如何对像whatsapp这样的android通知进行分组？

Question

我不知道如何将两个或多个通知组合成一个并显示“您有两条新消息”之类的消息。

Answer 1

您可以使用 setGroup 方法将所有通知堆叠到一个组中，并将您的 groupId 字符串作为参数传递。

builer.setGroup("组 ID 字符串") ;

NotificationManager nManager = (NotificationManager) 
getSystemService(NOTIFICATION_SERVICE);
Notification.Builder builder = new Notification.Builder(this);            
builder.setContentTitle("Lanes");
builder.setGroup("GROUP_ID_STRING");
builder.setContentText("Notification from Lanes"+value);
builder.setSmallIcon(R.drawable.ic_launcher);
builder.setLargeIcon(bitmap);
builder.setAutoCancel(true);
inboxStyle.setBigContentTitle("Enter Content Text");
inboxStyle.addLine("hi events "+value);
builder.setStyle(inboxStyle);
nManager.notify("App Name",NOTIFICATION_ID,builder.build());

Answer 2

以下代码中需要注意的步骤。

NotificationCompat.Builder:contains the UI specification and action information
NotificationCompat.Builder.build() :used to create notification (Which returns Notification object)
Notification.InboxStyle: used to group the notifications belongs to same ID
NotificationManager.notify():to issue the notification.

使用以下代码创建通知并将其分组。在按钮单击中包含该功能。

private final int NOTIFICATION_ID = 237;
private static int value = 0;
Notification.InboxStyle inboxStyle = new Notification.InboxStyle();
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.push_notify_icon);
public void buttonClicked(View v)
{
        value ++;
        if(v.getId() == R.id.btnCreateNotify){
            NotificationManager nManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            Notification.Builder builder = new Notification.Builder(this);            
            builder.setContentTitle("Lanes");
            builder.setContentText("Notification from Lanes"+value);
            builder.setSmallIcon(R.drawable.ic_launcher);
            builder.setLargeIcon(bitmap);
            builder.setAutoCancel(true);
            inboxStyle.setBigContentTitle("Enter Content Text");
            inboxStyle.addLine("hi events "+value);
            builder.setStyle(inboxStyle);
            nManager.notify("App Name",NOTIFICATION_ID,builder.build());
        }
}

对于单独的通知，分配不同的 NOTIFICATION_ID..

Answer 3

对于完整的逻辑，请考虑检查我的答案。我使用了具有共享偏好和广播接收器的逻辑，因为我需要将每个用户消息分组为单个消息并查看活动通知。仅通过定位 api 级别 23 你可以得到主动通知，它根本没有帮助我。所以我决定写一些轻微的逻辑。如果你愿意，可以在这里查看。

https://stackoverflow.com/a/38079241/6466619

Answer 4

您需要创建通知，以便可以通过调用NotificationManager.notify(ID, notification) 使用通知 ID 对其进行更新。

需要创建以下步骤来更新通知：

1. 更新或创建NotificationCompat.Builder 对象
2. 从中构建一个 Notification 对象
3. 使用您之前使用的相同 ID 发出通知

取自 android 开发者文档的示例：

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

// Sets an ID for the notification, so it can be updated
int notifyID = 1;

mNotifyBuilder = new NotificationCompat.Builder(this)
    .setContentTitle("New Message")
    .setContentText("You've received new messages.")
    .setSmallIcon(R.drawable.ic_notify_status)
numMessages = 0;

// Start of a loop that processes data and then notifies the user
...
mNotifyBuilder.setContentText(currentText).setNumber(++numMessages);

// Because the ID remains unchanged, the existing notification is updated.
mNotificationManager.notify(notifyID, mNotifyBuilder.build());
...

另请参阅有关 Stacking Notifications 的 Android 文档 https://developer.android.com/training/wearables/notifications/stacks.html