android_社交软件4_按钮事件

package com.lzy.ButtonTestR;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
    public Button btn1=null;
    public Button btn2=null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn2=(Button)findViewById(R.id.button2);
        btn2.setOnClickListener(listener);
        btn1=(Button)findViewById(R.id.button1);
        btn1.setOnClickListener(listener);
       
        
    }
    private OnClickListener listener =new OnClickListener()
 {
  
  @Override
  public void onClick(View v)
  {
   // TODO Auto-generated method stub
   Button btn=(Button)v;
   switch (btn.getId())
   {
    case R.id.button1:
     Toast.makeText(MainActivity.this, "按钮1被单击", Toast.LENGTH_LONG).show();
     break;
    case R.id.button2:
     Toast.makeText(MainActivity.this, "按钮2被单击", Toast.LENGTH_LONG).show();
     break;
    default:
     break;
   }
   
  }
 };
}