Custom arrows without image: Android

Can be done easily using paths:

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="32dp"
        android:height="24dp"
        android:viewportWidth="32.0"
        android:viewportHeight="24.0">
    <path android:fillColor="#e4e4e8"
          android:pathData="M0 0 h32 l-16 24 Z"/>
</vector>

arrow


<TextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="▲"/>

or

<TextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="▼"/>

You can get here more options.