A VectorDrawable
should consist of at least one <path>
tag defining a shape
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24.0"
android:viewportHeight="24.0">
<path
android:fillColor="#FF000000"
android:pathData="M0,24 l12,-24 l12,24 z"/>
</vector>
This would produce a black triangle: