原文地址:http://my.oschina.net/reone/blog/710003

?

多謝touch_ping?的回應. ?原來api有這個類 ?android.os.CountDownTimer?, 具體實現很下面的差不多.

import android.content.Context;
import android.os.Handler;/*** Created by wangxingsheng on 16/7/11.*/public class CalculatorUtil {private Context mContext;public CalculatorUtil(Context context){mContext = context;}public void startTimer(final int delay,final OnOverListener listener){final Handler handler = new Handler(mContext.getMainLooper());Runnable runnable = new Runnable(){private int count = 0;@Overridepublic void run() {count++;if(count < delay){listener.onTick(delay - count);handler.postDelayed(this,1000);}else{listener.onOver();}}};handler.post(runnable);}public interface OnOverListener{void onOver();//數字跳到0時調用此方法void onTick(int tick);//第一次調用為總數 - 1,最后一次調用是1}
}

這段程序可能存在問題(例如handler生命周期丶線程繼續運行等因素導致的問題),因為用途簡單 沒有深究.歡迎提出問題

上面的代碼沒有停止功能,下面是改善之后的代碼.

import android.content.Context;
import android.os.Handler;/*** Created by wangxingsheng on 16/7/11.*/public class CalculatorUtil {private Context mContext;private boolean requestStop;private Handler handler;private int mDelay;private OnOverListener mListener;public CalculatorUtil(Context context,int delay,OnOverListener listener){mContext = context;handler = new Handler(mContext.getMainLooper());mDelay = delay;mListener = listener;}public void startTimer(){requestStop = false;handler.post(runnable);}private  Runnable runnable = new Runnable(){private int count = 0;@Overridepublic void run() {if(requestStop){return;}count++;if(count < mDelay){mListener.onTick(mDelay - count);handler.postDelayed(runnable,1000);}else{mListener.onOver();}}};public void stopTimer(){requestStop = true;handler.removeCallbacks(runnable);}public interface OnOverListener{void onOver();//數字跳到0時調用此方法void onTick(int tick);//第一次調用為總數 - 1,最后一次調用是1}
}

本博客原地址:http://my.oschina.net/reone/blog/710003