android 按钮点击事件

package com.example.a;import android.os.Bundle;import android.app.Activity;import android.util.Log;import android.view.Menu;import android.view.View;import android.view.Window;import android.widget.Button;public class MainActivity extends Activity {private Button m_bt1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        m_bt1 = (Button)findViewById(R.id.button1);                                      /*        m_bt1.setOnClickListener(new View.OnClickListener() {//new 实现了接口的类对象，是匿名内部类@Overridepublic void onClick(View v) {Log.i("tag", "hello");}});*/                m_bt1.setOnClickListener(new ButtonClickListener());                    }      private final class ButtonClickListener implements View.OnClickListener{     private final static String TAG = "ButtonClickListener";    @Overridepublic void onClick(View v) {// TODO Auto-generated method stubLog.i(TAG, "hello");}        }}

View.OnClickListener()是一个接口，如下

    public interface OnClickListener {        /**         * Called when a view has been clicked.         *         * @param v The view that was clicked.         */        void onClick(View v);    }

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