Android开发代码中设置Margin

Android开发代码中设置Margin

直接上代码，不过是kotlin代码

inline fun <reified T : ViewGroup.LayoutParams> View.updateLayoutParams(block: T.() -> Unit) {
    val params = layoutParams as T
    block(params)
    layoutParams = params
}

fun View.updateMargin(left: Int? = null, top: Int? = null, right: Int? = null, bottom: Int? = null) {
    (layoutParams as? ViewGroup.MarginLayoutParams)?.let { param ->
        updateLayoutParams<ViewGroup.MarginLayoutParams> {
            left?.let {
                marginStart = left
            }

            right?.let {
                marginEnd = right
            }

            top?.let {
                topMargin = top
            }

            bottom?.let {
                bottomMargin = bottom
            }
        }
    }
}

就算外层是约束布局ConstraintLayout也是可以直接使用的，可以偏移的