安卓：从一个线程更新UI定期 [英] Android: Update UI periodically from a thread

问题描述

猜猜我有，我想在某些情况下更新它一个TextView。我想有每个一两秒钟检查的情况和更新，如果有必要的TextView的文本中的线程。
任何想法？

Guess that I have a TextView that I want to update it in some situations. I want to have a thread that every one or two seconds checks the circumstances and updates TextView's text if necessary. Any Idea?

推荐答案

您可以使用处理程序，在你的GUI：

You can use Handler, in your GUI:

Handler hnd = new Handler() {
    public void handleMessage(Message msg) {
        if ( msg.what == 101 ) {
           //update textview
        }
    }
}

通HND你的线程，并在你的线程做的：

pass hnd to your thread, and in your thread do:

Message m = new Message();
m.what = 101;
hnd.sendMessage(m);

这是假定在单独的线程你正在做的，需要GUI线程汇报一些工作，也可以发短信

this assumes that in your separate thread you are doing some work that needs reporting to GUI thread, you can also send text messages

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