Button button = (Button)this.findViewById(R.id.button);  
button.setOnClickListener(newButton.OnClickListener() {  
  //回调函数  
  @override  
  publicvoidonClick(View v) {  
   buttonTextView.setText("按钮被点击了");  
  }  
});  

@Override  
publicvoidonCreate(BundlesaveInstanceState) {  
  super.onCreate(saveInstanceState);  
  // You code...  
}  
@Override  
publicvoidonResume() {  
  super.onResume();  
  // You code...  
}  

package lin.callback.test; 
  
public class You implements Runnable{ 
  
    
  private String who; 
   private ContactInterface callBack;  
   public You() { 
      // TODO Auto-generated constructor stub 
   } 
    
  //调用此方法就表示有人联系你了，注册到你这来 
   public void setCallBack(String who,String question,ContactInterface callBack) { 
     this.who = who;   
     System.out.println("你说：当前联系到我的人是"+who+"，问题是"+question); 
     this.callBack =callBack; 
   } 
     
   public void handleThings(){ 
     //假如你现在正在想问题的答案，需要一点时间 
     for(int i=0;i<100000;i++){  
        if(i == 0){ 
          System.out.println("你正在思考问题....."); 
        } 
     } 
      
     String answer = "答案是A"; 
     //想到问题的办法了 
     System.out.println("你说：想到答案了，准备打回去给"+who+"告诉他答案"); 
     callBack.callBackByTel(answer); 
   } 
  
  /* (non-Javadoc) 
   * @see java.lang.Runnable#run() 
   */ 
  @Override 
  public void run() { 
    try { 
      Thread.sleep(1000); 
      handleThings(); 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
  }  
} 

public class Me { 
  
   public static void main(String[] args){  
      
     Me me = new Me(); 
     me.hasQuestion(); 
      
   } 
    
   private void hasQuestion(){ 
     //现在有问题想不出来答案，想去问你 
     You you = new You(); 
     you.setCallBack("蜗牛", "某道题答案是什么？", new ContactInterface() { 
        
      @Override 
      public void callBackByTel(String answer) { 
        System.out.println("我说：嗯，好的，我收到答案了:"+answer+"，谢谢"); 
          
      } 
    }); 
    //你接到电话，起床开始思考问题 
    new Thread(you).start(); 
   } 
} 

public interface ContactInterface { 
    
  public void callBackByTel(String answer); 
    
}