Question

我使用不同的文字创建多个通知。但是，AlarmManager始终显示具有相同文本的通知，如果未刷新旧通知，则替换旧通知。 NOTIFY_ID始终不同（已调试）。另外我发现如果在显示通知后我在onRecieve方法中崩溃应用它工作正常......这是代码：

public class Schedule extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "");
        wakeLock.acquire();

        //next is notification code. //

        //get res.
        SharedPreferences mPrefs = context.getSharedPreferences("appsettings", 0);

        String titleText = mPrefs.getString("titleText", "");
        String bigText = mPrefs.getString("bigText", "");
        int NOTIFY_ID = mPrefs.getInt("id", 0);

        //create intent.
        Intent notificationIntent = new Intent(context, MainActivity.class);
        PendingIntent contentIntent = PendingIntent.getActivity(context,
                0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT);

        //get res.
        Resources res = context.getResources();

        //build notification.
        Notification.Builder builder = new Notification.Builder(context)
                .setContentIntent(contentIntent)
                .setSmallIcon(R.drawable.statusbaricon)
                .setAutoCancel(true)
                .setContentTitle(titleText)
                .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
                .setContentText(bigText);


        //check vibration.
        if (mPrefs.getBoolean("vibration", true)) {
            builder.setVibrate(new long[] { 0, 50 });
        }

        //create default title if empty.
        if (titleText.length() == 0) {
            builder.setContentTitle(context.getString(R.string.notification_Title_Default));
        }

        //show notification. check for delay.
        builder.setWhen(System.currentTimeMillis());

        Notification notification = new Notification.BigTextStyle(builder)
                .bigText(bigText).build();

        NotificationManager notificationManager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(NOTIFY_ID, notification);

        ////
        wakeLock.release();
    }

    public void setAlarm(Context context) {

        SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(context);
        int delay = mPrefs.getInt("delay", 0);
        int id = mPrefs.getInt("id", 0);

        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, Schedule.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, id, intent, PendingIntent.FLAG_ONE_SHOT);
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() /* + 1000 * 60 * delay */, pendingIntent);
    }
}

这就是我所说的：

    //store stuff to revoke in Schedule.
    mPrefsEditor.putString("bigText", bigText).apply();
    mPrefsEditor.putString("titleText", titleText).apply();

    Schedule schedule = new Schedule();
    schedule.setAlarm(context);

Answer 1

对不同的requestCode使用不同的PendingIntent并使用标记FLAG_UPDATE_CURRENT。

PendingIntent contentIntent = PendingIntent.getActivity(context, requestCode, 
                              notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

1。从setAlarm()方法发送通知id，titleText和bigText广播receiver到{{1}并使用标记intent代替FLAG_UPDATE_CURRENT。

更新FLAG_ONE_SHOT方法，如下所示：

setAlarm()

2。在public void setAlarm(Context context) { SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(context); int delay = mPrefs.getInt("delay", 0); int id = mPrefs.getInt("id", 0); String titleText = mPrefs.getString("titleText", ""); String bigText = mPrefs.getString("bigText", ""); AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); // send notification id, titleText and bigText with intent // to use later when alarm triggers Intent intent = new Intent(context, Schedule.class); intent.putExtra("NOTIFICATION_ID", id); intent.putExtra("TITLE_TEXT", titleText); intent.putExtra("BIG_TEXT", bigText); PendingIntent pendingIntent = PendingIntent.getBroadcast(context, id, intent, PendingIntent.FLAG_UPDATE_CURRENT); alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() /* + 1000 * 60 * delay */, pendingIntent); }方法中，从onReceive()获取通知id，titleText和bigText。

3。使用[{1}}作为Intent id，并使用requestCode和contentIntent进行通知{{1} }。

更新titleText方法，如下所示：

bigText

希望这会有所帮助〜

Answer 2

这个PendingIntent.FLAG_CANCEL_CURRENT是你的问题。根据你想要做的事情，在你的代码中使用不同的标志，并按预期工作！

PendingIntent contentIntent = PendingIntent.getActivity(context,
                0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT);

例如：FLAG_ACTIVITY_SINGLE_TOP，FLAG_ACTIVITY_CLEAR_TOP，FLAG_ACTIVITY_NEW_TASK，......或者根本不使用任何标志（0）。

PendingIntent.FLAG_ONE_SHOT强制您的程序只使用pendingintent一次。请注意，使用不同setAlarm调用putString可能不会更改结果。

编辑：将这一行放在Schedule.java第33行和第34行。这会改变通知，但这不是一个好的解决方案，你应该用不同的变量字符串替换"something different" + bigText。

String titleText = mPrefs.getString("titleText", "");
String bigText = mPrefs.getString("bigText", "");
SharedPreferences.Editor mPrefsTextsEditor = getSharedPreferences("notifications", 0).edit();
bigText = "something different" + bigText;
titleText = "something different" + titleText;
mPrefsTextsEditor .putString("bigText", bigText).apply();
mPrefsTextsEditor .putString("titleText", titleText).apply();

Android：AlarmManager始终显示相同的通知

2 个答案: