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.OCFile;
  68 import com.owncloud.android.files.services.FileUploader;
  69 import com.owncloud.android.lib.common.operations.RemoteOperation;
  70 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  71 import com.owncloud.android.lib.common.utils.Log_OC;
  72 import com.owncloud.android.operations.CreateFolderOperation;
  73 import com.owncloud.android.ui.dialog.CreateFolderDialogFragment;
  74 import com.owncloud.android.utils.DisplayUtils;
  75 import com.owncloud.android.utils.ErrorMessageAdapter;
  76
  77
  78 /**
  79  * This can be used to upload things to an ownCloud instance.
  80  */
  81 public class Uploader extends FileActivity
  82         implements OnItemClickListener, android.view.View.OnClickListener {
  83
  84     private static final String TAG = Uploader.class.getSimpleName();
  85
  86     private AccountManager mAccountManager;
  87     private Stack<String> mParents;
  88     private ArrayList<Parcelable> mStreamsToUpload;
  89     private boolean mCreateDir;
  90     private String mUploadPath;
  91     private OCFile mFile;
  92     private boolean mAccountSelected;
  93
  94     private final static int DIALOG_NO_ACCOUNT = 0;
  95     private final static int DIALOG_WAITING = 1;
  96     private final static int DIALOG_NO_STREAM = 2;
  97     private final static int DIALOG_MULTIPLE_ACCOUNT = 3;
  98
  99     private final static int REQUEST_CODE_SETUP_ACCOUNT = 0;
 100
 101     private final static String KEY_PARENTS = "PARENTS";
 102     private final static String KEY_FILE = "FILE";
 103     private final static String KEY_ACCOUNT_SELECTED = "ACCOUNT_SELECTED";
 104
 105     @Override
 106     protected void onCreate(Bundle savedInstanceState) {
 107         prepareStreamsToUpload();
 108
 109         if (savedInstanceState == null) {
 110             mParents = new Stack<String>();
 111             mAccountSelected = false;
 112         } else {
 113             mParents = (Stack<String>) savedInstanceState.getSerializable(KEY_PARENTS);
 114             mFile = savedInstanceState.getParcelable(KEY_FILE);
 115             mAccountSelected = savedInstanceState.getBoolean(KEY_ACCOUNT_SELECTED);
 116         }
 117         super.onCreate(savedInstanceState);
 118
 119         ActionBar actionBar = getSupportActionBar();
 120         actionBar.setIcon(DisplayUtils.getSeasonalIconId());
 121
 122     }
 123
 124     @Override
 125     protected void setAccount(Account account, boolean savedAccount) {
 126         if (somethingToUpload()) {
 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                 if (!savedAccount) {
 137                     setAccount(accounts[0]);
 138                 }
 139             }
 140
 141         } else {
 142             showDialog(DIALOG_NO_STREAM);
 143         }
 144
 145         super.setAccount(account, savedAccount);
 146     }
 147
 148     @Override
 149     protected void onAccountSet(boolean stateWasRecovered) {
 150         super.onAccountSet(mAccountWasRestored);
 151         initTargetFolder();
 152         populateDirectoryList();
 153     }
 154
 155     @Override
 156     protected void onSaveInstanceState(Bundle outState) {
 157          Log_OC.d(TAG, "onSaveInstanceState() start");
 158         super.onSaveInstanceState(outState);
 159         outState.putSerializable(KEY_PARENTS, mParents);
 160         //outState.putParcelable(KEY_ACCOUNT, mAccount);
 161         outState.putParcelable(KEY_FILE, mFile);
 162         outState.putBoolean(KEY_ACCOUNT_SELECTED, mAccountSelected);
 163
 164         Log_OC.d(TAG, "onSaveInstanceState() end");
 165     }
 166
 167     @Override
 168     protected Dialog onCreateDialog(final int id) {
 169         final AlertDialog.Builder builder = new Builder(this);
 170         switch (id) {
 171         case DIALOG_WAITING:
 172             ProgressDialog pDialog = new ProgressDialog(this);
 173             pDialog.setIndeterminate(false);
 174             pDialog.setCancelable(false);
 175             pDialog.setMessage(getResources().getString(R.string.uploader_info_uploading));
 176             return pDialog;
 177         case DIALOG_NO_ACCOUNT:
 178             builder.setIcon(android.R.drawable.ic_dialog_alert);
 179             builder.setTitle(R.string.uploader_wrn_no_account_title);
 180             builder.setMessage(String.format(
 181                     getString(R.string.uploader_wrn_no_account_text), getString(R.string.app_name)));
 182             builder.setCancelable(false);
 183             builder.setPositiveButton(R.string.uploader_wrn_no_account_setup_btn_text, new OnClickListener() {
 184                 @Override
 185                 public void onClick(DialogInterface dialog, int which) {
 186                     if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.ECLAIR_MR1) {
 187                         // using string value since in API7 this
