如何在android中显示多个通知

时间：2013-08-07 11:20:38

标签： android notifications android-notifications

我只收到一个通知，如果有另一个通知，它会替换上一个通知，这是我的代码

private static void generateNotification(Context context, String message,
        String key) {
    int icon = R.drawable.ic_launcher;
    long when = System.currentTimeMillis();
    NotificationManager notificationManager = (NotificationManager) context
            .getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notification = new Notification(icon, message, when);

    String title = context.getString(R.string.app_name);

    Intent notificationIntent = new Intent(context,
            FragmentOpenActivity.class);
    notificationIntent.putExtra(key, key);
    // set intent so it does not start a new activity
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent intent = PendingIntent.getActivity(context, 0,
            notificationIntent, 0);
    notification.setLatestEventInfo(context, title, message, intent);
    notification.flags |= Notification.FLAG_AUTO_CANCEL;

    notification.defaults |= Notification.DEFAULT_SOUND;

    // notification.sound = Uri.parse("android.resource://" +
    // context.getPackageName() + "your_sound_file_name.mp3");
    notification.defaults |= Notification.DEFAULT_VIBRATE;
    notificationManager.notify(0, notification);

}

18 个答案:

答案 0 :(得分：114)

只需用这个

替换你的行 
 notificationManager.notify(Unique_Integer_Number, notification);
希望它会对你有所帮助。

答案 1 :(得分：70)

简单的notification_id需要改变。

只需为notification_id创建随机数。

    Random random = new Random();
    int m = random.nextInt(9999 - 1000) + 1000;

或者您可以使用此方法创建tieorange告知的随机数（这永远不会重复）：

    int m = (int) ((new Date().getTime() / 1000L) % Integer.MAX_VALUE);

并替换此行以添加通知ID的参数以生成随机数

    notificationManager.notify(m, notification);

答案 2 :(得分：27)

使用共享首选项为我工作

SharedPreferences prefs = getSharedPreferences(Activity.class.getSimpleName(), Context.MODE_PRIVATE);
int notificationNumber = prefs.getInt("notificationNumber", 0);
...

notificationManager.notify(notificationNumber , notification);
SharedPreferences.Editor editor = prefs.edit();
notificationNumber++;
editor.putInt("notificationNumber", notificationNumber);
editor.commit();

答案 3 :(得分：8)

用此替换你的行。

notificationManager.notify((int) ((new Date().getTime() / 1000L) % Integer.MAX_VALUE), notification);

答案 4 :(得分：8)

我想这会帮助别人..
在下面的代码＆＃34; not_nu＆＃34;是一个随机的int .. PendingIntent和Notification具有相同的ID ..所以在每个通知上点击意图将指向不同的活动.. 

private void sendNotification(String message,String title,JSONObject extras) throws JSONException {
   String id = extras.getString("actionParam");
    Log.e("gcm","id  = "+id);
    Intent intent = new Intent(this, OrderDetailActivty.class);
    intent.putExtra("id", id);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    final int not_nu=generateRandom();
    PendingIntent pendingIntent = PendingIntent.getActivity(this, not_nu /* Request code */, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.mipmap.ic_cart_red)
            .setContentTitle(title)
            .setContentText(message)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(not_nu /* ID of notification */, notificationBuilder.build());
}
public int generateRandom(){
    Random random = new Random();
    return random.nextInt(9999 - 1000) + 1000;
}

答案 5 :(得分：5)

在uniqueIntNo的地方放置如下的唯一整数：

mNotificationManager.notify(uniqueIntNo, builder.build());

答案 6 :(得分：3)

您需要为每个通知添加唯一ID，以便它们不会相互组合。您可以使用此链接作为参考：

https://github.com/sanathe06/AndroidGuide/tree/master/ExampleCompatNotificationBuilder

答案 7 :(得分：3)

另一种方法是将当前日期转换为long，只取最后4位数。该数字很可能是唯一的。

    long time = new Date().getTime();
    String tmpStr = String.valueOf(time);
    String last4Str = tmpStr.substring(tmpStr.length() -5);
    int notificationId = Integer.valueOf(last4Str);

答案 8 :(得分：3)

我解决了这个问题...... 

/**
     * Issues a notification to inform the user that server has sent a message.
     */
    private static void generateNotification(Context context, String message,
            String keys, String msgId, String branchId) {
        int icon = R.drawable.ic_launcher;
        long when = System.currentTimeMillis();
        NotificationCompat.Builder nBuilder;
        Uri alarmSound = RingtoneManager
                .getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        nBuilder = new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("Smart Share - " + keys)
                .setLights(Color.BLUE, 500, 500).setContentText(message)
                .setAutoCancel(true).setTicker("Notification from smartshare")
                .setVibrate(new long[] { 100, 250, 100, 250, 100, 250 })
                .setSound(alarmSound);
        String consumerid = null;
        Integer position = null;
        Intent resultIntent = null;
        if (consumerid != null) {
            if (msgId != null && !msgId.equalsIgnoreCase("")) {
                if (key != null && key.equalsIgnoreCase("Yo! Matter")) {
                    ViewYoDataBase db_yo = new ViewYoDataBase(context);
                    position = db_yo.getPosition(msgId);
                    if (position != null) {
                        resultIntent = new Intent(context,
                                YoDetailActivity.class);
                        resultIntent.putExtra("id", Integer.parseInt(msgId));
                        resultIntent.putExtra("position", position);
                        resultIntent.putExtra("notRefresh", "notRefresh");
                    } else {
                        resultIntent = new Intent(context,
                                FragmentChangeActivity.class);
                        resultIntent.putExtra(key, key);
                    }
                } else if (key != null && key.equalsIgnoreCase("Message")) {
                    resultIntent = new Intent(context,
                            FragmentChangeActivity.class);
                    resultIntent.putExtra(key, key);
                }.
.
.
.
.
.
            } else {
                resultIntent = new Intent(context, FragmentChangeActivity.class);
                resultIntent.putExtra(key, key);
            }
        } else {
            resultIntent = new Intent(context, MainLoginSignUpActivity.class);
        }
        PendingIntent resultPendingIntent = PendingIntent.getActivity(context,
                notify_no, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        if (notify_no < 9) {
            notify_no = notify_no + 1;
        } else {
            notify_no = 0;
        }
        nBuilder.setContentIntent(resultPendingIntent);
        NotificationManager nNotifyMgr = (NotificationManager) context
                .getSystemService(context.NOTIFICATION_SERVICE);
        nNotifyMgr.notify(notify_no + 2, nBuilder.build());
    }

