[英]How do you cancel CountDownTimer?
我有一個帶倒數計時器的AlertDialog,我有一個取消按鈕設置,取消對話但計時器繼續運行! 有誰知道如何取消倒數計時器的倒計時? 任何幫助,將不勝感激!
private void timerDialog() {
timerDialog = new AlertDialog.Builder(this).create();
timerDialog.setTitle("Timer");
timerDialog.setMessage("Seconds Remaining: "+timerNum*1000);
timerDialog.setCancelable(false);
timerDialog.setButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface aboutDialog, int id) {
timerDialog.cancel();
}
});
timerDialog.show();
new CountDownTimer(timerNum*1000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
timerDialog.setMessage("Seconds Remaining: "+ (millisUntilFinished/1000));
}
@Override
public void onFinish() {
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(500);
timerDialog.cancel();
}
}.start();
}
您似乎在對話框上調用取消,但從未在計時器上調用取消。 您需要維護對CountDownTimer的引用,並在onClick方法中調用其cancel方法。
private void timerDialog() {
final CountDownTimer timer = new CountDownTimer(timerNum*1000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
timerDialog.setMessage("Seconds Remaining: "+ (millisUntilFinished/1000));
}
@Override
public void onFinish() {
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(500);
timerDialog.cancel();
}
};
timerDialog = new AlertDialog.Builder(this).create();
timerDialog.setTitle("Timer");
timerDialog.setMessage("Seconds Remaining: "+timerNum*1000);
timerDialog.setCancelable(false);
timerDialog.setButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface aboutDialog, int id) {
timer.cancel();
}
});
timerDialog.show();
timer.start();
}
在CountDownTimer上調用cancel()
方法
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.