button点击事件

  protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        Button button=(Button)findViewById(R.id.button1);
        button.setOnClickListener(new ShowListener()) ;
    }

    class ShowListener implements OnClickListener {    
        public void onClick(View v) {
            TextView tv1=(TextView)findViewById(R.id.textView2);
            String info = tv1.getText().toString() ;
            Button button=(Button)findViewById(R.id.button1);
            button.setText("输入的内容是：" + info) ;     
        }
    }