答案 9 :(得分：0)

以下是传递唯一通知ID的代码：

//"CommonUtilities.getValudeFromOreference" is the method created by me to get value from savedPreferences.
String notificationId = CommonUtilities.getValueFromPreference(context, Global.NOTIFICATION_ID, "0");
int notificationIdinInt = Integer.parseInt(notificationId);

notificationManager.notify(notificationIdinInt, notification);

// will increment notification id for uniqueness
notificationIdinInt = notificationIdinInt + 1;
CommonUtilities.saveValueToPreference(context, Global.NOTIFICATION_ID, notificationIdinInt + "");
//Above "CommonUtilities.saveValueToPreference" is the method created by me to save new value in savePreferences.

重置特定范围的savedPreferences中的notificationId，就像我在1000处所做的那样。因此将来不会产生任何问题。 如果您需要更多详细信息或任何查询，请与我们联系。 ：）

答案 10 :(得分：0)

问题在于您的notificationId。将其视为数组索引。每次更新通知时，notificationId都是存储值所需的位置。由于您没有递增int值（在本例中为notificationId），因此总是替换前一个值。我想最好的解决方案是在更新通知后立即增加它。如果您想保持持久性，那么您可以将notificationId的值存储在sharedPreferences中。每当你回来时，你只需抓住最后一个整数值（notificationId中存储的sharedPreferences）并使用它。

答案 11 :(得分：0)

在代码中使用以下方法。

方法调用： - 

notificationManager.notify(getCurrentNotificationId(getApplicationContext()), notification);

方法： - 

  *Returns a unique notification id.
         */

        public static int getCurrentNotificationId(Context iContext){

            NOTIFICATION_ID_UPPER_LIMIT = 30000; // Arbitrary number.

            NOTIFICATION_ID_LOWER_LIMIT = 0;
            SharedPreferences sharedPreferences       = PreferenceManager.getDefaultSharedPreferences(iContext);
        int previousTokenId                       = sharedPreferences.getInt("currentNotificationTokenId", 0);

        int currentTokenId                        = previousTokenId+1;

        SharedPreferences.Editor editor           = sharedPreferences.edit();

        if(currentTokenId<NOTIFICATION_ID_UPPER_LIMIT) {

            editor.putInt("currentNotificationTokenId", currentTokenId); // }
        }else{
            //If reaches the limit reset to lower limit..
            editor.putInt("currentNotificationTokenId", NOTIFICATION_ID_LOWER_LIMIT);
        }

        editor.commit();

        return currentTokenId;
    }

答案 12 :(得分：0)

notificationManager.notify(0, notification);
putthis new Random().nextInt() in position of 0
like below it works for me
notificationManager.notify(new Random().nextInt(), notification);

答案 13 :(得分：0)

您只需要将单行从DataGridTextColumn更改为private static bool CanEditCell(DataGridCell cell) { if (!(cell.Column is DataGridTemplateColumn col)) return false; //TemplateColumns only //dont process noneditable or already editing cell return !(cell.IsEditing || cell.IsReadOnly); } private static void DataGrid_PreviewTextInput(object sender, TextCompositionEventArgs e) { //ignore non-key input related events, e.g. ctrl+c/ctrl+v if (string.IsNullOrEmpty(e.Text)) return; if (e.Source is DataGrid dg && e.OriginalSource is DataGridCell cell && CanEditCell(cell)) { dg.BeginEdit(); //custom extension method, see var tb = cell.GetVisualChild<TextBox>(); tb?.Focus(); //route current event into the input control tb?.SelectAll(); //overwrite contents } } ...

这将在新的通知出现时更改通知的ID

答案 14 :(得分：0)

对于Kotlin。 

 notificationManager.notify(Calendar.getInstance().timeInMillis.toInt(),notificationBuilder.build())

答案 15 :(得分：-1)

一个简单的计数器可以解决您的问题。 

private Integer notificationId = 0;

private Integer incrementNotificationId() {
   return notificationId++;
}

NotificationManager.notify(incrementNotificationId, notification);

答案 16 :(得分：-1)

declare class member
static int i = 0;

mNotificationManager.notify(++i, mBuilder.build());

答案 17 :(得分：-1)

val notifyIdLong = ((Date().time / 1000L) % Integer.MAX_VALUE)
var notifyIdInteger = notifyIdLong.toInt()
if (notifyIdInteger < 0) notifyIdInteger = -1  * notifyIdInteger // if it's -ve change to positive
notificationManager.notify(notifyIdInteger, mBuilder.build())
log.d(TAG,"notifyId = $notifyIdInteger")
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