@Override
    public int getOpacity() {
        return PixelFormat.TRANSLUCENT;
    }
A drawable that changes it's Paint color depending on the Drawable State
<p>
Subclasses should implement {@link #doDraw(Canvas, Paint)}
</p>

@hide
app/src/main/java/com/duan/musicoco/view/discreteseekbar/internal/drawable/StateDrawable.java