Android HandlerThread 完全解析

源码分析：

public class HandlerThread extends Thread {

    int mPriority;
    int mTid = -1;
    Looper mLooper;

    public HandlerThread(String name) {
        super(name);
        mPriority = Process.THREAD_PRIORITY_DEFAULT;
    }

总结：里面做了线程优先级的处理，主要是封装了looper，不用自己调用Looper的方法

场景：用于做完一件事，做另外一件事。

列子：用于下载应用，恢复下载的状态，handler.post()运作在工作线程中

private HandlerThread mHandlerThread = new HandlerThread("DownloadManager");

private DownloadManager(Context context) {
    this.mContext = context.getApplicationContext();
    downloadDbHelper = DownloadDbHelper.getInstance(context);
    ApkHelper.getInstance(mContext).registListener(this);
    mHandlerThread.start();
    mHandler = new Handler(mHandlerThread.getLooper());
}

/** 初始化下载列表 */
    public void initDownloadTasks() {
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                synchronized (TAG) {
                    if (!isInitFinish.get()) {
                        long startTime = System.currentTimeMillis();
                        List<DownloadTask<BaseFileModel>> all = downloadDbHelper.queryAll();
                        downloadTasks.clear();
                        downloadTasks.addAll(all);
                        restoreState();
                        delFailureTimeTask();
                        isInitFinish.set(true);
                        CXLog.d(TAG, "use time---->" + (System.currentTimeMillis() - startTime));
                        CXLog.d(TAG, "download size--->" + downloadTasks.size());
                        //更多页面的游戏插件预下载
//                        downLoadGameAppAll(mContext, instance);
                    }
                }

            }
        });

    }