOperation;
  57 import com.owncloud.android.operations.RemoveFileOperation;
  58 import com.owncloud.android.operations.SynchronizeFileOperation;
  59 import com.owncloud.android.operations.UnshareLinkOperation;
  60 import com.owncloud.android.ui.activity.FileActivity;
  61 import com.owncloud.android.ui.activity.FileDisplayActivity;
  62 import com.owncloud.android.ui.dialog.ShareFileDialogFragment;
  63 import com.owncloud.android.ui.fragment.FileFragment;
  64
  65
  66 /**
  67  *  Holds a swiping galley where image files contained in an ownCloud directory are shown
  68  */
  69 public class PreviewImageActivity extends FileActivity implements
  70         FileFragment.ContainerActivity,
  71         ViewPager.OnPageChangeListener, OnRemoteOperationListener {
  72
  73     public static final int DIALOG_SHORT_WAIT = 0;
  74
  75     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  76
  77     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  78     private static final String KEY_WAITING_FOR_BINDER = "WAITING_FOR_BINDER";
  79
  80     private static final int INITIAL_HIDE_DELAY = 0; // immediate hide
  81
  82     private ExtendedViewPager mViewPager;
  83     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  84     private int mSavedPosition = 0;
  85     private boolean mHasSavedPosition = false;
  86
  87     private boolean mRequestWaitingForBinder;
  88
  89     private DownloadFinishReceiver mDownloadFinishReceiver;
  90
  91     private View mFullScreenAnchorView;
  92
  93
  94     @Override
  95     protected void onCreate(Bundle savedInstanceState) {
  96         requestWindowFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
  97
  98         super.onCreate(savedInstanceState);
  99
 100         setContentView(R.layout.preview_image_activity);
 101
 102         // Navigation Drawer
 103         initDrawer();
 104
 105         // ActionBar
 106         ActionBar actionBar = getSupportActionBar();
 107         updateActionBarTitleAndHomeButton(null);
 108         actionBar.hide();
 109
 110
 111         // Make sure we're running on Honeycomb or higher to use FullScreen and
 112         // Immersive Mode
 113         if (isHoneycombOrHigher()) {
 114
 115             mFullScreenAnchorView = getWindow().getDecorView();
 116             // to keep our UI controls visibility in line with system bars
 117             // visibility
 118             mFullScreenAnchorView.setOnSystemUiVisibilityChangeListener
 119                     (new View.OnSystemUiVisibilityChangeListener() {
 120                 @SuppressLint("InlinedApi")
 121                 @Override
 122                 public void onSystemUiVisibilityChange(int flags) {
 123                     boolean visible = (flags & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 124                     ActionBar actionBar = getSupportActionBar();
 125                     if (visible) {
 126                         actionBar.show();
 127                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 128                     } else {
 129                         actionBar.hide();
 130                         mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 131                     }
 132                 }
 133             });
 134
 135             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 136                 getWindow().setStatusBarColor(getResources().getColor(R.color.owncloud_blue_dark_transparent));
 137             }
 138         }
 139
 140         if (savedInstanceState != null) {
 141             mRequestWaitingForBinder = savedInstanceState.getBoolean(KEY_WAITING_FOR_BINDER);
 142         } else {
 143             mRequestWaitingForBinder = false;
 144         }
 145
 146     }
 147
 148     private void initViewPager() {
 149         // get parent from path
 150         String parentPath = getFile().getRemotePath().substring(0,
 151                 getFile().getRemotePath().lastIndexOf(getFile().getFileName()));
 152         OCFile parentFolder = getStorageManager().getFileByPath(parentPath);
 153         if (parentFolder == null) {
 154             // should not be necessary
 155             parentFolder = getStorageManager().getFileByPath(OCFile.ROOT_PATH);
 156         }
 157
 158         // TODO Enable when "On Device" is recovered ?
