java.io.IOException: No such file or directory
2018-03-14 23:00
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这个异常可能是由于Android 6.0 （API 23）之后读写数据被系统视为了危险权限，即使在 AndroidManifest.xml 配置里开放了读写的权限，也需要用户手动去授予才行。 此时 Android 6.0 （API 23）之后需要动态的申请权限，才能正常的读写数据。
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