[android] Custom seekbar (thumb size, color and background)

For future readers!

Starting from material-components-android 1.2.0-alpha01, you can use new slider component

ex:

Modify thumbSize, thumbColor, trackColor accordingly.

<com.google.android.material.slider.Slider
        android:id="@+id/slider"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:valueFrom="20f"
        android:valueTo="70f"
        android:stepSize="10"
        app:thumbRadius="20dp"
        app:thumbColor="@color/colorAccent"
        app:trackColor="@android:color/darker_gray"
        />

Note: Track corners are not round.