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intent.putExtra("Num1", Integer.parseInt(edtNum1.getText().toString()));
intent.putExtra("Num2", Integer.parseInt(edtNum2.getText().toString()));
startActivityForResult(intent, 0);

}
});


}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
int hap = data.getIntExtra("result", 0);
Toast.makeText(getApplicationContext(), "계산결과 :" + hap, Toast.LENGTH_SHORT).show();
}
}
}