ButtonDemo_OnClick_2

public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn1 = (Button) findViewById(R.id.btn1);
         
        btn1.setOnClickListener(new ButtonClick);
         
    }
class ButtonClick implements View.OnClickListener
{
    public void OnClick(View v)
       {
            system.out.println("你点击了按钮1");
       }
}