 159         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(),
 160                 parentFolder, getAccount(), getStorageManager()/*, MainApp.getOnlyOnDevice()*/);
 161
 162         mViewPager = (ExtendedViewPager) findViewById(R.id.fragmentPager);
 163         int position = mHasSavedPosition ? mSavedPosition :
 164                 mPreviewImagePagerAdapter.getFilePosition(getFile());
 165         position = (position >= 0) ? position : 0;
 166         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 167         mViewPager.setOnPageChangeListener(this);
 168         mViewPager.setCurrentItem(position);
 169         if (position == 0 && !getFile().isDown()) {
 170             // this is necessary because mViewPager.setCurrentItem(0) just after setting the
 171             // adapter does not result in a call to #onPageSelected(0)
 172             mRequestWaitingForBinder = true;
 173         }
 174     }
 175
 176
 177     protected void onPostCreate(Bundle savedInstanceState)  {
 178         super.onPostCreate(savedInstanceState);
 179
 180         // Trigger the initial hide() shortly after the activity has been
 181         // created, to briefly hint to the user that UI controls
 182         // are available
 183         delayedHide(INITIAL_HIDE_DELAY);
 184
 185     }
 186
 187     Handler mHideSystemUiHandler = new Handler() {
 188         @Override
 189         public void handleMessage(Message msg) {
 190             if (isHoneycombOrHigher()) {
 191                 hideSystemUI(mFullScreenAnchorView);
 192             }
 193             getSupportActionBar().hide();
 194         }
 195     };
 196
 197     private void delayedHide(int delayMillis)   {
 198         mHideSystemUiHandler.removeMessages(0);
 199         mHideSystemUiHandler.sendEmptyMessageDelayed(0, delayMillis);
 200     }
 201
 202
 203     /// handle Window Focus changes
 204     @Override
 205     public void onWindowFocusChanged(boolean hasFocus) {
 206         super.onWindowFocusChanged(hasFocus);
 207
 208         // When the window loses focus (e.g. the action overflow is shown),
 209         // cancel any pending hide action.
 210         if (!hasFocus) {
 211             mHideSystemUiHandler.removeMessages(0);
 212         }
 213     }
 214
 215
 216
 217     @Override
 218     public void onStart() {
 219         super.onStart();
 220     }
 221
 222     @Override
 223     protected void onSaveInstanceState(Bundle outState) {
 224         super.onSaveInstanceState(outState);
 225         outState.putBoolean(KEY_WAITING_FOR_BINDER, mRequestWaitingForBinder);
 226     }
 227
 228     @Override
 229     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 230         super.onRemoteOperationFinish(operation, result);
 231
 232         if (operation instanceof CreateShareOperation) {
 233             onCreateShareOperationFinish((CreateShareOperation) operation, result);
 234
 235         } else if (operation instanceof UnshareLinkOperation) {
 236             onUnshareLinkOperationFinish((UnshareLinkOperation) operation, result);
 237
 238         } else if (operation instanceof RemoveFileOperation) {
 239             finish();
 240         } else if (operation instanceof SynchronizeFileOperation) {
 241             onSynchronizeFileOperationFinish((SynchronizeFileOperation) operation, result);
 242
 243         }
 244     }
 245
 246
 247     private void onUnshareLinkOperationFinish(UnshareLinkOperation operation,
 248                                               RemoteOperationResult result) {
 249         if (result.isSuccess()) {
 250             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 251             if (file != null) {
 252                 setFile(file);
 253             }
 254             invalidateOptionsMenu();
 255         } else if  (result.getCode() == ResultCode.SHARE_NOT_FOUND) {
 256             backToDisplayActivity();
 257         }
 258
 259     }
 260
 261     private void onCreateShareOperationFinish(CreateShareOperation operation,
 262                                               RemoteOperationResult result) {
 263         if (result.isSuccess()) {
 264             OCFile file = getStorageManager().getFileByPath(getFile().getRemotePath());
 265             if (file != null) {
 266                 setFile(file);
 267             }
 268             invalidateOptionsMenu();
 269         }
 270     }
 271
 272     private void onSynchronizeFileOperationFinish(SynchronizeFileOperation operation,
 273                                                   RemoteOperationResult result) {
 274         if (result.isSuccess()) {