 188                         // constatn is not defined
 189                         // in API7 < this constatant is defined in
 190                         // Settings.ADD_ACCOUNT_SETTINGS
 191                         // and Settings.EXTRA_AUTHORITIES
 192                         Intent intent = new Intent(android.provider.Settings.ACTION_ADD_ACCOUNT);
 193                         intent.putExtra("authorities", new String[] { MainApp.getAuthTokenType() });
 194                         startActivityForResult(intent, REQUEST_CODE_SETUP_ACCOUNT);
 195                     } else {
 196                         // since in API7 there is no direct call for
 197                         // account setup, so we need to
 198                         // show our own AccountSetupAcricity, get
 199                         // desired results and setup
 200                         // everything for ourself
 201                         Intent intent = new Intent(getBaseContext(), AccountAuthenticator.class);
 202                         startActivityForResult(intent, REQUEST_CODE_SETUP_ACCOUNT);
 203                     }
 204                 }
 205             });
 206             builder.setNegativeButton(R.string.uploader_wrn_no_account_quit_btn_text, new OnClickListener() {
 207                 @Override
 208                 public void onClick(DialogInterface dialog, int which) {
 209                     finish();
 210                 }
 211             });
 212             return builder.create();
 213         case DIALOG_MULTIPLE_ACCOUNT:
 214             CharSequence ac[] = new CharSequence[
 215                     mAccountManager.getAccountsByType(MainApp.getAccountType()).length];
 216             for (int i = 0; i < ac.length; ++i) {
 217                 ac[i] = DisplayUtils.convertIdn(
 218                         mAccountManager.getAccountsByType(MainApp.getAccountType())[i].name, false);
 219             }
 220             builder.setTitle(R.string.common_choose_account);
 221             builder.setItems(ac, new OnClickListener() {
 222                 @Override
 223                 public void onClick(DialogInterface dialog, int which) {
 224                     setAccount(mAccountManager.getAccountsByType(MainApp.getAccountType())[which]);
 225                     onAccountSet(mAccountWasRestored);
 226                     dialog.dismiss();
 227                     mAccountSelected = true;
 228                 }
 229             });
 230             builder.setCancelable(true);
 231             builder.setOnCancelListener(new OnCancelListener() {
 232                 @Override
 233                 public void onCancel(DialogInterface dialog) {
 234                     dialog.cancel();
 235                     finish();
 236                 }
 237             });
 238             return builder.create();
 239         case DIALOG_NO_STREAM:
 240             builder.setIcon(android.R.drawable.ic_dialog_alert);
 241             builder.setTitle(R.string.uploader_wrn_no_content_title);
 242             builder.setMessage(R.string.uploader_wrn_no_content_text);
 243             builder.setCancelable(false);
 244             builder.setNegativeButton(R.string.common_cancel, new OnClickListener() {
 245                 @Override
 246                 public void onClick(DialogInterface dialog, int which) {
 247                     finish();
 248                 }
 249             });
 250             return builder.create();
 251         default:
 252             throw new IllegalArgumentException("Unknown dialog id: " + id);
 253         }
 254     }
 255
 256     class a implements OnClickListener {
 257         String mPath;
 258         EditText mDirname;
 259
 260         public a(String path, EditText dirname) {
 261             mPath = path;
 262             mDirname = dirname;
 263         }
 264
 265         @Override
 266         public void onClick(DialogInterface dialog, int which) {
 267             Uploader.this.mUploadPath = mPath + mDirname.getText().toString();
 268             Uploader.this.mCreateDir = true;
 269             uploadFiles();
 270         }
 271     }
 272
 273     @Override
 274     public void onBackPressed() {
 275
 276         if (mParents.size() <= 1) {
 277             super.onBackPressed();
 278             return;
 279         } else {
 280             mParents.pop();
 281             populateDirectoryList();
 282         }
 283     }
 284
 285     @Override
 286     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 287         // click on folder in the list
 288         Log_OC.d(TAG, "on item click");
 289         Vector<OCFile> tmpfiles = getStorageManager().getFolderContent(mFile);
 290         if (tmpfiles.size() <= 0) return;
 291         // filter on dirtype
 292         Vector<OCFile> files = new Vector<OCFile>();
 293         for (OCFile f : tmpfiles)
 294             if (f.isFolder())
 295                 files.add(f);
