使用动态文本更新 UI出现的问题

Question

我想每5秒钟更新一次屏幕上的文本，就创建了一个 timer 计时器来实现。但是只有第一次更新了，以后再没更新。是不是我需要刷新视图或者使用别的方法？

public class HomeActivity extends Activity implements OnClickListener {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textTitle = (TextView) findViewById(R.id.textTitle);
        textArtist = (TextView) findViewById(R.id.textArtist);
        timedMeta();
}
static void timedMeta()
{
    timer.scheduleAtFixedRate(   
        new TimerTask() {
            public void run() {
                try{      
                    textTitle.setText(title);
                    textArtist.setText(artist); 
                    }
                Thread.sleep(UPDATE_INTERVAL);
                catch (Exception e) 
                { 
                },
                DELAY_INTERVAL,
                UPDATE_INTERVAL);
           }
       }
   )
}

Answer 1

要使用一个 Handler.

private static final int WHAT = 1;
private static final int TIME_TO_WAIT = 5000;

Handler regularHandler = new Handler(new Handler.Callback() {
    public boolean handleMessage(Message msg) {
        // Do stuff

        regularHandler.sendEmptyMessageDelayed(msg.what, TIME_TO_WAIT);

        return true;
    }
});

regularHandler.sendEmptyMessageDelayed(WHAT, TIME_TO_WAIT);

onPause()

regularHandler.removeMessages(WHAT)