加入网路是否可用判断；删除一些log打印

lizhanwei

2020-03-04 7a7fcb374328afa2351c0ac22b8f2b7043fd0a0d

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
</project>