src/com/owncloud/android/ui/activity/Uploader.java

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author Bartek Przybylski
   5  *   Copyright (C) 2012  Bartek Przybylski
   6  *   Copyright (C) 2015 ownCloud Inc.
   7  *
   8  *   This program is free software: you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License version 2,
  10  *   as published by the Free Software Foundation.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 package com.owncloud.android.ui.activity;
  23
  24 import java.io.File;
  25 import java.util.ArrayList;
  26 import java.util.HashMap;
  27 import java.util.LinkedList;
  28 import java.util.List;
  29 import java.util.Stack;
  30 import java.util.Vector;
  31
  32 import android.accounts.Account;
  33 import android.accounts.AccountManager;
  34 import android.app.AlertDialog;
  35 import android.app.AlertDialog.Builder;
  36 import android.app.Dialog;
  37 import android.app.ProgressDialog;
  38 import android.content.Context;
  39 import android.content.DialogInterface;
  40 import android.content.DialogInterface.OnCancelListener;
  41 import android.content.DialogInterface.OnClickListener;
  42 import android.content.Intent;
  43 import android.content.SharedPreferences;
  44 import android.content.res.Resources.NotFoundException;
  45 import android.database.Cursor;
  46 import android.net.Uri;
  47 import android.os.Bundle;
  48 import android.os.Parcelable;
  49 import android.preference.PreferenceManager;
  50 import android.provider.MediaStore.Audio;
  51 import android.provider.MediaStore.Images;
  52 import android.provider.MediaStore.Video;
  53 import android.view.View;
  54 import android.widget.AdapterView;
  55 import android.widget.AdapterView.OnItemClickListener;
  56 import android.widget.Button;
  57 import android.widget.EditText;
  58 import android.widget.ListView;
  59 import android.widget.SimpleAdapter;
  60 import android.widget.Toast;
  61
  62 import com.actionbarsherlock.app.ActionBar;
  63 import com.actionbarsherlock.view.MenuItem;
  64 import com.owncloud.android.MainApp;
  65 import com.owncloud.android.R;
  66 import com.owncloud.android.authentication.AccountAuthenticator;
  67 import com.owncloud.android.datamodel.FileDataStorageManager;
  68 import com.owncloud.android.datamodel.OCFile;
  69 import com.owncloud.android.files.services.FileUploader;
  70 import com.owncloud.android.lib.common.operations.RemoteOperation;
  71 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  72 import com.owncloud.android.lib.common.utils.Log_OC;
  73 import com.owncloud.android.operations.CreateFolderOperation;
  74 import com.owncloud.android.ui.dialog.CreateFolderDialogFragment;
  75 import com.owncloud.android.utils.DisplayUtils;
  76 import com.owncloud.android.utils.ErrorMessageAdapter;
  77
  78
  79 /**
  80  * This can be used to upload things to an ownCloud instance.
  81  */
  82 public class Uploader extends FileActivity
  83         implements OnItemClickListener, android.view.View.OnClickListener {
  84
  85     private static final String TAG = Uploader.class.getSimpleName();
  86
  87     private Account mAccount;
  88     private AccountManager mAccountManager;
  89     private Stack<String> mParents;
  90     private ArrayList<Parcelable> mStreamsToUpload;
  91     private boolean mCreateDir;
  92     private String mUploadPath;
  93     private FileDataStorageManager mStorageManager;
  94     private OCFile mFile;
  95     private boolean mAccountSelected = false;
  96
  97     private final static int DIALOG_NO_ACCOUNT = 0;
  98     private final static int DIALOG_WAITING = 1;
  99     private final static int DIALOG_NO_STREAM = 2;
 100     private final static int DIALOG_MULTIPLE_ACCOUNT = 3;
 101
 102     private final static int REQUEST_CODE_SETUP_ACCOUNT = 0;
 103
 104     private final static String KEY_PARENTS = "PARENTS";
 105     private final static String KEY_ACCOUNT = "ACCOUNT";
 106     private final static String KEY_FILE = "FILE";
 107     private final static String KEY_ACCOUNT_SELECTED = "ACCOUNT_SELECTED";
 108
 109     @Override
 110     protected void onCreate(Bundle savedInstanceState) {
 111         super.onCreate(savedInstanceState);
 112
 113         if (savedInstanceState == null) {
 114             mParents = new Stack<String>();
 115         } else {
 116             mParents = (Stack<String>) savedInstanceState.getSerializable(KEY_PARENTS);
 117             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 118             mFile = savedInstanceState.getParcelable(KEY_FILE);
