Question

当启动IntentService在后台上传文件时，我想通过从服务内部调用showNotification()向用户显示上传正在进行的通知：

private void showNotification() {

    Notification notification = new Notification.Builder(this)
            .setSmallIcon(R.drawable.ic_cloud_upload_black_24dp)  
            .setWhen(System.currentTimeMillis()) 
            .setContentTitle("Uploading")
            .setContentText("Your upload is in progress.")
            .setOngoing(true)
            .build();

    mNotificationManager.notify(NOTIFICATION_ID, notification);
}

现在这是我的问题：通知显示在锁定屏幕上，但解锁屏幕时不在状态栏中显示。我想念什么？

部署目标是API级别24，因此丢失NotificationChannel不应成为原因。

Answer 1

尝试：

    PendingIntent pendingIntent = PendingIntent.getActivity(getmContext(), 0, new Intent(getmContext(), MainActivity.class), 0);
    android.app.Notification pp = new NotificationCompat.Builder(getmContext())
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setContentText(getMessage())
            .setContentIntent(pendingIntent)
            .build();

    NotificationManager notificationManager = (NotificationManager) getmContext().getSystemService(NOTIFICATION_SERVICE);
    notificationManager.notify(0, pp);

Answer 2

这是我的代码，可以与目标SDK 25

正常工作

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
                mContext);
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

        inboxStyle.addLine(message);

        Notification notification;
        notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
                .setAutoCancel(true)
                .setContentTitle(title)
                .setContentIntent(resultPendingIntent)

                .setStyle(inboxStyle)

                .setSmallIcon(R.mipmap.ic_launcher)
                .setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
                .setContentText(message)
                .build();

        NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(NOTIFICATION_ID, notification);

其中NOTIFICATION_ID

 public static final int NOTIFICATION_ID = 100;

Answer 3

我觉得好蠢。原来，通知一直显示，但是在黑色背景上带有黑色图标。

更改了xml中的图标颜色，

android:fillColor="#FF000000" 至 android:fillColor="#FFFFFFFF"

它就像一个魅力

Android-通知未出现在状态栏中

3 个答案: