gt:         if (!result.isSuccess() && (
context: /**
   *   ownCloud Android client application
   *
   *   @author David A. Velasco
   *   Copyright (C) 2011  Bartek Przybylski
   *   Copyright (C) 2015 ownCloud Inc.
   *
   *   This program is free software: you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License version 2,
   *   as published by the Free Software Foundation.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   */
  
  package com.owncloud.android.ui.activity;
  
  import android.accounts.Account;
  import android.accounts.AccountManager;
  import android.accounts.AccountManagerCallback;
  import android.accounts.AccountManagerFuture;
  import android.accounts.AuthenticatorException;
  import android.accounts.OperationCanceledException;
  import android.content.ComponentName;
  import android.content.Context;
  import android.content.Intent;
  import android.content.ServiceConnection;
  import android.content.res.Configuration;
  import android.os.Bundle;
  import android.os.Handler;
  import android.os.IBinder;
  import android.support.v4.app.ActionBarDrawerToggle;
  import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentManager;
  import android.support.v4.app.FragmentTransaction;
  import android.support.v4.view.GravityCompat;
  import android.support.v4.widget.DrawerLayout;
  import android.support.v7.app.ActionBar;
  import android.support.v7.app.ActionBarActivity;
  import android.view.View;
  import android.widget.AdapterView;
  import android.widget.LinearLayout;
  import android.widget.ListView;
  import android.widget.Toast;
  
  import com.owncloud.android.BuildConfig;
  import com.owncloud.android.MainApp;
  import com.owncloud.android.R;
  import com.owncloud.android.authentication.AccountUtils;
  import com.owncloud.android.authentication.AuthenticatorActivity;
  import com.owncloud.android.datamodel.FileDataStorageManager;
  import com.owncloud.android.datamodel.OCFile;
  import com.owncloud.android.files.FileOperationsHelper;
  import com.owncloud.android.files.services.FileDownloader;
  import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  import com.owncloud.android.files.services.FileUploader;
  import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  import com.owncloud.android.lib.common.operations.RemoteOperation;
  import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  import com.owncloud.android.lib.common.utils.Log_OC;
  import com.owncloud.android.operations.CreateShareOperation;
  import com.owncloud.android.operations.SynchronizeFolderOperation;
  import com.owncloud.android.operations.UnshareLinkOperation;
  import com.owncloud.android.services.OperationsService;
  import com.owncloud.android.services.OperationsService.OperationsServiceBinder;
  import com.owncloud.android.ui.NavigationDrawerItem;
  import com.owncloud.android.ui.adapter.NavigationDrawerListAdapter;
  import com.owncloud.android.ui.dialog.LoadingDialog;
  import com.owncloud.android.ui.dialog.SharePasswordDialogFragment;
  import com.owncloud.android.utils.ErrorMessageAdapter;
  
  import java.util.ArrayList;
  
  
  /**
   * Activity with common behaviour for activities handling {@link OCFile}s in ownCloud
   * {@link Account}s .
   */
  public class FileActivity extends ActionBarActivity
          implements OnRemoteOperationListener, ComponentsGetter {
  
      public static final String EXTRA_FILE = "com.owncloud.android.ui.activity.FILE";
      public static final String EXTRA_ACCOUNT = "com.owncloud.android.ui.activity.ACCOUNT";
      public static final String EXTRA_WAITING_TO_PREVIEW =
              "com.owncloud.android.ui.activity.WAITING_TO_PREVIEW";
      public static final String EXTRA_FROM_NOTIFICATION =
              "com.owncloud.android.ui.activity.FROM_NOTIFICATION";
      
      public static final String TAG = FileActivity.class.getSimpleName();
      
      private static final String DIALOG_WAIT_TAG = "DIALOG_WAIT";
      private static final String KEY_WAITING_FOR_OP_ID = "WAITING_FOR_OP_ID";
      private static final String DIALOG_SHARE_PASSWORD = "DIALOG_SHARE_PASSWORD";
      private static final String KEY_TRY_SHARE_AGAIN = "TRY_SHARE_AGAIN";
      private static final String KEY_ACTION_BAR_TITLE = "ACTION_BAR_TITLE";
      
      protected static final long DELAY_TO_REQUEST_OPERATION_ON_ACTIVITY_RESULTS = 200;
      
      
      /** OwnCloud {@link Account} where the main {@link OCFile} handled by the activity is located.*/
      private Account mAccount;
      
      /** Main {@link OCFile} handled by the activity.*/
      private OCFile mFile;
      
      /** Flag to signal that the activity will is finishing to enforce the creation of an ownCloud
       * {@link Account} */
      private boolean mRedirectingToSetupAccount = false;
      
