【1】MainActivity监听器使用

package com.zhonghphuan.firstprj;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class MainActivity extends Activity {

private Button button; //声明按钮对象

private TextView textview; //声明文本对象

int count=0;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

textview=(TextView)findViewById(R.id.textview);//获取布局文件textview的id

button=(Button)findViewById(R.id.button);//获取布局文件 button的id

ButtonListener buttonListener= new ButtonListener();

button.setOnClickListener(buttonListener); //绑定监听器对象

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

class ButtonListener implements OnClickListener{ //定义监听器类

@Override

public void onClick(View v) { //监听器接口

// TODO Auto-generated method stub

count++;

textview.setText(count + "");

}

}

}