 119             mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 120             mAccountSelected = savedInstanceState.getBoolean(KEY_ACCOUNT_SELECTED);
 121         }
 122
 123         ActionBar actionBar = getSupportActionBar();
 124         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 125
 126         if (prepareStreamsToUpload()) {
 127             mAccountManager = (AccountManager) getSystemService(Context.ACCOUNT_SERVICE);
 128             Account[] accounts = mAccountManager.getAccountsByType(MainApp.getAccountType());
 129             if (accounts.length == 0) {
 130                 Log_OC.i(TAG, "No ownCloud account is available");
 131                 showDialog(DIALOG_NO_ACCOUNT);
 132             } else if (accounts.length > 1 && !mAccountSelected) {
 133                 Log_OC.i(TAG, "More than one ownCloud is available");
 134                 showDialog(DIALOG_MULTIPLE_ACCOUNT);
 135             } else {
 136                 mAccount = accounts[0];
 137                 mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 138                 initTargetFolder();
 139                 populateDirectoryList();
 140
 141             }
 142
 143         } else {
 144             showDialog(DIALOG_NO_STREAM);
 145         }
 146
 147     }
 148
 149     @Override
 150     protected void onSaveInstanceState(Bundle outState) {
 151          Log_OC.d(TAG, "onSaveInstanceState() start");
 152         super.onSaveInstanceState(outState);
 153         outState.putSerializable(KEY_PARENTS, mParents);
 154         outState.putParcelable(KEY_ACCOUNT, mAccount);
 155         outState.putParcelable(KEY_FILE, mFile);
 156         outState.putBoolean(KEY_ACCOUNT_SELECTED, mAccountSelected);
 157
 158         Log_OC.d(TAG, "onSaveInstanceState() end");
 159     }
 160
 161     @Override
 162     protected Dialog onCreateDialog(final int id) {
 163         final AlertDialog.Builder builder = new Builder(this);
 164         switch (id) {
 165         case DIALOG_WAITING:
 166             ProgressDialog pDialog = new ProgressDialog(this);
 167             pDialog.setIndeterminate(false);
 168             pDialog.setCancelable(false);
 169             pDialog.setMessage(getResources().getString(R.string.uploader_info_uploading));
 170             return pDialog;
 171         case DIALOG_NO_ACCOUNT:
 172             builder.setIcon(android.R.drawable.ic_dialog_alert);
 173             builder.setTitle(R.string.uploader_wrn_no_account_title);
 174             builder.setMessage(String.format(
 175                     getString(R.string.uploader_wrn_no_account_text), getString(R.string.app_name)));
 176             builder.setCancelable(false);
 177             builder.setPositiveButton(R.string.uploader_wrn_no_account_setup_btn_text, new OnClickListener() {
 178                 @Override
 179                 public void onClick(DialogInterface dialog, int which) {
 180                     if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.ECLAIR_MR1) {
 181                         // using string value since in API7 this
 182                         // constatn is not defined
 183                         // in API7 < this constatant is defined in
 184                         // Settings.ADD_ACCOUNT_SETTINGS
 185                         // and Settings.EXTRA_AUTHORITIES
 186                         Intent intent = new Intent(android.provider.Settings.ACTION_ADD_ACCOUNT);
 187                         intent.putExtra("authorities", new String[] { MainApp.getAuthTokenType() });
 188                         startActivityForResult(intent, REQUEST_CODE_SETUP_ACCOUNT);
 189                     } else {
 190                         // since in API7 there is no direct call for
 191                         // account setup, so we need to
 192                         // show our own AccountSetupAcricity, get
 193                         // desired results and setup
 194                         // everything for ourself
 195                         Intent intent = new Intent(getBaseContext(), AccountAuthenticator.class);
 196                         startActivityForResult(intent, REQUEST_CODE_SETUP_ACCOUNT);
 197                     }
 198                 }
 199             });
 200             builder.setNegativeButton(R.string.uploader_wrn_no_account_quit_btn_text, new OnClickListener() {
 201                 @Override
 202                 public void onClick(DialogInterface dialog, int which) {
 203                     finish();
 204                 }
 205             });