      /** Flag to signal when the value of mAccount was set */ 
      protected boolean mAccountWasSet;
      
      /** Flag to signal when the value of mAccount was restored from a saved state */ 
      protected boolean mAccountWasRestored;
      
      /** Flag to signal if the activity is launched by a notification */
      private boolean mFromNotification;
      
      /** Messages handler associated to the main thread and the life cycle of the activity */
      private Handler mHandler;
      
      /** Access point to the cached database for the current ownCloud {@link Account} */
      private FileDataStorageManager mStorageManager = null;
      
      private FileOperationsHelper mFileOperationsHelper;
      
      private ServiceConnection mOperationsServiceConnection = null;
      
      private OperationsServiceBinder mOperationsServiceBinder = null;
      
      protected FileDownloaderBinder mDownloaderBinder = null;
      protected FileUploaderBinder mUploaderBinder = null;
      private ServiceConnection mDownloadServiceConnection, mUploadServiceConnection = null;
  
      private boolean mTryShareAgain = false;
  
      // Navigation Drawer
      protected DrawerLayout mDrawerLayout;
      protected ActionBarDrawerToggle mDrawerToggle;
      protected ListView mDrawerList;
  
      // Slide menu items
      protected String[] mDrawerTitles;
      protected String[] mDrawerContentDescriptions;
  
      protected ArrayList<NavigationDrawerItem> mDrawerItems;
  
      protected NavigationDrawerListAdapter mNavigationDrawerAdapter = null;
  
  
      // TODO re-enable when "Accounts" is available in Navigation Drawer
  //    protected boolean mShowAccounts = false;
      
      /**
       * Loads the ownCloud {@link Account} and main {@link OCFile} to be handled by the instance of 
       * the {@link FileActivity}.
       * 
       * Grants that a valid ownCloud {@link Account} is associated to the instance, or that the user 
       * is requested to create a new one.
       */
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          mHandler = new Handler();
          mFileOperationsHelper = new FileOperationsHelper(this);
          Account account = null;
          if(savedInstanceState != null) {
              mFile = savedInstanceState.getParcelable(FileActivity.EXTRA_FILE);
              mFromNotification = savedInstanceState.getBoolean(FileActivity.EXTRA_FROM_NOTIFICATION);
              mFileOperationsHelper.setOpIdWaitingFor(
                      savedInstanceState.getLong(KEY_WAITING_FOR_OP_ID, Long.MAX_VALUE)
                      );
              mTryShareAgain = savedInstanceState.getBoolean(KEY_TRY_SHARE_AGAIN);
              getSupportActionBar().setTitle(savedInstanceState.getString(KEY_ACTION_BAR_TITLE));
          } else {
              account = getIntent().getParcelableExtra(FileActivity.EXTRA_ACCOUNT);
              mFile = getIntent().getParcelableExtra(FileActivity.EXTRA_FILE);
              mFromNotification = getIntent().getBooleanExtra(FileActivity.EXTRA_FROM_NOTIFICATION,
                      false);
          }
  
          AccountUtils.updateAccountVersion(this); // best place, before any access to AccountManager
                                                   // or database
  
          setAccount(account, savedInstanceState != null);
          
          mOperationsServiceConnection = new OperationsServiceConnection();
          bindService(new Intent(this, OperationsService.class), mOperationsServiceConnection,
                  Context.BIND_AUTO_CREATE);
          
          mDownloadServiceConnection = newTransferenceServiceConnection();
          if (mDownloadServiceConnection != null) {
              bindService(new Intent(this, FileDownloader.class), mDownloadServiceConnection,
                      Context.BIND_AUTO_CREATE);
          }
          mUploadServiceConnection = newTransferenceServiceConnection();
          if (mUploadServiceConnection != null) {
              bindService(new Intent(this, FileUploader.class), mUploadServiceConnection,
                      Context.BIND_AUTO_CREATE);
          }
  
      }
  
      @Override
      protected void onNewIntent (Intent intent) {
          Log_OC.v(TAG, "onNewIntent() start");
          Account current = AccountUtils.getCurrentOwnCloudAccount(this);
          if (current != null && mAccount != null && !mAccount.name.equals(current.name)) {
              mAccount = current;
          }
          Log_OC.v(TAG, "onNewIntent() stop");
      }
  
      /**
       *  Since ownCloud {@link Account}s can be managed from the system setting menu, 
       *  the existence of the {@link Account} associated to the instance must be checked 
       *  every time it is restarted.
       */
      @Override
      protected void onRestart() {
          Log_OC.v(TAG, "onRestart() start");
          super.onRestart();
          boolean validAccount = (mAccount != null && AccountUtils.exists(mAccount, this));
          if (!validAccount) {
              swapToDefaultAccount();
          }
          Log_OC.v(TAG, "onRestart() end");
      }
  
