我制作了一个简单的应用程序，可以在用户必须检查时通知用户。
我设法以正确的延迟发送通知，但我也希望用户能够在延迟之间的某处关闭通知'束'（通过交换机）。 我想用Handler.removeCallBacks做这件事，但它没有完成这项工作。
final Switch mySwitch = (Switch) findViewById(R.id.theswitch);
mySwitch.setChecked(myPrefs.getBoolean("switch", false));
//attach a listener to check for changes in state
mySwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
final boolean isChecked) {
editor.putBoolean("switch", isChecked);
editor.commit();
if (isChecked) {
//switch has been switched ON
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT+1:00"));
Date currentLocalTime = cal.getTime();
DateFormat date = new SimpleDateFormat("HH:mm");
// you can get seconds by adding "...:ss" to it
date.setTimeZone(TimeZone.getTimeZone("GMT+1:00"));
String localTime = date.format(currentLocalTime);
Log.w(localTime, "1");
if (localTime.equals("08:50") || localTime.equals("08:51") || localTime.equals("08:52") || localTime.equals("08:53") || localTime.equals("08:54") || localTime.equals("08:55") || localTime.equals("08:56")
|| localTime.equals("08:57") || localTime.equals("08:58") || localTime.equals("08:59") || localTime.equals("09:00") || localTime.equals("09:01") || localTime.equals("09:02") || localTime.equals("09:03")
|| localTime.equals("09:04") || localTime.equals("09:05") || localTime.equals("09:06") || localTime.equals("09:07") || localTime.equals("09:08") || localTime.equals("09:09") || localTime.equals("09:10")
|| localTime.equals("09:11") || localTime.equals("09:12") || localTime.equals("09:13") || localTime.equals("09:14") || localTime.equals("09:15") || localTime.equals("09:16") || localTime.equals("09:17")
|| localTime.equals("09:18") || localTime.equals("09:19") || localTime.equals("09:20") || localTime.equals("09:21") || localTime.equals("09:22") || localTime.equals("09:23") || localTime.equals("09:24")
|| localTime.equals("09:25") || localTime.equals("09:26") || localTime.equals("09:27") || localTime.equals("09:28") || localTime.equals("09:29") || localTime.equals("09:30") || localTime.equals("09:31")
|| localTime.equals("09:32") || localTime.equals("09:33") || localTime.equals("09:34") || localTime.equals("09:35") || localTime.equals("09:36") || localTime.equals("09:37") || localTime.equals("09:38")
|| localTime.equals("09:39") || localTime.equals("09:40") || localTime.equals("09:41") || localTime.equals("09:42") || localTime.equals("09:43") || localTime.equals("09:44") || localTime.equals("09:45")
|| localTime.equals("09:46") || localTime.equals("09:47") || localTime.equals("09:48") || localTime.equals("09:49") || localTime.equals("09:50") || localTime.equals("09:51") || localTime.equals("09:52")
|| localTime.equals("09:53") || localTime.equals("09:54") || localTime.equals("09:55") || localTime.equals("09:56") || localTime.equals("09:57") || localTime.equals("09:58") || localTime.equals("09:59")
|| localTime.equals("10:00") || localTime.equals("10:01") || localTime.equals("10:02") || localTime.equals("10:03") || localTime.equals("10:04") || localTime.equals("10:05") || localTime.equals("10:06")
|| localTime.equals("10:07") || localTime.equals("10:08") || localTime.equals("10:09") || localTime.equals("10:10") || localTime.equals("14:16")) {
Log.w("It is between", "those times");
boolean beenfired2 = myPrefs.getBoolean("beenfired", false);
if (beenfired2 != true) {
Log.w("yes", "it is not equal to true");
// day 1
mHandler.postDelayed(mClickRunnable, 36000);
mHandler.postDelayed(mClickRunnable, 72000);
beenfired = true;
editor.putBoolean("beenfired", beenfired);
editor.commit();
} else {
Log.w("else", "else");
}
} else {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(Inlopen.this);
// set title
alertDialogBuilder.setTitle("Alarm kan niet worden ingeschakeld");
// set dialog message
alertDialogBuilder
.setMessage("U kunt het alarm alleen inschakelen tussen 9:00 en 10:00 's ochtends.")
.setCancelable(false)
.setNegativeButton("Oke", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, just close
// the dialog box and do nothing
mySwitch.setChecked(false);
editor.putBoolean("switch", false);
editor.commit();
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
} else {
//switch has been switched OFF
beenfired = false;
mHandler.removeCallbacks(mClickRunnable);
editor.putBoolean("beenfired", beenfired);
editor.commit();
editor.putBoolean("switch", false);
editor.commit();
}
}
});
}
private Handler mHandler = new Handler();
private Runnable mClickRunnable = new Runnable() {
@Override
public void run() {
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(Inlopen.this)
.setSmallIcon(R.drawable.iconsmall)
.setContentTitle("DM Voet App")
.setContentText("Uw moet uw voeten controleren!");
mBuilder.setAutoCancel(true);
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
mBuilder.setSound(alarmSound);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1, mBuilder.build());
}
};
答案 0 :(得分：0)
我在停止处理程序时始终将这两种方法结合起来：
mHandler.removeCallbacks(mClickRunnable);
mHandler.removeMessages(0);
说实话，我真的不明白它们之间的区别，但它对我有用。 （如果我删除其中任何一个，它将无法工作）