Android开发头像挨着叠加效果

一、效果图

二、思路分析

叠加肯定用到FrameLayout,因为数量不一定，就需要动态addView。然后
headParams.leftMargin来设置偏移量

三、案例关键代码：

xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/white_circle"
>

    <ImageView
    android:id="@+id/iv_head_small"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="1dp"
    android:scaleType="centerCrop" />

</FrameLayout>  

java代码：

        for (i in dataBean.user_items.indices) {
            val headParams = FrameLayout.LayoutParams(UtilHelper.dip2px(mActivity, 26f), UtilHelper.dip2px(mActivity, 26f))
            val headGroupView = UtilHelper.inflate(mActivity!!, R.layout.layout_ceo_data_head)
            headParams.leftMargin = (dataBean.user_items.size - i - 1) * UtilHelper.dip2px(mActivity, 20f)
            headGroupView.layoutParams = headParams


            val headView = headGroupView.findViewById<ImageView>(R.id.iv_head_small)
            GlideHelper.load(mActivity!!, dataBean.user_items[i].img!!, headView, 7)
            fl_user_heads?.addView(headGroupView)
        }

关键是headParams.leftMargin思路