我試圖做一個應用程序,每分鐘更改UI,但我與postAtTime函數掙扎很多,因爲我不能讓它觸發。我試過用postDelay它可以工作,但postAtTime應該給我更多的精度。postAtTime沒有觸發
我得到當前時間並設置日曆,然後在日期中添加一分鐘並調用postAtTime,但它不會觸發。讓我們看看你能否幫助我。
private Runnable showMinute = new Runnable() {
public void run() {
calendar = Calendar.getInstance();
minute = calendar.get(Calendar.MINUTE);
minute = minute % 10;
switch (minute){
case 0: numero.setImageResource(R.drawable.b0);
break;
case 1: numero.setImageResource(R.drawable.b1);
break;
case 2: numero.setImageResource(R.drawable.b2);
break;
case 3: numero.setImageResource(R.drawable.b3);
break;
case 4: numero.setImageResource(R.drawable.b4);
break;
case 5: numero.setImageResource(R.drawable.b5);
break;
case 6: numero.setImageResource(R.drawable.b6);
break;
case 7: numero.setImageResource(R.drawable.b7);
break;
case 8: numero.setImageResource(R.drawable.b8);
break;
case 9: numero.setImageResource(R.drawable.b9);
break;
default:
break;
}
handler.removeCallbacks(mostrarHora);
calendar.add(Calendar.MINUTE, 1);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
handler.postAtTime(showMinute, calendar.getTimeInMillis());
}
};
謝謝!自啓動以來,不知道handler.postAtTime使用了ms。但是,在那裏,有什麼辦法可以讓某些事情在確切的時間觸發(例如12:30)? – Nemesis