Android---回调机制小例子

package com.hlj.huidiao;

public class HuidiaoUtil {
public void huidiao(final huidiaoCallback huiCallback){

new Thread(){
@Override
public void run() {
super.run();
while (true) {

huiCallback.hui("huidiao====");
try {
sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}.start();
}

/**
* 回调接口
* @author Administrator
*
*/
public interface huidiaoCallback {
public void hui(String str);
}
}

package com.hlj.huidiao;

import android.app.Activity;
import android.os.Bundle;
/**
* 回调activity类
* @author Administrator
*
*/
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

HuidiaoUtil huidiaoUtil = new HuidiaoUtil();
huidiaoUtil.huidiao(new HuidiaoUtil.huidiaoCallback() {

@Override
public void hui(String str) {
System.out.println(str);
}
});
}
}