小编Jen*_*ens的帖子

我有一个小的Android应用程序,我需要每隔几秒钟做一些FTP的东西.在学习了很难在UI线程上运行网络内容的东西是Android不喜欢的东西后,我来到这个解决方案:

// This class gets declared inside my Activity
private class CheckFtpTask extends AsyncTask<Void, Void, Void> {
    protected Void doInBackground(Void... dummy) {
        Thread.currentThread().setName("CheckFtpTask");
        // Here I'll do the FTP stuff       
        ftpStuff();
        return null;
    }
}

// Member variables inside my activity
private Handler checkFtpHandler;
private Runnable checkFtpRunnable;

// I set up the task later in some of my Activitiy's method:
checkFtpHandler = new Handler();
checkFtpRunnable = new Runnable() {
    @Override
    public void run() {
        new CheckFtpTask().execute((Void[])null);
        checkFtpHandler.postDelayed(checkFtpRunnable, 5000);
    }
}; …