import org.adw.library.widgets.discreteseekbar.internal.drawable.AlmostRippleDrawable; //导入依赖的package包/类
/**
 * Our DiscreteSeekBar implementation uses a circular drawable on API < 21
 * because we don't set it as Background, but draw it ourselves
 *
 * @param colorStateList
 * @return
 */
public static Drawable getRipple(ColorStateList colorStateList) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        return SeekBarCompatDontCrash.getRipple(colorStateList);
    } else {
        return new AlmostRippleDrawable(colorStateList);
    }
}
 

import org.adw.library.widgets.discreteseekbar.internal.drawable.AlmostRippleDrawable; //导入依赖的package包/类
/**
 * Sets the color of the seekbar ripple
 *
 * @param drawable
 * @param colorStateList The ColorStateList the track ripple will be changed to
 */
public static void setRippleColor(@NonNull Drawable drawable, ColorStateList colorStateList) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        ((RippleDrawable) drawable).setColor(colorStateList);
    } else {
        ((AlmostRippleDrawable) drawable).setColor(colorStateList);
    }
}
 

import org.adw.library.widgets.discreteseekbar.internal.drawable.AlmostRippleDrawable; //导入依赖的package包/类
/**
 * Sets the color of the seekbar ripple
 * @param drawable
 * @param colorStateList The ColorStateList the track ripple will be changed to
 */
public static void setRippleColor(@NonNull Drawable drawable, ColorStateList colorStateList) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        ((RippleDrawable) drawable).setColor(colorStateList);
    } else {
        ((AlmostRippleDrawable) drawable).setColor(colorStateList);
    }
}