本文實例講述了Android編程自定義線程池與用法。分享給大家供大家參考,具體如下:
一、概述:
1、因為線程池是固定不變的,所以使用了單例模式
2、定義了兩個線程池,長的與短的,分別用于不同的地方。因為使用了單例模式,所以定義兩個。
3、定義了兩個方法,執行的與取消的
二、代碼:
/** * @描述 線程管理池 * @項目名稱 App_Shop * @包名 com.android.shop.manager * @類名 ThreadManager * @author chenlin * @date 2014年3月29日 下午10:17:06 */public class ThreadManager { private ThreadManager(){}; private static ThreadManager instance= new ThreadManager(); private ThreadPoolProxy longPoolProxy; private ThreadPoolProxy shortPoolProxy; public static ThreadManager getInstance(){ return instance; } /** * 長線程池 * @return */ public synchronized ThreadPoolProxy createLongPool(){ if (longPoolProxy == null) { //(int corePoolSize 線程池大小, int maximumPoolSize 最大值, long keepAliveTime 存活時間) longPoolProxy = new ThreadPoolProxy(5, 5, 5000); } return longPoolProxy; } /** * 短線程池 * @return */ public synchronized ThreadPoolProxy createShortPool(){ if (shortPoolProxy == null) { shortPoolProxy = new ThreadPoolProxy(3, 3, 5000); } return shortPoolProxy; } public class ThreadPoolProxy{ private ThreadPoolExecutor pool; private int corePoolSize; //線程數 private int maximumPoolSize; //線程滿了后額外開的線程窗口 private long keepAliveTime;//沒有線程執行時存活時間 public ThreadPoolProxy(int corePoolSize,int maximumPoolSize, long keepAliveTime){ this.corePoolSize = corePoolSize; this.maximumPoolSize = maximumPoolSize; this.keepAliveTime = keepAliveTime; } /** * 執行線程 * @param runnable */ public void execute(Runnable runnable){ if (pool == null) { //最多可有多少個線程排隊 BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(10); pool = new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, TimeUnit.MILLISECONDS, workQueue); } pool.execute(runnable); } /** * 取消線程 * @param runnable */ public void cancel(Runnable runnable){ if (pool != null) { pool.remove(runnable); } } }}三、使用方法:
ThreadManager.getInstance().createLongPool().execute(new Runnable() { @Override public void run() { //SystemClock.sleep(2000); final LoadResult result = loadFromServer(); if (result != null) { Util.runOnUiThread(new Runnable() { @Override public void run() { currentState = result.getValue(); showPages(); } }); } }});希望本文所述對大家Android程序設計有所幫助。
新聞熱點
疑難解答