 206             return builder.create();
 207         case DIALOG_MULTIPLE_ACCOUNT:
 208             CharSequence ac[] = new CharSequence[
 209                     mAccountManager.getAccountsByType(MainApp.getAccountType()).length];
 210             for (int i = 0; i < ac.length; ++i) {
 211                 ac[i] = DisplayUtils.convertIdn(
 212                         mAccountManager.getAccountsByType(MainApp.getAccountType())[i].name, false);
 213             }
 214             builder.setTitle(R.string.common_choose_account);
 215             builder.setItems(ac, new OnClickListener() {
 216                 @Override
 217                 public void onClick(DialogInterface dialog, int which) {
 218                     mAccount = mAccountManager.getAccountsByType(MainApp.getAccountType())[which];
 219                     mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
 220                     initTargetFolder();
 221                     populateDirectoryList();
 222                     dialog.dismiss();
 223                     mAccountSelected = true;
 224                 }
 225             });
 226             builder.setCancelable(true);
 227             builder.setOnCancelListener(new OnCancelListener() {
 228                 @Override
 229                 public void onCancel(DialogInterface dialog) {
 230                     dialog.cancel();
 231                     finish();
 232                 }
 233             });
 234             return builder.create();
 235         case DIALOG_NO_STREAM:
 236             builder.setIcon(android.R.drawable.ic_dialog_alert);
 237             builder.setTitle(R.string.uploader_wrn_no_content_title);
 238             builder.setMessage(R.string.uploader_wrn_no_content_text);
 239             builder.setCancelable(false);
 240             builder.setNegativeButton(R.string.common_cancel, new OnClickListener() {
 241                 @Override
 242                 public void onClick(DialogInterface dialog, int which) {
 243                     finish();
 244                 }
 245             });
 246             return builder.create();
 247         default:
 248             throw new IllegalArgumentException("Unknown dialog id: " + id);
 249         }
 250     }
 251
 252     class a implements OnClickListener {
 253         String mPath;
 254         EditText mDirname;
 255
 256         public a(String path, EditText dirname) {
 257             mPath = path;
 258             mDirname = dirname;
 259         }
 260
 261         @Override
 262         public void onClick(DialogInterface dialog, int which) {
 263             Uploader.this.mUploadPath = mPath + mDirname.getText().toString();
 264             Uploader.this.mCreateDir = true;
 265             uploadFiles();
 266         }
 267     }
 268
 269     @Override
 270     public void onBackPressed() {
 271
 272         if (mParents.size() <= 1) {
 273             super.onBackPressed();
 274             return;
 275         } else {
 276             mParents.pop();
 277             populateDirectoryList();
 278         }
 279     }
 280
 281     @Override
 282     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 283         // click on folder in the list
 284         Log_OC.d(TAG, "on item click");
 285         Vector<OCFile> tmpfiles = mStorageManager.getFolderContent(mFile);
 286         if (tmpfiles.size() <= 0) return;
 287         // filter on dirtype
 288         Vector<OCFile> files = new Vector<OCFile>();
 289         for (OCFile f : tmpfiles)
 290             if (f.isFolder())
 291                 files.add(f);
 292         if (files.size() < position) {
 293             throw new IndexOutOfBoundsException("Incorrect item selected");
 294         }
 295         mParents.push(files.get(position).getFileName());
 296         populateDirectoryList();
 297     }
 298
 299     @Override
 300     public void onClick(View v) {
 301         // click on button
 302         switch (v.getId()) {
 303         case R.id.uploader_choose_folder:
 304             mUploadPath = "";   // first element in mParents is root dir, represented by ""; init mUploadPath with "/" results in a "//" prefix
 305             for (String p : mParents)
 306                 mUploadPath += p + OCFile.PATH_SEPARATOR;
 307             Log_OC.d(TAG, "Uploading file to dir " + mUploadPath);
 308
 309             uploadFiles();
 310
 311             break;
 312
 313         case R.id.uploader_new_folder:
 314             CreateFolderDialogFragment dialog = CreateFolderDialogFragment.newInstance(mFile);