      
      @Override 
      protected void onStart() {
          super.onStart();
  
          if (mAccountWasSet) {
              onAccountSet(mAccountWasRestored);
          }
      }
      
      @Override
      protected void onResume() {
          super.onResume();
          
          if (mOperationsServiceBinder != null) {
              doOnResumeAndBound();
          }
      }
      
      @Override
      protected void onPause()  {
          if (mOperationsServiceBinder != null) {
              mOperationsServiceBinder.removeOperationListener(this);
          }
          
          super.onPause();
      }
      
      
      @Override
      protected void onDestroy() {
          if (mOperationsServiceConnection != null) {
              unbindService(mOperationsServiceConnection);
              mOperationsServiceBinder = null;
          }
          if (mDownloadServiceConnection != null) {
              unbindService(mDownloadServiceConnection);
              mDownloadServiceConnection = null;
          }
          if (mUploadServiceConnection != null) {
              unbindService(mUploadServiceConnection);
              mUploadServiceConnection = null;
          }
  
          super.onDestroy();
      }
  
      @Override
      protected void onPostCreate(Bundle savedInstanceState) {
          super.onPostCreate(savedInstanceState);
          // Sync the toggle state after onRestoreInstanceState has occurred.
          if (mDrawerToggle != null) {
              mDrawerToggle.syncState();
              if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
                  getSupportActionBar().setTitle(R.string.app_name);
                  mDrawerToggle.setDrawerIndicatorEnabled(true);
              }
          }
      }
  
      @Override
      public void onConfigurationChanged(Configuration newConfig) {
          super.onConfigurationChanged(newConfig);
          if (mDrawerToggle != null) {
              mDrawerToggle.onConfigurationChanged(newConfig);
          }
      }
  
      protected void initDrawer(){
          // constant settings for action bar when navigation drawer is inited
          getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
  
  
          mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
          // Notification Drawer
          LinearLayout navigationDrawerLayout = (LinearLayout) findViewById(R.id.left_drawer);
          mDrawerList = (ListView) navigationDrawerLayout.findViewById(R.id.drawer_list);
  
          // TODO re-enable when "Accounts" is available in Navigation Drawer
  //        // load Account in the Drawer Title
  //        // User-Icon
  //        ImageView userIcon = (ImageView) navigationDrawerLayout.findViewById(R.id.drawer_userIcon);
  //        userIcon.setImageResource(DisplayUtils.getSeasonalIconId());
  //
  //        // Username
  //        TextView username = (TextView) navigationDrawerLayout.findViewById(R.id.drawer_username);
  //        Account account = AccountUtils.getCurrentOwnCloudAccount(getApplicationContext());
  //
  //        if (account != null) {
  //            int lastAtPos = account.name.lastIndexOf("@");
  //            username.setText(account.name.substring(0, lastAtPos));
  //        }
  
          // load slide menu items
          mDrawerTitles = getResources().getStringArray(R.array.drawer_items);
  
          // nav drawer content description from resources
          mDrawerContentDescriptions = getResources().
                  getStringArray(R.array.drawer_content_descriptions);
  
          // nav drawer items
          mDrawerItems = new ArrayList<NavigationDrawerItem>();
          // adding nav drawer items to array
          // TODO re-enable when "Accounts" is available in Navigation Drawer
          // Accounts
          // mDrawerItems.add(new NavigationDrawerItem(mDrawerTitles[0],
          // mDrawerContentDescriptions[0]));
          // All Files
          mDrawerItems.add(new NavigationDrawerItem(mDrawerTitles[0], mDrawerContentDescriptions[0]));
  
          // TODO Enable when "On Device" is recovered
          // On Device
          //mDrawerItems.add(new NavigationDrawerItem(mDrawerTitles[2],
          //        mDrawerContentDescriptions[2]));
  
          // Settings
          mDrawerItems.add(new NavigationDrawerItem(mDrawerTitles[1], mDrawerContentDescriptions[1]));
          // Logs
          if (BuildConfig.DEBUG) {
              mDrawerItems.add(new NavigationDrawerItem(mDrawerTitles[2],
                      mDrawerContentDescriptions[2]));
          }
  
          // setting the nav drawer list adapter
          mNavigationDrawerAdapter = new NavigationDrawerListAdapter(getApplicationContext(), this,
                  mDrawerItems);
          mDrawerList.setAdapter(mNavigationDrawerAdapter);
  
          mDrawerToggle = new ActionBarDrawerToggle(
                  this,
                  mDrawerLayout,
                  R.drawable.ic_drawer,
                  R.string.app_name,
                  R.string.drawer_close) {
  
