文本视图设置文本不工作

Question

TextView textViewprompt2 = (TextView)findViewById(R.id.textView3);
    textViewprompt2.setText("There will be a series of 10 questions");
    TextView textViewprompt1 = (TextView)findViewById(R.id.textView4);
    textViewprompt1.setText("There will be a series of 10 questions");
    Thread.sleep(2000);
    TextView textViewcountdown1 = (TextView)findViewById(R.id.textView4);
    TextView textViewcountdown2 = (TextView)findViewById(R.id.textView3);
    textViewcountdown1.setText("3");
    textViewcountdown2.setText("3");
    Thread.sleep(1000);
    textViewcountdown1.setText("2");
    textViewcountdown2.setText("2");
    Thread.sleep(1000);
    textViewcountdown1.setText("1");
    textViewcountdown2.setText("1");
    Thread.sleep(1000);
    textViewcountdown1.setText("Go");
    textViewcountdown2.setText("Go");
    Thread.sleep(500);

为什么不工作它基本上跳过setText并且似乎只执行Thread.sleep（）行

Answer 1

我认为Thread.sleep()睡眠与setText()使用的线程相同，这就是TextViews不更新的原因。

我建议使用Timer（特别是CountDownTimer：http://developer.android.com/reference/android/os/CountDownTimer.html）来延迟更新TextView，而不是使用Thread.sleep。