 296         if (files.size() < position) {
 297             throw new IndexOutOfBoundsException("Incorrect item selected");
 298         }
 299         mParents.push(files.get(position).getFileName());
 300         populateDirectoryList();
 301     }
 302
 303     @Override
 304     public void onClick(View v) {
 305         // click on button
 306         switch (v.getId()) {
 307         case R.id.uploader_choose_folder:
 308             mUploadPath = "";   // first element in mParents is root dir, represented by "";
 309                                 // init mUploadPath with "/" results in a "//" prefix
 310             for (String p : mParents)
 311                 mUploadPath += p + OCFile.PATH_SEPARATOR;
 312             Log_OC.d(TAG, "Uploading file to dir " + mUploadPath);
 313
 314             uploadFiles();
 315
 316             break;
 317
 318         case R.id.uploader_new_folder:
 319             CreateFolderDialogFragment dialog = CreateFolderDialogFragment.newInstance(mFile);
 320             dialog.show(getSupportFragmentManager(), "createdirdialog");
 321             break;
 322
 323
 324         default:
 325             throw new IllegalArgumentException("Wrong element clicked");
 326         }
 327     }
 328
 329     @Override
 330     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 331         super.onActivityResult(requestCode, resultCode, data);
 332         Log_OC.i(TAG, "result received. req: " + requestCode + " res: " + resultCode);
 333         if (requestCode == REQUEST_CODE_SETUP_ACCOUNT) {
 334             dismissDialog(DIALOG_NO_ACCOUNT);
 335             if (resultCode == RESULT_CANCELED) {
 336                 finish();
 337             }
 338             Account[] accounts = mAccountManager.getAccountsByType(MainApp.getAuthTokenType());
 339             if (accounts.length == 0) {
 340                 showDialog(DIALOG_NO_ACCOUNT);
 341             } else {
 342                 // there is no need for checking for is there more then one
 343                 // account at this point
 344                 // since account setup can set only one account at time
 345                 setAccount(accounts[0]);
 346                 populateDirectoryList();
 347             }
 348         }
 349     }
 350
 351     private void populateDirectoryList() {
 352         setContentView(R.layout.uploader_layout);
 353
 354         ListView mListView = (ListView) findViewById(android.R.id.list);
 355
 356         String current_dir = mParents.peek();
 357         if(current_dir.equals("")){
 358             getSupportActionBar().setTitle(getString(R.string.default_display_name_for_root_folder));
 359         }
 360         else{
 361             getSupportActionBar().setTitle(current_dir);
 362         }
 363         boolean notRoot = (mParents.size() > 1);
 364         ActionBar actionBar = getSupportActionBar();
 365         actionBar.setDisplayHomeAsUpEnabled(notRoot);
 366         actionBar.setHomeButtonEnabled(notRoot);
 367
 368         String full_path = generatePath(mParents);
 369
 370         Log_OC.d(TAG, "Populating view with content of : " + full_path);
 371
 372         mFile = getStorageManager().getFileByPath(full_path);
 373         if (mFile != null) {
 374             Vector<OCFile> files = getStorageManager().getFolderContent(mFile);
 375             List<HashMap<String, Object>> data = new LinkedList<HashMap<String,Object>>();
 376             for (OCFile f : files) {
 377                 HashMap<String, Object> h = new HashMap<String, Object>();
 378                 if (f.isFolder()) {
 379                     h.put("dirname", f.getFileName());
 380                     data.add(h);
 381                 }
 382             }
 383             SimpleAdapter sa = new SimpleAdapter(this,
 384                                                 data,
 385                                                 R.layout.uploader_list_item_layout,
 386                                                 new String[] {"dirname"},
 387                                                 new int[] {R.id.textView1});
 388
 389             mListView.setAdapter(sa);
 390             Button btnChooseFolder = (Button) findViewById(R.id.uploader_choose_folder);
 391             btnChooseFolder.setOnClickListener(this);
 392
 393             Button btnNewFolder = (Button) findViewById(R.id.uploader_new_folder);
 394             btnNewFolder.setOnClickListener(this);
 395
 396             mListView.setOnItemClickListener(this);
 397         }
 398     }
 399
 400     private String generatePath(Stack<String> dirs) {
 401         String full_path = "";
 402
 403         for (String a : dirs)
 404             full_path += a + "/";
 405         return full_path;
 406     }
 407
 408     private void prepareStreamsToUpload() {
 409         if (getIntent().getAction().equals(Intent.ACTION_SEND)) {
 410             mStreamsToUpload = new ArrayList<Parcelable>();
 411             mStreamsToUpload.add(getIntent().getParcelableExtra(Intent.EXTRA_STREAM));
 412         } else if (getIntent().getAction().equals(Intent.ACTION_SEND_MULTIPLE)) {
 413             mStreamsToUpload = getIntent().getParcelableArrayListExtra(Intent.EXTRA_STREAM);
 414         }
 415     }
 416
 417     private boolean somethingToUpload() {
 418         return (mStreamsToUpload != null && mStreamsToUpload.get(0) != null);
 419     }
 420
 421     public void uploadFiles() {
 422         try {
 423
 424             ArrayList<String> local = new ArrayList<String>();
 425             ArrayList<String> remote = new ArrayList<String>();
 426
 427             // this checks the mimeType
 428             for (Parcelable mStream : mStreamsToUpload) {
 429
 430                 Uri uri = (Uri) mStream;
 431                 if (uri !=null) {
 432                     if (uri.getScheme().equals("content")) {
 433
 434                        String mimeType = getContentResolver().getType(uri);
 435
 436                        if (mimeType.contains("image")) {
 437                            String[] CONTENT_PROJECTION = { Images.Media.DATA,
 438                                    Images.Media.DISPLAY_NAME, Images.Media.MIME_TYPE,
 439                                    Images.Media.SIZE};
 440                            Cursor c = getContentResolver().query(uri, CONTENT_PROJECTION, null,
 441                                    null, null);
 442                            c.moveToFirst();
 443                            int index = c.getColumnIndex(Images.Media.DATA);
 444                            String data = c.getString(index);
 445                            local.add(data);
 446                            remote.add(mUploadPath +
 447                                    c.getString(c.getColumnIndex(Images.Media.DISPLAY_NAME)));
 448
 449                        }
 450                        else if (mimeType.contains("video")) {
 451                            String[] CONTENT_PROJECTION = { Video.Media.DATA,
 452                                    Video.Media.DISPLAY_NAME, Video.Media.MIME_TYPE,
 453                                    Video.Media.SIZE, Video.Media.DATE_MODIFIED };
 454                            Cursor c = getContentResolver().query(uri, CONTENT_PROJECTION, null,
 455                                    null, null);
 456                            c.moveToFirst();
 457                            int index = c.getColumnIndex(Video.Media.DATA);
 458                            String data = c.getString(index);
 459                            local.add(data);
 460                            remote.add(mUploadPath +
 461                                    c.getString(c.getColumnIndex(Video.Media.DISPLAY_NAME)));
 462
 463                        }
 464                        else if (mimeType.contains("audio")) {
 465                            String[] CONTENT_PROJECTION = { Audio.Media.DATA,
 466                                    Audio.Media.DISPLAY_NAME, Audio.Media.MIME_TYPE,
 467                                    Audio.Media.SIZE };
 468                            Cursor c = getContentResolver().query(uri, CONTENT_PROJECTION, null,
 469                                    null, null);
 470                            c.moveToFirst();
 471                            int index = c.getColumnIndex(Audio.Media.DATA);
 472                            String data = c.getString(index);
 473                            local.add(data);
 474                            remote.add(mUploadPath +
 475                                    c.getString(c.getColumnIndex(Audio.Media.DISPLAY_NAME)));
 476
 477                        }
 478                        else {
 479                            String filePath = Uri.decode(uri.toString()).replace(uri.getScheme() +
 480                                    "://", "");
 481                            // cut everything whats before mnt. It occurred to me that sometimes
 482                            // apps send their name into the URI
 483                            if (filePath.contains("mnt")) {
 484                               String splitedFilePath[] = filePath.split("/mnt");
 485                               filePath = splitedFilePath[1];
 486                            }
 487                            final File file = new File(filePath);
 488                            local.add(file.getAbsolutePath());
 489                            remote.add(mUploadPath + file.getName());
 490                        }
 491
 492                     } else if (uri.getScheme().equals("file")) {
 493                         String filePath = Uri.decode(uri.toString()).replace(uri.getScheme() +
 494                                 "://", "");
 495                         if (filePath.contains("mnt")) {
 496                            String splitedFilePath[] = filePath.split("/mnt");
 497                            filePath = splitedFilePath[1];
