private void open(String fileString) {  Intent intent = new Intent();  intent.setClassName("com.rarlab.rar", "com.rarlab.rar.MainActivity");  File file = new File(fileString);  Uri data = Uri.fromFile(file);  intent.setData(data);  try {   startActivity(intent);  } catch (ActivityNotFoundException e) {   try {    Uri uri = Uri.parse("market://search?q=" + "rar");    Intent it = new Intent(Intent.ACTION_VIEW, uri);    startActivity(it);   } catch (ActivityNotFoundException e2) {    Log.i(TAG, "market no found");   }  } }