Android 创建线程执行任务

最新推荐文章于 2024-04-24 23:11:07 发布

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本文介绍了一个用于Android应用的通用后台线程类CommonWorkingThread，该类使用HandlerThread进行后台任务处理，并提供了执行任务的方法。通过该类可以在指定延迟后执行任务。

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一、新建CommonWorkingThread类，如下：

import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;

public class CommonWorkingThread {

	private static HandlerThread thread = null;

	private static Handler handler = null;

	private CommonWorkingThread() {
	}

	public static class CommonWorkingThreadHolder {
		public static CommonWorkingThread instance = new CommonWorkingThread();
	}

	public static CommonWorkingThread getInstance() {
		initHandler();
		return CommonWorkingThreadHolder.instance;
	}

	public boolean execute(Runnable r) {
		if (handler != null) {
			Log.i("CommonWorkingThread", ">>> working thread execute ");
			return handler.post(r);
		}
		return false;

	}

	public boolean execute(Runnable r, long delayMillis) {
		if (handler != null) {
			Log.i("CommonWorkingThread",
					">>> working thread execute delayMillis " + delayMillis);
			return handler.postDelayed(r, delayMillis);
		}
		return false;
	}

	public Handler getHandler() {
		return handler;
	}

	private static void initHandler() {
		if (thread == null || !thread.isAlive() || thread.isInterrupted()
				|| thread.getState() == Thread.State.TERMINATED) {
			thread = new HandlerThread("tpush.working.thread");
			thread.start();
			handler = new Handler(thread.getLooper());
			Log.i("CommonWorkingThread", ">>> Create new working thread."
					+ thread.getId());
		}
	}

}

二、在需要用到的地方按如下调用方式调用：

		CommonWorkingThread.getInstance().execute(new Runnable() {
			@Override
			public void run() {
				//在此执行具体任务
			}
		}, 100L); // 100L位delay执行的时间