长图加载（Pop+Glide+ScrollView）

1. 点击控件弹出pop

R.id.tv_detial -> showPop()

2. showPop方法（长图用Glide加载）

 private fun showPop() {
        val view = LayoutInflater.from(context).inflate(R.layout.pop_kid, null)
        var iv_scrollView = view.findViewById<ImageView>(R.id.iv_scrollView)
        Glide.with(this)
            .load("http://hyt.edudjt.com/hyt/LessonIntroduce/kid_immature.png")
            .error(R.mipmap.dog_step1)
            .into(iv_scrollView)
        val popupWindow = PopupWindow(
            view,
            ViewGroup.LayoutParams.WRAP_CONTENT,
            ViewGroup.LayoutParams.WRAP_CONTENT
        )
        popupWindow.setBackgroundDrawable(ColorDrawable())
        popupWindow.isOutsideTouchable = true
        setBackGroundAlpha(0.5f)
        popupWindow.isFocusable = true
        popupWindow.setOnDismissListener {
            setBackGroundAlpha(1f)
        }
        popupWindow.showAtLocation(cl, Gravity.RIGHT, 0, 0)
    }

    private fun setBackGroundAlpha(bgAlpha: Float) {
        val lp = (context as Activity).window.attributes
        lp.alpha = bgAlpha
        (context as Activity).window.attributes = lp
    }

3. Pop布局（不能用约束布局）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ScrollView
        android:id="@+id/scrollView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fadingEdge="vertical"
        android:scrollbars="none">

            <ImageView
                android:id="@+id/iv_scrollView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                 />

    </ScrollView>
</LinearLayout>