@Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        removeCallbacks(mShowIndicatorRunnable);
        if (!isInEditMode()) {
            mIndicator.dismissComplete();
        }
    }
When the {@link DiscreteSeekBar} value changes this method is called
<p>
Subclasses may override this to add functionality around this event
without having to specify a {@link OnProgressChangeListener}
</p>
app/src/main/java/com/duan/musicoco/view/discreteseekbar/DiscreteSeekBar.java