public void doRestart() {
   try {
     String action = "org.mozilla.gecko.restart";
     Intent intent = new Intent(action);
     intent.setClassName(getPackageName(), getPackageName() + ".Restarter");
     addEnvToIntent(intent);
     intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
     Log.i(LOG_FILE_NAME, intent.toString());
     GeckoAppShell.killAnyZombies();
     startActivity(intent);
   } catch (Exception e) {
     Log.i(LOG_FILE_NAME, "error doing restart", e);
   }
   finish();
   // Give the restart process time to start before we die
   GeckoAppShell.waitForAnotherGeckoProc();
 }
  public String showFilePicker(String aMimeType) {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    intent.setType(aMimeType);
    GeckoApp.this.startActivityForResult(
        Intent.createChooser(intent, getString(R.string.choose_file)), FILE_PICKER_REQUEST);
    String filePickerResult = "";

    try {
      while (null == (filePickerResult = mFilePickerResult.poll(1, TimeUnit.MILLISECONDS))) {
        Log.i("GeckoApp", "processing events from showFilePicker ");
        GeckoAppShell.processNextNativeEvent();
      }
    } catch (InterruptedException e) {
      Log.i(LOG_FILE_NAME, "showing file picker ", e);
    }

    return filePickerResult;
  }
  @Override
  protected void onNewIntent(Intent intent) {
    if (checkLaunchState(LaunchState.GeckoExiting)) {
      // We're exiting and shouldn't try to do anything else just incase
      // we're hung for some reason we'll force the process to exit
      System.exit(0);
      return;
    }
    final String action = intent.getAction();
    if (ACTION_DEBUG.equals(action)
        && checkAndSetLaunchState(LaunchState.Launching, LaunchState.WaitForDebugger)) {

      mMainHandler.postDelayed(
          new Runnable() {
            public void run() {
              Log.i(LOG_FILE_NAME, "Launching from debug intent after 5s wait");
              setLaunchState(LaunchState.Launching);
              launch(null);
            }
          },
          1000 * 5 /* 5 seconds */);
      Log.i(LOG_FILE_NAME, "Intent : ACTION_DEBUG - waiting 5s before launching");
      return;
    }
    if (checkLaunchState(LaunchState.WaitForDebugger) || launch(intent)) return;

    if (Intent.ACTION_MAIN.equals(action)) {
      Log.i(LOG_FILE_NAME, "Intent : ACTION_MAIN");
      GeckoAppShell.sendEventToGecko(new GeckoEvent(""));
    } else if (Intent.ACTION_VIEW.equals(action)) {
      String uri = intent.getDataString();
      GeckoAppShell.sendEventToGecko(new GeckoEvent(uri));
      Log.i(LOG_FILE_NAME, "onNewIntent: " + uri);
    } else if (ACTION_WEBAPP.equals(action)) {
      String uri = intent.getStringExtra("args");
      GeckoAppShell.sendEventToGecko(new GeckoEvent(uri));
      Log.i(LOG_FILE_NAME, "Intent : WEBAPP - " + uri);
    } else if (ACTION_BOOKMARK.equals(action)) {
      String args = intent.getStringExtra("args");
      GeckoAppShell.sendEventToGecko(new GeckoEvent(args));
      Log.i(LOG_FILE_NAME, "Intent : BOOKMARK - " + args);
    }
  }
  // code which handles the action for each menu item
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case R.id.settings:
        {
          Intent preferences_intent = new Intent();
          preferences_intent.setComponent(
              new ComponentName(download_photos.this, preferences.class));
          preferences_intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          getApplicationContext().startActivity(preferences_intent);

          return true;
        }
      case R.id.logout:
        {
          try {
            download_photos.this.facebook.logout(getApplicationContext());
          } catch (IOException e) {
            e.printStackTrace();
          }

          mPrefs = getSharedPreferences("COMMON", MODE_PRIVATE);

          SharedPreferences.Editor editor = mPrefs.edit();
          editor.putString("access_token", null);
          editor.putLong("access_expires", 0);
          editor.putBoolean("logout", true);
          editor.commit();
          finish();
          return true;
        }
      case R.id.about:
        {
          // shows our customized about dialog
          AboutDialog about = new AboutDialog(this);