 275             invalidateOptionsMenu();
 276         }
 277
 278     }
 279
 280     @Override
 281     protected ServiceConnection newTransferenceServiceConnection() {
 282         return new PreviewImageServiceConnection();
 283     }
 284
 285     /** Defines callbacks for service binding, passed to bindService() */
 286     private class PreviewImageServiceConnection implements ServiceConnection {
 287
 288         @Override
 289         public void onServiceConnected(ComponentName component, IBinder service) {
 290
 291             if (component.equals(new ComponentName(PreviewImageActivity.this,
 292                     FileDownloader.class))) {
 293                 mDownloaderBinder = (FileDownloaderBinder) service;
 294                 if (mRequestWaitingForBinder) {
 295                     mRequestWaitingForBinder = false;
 296                     Log_OC.d(TAG, "Simulating reselection of current page after connection " +
 297                             "of download binder");
 298                     onPageSelected(mViewPager.getCurrentItem());
 299                 }
 300
 301             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 302                     FileUploader.class))) {
 303                 Log_OC.d(TAG, "Upload service connected");
 304                 mUploaderBinder = (FileUploaderBinder) service;
 305             } else {
 306                 return;
 307             }
 308
 309         }
 310
 311         @Override
 312         public void onServiceDisconnected(ComponentName component) {
 313             if (component.equals(new ComponentName(PreviewImageActivity.this,
 314                     FileDownloader.class))) {
 315                 Log_OC.d(TAG, "Download service suddenly disconnected");
 316                 mDownloaderBinder = null;
 317             } else if (component.equals(new ComponentName(PreviewImageActivity.this,
 318                     FileUploader.class))) {
 319                 Log_OC.d(TAG, "Upload service suddenly disconnected");
 320                 mUploaderBinder = null;
 321             }
 322         }
 323     };
 324
 325
 326     @Override
 327     public void onStop() {
 328         super.onStop();
 329     }
 330
 331
 332     @Override
 333     public void onDestroy() {
 334         super.onDestroy();
 335     }
 336
 337     @Override
 338     public boolean onOptionsItemSelected(MenuItem item) {
 339         boolean returnValue = false;
 340
 341         switch(item.getItemId()){
 342         case android.R.id.home:
 343             if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
 344                 mDrawerLayout.closeDrawer(GravityCompat.START);
 345             } else {
 346                 backToDisplayActivity();
 347             }
 348             returnValue = true;
 349             break;
 350         default:
 351                 returnValue = super.onOptionsItemSelected(item);
 352         }
 353
 354         return returnValue;
 355     }
 356
 357
 358     @Override
 359     protected void onResume() {
 360         super.onResume();
 361
 362         mDownloadFinishReceiver = new DownloadFinishReceiver();
 363
 364         IntentFilter filter = new IntentFilter(FileDownloader.getDownloadFinishMessage());
 365         filter.addAction(FileDownloader.getDownloadAddedMessage());
 366         registerReceiver(mDownloadFinishReceiver, filter);
 367     }
 368
 369     @Override
 370     protected void onPostResume() {
 371         super.onPostResume();
 372     }
 373
 374     @Override
 375     public void onPause() {
 376         if (mDownloadFinishReceiver != null){
 377             unregisterReceiver(mDownloadFinishReceiver);
 378             mDownloadFinishReceiver = null;
 379         }
 380
 381         super.onPause();
 382     }
 383
 384
 385     private void backToDisplayActivity() {
 386         finish();
 387     }
 388
 389     @Override
 390     public void showDetails(OCFile file) {
 391         Intent showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 392         showDetailsIntent.setAction(FileDisplayActivity.ACTION_DETAILS);
 393         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, file);
 394         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT,
 395                 AccountUtils.getCurrentOwnCloudAccount(this));
 396         startActivity(showDetailsIntent);
 397         int pos = mPreviewImagePagerAdapter.getFilePosition(file);
 398         file = mPreviewImagePagerAdapter.getFileAt(pos);
 399
 400     }
 401
 402     /**
 403      * Shows the share view for sharing  {@link OCFile} received as a
 404      * parameter in the second fragment.