              /** Called when a drawer has settled in a completely closed state. */
              public void onDrawerClosed(View view) {
                  super.onDrawerClosed(view);
                  updateActionBarTitleAndHomeButton(null);
                  invalidateOptionsMenu();
              }
  
              /** Called when a drawer has settled in a completely open state. */
              public void onDrawerOpened(View drawerView) {
                  super.onDrawerOpened(drawerView);
                  getSupportActionBar().setTitle(R.string.app_name);
                  mDrawerToggle.setDrawerIndicatorEnabled(true);
                  invalidateOptionsMenu();
              }
          };
  
          //mDrawerToggle.setDrawerIndicatorEnabled(true);
          // Set the list's click listener
          mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
  
          // Set the drawer toggle as the DrawerListener
          mDrawerLayout.setDrawerListener(mDrawerToggle);
      }
  
      /**
       * Updates title bar and home buttons (state and icon).
       *
       * Assumes that navigation drawer is NOT visible.
       */
      protected void updateActionBarTitleAndHomeButton(OCFile chosenFile) {
          String title = getString(R.string.default_display_name_for_root_folder);    // default
          boolean inRoot;
  
          /// choose the appropiate title
          if (chosenFile == null) {
              chosenFile = mFile;     // if no file is passed, current file decides
          }
          inRoot = (
                  chosenFile == null ||
                  (chosenFile.isFolder() && chosenFile.getParentId() == FileDataStorageManager.ROOT_PARENT_ID)
          );
          if (!inRoot) {
              title = chosenFile.getFileName();
          }
  
          /// set the chosen title
          ActionBar actionBar = getSupportActionBar();
          actionBar.setTitle(title);
          /// also as content description
          View actionBarTitleView = getWindow().getDecorView().findViewById(
                  getResources().getIdentifier("action_bar_title", "id", "android")
          );
          if (actionBarTitleView != null) {    // it's null in Android 2.x
              actionBarTitleView.setContentDescription(title);
          }
  
          /// set home button properties
          mDrawerToggle.setDrawerIndicatorEnabled(inRoot);
          actionBar.setDisplayHomeAsUpEnabled(true);
          actionBar.setDisplayShowTitleEnabled(true);
  
      }
  
  
      /**
       *  Sets and validates the ownCloud {@link Account} associated to the Activity. 
       * 
       *  If not valid, tries to swap it for other valid and existing ownCloud {@link Account}.
       *  
       *  POSTCONDITION: updates {@link #mAccountWasSet} and {@link #mAccountWasRestored}. 
       * 
       *  @param account          New {@link Account} to set.
       *  @param savedAccount     When 'true', account was retrieved from a saved instance state.
       */
      protected void setAccount(Account account, boolean savedAccount) {
          Account oldAccount = mAccount;
          boolean validAccount =
                  (account != null && AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(),
                          account.name));
          if (validAccount) {
              mAccount = account;
              mAccountWasSet = true;
              mAccountWasRestored = (savedAccount || mAccount.equals(oldAccount));
              
          } else {
              swapToDefaultAccount();
          }
      }
  
      
      /**
       *  Tries to swap the current ownCloud {@link Account} for other valid and existing. 
       * 
       *  If no valid ownCloud {@link Account} exists, the the user is requested 
       *  to create a new ownCloud {@link Account}.
       *  
       *  POSTCONDITION: updates {@link #mAccountWasSet} and {@link #mAccountWasRestored}.
       */
      private void swapToDefaultAccount() {
          // default to the most recently used account
          Account newAccount  = AccountUtils.getCurrentOwnCloudAccount(getApplicationContext());
          if (newAccount == null) {
              /// no account available: force account creation
              createFirstAccount();
              mRedirectingToSetupAccount = true;
              mAccountWasSet = false;
              mAccountWasRestored = false;
              
          } else {
              mAccountWasSet = true;
              mAccountWasRestored = (newAccount.equals(mAccount));
              mAccount = newAccount;
          }
      }
  
  
      /**
       * Launches the account creation activity. To use when no ownCloud account is available
       */
      private void createFirstAccount() {
          AccountManager am = AccountManager.get(getApplicationContext());
          am.addAccount(MainApp.getAccountType(),
                  null,
                  null,
                  null,
                  this,
                  new AccountCreationCallback(),
                  null);
      }
  
