Android(安卓)学习笔记--android――AsyncTask在Android4.X的机制问题

AsyncTask在Android4.X的机制问题

AsyncTask在Android4.X机制是串行的...单一AsyncTask运行完才会运行下一个

AsyncTask在Android2.3机制是并行的..最多支持5个

解决AsyncTask 在4.x串行的问题...自己编写线程池

public class PoolThread {
private static final int CPU_COUNT = Runtime.getRuntime()
.availableProcessors();
private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 10 + 1;
private static final int KEEP_ALIVE = 1;
private static final BlockingQueue<Runnable> sPoolWorkQueue = new LinkedBlockingQueue<Runnable>(
128);
private static final ThreadFactory sThreadFactory = new ThreadFactory() {
private final AtomicInteger mCount = new AtomicInteger(1);

public Thread newThread(Runnable r) {
return new Thread(r, "AsyncTask #" + mCount.getAndIncrement());
}
};
public static final Executor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(
CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE, TimeUnit.SECONDS,
sPoolWorkQueue, sThreadFactory);

}

启动 AsyncTask的时候 reTask.executeOnExecutor(PoolThread.THREAD_POOL_EXECUTOR,params...)

就可以并行咯..

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