 405      *
 406      * @param file {@link OCFile}  File to share with
 407      */
 408     @Override
 409     public void showShareFile(OCFile file) {
 410         ShareFileDialogFragment dialog =
 411                 ShareFileDialogFragment.newInstance(file, getAccount());
 412         dialog.show(getSupportFragmentManager(), DIALOG_SHARE_FILE);
 413     }
 414     private void requestForDownload(OCFile file) {
 415         if (mDownloaderBinder == null) {
 416             Log_OC.d(TAG, "requestForDownload called without binder to download service");
 417
 418         } else if (!mDownloaderBinder.isDownloading(getAccount(), file)) {
 419             Intent i = new Intent(this, FileDownloader.class);
 420             i.putExtra(FileDownloader.EXTRA_ACCOUNT, getAccount());
 421             i.putExtra(FileDownloader.EXTRA_FILE, file);
 422             startService(i);
 423         }
 424     }
 425
 426     /**
 427      * This method will be invoked when a new page becomes selected. Animation is not necessarily
 428      * complete.
 429      *
 430      *  @param  position        Position index of the new selected page
 431      */
 432     @Override
 433     public void onPageSelected(int position) {
 434         mSavedPosition = position;
 435         mHasSavedPosition = true;
 436         if (mDownloaderBinder == null) {
 437             mRequestWaitingForBinder = true;
 438
 439         } else {
 440             OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 441             getSupportActionBar().setTitle(currentFile.getFileName());
 442             mDrawerToggle.setDrawerIndicatorEnabled(false);
 443             if (!currentFile.isDown()) {
 444                 if (!mPreviewImagePagerAdapter.pendingErrorAt(position)) {
 445                     requestForDownload(currentFile);
 446                 }
 447             }
 448
 449             // Call to reset image zoom to initial state
 450             ((PreviewImagePagerAdapter) mViewPager.getAdapter()).resetZoom();
 451         }
 452
 453     }
 454
 455     /**
 456      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 457      * when the pager is automatically settling to the current page. when it is fully stopped/idle.
 458      *
 459      * @param   state       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 460      */
 461     @Override
 462     public void onPageScrollStateChanged(int state) {
 463     }
 464
 465     /**
 466      * This method will be invoked when the current page is scrolled, either as part of a
 467      * programmatically initiated smooth scroll or a user initiated touch scroll.
 468      *
 469      * @param   position                Position index of the first page currently being displayed.
 470      *                                  Page position+1 will be visible if positionOffset is
 471      *                                  nonzero.
 472      *
 473      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
 474      *                                  at position.
 475      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 476      */
 477     @Override
 478     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 479     }
 480
 481
 482     /**
 483      * Class waiting for broadcast events from the {@link FileDownloader} service.
 484      *
 485      * Updates the UI when a download is started or finished, provided that it is relevant for the
 486      * folder displayed in the gallery.
 487      */
 488     private class DownloadFinishReceiver extends BroadcastReceiver {
 489         @Override
 490         public void onReceive(Context context, Intent intent) {
 491             String accountName = intent.getStringExtra(FileDownloader.ACCOUNT_NAME);
 492             String downloadedRemotePath = intent.getStringExtra(FileDownloader.EXTRA_REMOTE_PATH);
 493             if (getAccount().name.equals(accountName) &&
 494                     downloadedRemotePath != null) {
 495
 496                 OCFile file = getStorageManager().getFileByPath(downloadedRemotePath);
 497                 int position = mPreviewImagePagerAdapter.getFilePosition(file);
 498                 boolean downloadWasFine = intent.getBooleanExtra(
 499                         FileDownloader.EXTRA_DOWNLOAD_RESULT, false);
 500                 //boolean isOffscreen =  Math.abs((mViewPager.getCurrentItem() - position))
 501                 // <= mViewPager.getOffscreenPageLimit();
 502
 503                 if (position >= 0 &&
 504                         intent.getAction().equals(FileDownloader.getDownloadFinishMessage())) {
 505                     if (downloadWasFine) {
 506                         mPreviewImagePagerAdapter.updateFile(position, file);
 507
 508                     } else {
 509                         mPreviewImagePagerAdapter.updateWithDownloadError(position);
 510                     }
 511                     mPreviewImagePagerAdapter.notifyDataSetChanged();   // will trigger the creation
