修改地图为单线程绘制，收到的数据放入队列

lizhanwei

2020-01-21 aff3ecab64dd259fdbbf8382dc02325b46d7b4d1

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<?xml version="1.0" encoding="utf-8"?>
<level-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:maxLevel="0" android:drawable="@drawable/antenna_red" />
    <item android:maxLevel="1" android:drawable="@drawable/antenna" />
</level-list>