      
      /**
       * {@inheritDoc}
       */
      @Override
      protected void onSaveInstanceState(Bundle outState) {
          super.onSaveInstanceState(outState);
          outState.putParcelable(FileActivity.EXTRA_FILE, mFile);
          outState.putBoolean(FileActivity.EXTRA_FROM_NOTIFICATION, mFromNotification);
          outState.putLong(KEY_WAITING_FOR_OP_ID, mFileOperationsHelper.getOpIdWaitingFor());
          outState.putBoolean(KEY_TRY_SHARE_AGAIN, mTryShareAgain);
          outState.putString(KEY_ACTION_BAR_TITLE, getSupportActionBar().getTitle().toString());
      }
      
      
      /**
       * Getter for the main {@link OCFile} handled by the activity.
       * 
       * @return  Main {@link OCFile} handled by the activity.
       */
      public OCFile getFile() {
          return mFile;
      }
  
      
      /**
       * Setter for the main {@link OCFile} handled by the activity.
       * 
       * @param file  Main {@link OCFile} to be handled by the activity.
       */
      public void setFile(OCFile file) {
          mFile = file;
      }
  
      
      /**
       * Getter for the ownCloud {@link Account} where the main {@link OCFile} handled by the activity
       * is located.
       * 
       * @return  OwnCloud {@link Account} where the main {@link OCFile} handled by the activity
       *          is located.
       */
      public Account getAccount() {
          return mAccount;
      }
  
      protected void setAccount(Account account) {
          mAccount = account;
      }
  
      /**
       * @return Value of mFromNotification: True if the Activity is launched by a notification
       */
      public boolean fromNotification() {
          return mFromNotification;
      }
      
      /**
       * @return  'True' when the Activity is finishing to enforce the setup of a new account.
       */
      protected boolean isRedirectingToSetupAccount() {
          return mRedirectingToSetupAccount;
      }
  
      public boolean isTryShareAgain(){
          return mTryShareAgain;
      }
  
      public void setTryShareAgain(boolean tryShareAgain) {
         mTryShareAgain = tryShareAgain;
      }
      
      public OperationsServiceBinder getOperationsServiceBinder() {
          return mOperationsServiceBinder;
      }
      
      protected ServiceConnection newTransferenceServiceConnection() {
          return null;
      }
  
      /**
       * Helper class handling a callback from the {@link AccountManager} after the creation of
       * a new ownCloud {@link Account} finished, successfully or not.
       * 
       * At this moment, only called after the creation of the first account.
       */
      public class AccountCreationCallback implements AccountManagerCallback<Bundle> {
  
          @Override
          public void run(AccountManagerFuture<Bundle> future) {
              FileActivity.this.mRedirectingToSetupAccount = false;
              boolean accountWasSet = false;
              if (future != null) {
                  try {
                      Bundle result;
                      result = future.getResult();
                      String name = result.getString(AccountManager.KEY_ACCOUNT_NAME);
                      String type = result.getString(AccountManager.KEY_ACCOUNT_TYPE);
                      if (AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), name)) {
                          setAccount(new Account(name, type), false);
                          accountWasSet = true;
                      }
                  } catch (OperationCanceledException e) {
                      Log_OC.d(TAG, "Account creation canceled");
                      
                  } catch (Exception e) {
                      Log_OC.e(TAG, "Account creation finished in exception: ", e);
                  }
                      
              } else {
                  Log_OC.e(TAG, "Account creation callback with null bundle");
              }
              if (!accountWasSet) {
                  moveTaskToBack(true);
              }
          }
          
      }
      
      
      /**
       *  Called when the ownCloud {@link Account} associated to the Activity was just updated.
       * 
       *  Child classes must grant that state depending on the {@link Account} is updated.
       */
      protected void onAccountSet(boolean stateWasRecovered) {
          if (getAccount() != null) {
              mStorageManager = new FileDataStorageManager(getAccount(), getContentResolver());
              
          } else {
              Log_OC.wtf(TAG, "onAccountChanged was called with NULL account associated!");
          }
      }
  
  
      public FileDataStorageManager getStorageManager() {
          return mStorageManager;
      }
  
  
      public OnRemoteOperationListener getRemoteOperationListener() {
          return this;
      }
  
  
      public Handler getHandler() {
          return mHandler;
      }
      
      public FileOperationsHelper getFileOperationsHelper() {
          return mFileOperationsHelper;
      }
      
      /**
       * 
       * @param operation     Removal operation performed.
       * @param result        Result of the removal.
       */
      @Override
      public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
          Log_OC.d(TAG, "Received result of operation in FileActivity - common behaviour for all the "
                  + "FileActivities ");
          
          mFileOperationsHelper.setOpIdWaitingFor(Long.MAX_VALUE);
          
  