 512                                                                         // of new fragments
 513
 514                 } else {
 515                     Log_OC.d(TAG, "Download finished, but the fragment is offscreen");
 516                 }
 517
 518             }
 519             removeStickyBroadcast(intent);
 520         }
 521
 522     }
 523
 524     @SuppressLint("InlinedApi")
 525         public void toggleFullScreen() {
 526
 527         if (isHoneycombOrHigher()) {
 528
 529             boolean visible = (mFullScreenAnchorView.getSystemUiVisibility()
 530                     & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0;
 531
 532             if (visible) {
 533                 hideSystemUI(mFullScreenAnchorView);
 534                 // actionBar.hide(); // propagated through
 535                 // OnSystemUiVisibilityChangeListener()
 536             } else {
 537                 showSystemUI(mFullScreenAnchorView);
 538                 // actionBar.show(); // propagated through
 539                 // OnSystemUiVisibilityChangeListener()
 540             }
 541
 542         } else {
 543
 544             ActionBar actionBar = getSupportActionBar();
 545             if (!actionBar.isShowing()) {
 546                 actionBar.show();
 547                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 548
 549             } else {
 550                 actionBar.hide();
 551                 mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 552
 553             }
 554
 555         }
 556     }
 557
 558     @Override
 559     protected void onAccountSet(boolean stateWasRecovered) {
 560         super.onAccountSet(stateWasRecovered);
 561         if (getAccount() != null) {
 562             OCFile file = getFile();
 563             /// Validate handled file  (first image to preview)
 564             if (file == null) {
 565                 throw new IllegalStateException("Instanced with a NULL OCFile");
 566             }
 567             if (!file.isImage()) {
 568                 throw new IllegalArgumentException("Non-image file passed as argument");
 569             }
 570
 571             // Update file according to DB file, if it is possible
 572             if (file.getFileId() > FileDataStorageManager.ROOT_PARENT_ID)
 573                 file = getStorageManager().getFileById(file.getFileId());
 574
 575             if (file != null) {
 576                 /// Refresh the activity according to the Account and OCFile set
 577                 setFile(file);  // reset after getting it fresh from storageManager
 578                 getSupportActionBar().setTitle(getFile().getFileName());
 579                 //if (!stateWasRecovered) {
 580                     initViewPager();
 581                 //}
 582
 583             } else {
 584                 // handled file not in the current Account
 585                 finish();
 586             }
 587         }
 588     }
 589
 590     @Override
 591     public void onBrowsedDownTo(OCFile folder) {
 592         // TODO Auto-generated method stub
 593
 594     }
 595
 596     @Override
 597     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
 598         // TODO Auto-generated method stub
 599
 600     }
 601
 602
 603     @SuppressLint("InlinedApi")
 604         private void hideSystemUI(View anchorView) {
 605         anchorView.setSystemUiVisibility(
 606                 View.SYSTEM_UI_FLAG_HIDE_NAVIGATION         // hides NAVIGATION BAR; Android >= 4.0
 607             |   View.SYSTEM_UI_FLAG_FULLSCREEN              // hides STATUS BAR;     Android >= 4.1
 608             |   View.SYSTEM_UI_FLAG_IMMERSIVE               // stays interactive;    Android >= 4.4
 609             |   View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 610             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 611             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 612         );
 613     }
 614
 615     @SuppressLint("InlinedApi")
 616     private void showSystemUI(View anchorView) {
 617         anchorView.setSystemUiVisibility(
 618                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE           // draw full window;     Android >= 4.1
 619             |   View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       // draw full window;     Android >= 4.1
 620             |   View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  // draw full window;     Android >= 4.1
 621         );
 622     }
 623
 624     /**
 625      * Checks if OS version is Honeycomb one or higher
 626      *
 627      * @return boolean
 628      */
 629     private boolean isHoneycombOrHigher() {
 630         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
 631             return true;
 632         }
 633         return false;
 634     }
 635
 636     @Override
 637     public void allFilesOption(){
 638         backToDisplayActivity();
 639         super.allFilesOption();
 640     }
 641 }