Question

我有一个按钮，可以打开AlertDialog。然后，它开始倒计时，并在对话框内刷新文本：

private void countDown(int cooldown) {
        countDownTimer = new CountDownTimer(cooldown, COOLDOWN_TIME_STEP_MILLIS) { //sec , steps

            public void onTick(long millisUntilFinished) {
                isTimerActive = false;
                if (mFingerprintText != null) {
                    updateDialogText("Awsome text count: " + millisUntilFinished / COOLDOWN_TIME_STEP_MILLIS + " segs", false);
                }
            }

            public void onFinish() {
                isTimerActive = false;
                if (mFingerprintText != null) {
                    updateDialogText("Awsome text count finished", false);
                }
            }
        }.start();
    }

但是，如果用户关闭拨号盘并再次打开它，我想在过去的时间内继续倒计时。我的意思是，如果我在13:00:00开始倒计时（计数1分钟），并且用户在13:00:15关闭，如果用户再次打开，例如在13:00:30，我想要继续计数，所以在这个时刻反击仍需要再计数30秒......

我尝试了一些不同的方法，但我没有实现它。

private void showTimerDialog(Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);

        View dialogView = LayoutInflater.from(context).inflate(R.layout.dialog_request_android_timer, null);
        builder.setView(dialogView);

        if (!isTimerActive) {
            mTimerText = (TextView) dialogView.findViewById(R.id.dialog_timer_text);
        }

        builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
            @Override
            public void onDismiss(DialogInterface dialog) {
                if (mActive) {
                    deactivate();
                }
            }
        });

        builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                mDialog.dismiss();
            }
        });

        builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                mDialog.dismiss();
            }
        });

        mDialog = builder.create();
        mDialog.setCanceledOnTouchOutside(false);
        mDialog.show();
    }

Answer 1

不要在本地创建Dialog对象。在Activity中创建一个全局变量。现在，您的对话框创建和解雇可以是我们或方法showTimerDialog

覆盖Dialog的AlertDialog.BUTTON_POSITIVE和AlertDialog.BUTTON_NEGATIVE .Call类方法来处理这些场景

public class StartRaceFrag extends Activity{
//Keep a global instance
private AlertDialog mDialog;
//Create a boolean to check if timer already started or not
private boolean isTimerstarted;

现在在方法创建对象并按下对话框

    private void showTimerDialog(Context context) {
      //Start timer based on this bool variable
      if(!isTimerstarted){
        isTimerstarted=true;
      }
      final AlertDialog.Builder dialog = new AlertDialog.Builder(context);
      View dialogView = LayoutInflater.from(context).inflate(R.layout.dialog_request_android_timer, null);

      builder.setView(dialogView);
      mDialog=builder.create();
      //Other dialog related statements
      //Override the Dialog Positive and Negative button and call other class methods to handle

现在基于这个bool变量，您可以修改方法来运行计时器

private void countDown(int cooldown) {
   if(isTimerstarted){
     // Your business logic
   }else{
     //Handle for else case
   }
}

如何在Dialog中倒计时，如果再次打开对话框，则恢复倒计时

1 个答案: