@Override
public void onConfigurationChanged(Configuration newConfig) {
  super.onConfigurationChanged(newConfig);
  if(newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {

    ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE))
                                  .showInputMethodPicker();
    Toast.makeText(this, "Barcode Scanner detected. Please turn OFF Hardware/Physical keyboard to enable softkeyboard to function.", Toast.LENGTH_LONG).show();
  }
}

InputMethodManager imm = (InputMethodManager)getContext().getSystemService(
                                              Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);

((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);

((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(_pay_box_helper.getWindowToken(), 0);