@Override
 protected void onResume() {
   super.onResume();
   if (StorageUtils.storageAvailable()) {
     leaveErrorState();
   } else {
     registerReceiver(mediaUpdate, new IntentFilter(Intent.ACTION_MEDIA_MOUNTED));
   }
 }
 @Override
 protected void onResume() {
   super.onResume();
   StorageUtils.checkStorageAvailability(this);
   Intent intent = getIntent();
   if (intent.getAction() != null && intent.getAction().equals(Intent.ACTION_SEND)) {
     if (AppConfig.DEBUG) Log.d(TAG, "Was started with ACTION_SEND intent");
     String text = intent.getStringExtra(Intent.EXTRA_TEXT);
     if (text != null) {
       etxtFeedurl.setText(text);
     } else {
       if (AppConfig.DEBUG) Log.d(TAG, "No text was sent");
     }
   }
 }
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    setTheme(PodcastApp.getThemeResourceId());
    super.onCreate(savedInstanceState);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    StorageUtils.checkStorageAvailability(this);
    setContentView(R.layout.addfeed);

    requester = DownloadRequester.getInstance();
    progDialog = new ProgressDialog(this);

    etxtFeedurl = (EditText) findViewById(R.id.etxtFeedurl);
    butBrowseMiroGuide = (Button) findViewById(R.id.butBrowseMiroguide);
    butOpmlImport = (Button) findViewById(R.id.butOpmlImport);
    butGreaderImport = (Button) findViewById(R.id.butGreaderImport);
    butConfirm = (Button) findViewById(R.id.butConfirm);
    butCancel = (Button) findViewById(R.id.butCancel);

    butBrowseMiroGuide.setOnClickListener(
        new OnClickListener() {

          @Override
          public void onClick(View v) {
            startActivity(new Intent(AddFeedActivity.this, MiroGuideMainActivity.class));
          }
        });

    butOpmlImport.setOnClickListener(
        new OnClickListener() {

          @Override
          public void onClick(View v) {
            startActivity(new Intent(AddFeedActivity.this, OpmlImportFromPathActivity.class));
          }
        });

    butGreaderImport.setOnClickListener(
        new OnClickListener() {

          @Override
          public void onClick(View v) {
            startActivity(new Intent(AddFeedActivity.this, GoogleReaderImportActivity.class));
          }
        });

    butConfirm.setOnClickListener(
        new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            addNewFeed();
          }
        });

    butCancel.setOnClickListener(
        new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            setResult(RESULT_CANCELED);
            finish();
          }
        });
  }
  @Override
  protected void download() {
    File destination = new File(request.getDestination());
    final boolean fileExists = destination.exists();

    if (request.isDeleteOnFailure() && fileExists) {
      Log.w(TAG, "File already exists");
      if (request.getFeedfileType() != FeedImage.FEEDFILETYPE_FEEDIMAGE) {
        onFail(DownloadError.ERROR_FILE_EXISTS, null);
        return;
      } else {
        onSuccess();
        return;
      }
    }

    HttpClient httpClient = AntennapodHttpClient.getHttpClient();
    RandomAccessFile out = null;
    InputStream connection = null;
    try {
      HttpGet httpGet = new HttpGet(URIUtil.getURIFromRequestUrl(request.getSource()));

      // add authentication information
      String userInfo = httpGet.getURI().getUserInfo();
      if (userInfo != null) {
        String[] parts = userInfo.split(":");
        if (parts.length == 2) {
          httpGet.addHeader(
              BasicScheme.authenticate(
                  new UsernamePasswordCredentials(parts[0], parts[1]), "UTF-8", false));
        }
      } else if (!StringUtils.isEmpty(request.getUsername()) && request.getPassword() != null) {
        httpGet.addHeader(
            BasicScheme.authenticate(
                new UsernamePasswordCredentials(request.getUsername(), request.getPassword()),
                "UTF-8",
                false));
      }

      // add range header if necessary
      if (fileExists) {
        request.setSoFar(destination.length());
        httpGet.addHeader(new BasicHeader("Range", "bytes=" + request.getSoFar() + "-"));
        if (BuildConfig.DEBUG) Log.d(TAG, "Adding range header: " + request.getSoFar());
      }

