修改获取不到地图时 hashmap可能为空的问题

endian11

2020-11-26 a95ed2b4ab5cb3d2663b8a8346f2630991ff22ec

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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="arcgis_license_key">YOUR_LICENSE_KEY</string>
</resources>