01.public void onCreate(Bundle savedInstanceState) {
02.super.onCreate(savedInstanceState);
03.setContentView(R.layout.main);
04.}
05.public void click (View v){
06.
07.TextView textView1 = (TextView) findViewById(R.id.textView1);
08.
09.switch(v.getId()){
10.case R.id.imageView1:
11.textView1.append("1");
12.break;
13.case R.id.imageView2:
14.textView1.append("2");
15.break;
16.case R.id.imageView3:
17.textView1.append("3");
18.break;
19.case R.id.imageView4:
20.textView1.append("+");
21.break;
22.}
