---

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void onButtonClick(View view) {
        EditText el1 = (EditText)findViewById(R.id.Num1);
        EditText el2 = (EditText)findViewById(R.id.Num2);
        TextView resText = (TextView)findViewById(R.id.Result);

        int num1 = Integer.parseInt(el1.getText().toString());
        int num2 = Integer.parseInt(el2.getText().toString());
        int resSum = num1 + num2;
        resText.setText(Integer.toString(resSum));
    }
}