Ich habe eine benutzerdefinierte Benachrichtigung mit dem RemoteViews-Widget implementiert. Ich habe es auf Android 5.0.2 und Android 6.0 getestet. Es hat gut funktioniert. Aber irgendwann stürzte es jedes Mal ab, wenn es von GCM benachrichtigt wurde.

Crash Dump -

Process: package.name, PID: 27743
android.app.RemoteServiceException: Bad notification posted from package package.name: Couldn't expand RemoteViews for: StatusBarNotification(pkg=package.name user=UserHandle{0} id=1524095391 tag=null key=0|package.name|1524095391|null|10247: Notification(pri=0 contentView=package.name/0x7f040033 vibrate=null sound=null defaults=0x0 flags=0x10 color=0x00000000 category=recommendation vis=PUBLIC))
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1631)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Mein Layout für RemoteViews enthält ImageView in LinearLayout- und benutzerdefinierten TextView-Klassen, die TextView erweitern.

Mein Code zum Erstellen einer Benachrichtigung ist

    private void showCustomNotification(ABCNotification notification) {
        RemoteViews notificationView = new RemoteViews(getPackageName(), R.layout.layout_notification);
        PendingIntent contentPendingIntent = PendingIntent.getBroadcast(mContext, 0, notification.getContentIntent(), PendingIntent.FLAG_UPDATE_CURRENT);

                NotificationCompat.Builder builder = new NotificationCompat.Builder(mContext);
                builder.setSmallIcon(R.drawable.ic_notification).setAutoCancel(true).setContentIntent(contentPendingIntent);

                // Set Notification Priority
                builder.setPriority(notification.getNotificationPriority());

                // Set Notification Category
                builder.setCategory(notification.getNotificationCategory());

                // Set Notification Visibility
                builder.setVisibility(notification.getNotificationVisibility());

notificationView.setTextViewText(R.id.tv_notification_title, notification.getTitle());
        notificationView.setTextViewText(R.id.tv_notification_message, notification.getMessage());
        notificationView.setTextViewText(R.id.tv_notification_subtext, notification.getSubtext());
        Notification notif = builder.build();
                if (null != notif) {
                    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
                        notif.bigContentView = notificationView;
                    }
                    notif.contentView = notificationView;
                    NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
                    notificationManager.notify(mNotificationId, notif);
                }
    }

Mein Layout für RemoteViews sieht ungefähr so aus

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:paddingBottom="4dp"
            android:paddingTop="4dp">

            <com.abc.ui.customviews.fonts.TextViewYMRegular
                android:id="@+id/tv_notification_title"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:ellipsize="end"
                android:singleLine="true"
                android:textColor="@color/black"
                android:textSize="16sp" />

            <com.abc.ui.customviews.fonts.TextViewYMMedium
                android:id="@+id/tv_notification_message"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:textColor="@color/black"
                android:textSize="14sp" />

            <com.abc.ui.customviews.fonts.TextViewYMMedium
                android:id="@+id/tv_notification_subtext"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textColor="@color/black"
                android:textSize="12sp" />
        </LinearLayout>

</LinearLayout>

Ich habe fast die gesamte Lösung für den Stapelüberlauf gesehen. Nichts scheint zu funktionieren.

Lustiger Teil ist, es hat vorher einwandfrei funktioniert. Aber irgendwann stürzte ab. Alles in 2 Stunden.