Open numeric keyboard on Android

Thanks for your replies,
I read the return of editText by

if(editText.getText().toString().equals("XXXXX"))
I put the editText declaration in second folder so i  use it in first folder by
 runOnUiThread(new Runnable() {
      void run() {
     editText(40, 40, 640, 100, WHITE, BLACK, 28);
    }
  }
  );
 editText.setVisibility(View.INVISIBLE); 

at startup and visible when needed.

It works fine, but seems complicated by comparaison to traditionnal C language.