 315             dialog.show(getSupportFragmentManager(), "createdirdialog");
 316             break;
 317
 318
 319         default:
 320             throw new IllegalArgumentException("Wrong element clicked");
 321         }
 322     }
 323
 324     @Override
 325     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 326         super.onActivityResult(requestCode, resultCode, data);
 327         Log_OC.i(TAG, "result received. req: " + requestCode + " res: " + resultCode);
 328         if (requestCode == REQUEST_CODE_SETUP_ACCOUNT) {
 329             dismissDialog(DIALOG_NO_ACCOUNT);
 330             if (resultCode == RESULT_CANCELED) {
 331                 finish();
 332             }
 333             Account[] accounts = mAccountManager.getAccountsByType(MainApp.getAuthTokenType());
 334             if (accounts.length == 0) {
 335                 showDialog(DIALOG_NO_ACCOUNT);
 336             } else {
 337                 // there is no need for checking for is there more then one
 338                 // account at this point
 339                 // since account setup can set only one account at time
 340                 mAccount = accounts[0];
 341                 populateDirectoryList();
 342             }
 343         }
 344     }
 345
 346     private void populateDirectoryList() {
 347         setContentView(R.layout.uploader_layout);
 348
 349         ListView mListView = (ListView) findViewById(android.R.id.list);
 350
 351         String current_dir = mParents.peek();
 352         if(current_dir.equals("")){
 353             getSupportActionBar().setTitle(getString(R.string.default_display_name_for_root_folder));
 354         }
 355         else{
 356             getSupportActionBar().setTitle(current_dir);
 357         }
 358         boolean notRoot = (mParents.size() > 1);
 359         ActionBar actionBar = getSupportActionBar();
 360         actionBar.setDisplayHomeAsUpEnabled(notRoot);
 361         actionBar.setHomeButtonEnabled(notRoot);
 362
 363         String full_path = generatePath(mParents);
 364
 365         Log_OC.d(TAG, "Populating view with content of : " + full_path);
 366
 367         mFile = mStorageManager.getFileByPath(full_path);
 368         if (mFile != null) {
 369             Vector<OCFile> files = mStorageManager.getFolderContent(mFile);
 370             List<HashMap<String, Object>> data = new LinkedList<HashMap<String,Object>>();
 371             for (OCFile f : files) {
 372                 HashMap<String, Object> h = new HashMap<String, Object>();
 373                 if (f.isFolder()) {
 374                     h.put("dirname", f.getFileName());
 375                     data.add(h);
 376                 }
 377             }
 378             SimpleAdapter sa = new SimpleAdapter(this,
 379                                                 data,
 380                                                 R.layout.uploader_list_item_layout,
 381                                                 new String[] {"dirname"},
 382                                                 new int[] {R.id.textView1});
 383
 384             mListView.setAdapter(sa);
 385             Button btnChooseFolder = (Button) findViewById(R.id.uploader_choose_folder);
 386             btnChooseFolder.setOnClickListener(this);
 387
 388             Button btnNewFolder = (Button) findViewById(R.id.uploader_new_folder);
 389             btnNewFolder.setOnClickListener(this);
 390
 391             mListView.setOnItemClickListener(this);
 392         }
 393     }
 394
 395     private String generatePath(Stack<String> dirs) {
 396         String full_path = "";
 397
 398         for (String a : dirs)
 399             full_path += a + "/";
 400         return full_path;
 401     }
 402
 403     private boolean prepareStreamsToUpload() {
 404         if (getIntent().getAction().equals(Intent.ACTION_SEND)) {
 405             mStreamsToUpload = new ArrayList<Parcelable>();
 406             mStreamsToUpload.add(getIntent().getParcelableExtra(Intent.EXTRA_STREAM));
 407         } else if (getIntent().getAction().equals(Intent.ACTION_SEND_MULTIPLE)) {
 408             mStreamsToUpload = getIntent().getParcelableArrayListExtra(Intent.EXTRA_STREAM);
 409         }
 410         return (mStreamsToUpload != null && mStreamsToUpload.get(0) != null);
 411     }
 412
 413     public void uploadFiles() {
 414         try {
 415
 416             ArrayList<String> local = new ArrayList<String>();
 417             ArrayList<String> remote = new ArrayList<String>();
 418
 419             // this checks the mimeType
