如果库没倒错，许可证也在，一般是权限问题，要确保以下三个读写权限都在，制定版本要动态申请，官方Demo的代码里动态申请权限少一个。

/*** 需要申请的权限数组*/protected String[] needPermissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.READ_PHONE_STATE,Manifest.permission.ACCESS_WIFI_STATE,Manifest.permission.ACCESS_NETWORK_STATE,Manifest.permission.CHANGE_WIFI_STATE,};