Java android如何在5分钟后删除alertdialog？

我想让alertdialog buddler消失，当用户在5分钟后没有点击任何按钮时自动发送短信。 我可以显示alterdialog buddler，但我不知道如何发送短信

这是我的密码。 请帮我改正一下

AlarmService_Servierce.java

public class AlarmService_Servierce extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
         final Calendar c = Calendar.getInstance();
        int mHour = c.get(Calendar.HOUR_OF_DAY);
        int mMinute = c.get(Calendar.MINUTE);
        int mSecond =c.get(Calendar.SECOND);        


         AlertDialog.Builder builder = new AlertDialog.Builder(context);


        builder.setTitle("NOTICE");
        builder.setIcon(R.drawable.notification_icon);
        builder.setMessage("notice message");
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
                //Do something
                dialog.dismiss();
            }
        });
        builder.setNegativeButton("Close", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                 dialog.dismiss();
            }
     });
        AlertDialog alert = builder.create();
        alert.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
        alert.show();

    }

}

MainActivity.java

    Intent intent = new Intent(MainActivity.this, AlarmService_Service.class);
    PendingIntent sender = PendingIntent.getBroadcast(MainActivity.this,
            0, intent, 0);


    long firstTime = SystemClock.elapsedRealtime();
    firstTime += 300*1000;      
    AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
        am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                    firstTime, 10*1000, sender);
      final Calendar c = Calendar.getInstance();
        int mHour = c.get(Calendar.HOUR_OF_DAY);
        int mMinute = c.get(Calendar.MINUTE);
        int mSecond =c.get(Calendar.SECOND);
    }
private void SendSMS(String phonenumber, String message) {
        SmsManager smsManager = SmsManager.getDefault();
        String sendTo = phonenumber;
        String myMessage = message;
        smsManager.sendTextMessage(sendTo, null, myMessage, null, null);

        finish();
    }

---

无论您希望在何处或计时器结束时关闭对话框，都可以使用“关闭”功能

警惕。解散（）

final AlertDialog.Builder dialog = new    AlertDialog.Builder(this).setTitle("Leaving launcher").setMessage("Are you sure you want to leave the launcher?");
 dialog.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
  @Override
public void onClick(DialogInterface dialog, int whichButton) {
    exitLauncher();
}
});     
final AlertDialog alert = dialog.create();
alert.show();

// Hide after some seconds
final Handler handler  = new Handler();
final Runnable runnable = new Runnable() {
@Override
public void run() {
    if (alert.isShowing()) {
        alert.dismiss();
    }
}
 };

alert.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
    handler.removeCallbacks(runnable);
}
  });

 handler.postDelayed(runnable, 10000);//replace your time