          about.show();
          return true;
        }
        // lets deal with default case
      default:
        return super.onOptionsItemSelected(item);
    }
  }
 public void addEnvToIntent(Intent intent) {
   Map<String, String> envMap = System.getenv();
   Set<Map.Entry<String, String>> envSet = envMap.entrySet();
   Iterator<Map.Entry<String, String>> envIter = envSet.iterator();
   int c = 0;
   while (envIter.hasNext()) {
     Map.Entry<String, String> entry = envIter.next();
     intent.putExtra("env" + c, entry.getKey() + "=" + entry.getValue());
     c++;
   }
 }
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    String filePickerResult = "";
    if (data != null && resultCode == RESULT_OK) {
      try {
        ContentResolver cr = getContentResolver();
        Uri uri = data.getData();
        Cursor cursor =
            GeckoApp.mAppContext
                .getContentResolver()
                .query(uri, new String[] {OpenableColumns.DISPLAY_NAME}, null, null, null);
        String name = null;
        if (cursor != null) {
          try {
            if (cursor.moveToNext()) {
              name = cursor.getString(0);
            }
          } finally {
            cursor.close();
          }
        }
        String fileName = "tmp_";
        String fileExt = null;
        int period;
        if (name == null || (period = name.lastIndexOf('.')) == -1) {
          String mimeType = cr.getType(uri);
          fileExt = "." + GeckoAppShell.getExtensionFromMimeType(mimeType);
        } else {
          fileExt = name.substring(period);
          fileName = name.substring(0, period);
        }
        File file = File.createTempFile(fileName, fileExt, sGREDir);

        FileOutputStream fos = new FileOutputStream(file);
        InputStream is = cr.openInputStream(uri);
        byte[] buf = new byte[4096];
        int len = is.read(buf);
        while (len != -1) {
          fos.write(buf, 0, len);
          len = is.read(buf);
        }
        fos.close();
        filePickerResult = file.getAbsolutePath();
      } catch (Exception e) {
        Log.e(LOG_FILE_NAME, "showing file picker", e);
      }
    }
    try {
      mFilePickerResult.put(filePickerResult);
    } catch (InterruptedException e) {
      Log.i(LOG_FILE_NAME, "error returning file picker result", e);
    }
  }
  @Override
  public void onCreate(Bundle savedInstanceState) {
    // locks the screen in portrait mode
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

    super.onCreate(savedInstanceState);
    setContentView(R.layout.downloader);
    mtext = (TextView) findViewById(R.id.mtext);
    progress_text = (TextView) findViewById(R.id.progress_text);
    progress_download = (ProgressBar) findViewById(R.id.progress_download);
    // resume capability

    paused = false;
    resume_pause = (Button) findViewById(R.id.resume);

    // Create and launch the download thread
    downloadThread = new DownloadThread(this);
    downloadThread.start();

    // Create the Handler. It will implicitly bind to the Looper
    // that is internally created for this thread (since it is the UI thread)
    handler = new Handler();

    resume_pause.setOnClickListener(
        new View.OnClickListener() {
          public void onClick(View v) {
            if (!paused) {
              paused = true;
              resume_pause.setText("Resume");
              // writeProgress(completed_downloads,total_files_to_download);
              downloadThread.requestStop();
              downloadThread = null;

            } else {
              resume_pause.setText("Pause");
              paused = false;

              initial_value = readProgress()[0];
              final_value = links.size();

              for (int i = initial_value; i < links.size(); i++) {
                downloadThread = new DownloadThread(download_photos.this);
                downloadThread.start();
                downloadThread.enqueueDownload(
                    new DownloadTask(
                        links.get(i), path, i + 1, links.size(), download_photos.this));
              }
            }
          }
        });

    // load preferences for this activity
    mPrefs = getSharedPreferences("COMMON", MODE_PRIVATE);

    // This declaration is solely meant for reading the checkbox preference for downloading high res
    // pics.
    SharedPreferences dl_prefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());

    // The global variable is set after reading the  checkbox preference.
    dl_high_res_pics = dl_prefs.getBoolean("download_high_res", false);

    // load fb access token and its expiry values
    String access_token = mPrefs.getString("access_token", null);
    long expires = mPrefs.getLong("access_expires", 0);

    if (access_token != null) {
      facebook.setAccessToken(access_token);
    }
    if (expires != 0) {
      facebook.setAccessExpires(expires);
    }

    // get friend_name and album_name from the intent which started this activity
    Intent starting_intent = getIntent();
    album_id = starting_intent.getStringExtra("id");
    album_name = starting_intent.getStringExtra("name");
    friend_name = starting_intent.getStringExtra("friend_name");

    // real album and friend name may contain characters not suitable for file names.
    // regex pattern includes most of the invalid characters in file names
    legal_album_name = album_name.replaceAll("[.\\\\/:*?\"<>|]?[\\\\/:*?\"<>|]*", "");
    legal_friend_name = friend_name.replaceAll("[.\\\\/:*?\"<>|]?[\\\\/:*?\"<>|]*", "");