      HttpResponse response = httpClient.execute(httpGet);
      HttpEntity httpEntity = response.getEntity();
      int responseCode = response.getStatusLine().getStatusCode();
      Header contentEncodingHeader = response.getFirstHeader("Content-Encoding");

      final boolean isGzip =
          contentEncodingHeader != null
              && contentEncodingHeader.getValue().equalsIgnoreCase("gzip");

      if (BuildConfig.DEBUG) Log.d(TAG, "Response code is " + responseCode);

      if (responseCode / 100 != 2 || httpEntity == null) {
        final DownloadError error;
        final String details;
        if (responseCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
          error = DownloadError.ERROR_UNAUTHORIZED;
          details = String.valueOf(responseCode);
        } else {
          error = DownloadError.ERROR_HTTP_DATA_ERROR;
          details = String.valueOf(responseCode);
        }
        onFail(error, details);
        return;
      }

      if (!StorageUtils.storageAvailable(PodcastApp.getInstance())) {
        onFail(DownloadError.ERROR_DEVICE_NOT_FOUND, null);
        return;
      }

      connection = new BufferedInputStream(AndroidHttpClient.getUngzippedContent(httpEntity));

      Header[] contentRangeHeaders = (fileExists) ? response.getHeaders("Content-Range") : null;

      if (fileExists
          && responseCode == HttpStatus.SC_PARTIAL_CONTENT
          && contentRangeHeaders != null
          && contentRangeHeaders.length > 0) {
        String start =
            contentRangeHeaders[0]
                .getValue()
                .substring("bytes ".length(), contentRangeHeaders[0].getValue().indexOf("-"));
        request.setSoFar(Long.valueOf(start));
        Log.d(TAG, "Starting download at position " + request.getSoFar());

        out = new RandomAccessFile(destination, "rw");
        out.seek(request.getSoFar());
      } else {
        destination.delete();
        destination.createNewFile();
        out = new RandomAccessFile(destination, "rw");
      }

      byte[] buffer = new byte[BUFFER_SIZE];
      int count = 0;
      request.setStatusMsg(R.string.download_running);
      if (BuildConfig.DEBUG) Log.d(TAG, "Getting size of download");
      request.setSize(httpEntity.getContentLength() + request.getSoFar());
      if (BuildConfig.DEBUG) Log.d(TAG, "Size is " + request.getSize());
      if (request.getSize() < 0) {
        request.setSize(DownloadStatus.SIZE_UNKNOWN);
      }

      long freeSpace = StorageUtils.getFreeSpaceAvailable();
      if (BuildConfig.DEBUG) Log.d(TAG, "Free space is " + freeSpace);

      if (request.getSize() != DownloadStatus.SIZE_UNKNOWN && request.getSize() > freeSpace) {
        onFail(DownloadError.ERROR_NOT_ENOUGH_SPACE, null);
        return;
      }

      if (BuildConfig.DEBUG) Log.d(TAG, "Starting download");
      while (!cancelled && (count = connection.read(buffer)) != -1) {
        out.write(buffer, 0, count);
        request.setSoFar(request.getSoFar() + count);
        request.setProgressPercent(
            (int) (((double) request.getSoFar() / (double) request.getSize()) * 100));
      }
      if (cancelled) {
        onCancelled();
      } else {
        // check if size specified in the response header is the same as the size of the
        // written file. This check cannot be made if compression was used
        if (!isGzip
            && request.getSize() != DownloadStatus.SIZE_UNKNOWN
            && request.getSoFar() != request.getSize()) {
          onFail(
              DownloadError.ERROR_IO_ERROR,
              "Download completed but size: "
                  + request.getSoFar()
                  + " does not equal expected size "
                  + request.getSize());
          return;
        }
        onSuccess();
      }

    } catch (IllegalArgumentException e) {
      e.printStackTrace();
      onFail(DownloadError.ERROR_MALFORMED_URL, e.getMessage());
    } catch (SocketTimeoutException e) {
      e.printStackTrace();
      onFail(DownloadError.ERROR_CONNECTION_ERROR, e.getMessage());
    } catch (UnknownHostException e) {
      e.printStackTrace();
      onFail(DownloadError.ERROR_UNKNOWN_HOST, e.getMessage());
    } catch (IOException e) {
      e.printStackTrace();
      onFail(DownloadError.ERROR_IO_ERROR, e.getMessage());
    } catch (NullPointerException e) {
      // might be thrown by connection.getInputStream()
      e.printStackTrace();
      onFail(DownloadError.ERROR_CONNECTION_ERROR, request.getSource());
    } finally {
      IOUtils.closeQuietly(out);
      AntennapodHttpClient.cleanup();
    }
  }