SeekBarWidget.java 文件源码

/**
 * <b>Note, that on pre {@link android.os.Build.VERSION_CODES#LOLLIPOP LOLLIPOP} Android versions
 * this method will return an instance of {@link TintDrawable TintDrawable} if tint has been applied
 * via {@link #setThumbTintList(ColorStateList)}.</b>
 * <p>
 * The original wrapped drawable can be obtained via {@link TintDrawable#getDrawable()}.
 */
@Override
public Drawable getThumb() {
    if (mThumb instanceof ScaleDrawable) return ((ScaleDrawable) mThumb).getDrawable();
    return mThumb;
}