Android 判断View是否显示出现在屏幕上、判断View可视区域占其自身百分比

判断View是否显示出现在屏幕上
fun isCoverScreen_LocalVisibleRect(view1: View): Boolean {
        val screenWidth = CFUtil.getScreenWidth()//获取屏幕宽度
        val screenHeight = CFUtil.getScreenHeight()//获取屏幕高度
        val rect = Rect()
        view1.getLocalVisibleRect(rect)
        return !(rect.top<0||rect.bottom>screenHeight)
}

判断View可视区域占其自身百分比
fun getVisibilePercent(view1: View): Int {
        val rect = Rect()
        view1.getLocalVisibleRect(rect)
       val a = rect.height() * 100 / view1.height
        return a
}