云台不显示问题修复，LC问题

wxr

2023-03-16 68d9078b49cfa8e83ed553835b05d4042c183969

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<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">   
    <gradient
        android:startColor="#20000000"
        android:endColor="@android:color/transparent"
        android:angle="270" >
    </gradient>
</shape>