 420             for (Parcelable mStream : mStreamsToUpload) {
 421
 422                 Uri uri = (Uri) mStream;
 423                 if (uri !=null) {
 424                     if (uri.getScheme().equals("content")) {
 425
 426                        String mimeType = getContentResolver().getType(uri);
 427
 428                        if (mimeType.contains("image")) {
 429                            String[] CONTENT_PROJECTION = { Images.Media.DATA,
 430                                    Images.Media.DISPLAY_NAME, Images.Media.MIME_TYPE,
 431                                    Images.Media.SIZE};
 432                            Cursor c = getContentResolver().query(uri, CONTENT_PROJECTION, null,
 433                                    null, null);
 434                            c.moveToFirst();
 435                            int index = c.getColumnIndex(Images.Media.DATA);
 436                            String data = c.getString(index);
 437                            local.add(data);
 438                            remote.add(mUploadPath +
 439                                    c.getString(c.getColumnIndex(Images.Media.DISPLAY_NAME)));
 440
 441                        }
 442                        else if (mimeType.contains("video")) {
 443                            String[] CONTENT_PROJECTION = { Video.Media.DATA,
 444                                    Video.Media.DISPLAY_NAME, Video.Media.MIME_TYPE,
 445                                    Video.Media.SIZE, Video.Media.DATE_MODIFIED };
 446                            Cursor c = getContentResolver().query(uri, CONTENT_PROJECTION, null,
 447                                    null, null);
 448                            c.moveToFirst();
 449                            int index = c.getColumnIndex(Video.Media.DATA);
 450                            String data = c.getString(index);
 451                            local.add(data);
 452                            remote.add(mUploadPath +
 453                                    c.getString(c.getColumnIndex(Video.Media.DISPLAY_NAME)));
 454
 455                        }
 456                        else if (mimeType.contains("audio")) {
 457                            String[] CONTENT_PROJECTION = { Audio.Media.DATA,
 458                                    Audio.Media.DISPLAY_NAME, Audio.Media.MIME_TYPE,
 459                                    Audio.Media.SIZE };
 460                            Cursor c = getContentResolver().query(uri, CONTENT_PROJECTION, null,
 461                                    null, null);
 462                            c.moveToFirst();
 463                            int index = c.getColumnIndex(Audio.Media.DATA);
 464                            String data = c.getString(index);
 465                            local.add(data);
 466                            remote.add(mUploadPath +
 467                                    c.getString(c.getColumnIndex(Audio.Media.DISPLAY_NAME)));
 468
 469                        }
 470                        else {
 471                            String filePath = Uri.decode(uri.toString()).replace(uri.getScheme() +
 472                                    "://", "");
 473                            // cut everything whats before mnt. It occurred to me that sometimes
 474                            // apps send their name into the URI
 475                            if (filePath.contains("mnt")) {
 476                               String splitedFilePath[] = filePath.split("/mnt");
 477                               filePath = splitedFilePath[1];
 478                            }
 479                            final File file = new File(filePath);
 480                            local.add(file.getAbsolutePath());
 481                            remote.add(mUploadPath + file.getName());
 482                        }
 483
 484                     } else if (uri.getScheme().equals("file")) {
 485                         String filePath = Uri.decode(uri.toString()).replace(uri.getScheme() +
 486                                 "://", "");
 487                         if (filePath.contains("mnt")) {
 488                            String splitedFilePath[] = filePath.split("/mnt");
 489                            filePath = splitedFilePath[1];
 490                         }
 491                         final File file = new File(filePath);
 492                         local.add(file.getAbsolutePath());
 493                         remote.add(mUploadPath + file.getName());
 494                     }
 495                     else {
 496                         throw new SecurityException();