 498                         }
 499                         final File file = new File(filePath);
 500                         local.add(file.getAbsolutePath());
 501                         remote.add(mUploadPath + file.getName());
 502                     }
 503                     else {
 504                         throw new SecurityException();
 505                     }
 506                 }
 507                 else {
 508                     throw new SecurityException();
 509                 }
 510
 511             Intent intent = new Intent(getApplicationContext(), FileUploader.class);
 512             intent.putExtra(FileUploader.KEY_UPLOAD_TYPE, FileUploader.UPLOAD_MULTIPLE_FILES);
 513             intent.putExtra(FileUploader.KEY_LOCAL_FILE, local.toArray(new String[local.size()]));
 514             intent.putExtra(FileUploader.KEY_REMOTE_FILE,
 515                     remote.toArray(new String[remote.size()]));
 516             intent.putExtra(FileUploader.KEY_ACCOUNT, getAccount());
 517             startService(intent);
 518
 519             //Save the path to shared preferences
 520             SharedPreferences.Editor appPrefs = PreferenceManager
 521                     .getDefaultSharedPreferences(getApplicationContext()).edit();
 522             appPrefs.putString("last_upload_path", mUploadPath);
 523             appPrefs.apply();
 524
 525             finish();
 526             }
 527
 528         } catch (SecurityException e) {
 529             String message = String.format(getString(R.string.uploader_error_forbidden_content),
 530                     getString(R.string.app_name));
 531             Toast.makeText(this, message, Toast.LENGTH_LONG).show();
 532         }
 533     }
 534
 535     @Override
 536     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 537         super.onRemoteOperationFinish(operation, result);
 538
 539
 540         if (operation instanceof CreateFolderOperation) {
 541             onCreateFolderOperationFinish((CreateFolderOperation)operation, result);
 542         }
 543
 544     }
 545
 546     /**
 547      * Updates the view associated to the activity after the finish of an operation
 548      * trying create a new folder
 549      *
 550      * @param operation     Creation operation performed.
 551      * @param result        Result of the creation.
 552      */
 553     private void onCreateFolderOperationFinish(CreateFolderOperation operation,
 554                                                RemoteOperationResult result) {
 555         if (result.isSuccess()) {
 556             dismissLoadingDialog();
 557             populateDirectoryList();
 558         } else {
 559             dismissLoadingDialog();
 560             try {
 561                 Toast msg = Toast.makeText(this,
 562                         ErrorMessageAdapter.getErrorCauseMessage(result, operation, getResources()),
 563                         Toast.LENGTH_LONG);
 564                 msg.show();
 565
 566             } catch (NotFoundException e) {
 567                 Log_OC.e(TAG, "Error while trying to show fail message " , e);
 568             }
 569         }
 570     }
 571
 572
 573     /**
 574      *  Loads the target folder initialize shown to the user.
 575      *
 576      *  The target account has to be chosen before this method is called.
 577      */
 578     private void initTargetFolder() {
 579         if (getStorageManager() == null) {
 580             throw new IllegalStateException("Do not call this method before " +
 581                     "initializing mStorageManager");
 582         }
 583
 584         SharedPreferences appPreferences = PreferenceManager
 585                 .getDefaultSharedPreferences(getApplicationContext());
 586
 587         String last_path = appPreferences.getString("last_upload_path", "");
 588         // "/" equals root-directory
 589         if(last_path.equals("/")) {
 590             mParents.add("");
 591         }
 592         else{
 593             String[] dir_names = last_path.split("/");
 594             for (String dir : dir_names)
 595                 mParents.add(dir);
 596         }
 597         //Make sure that path still exists, if it doesn't pop the stack and try the previous path
 598             while(!getStorageManager().fileExists(generatePath(mParents)) && mParents.size() > 1){
 599                 mParents.pop();
 600             }
 601     }
 602
 603
 604     @Override
 605     public boolean onOptionsItemSelected(MenuItem item) {
 606         boolean retval = true;
 607         switch (item.getItemId()) {
 608         case android.R.id.home: {
 609             if((mParents.size() > 1)) {
 610                 onBackPressed();
 611             }
 612             break;
 613         }
 614         default:
 615             retval = super.onOptionsItemSelected(item);
 616         }
 617         return retval;
 618     }
 619
 620
 621 }