set background color to notifications actions in android10

Question

I have achieved this image link by following this article https://medium.com/@dcostalloyd90/show-incoming-voip-call-notification-and-open-activity-for-android-os-10-5aada2d4c1e4 Notification buttons are working fine. Only issue is i am unable to set background color to these action buttons like visible in above article. I want to set green and red color to accept and cancel buttons respectively. How can i achieve this? Check following codes:

val notificationBuilder =
            NotificationCompat.Builder(this@IncomingTripService, CHANNEL_ID2)
                .setSmallIcon(R.drawable.logo2)
                .setContentTitle("New trip incoming")
                .setContentText("Respond as soon as possible")
                .setSound(null)
                .addAction(R.drawable.buttons,"ACCEPT", receiveCallPendingIntent)
                .addAction(R.drawable.buttons, "CANCEL", cancelCallPendingIntent)
                .setAutoCancel(true)
                .setDefaults(NotificationCompat.DEFAULT_ALL)
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setCategory(NotificationCompat.CATEGORY_CALL)
                .setFullScreenIntent(fullScreenPendingIntent, true)

buttons.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid
        android:color="@android:color/black"
        >
    </solid>
    <corners
        android:radius="15dp">
    </corners>

</shape>

Answer 1

I hope your question is still relevant. I also ran into this issue, but after some research i decided to not work with a "styled" action (didn't work as expected) but with a custom notification layout.

And yes, there's also an option to attach a custom view to the notification, a RemoteViews:

NotificationCompat.Builder(context, CHANNEL_ID)
            .setSmallIcon(R.drawable.some_drawable)
            .setPriority(NotificationCompat.PRIORITY_MAX)
            .setCategory(NotificationCompat.CATEGORY_CALL)
            .setStyle(NotificationCompat.DecoratedCustomViewStyle())
            .setCustomContentView(notificationLayout) // <--- attach custom layout
            .build()

The notificationLayout is created as follows:

val notificationLayout = RemoteViews(contex.packageName, R.layout.some_layout)
notificationLayout.setOnClickPendingIntent(R.id.some_button, actionPendingIntent)

Your layout some_layout can be a normal layout like you would create for custom dialogs, fragments or activities. But beware, a layout of a RemoteViews is limited to the following Views and ViewGroups: https://developer.android.com/reference/android/widget/RemoteViews

If you use other Views or ViewGroups than listed in the documentation your notification will simply not be displayed.

Also have an eye on https://developer.android.com/training/notify-user/custom-notification. Here you can find some useful hints why you should use predefined styles for the TextViews you're using in your layout, to be conform with day- and night mode and not to have white-on-white-text by accident.

And if everything is working fine you can come up with a styled notification like this one:

PS: If you want to create a custom notification for an incoming call (or something like this) and you want your notification to stay open all the time and not to collaps to the tray then add a FullscreenIntent to your notification (https://developer.android.com/training/notify-user/time-sensitive):

notificationBuilder.setFullScreenIntent(anotherActionPendingIntent, true)

And also don't forget to include the required permission in the manifest:

<uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />

PPS: As an addition, here's the full layout of the custom notification:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/txtTitle"
        style="@style/TextAppearance.Compat.Notification.Title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/notification_incoming_call_title" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btnAccept"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_weight="1"
            android:backgroundTint="@color/notification_incoming_call_accept"
            android:text="@string/notification_incoming_call_accept"
            android:textAllCaps="false"
            android:textColor="@color/notification_incoming_call_text" />

        <Button
            android:id="@+id/btnDecline"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_weight="1"
            android:backgroundTint="@color/notification_incoming_call_decline"
            android:text="@string/notification_incoming_call_decline"
            android:textAllCaps="false"
            android:textColor="@color/notification_incoming_call_text" />
    </LinearLayout>
</LinearLayout>