 497                     }
 498                 }
 499                 else {
 500                     throw new SecurityException();
 501                 }
 502
 503             Intent intent = new Intent(getApplicationContext(), FileUploader.class);
 504             intent.putExtra(FileUploader.KEY_UPLOAD_TYPE, FileUploader.UPLOAD_MULTIPLE_FILES);
 505             intent.putExtra(FileUploader.KEY_LOCAL_FILE, local.toArray(new String[local.size()]));
 506             intent.putExtra(FileUploader.KEY_REMOTE_FILE,
 507                     remote.toArray(new String[remote.size()]));
 508             intent.putExtra(FileUploader.KEY_ACCOUNT, mAccount);
 509             startService(intent);
 510
 511             //Save the path to shared preferences
 512             SharedPreferences.Editor appPrefs = PreferenceManager
 513                     .getDefaultSharedPreferences(getApplicationContext()).edit();
 514             appPrefs.putString("last_upload_path", mUploadPath);
 515             appPrefs.apply();
 516
 517             finish();
 518             }
 519
 520         } catch (SecurityException e) {
 521             String message = String.format(getString(R.string.uploader_error_forbidden_content),
 522                     getString(R.string.app_name));
 523             Toast.makeText(this, message, Toast.LENGTH_LONG).show();
 524         }
 525     }
 526
 527     @Override
 528     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 529         super.onRemoteOperationFinish(operation, result);
 530
 531
 532         if (operation instanceof CreateFolderOperation) {
 533             onCreateFolderOperationFinish((CreateFolderOperation)operation, result);
 534         }
 535
 536     }
 537
 538     /**
 539      * Updates the view associated to the activity after the finish of an operation
 540      * trying create a new folder
 541      *
 542      * @param operation     Creation operation performed.
 543      * @param result        Result of the creation.
 544      */
 545     private void onCreateFolderOperationFinish(CreateFolderOperation operation,
 546                                                RemoteOperationResult result) {
 547         if (result.isSuccess()) {
 548             dismissLoadingDialog();
 549             populateDirectoryList();
 550         } else {
 551             dismissLoadingDialog();
 552             try {
 553                 Toast msg = Toast.makeText(this,
 554                         ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
 555                         Toast.LENGTH_LONG);
 556                 msg.show();
 557
 558             } catch (NotFoundException e) {
 559                 Log_OC.e(TAG, "Error while trying to show fail message " , e);
 560             }
 561         }
 562     }
 563
 564
 565     /**
 566      *  Loads the target folder initialize shown to the user.
 567      *
 568      *  The target account has to be chosen before this method is called.
 569      */
 570     private void initTargetFolder() {
 571         if (mStorageManager == null) {
 572             throw new IllegalStateException("Do not call this method before " +
 573                     "initializing mStorageManager");
 574         }
 575
 576         SharedPreferences appPreferences = PreferenceManager
 577                 .getDefaultSharedPreferences(getApplicationContext());
 578
 579         String last_path = appPreferences.getString("last_upload_path", "");
 580         // "/" equals root-directory
 581         if(last_path.equals("/")) {
 582             mParents.add("");
 583         }
 584         else{
 585             String[] dir_names = last_path.split("/");
 586             for (String dir : dir_names)
 587                 mParents.add(dir);
 588         }
 589         //Make sure that path still exists, if it doesn't pop the stack and try the previous path
 590             while(!mStorageManager.fileExists(generatePath(mParents)) && mParents.size() > 1){
 591                 mParents.pop();
 592             }
 593     }
 594
 595
 596     @Override
 597     public boolean onOptionsItemSelected(MenuItem item) {
 598         boolean retval = true;
 599         switch (item.getItemId()) {
 600         case android.R.id.home: {
 601             if((mParents.size() > 1)) {
 602                 onBackPressed();
 603             }
 604             break;
 605         }
 606         default:
 607             retval = super.onOptionsItemSelected(item);
 608         }
 609         return retval;
 610     }
 611
 612
 613 }