title: android browse file intent with defined extension
body: <p>I need to create intent that will open file manager (if any installed) and I want file manager  to show only txt files to user, so user couldn't choose file with wrong extension.</p>
  
  <pre><code>    private static final int FILE_SELECT_CODE = 0;
  
  private void showFileChooser() {
      Intent intent = new Intent(Intent.ACTION_GET_CONTENT); 
      intent.setType("*/*");
      intent.addCategory(Intent.CATEGORY_OPENABLE);
  
  
      try {
          startActivityForResult(
                  Intent.createChooser(intent, "Select txt file"),
                  FILE_SELECT_CODE);
      } catch (android.content.ActivityNotFoundException ex) {
          // Potentially direct the user to the Market with a Dialog
          Toast.makeText(this.getActivity(), "Please install a File Manager.", 
                  Toast.LENGTH_SHORT).show();
      }
  }
  
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
      switch (requestCode) {
      case FILE_SELECT_CODE:      
      if (resultCode == Activity.RESULT_OK) {  
          // Get the Uri of the selected file 
          Uri uri = data.getData();
          String path = uri.getPath();
          input = new File(path);
          try {
              txtParser = new TxtFileParser(input);
          } catch (FileNotFoundException e) {
              /* Exception handler must be here! */
          }
      }           
      break;
  }
      super.onActivityResult(requestCode, resultCode, data);
  }
  </code></pre>
  
  <p>I managed to do this. But I don't know how to define txt extensions.</p>