    // initialise the directory structure for download
    path =
        new File(
            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
                + "/"
                + getText(R.string.app_name)
                + "/"
                + legal_friend_name
                + "/"
                + legal_album_name);
    if (dl_high_res_pics)
      path = new File(path.toString() + "/" + getText(R.string.folder_name_high_res));

    resume_file = new File(path, "resume.txt");
    // implements actions to done after receiving json object
    class meRequestListener extends BaseRequestListener {
      @Override
      public void onComplete(String response, Object state) {
        try {
          Log.i(TAG, response);
          json = Util.parseJson(response);

          // photos are in the form of a json array
          child = json.getJSONArray("data");

          int total = child.length();

          // contains links to photos
          links = new ArrayList<String>(total);

          // adds link to each photo to our list after replacing the "https" from url
          // DownloadManager does not support https in gingerbread
          for (int i = 0; i < total; i++) {
            photo_json = child.getJSONObject(i);

            if (dl_high_res_pics) {
              JSONArray image_set = photo_json.getJSONArray("images");

              // highest resolution picture has the index zero in the images jsonarray
              JSONObject highest_res_pic = image_set.getJSONObject(0);
              String http_replaced =
                  highest_res_pic.getString("source").replaceFirst("https", "http");
              links.add(i, http_replaced);
            } else {
              // source property of the json object points to the photo's link
              String http_replaced = photo_json.getString("source").replaceFirst("https", "http");
              links.add(i, http_replaced);
            }
          }

          download_photos.this.runOnUiThread(
              new Runnable() {
                public void run() {
                  //	mytask = new DownloadImageTask();
                  //	mytask.execute(links);
                  // start downloading using asynctask
                  // new DownloadImageTask().execute(links);
                  // downloadThread.setPath(path);
                  // downloadThread.setWholeTasks(links.size());
                  if (resume_file.exists()) {

                    initial_value = readProgress()[0];
                    final_value = links.size();
                    // case if the task is already completed
                    if (initial_value == final_value) {
                      completed = true;
                      resume_pause.setVisibility(View.GONE);

                      progress_download.setMax(final_value);
                      progress_download.setProgress(0); // bug in progress bar
                      progress_download.setProgress(initial_value);

                      progress_text.setText("Completed.");
                      mtext.setText(
                          getText(R.string.download_textview_message_1)
                              + " "
                              + path.toString()
                              + ". ");

                    }

                    // case if some of the photos are already downloaded
                    else {
                      progress_download.setMax(links.size());
                      // progress_download.setProgress(0);	//bug in progress bar
                      progress_download.setProgress(initial_value);

                      // N.B if i= initial_value -1, then one image will be downloaded again. so to
                      // save cost we start with i = initial_value
                      for (int i = initial_value; i < links.size(); i++) {
                        mtext.setText(
                            getText(R.string.download_textview_message_1)
                                + " "
                                + path.toString()
                                + ". ");
                        // downloadThread.setRunningTask(i + 1);
                        downloadThread.enqueueDownload(
                            new DownloadTask(
                                links.get(i), path, i + 1, final_value, download_photos.this));
                      }
                    }
                  }

                  // case if the task is entirely new task
                  else {
                    for (int i = 0; i < links.size(); i++) {
                      mtext.setText(
                          getText(R.string.download_textview_message_1)
                              + " "
                              + path.toString()
                              + ". ");
                      // downloadThread.setRunningTask(i + 1);
                      downloadThread.enqueueDownload(
                          new DownloadTask(
                              links.get(i), path, i + 1, links.size(), download_photos.this));
                    }
                  }
                }
              });
        } catch (JSONException ex) {
          Log.e(TAG, "JSONEXception : " + ex.getMessage());
        }
      }
    }

    // makes asynchronous request to facebook graph api
    // the actions to be performed after receiving json response is implemented above

    Bundle parameters = new Bundle();

    // facebook returns only 25 photos when limit is not specified.
    parameters.putString("limit", max_photos_in_album);
    if (!completed) mAsyncRunner.request(album_id + "/photos", parameters, new meRequestListener());

    if (!facebook.isSessionValid()) {
      facebook.authorize(
          this,
          permissions,
          new DialogListener() {

            // save fb access token and its expiry values to prefernces of this activity
            @Override
            public void onComplete(Bundle values) {
              SharedPreferences.Editor editor = mPrefs.edit();
              editor.putString("access_token", facebook.getAccessToken());
              editor.putLong("access_expires", facebook.getAccessExpires());
              editor.commit();
            }

            @Override
            public void onFacebookError(FacebookError error) {
              Log.e(TAG, "Facebook Error : " + error.getMessage());
            }

            @Override
            public void onError(DialogError e) {
              Log.e(TAG, e.getMessage());
            }

            @Override
            public void onCancel() {
              // do nothing LOL :-)
            }
          });
    }
  }