Stars in notifications

Sample.kt

fun notification() {
  val channelId = "stars"
  val notificationManager = activity.getSystemService<NotificationManager>()
  if (VERSION.SDK_INT >= VERSION_CODES.O) {
    val channels = notificationManager.notificationChannels
    if (channels.none { it.id == channelId }) {
      NotificationChannel(
          channelId, "stars", NotificationManager.IMPORTANCE_HIGH)
          .apply {
            description = "Demo"
          }
          .let {
            notificationManager.createNotificationChannel(it)
          }
    }
  }


  val notificationView = RemoteViews(activity.packageName, R.layout.stars_notification)
  notificationView.setOnClickPendingIntent()
  val notificationId = activity.getString(R.string.app_name).hashCode()
  NotificationCompat.Builder(activity, channelId)
      .apply {
        color = ContextCompat.getColor(activity, R.color.colorAccent)
        setCustomBigContentView(notificationView)
        setContentTitle("Rate something!")
        setAutoCancel(true)
      }
      .let {
        notificationManager.notify(notificationId, it.build())
      }
}

stars_notification.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    >

  <TextView
      android:id="@+id/title"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Rate your trip!"
      android:padding="8dp"
      style="@style/TextAppearance.AppCompat.Headline"
      />

  <LinearLayout
      android:layout_below="@id/title"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:gravity="center_horizontal"
      android:dividerPadding="16dp"
      android:padding="16dp"
      android:orientation="horizontal"
      >

    <ImageView
        android:id="@+id/star1"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:src="@drawable/ic_star_border_black_24dp"
        tools:src="@drawable/ic_star_black_24dp"
        />

    <ImageView
        android:id="@+id/star2"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:src="@drawable/ic_star_border_black_24dp"
        tools:src="@drawable/ic_star_black_24dp"
        />

    <ImageView
        android:id="@+id/star3"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:src="@drawable/ic_star_border_black_24dp"
        tools:src="@drawable/ic_star_black_24dp"
        />

    <ImageView
        android:id="@+id/star4"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:src="@drawable/ic_star_border_black_24dp"
        tools:src="@drawable/ic_star_black_24dp"
        />

    <ImageView
        android:id="@+id/star5"
        android:layout_width="42dp"
        android:layout_height="42dp"
        android:src="@drawable/ic_star_border_black_24dp"
        tools:src="@drawable/ic_star_black_24dp"
        />

  </LinearLayout>

</RelativeLayout>