@Override
    protected boolean verifyDrawable(Drawable who) {
        return who == mBalloonMarkerDrawable || super.verifyDrawable(who);
    }
This is a BalloonMarker used to {@link SeekBar}
<p>
<p><strong>XML attributes</strong></p>
<p>
See {@link net.qiujuer.genius.ui.R.styleable#BalloonMarker_gFont Attributes},
{@link net.qiujuer.genius.ui.R.styleable#BalloonMarker_gMarkerBackgroundColor Attributes},
{@link net.qiujuer.genius.ui.R.styleable#BalloonMarker_gMarkerElevation Attributes}
{@link net.qiujuer.genius.ui.R.styleable#BalloonMarker_gMarkerSeparation Attributes}
{@link net.qiujuer.genius.ui.R.styleable#BalloonMarker_gMarkerTextAppearance Attributes}
{@link net.qiujuer.genius.ui.R.styleable#BalloonMarker_gMarkerTextPadding Attributes}
caprice/ui/src/main/java/net/qiujuer/genius/ui/widget/BalloonMarker.java