Android 广告标题透明背景

colors

<!-- 透明色 -->
<color name="transparent_dark">#88000000</color>

drawable

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/transparent_dark" />
    <corners android:bottomRightRadius="3dp"
        android:bottomLeftRadius="3dp"/>
</shape>

调用

android:background="@drawable/shape_corner_down"