Android 关于Snackbar bottomMargin的bug

最近公司有一个关于snackbar的需求，就是可以自定义snackbar显示在屏幕的位置，在网上搜了很多关于怎么让snackbar显示在距离屏幕底部一定距离的文章，但是基本就是不行。结合了两个其他人的想法，终于搞定了。可以参照其他人的链接：snackbar 自定义
snackbar 的bottomMargin
实现代码：
一个自定义snackbar 的工具类

class SnackbarUtil {
    companion object {
        fun showSnackbar(view: View, message: String, bottomMargin: Int, isAddAnchrview: Boolean, isShowAction: Boolean, actionText: String, snackbarActionListener: SnackbarActionListener?) {
            val snackbar = Snackbar.make(view, message, Snackbar.LENGTH_SHORT).addCallback(
                    object : Snackbar.Callback() {
                        override fun onDismissed(transientBottomBar: Snackbar?, event: Int) {
                            super.onDismissed(transientBottomBar, event)
                            snackbarActionListener?.onSnackbarDismissed(event)
                        }
                    }
            )
            val snackbarView = snackbar.view
            if (isAddAnchrview) {
            //这个属性是决定于snackbar显示在哪个控件上
                snackbar.anchorView = view
            }
            val snackbarLayout = snackbarView as Snackbar.SnackbarLayout

            snackbarLayout.setBackgroundColor(Color.TRANSPARENT)
            val textView = snackbarLayout.findViewById<TextView>(com.google.android.material.R.id.snackbar_text)
            textView.visibility = View.INVISIBLE

            val customView = LayoutInflater.from(view.context).inflate(R.layout.layout_snackbar_custom_text, LinearLayout(view.context), false) as ViewGroup
            val childLayout = customView.getChildAt(0)
            val params = childLayout.layoutParams as ViewGroup.MarginLayoutParams
            params.setMargins(params.leftMargin, params.topMargin, params.rightMargin, params.bottomMargin + bottomMargin)
            childLayout.layoutParams = params
            customView.findViewById<AppCompatTextView>(R.id.tv_action).apply {
                if (isShowAction) {
                    text = actionText
                    visibility = View.VISIBLE
                    this.setOnClickListener {
                        snackbarActionListener?.onSnackbarClicked()
                    }
                } else {
                    visibility = View.GONE
                }
            }

            customView.findViewById<AppCompatTextView>(R.id.tv_snackbar).text = message
            snackbarLayout.addView(customView, 0)

            snackbar.show()

        }

    }

    interface SnackbarActionListener {
        fun onSnackbarClicked()

        fun onSnackbarDismissed(event: Int)
    }
}

//自定义layout, 这里需要说明的是必须要有两层布局，否则就会有bug
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/bg_snackbar_color"
        android:minHeight="48dp"
        android:orientation="horizontal"
        android:elevation="6dp">

        <androidx.appcompat.widget.AppCompatTextView
            android:id="@+id/tv_snackbar"
            style="@style/Body"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginTop="12dp"
            android:layout_marginEnd="16dp"
            android:layout_marginBottom="12dp"
            android:layout_weight="1"
            android:textColor="@color/white"
            tools:text="Snack bar message goes here, when there are ." />

        <androidx.appcompat.widget.AppCompatTextView
            android:id="@+id/tv_action"
            style="@style/Subhead"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@color/indigo_400"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="16dp"
            android:layout_gravity="center"
            android:text="Action" />

    </LinearLayout>

</LinearLayout>

最后在activity或者fragment实现

  context?.resources?.getDimensionPixelSize(R.dimen.dp_18)?.let {
                    SnackbarUtil.showSnackbar(mView,
                            "Snack bar message goes here, when there are two lines of.", it, isAddAnchrview = true,
                            isShowAction = false, actionText = "", snackbarActionListener = null)
                }

来源：CSDN

作者：qq_32726703

链接：https://blog.csdn.net/qq_32726703/article/details/103460190