1效果图
(1)在FirstActivity.java中
Button button1 = (Button) findViewById(R.id.button_1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast .makeText(FirstActivity .this, "you click the button 1", Toast.LENGTH_SHORT).show();
}
});