덧셈 계산기를 만들어 결과 값 toast하기 ... @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setTitle("Sum of two number"); edit1 = (EditText) findViewById(R.id.Edit1); edit2 = (EditText) findViewById(R.id.Edit2); btnAdd = (Button) findViewById(R.id.BtnAdd); btnAdd.setOnClickListener(new View.OnClickListener() { @Override pu..