im.yixin.sdk.util
接口 
SDKConstants
YixinConstants
 
BitmapUtil
DevicesUtils
EncryptUtil
FileUtil
SDKFeedBackUtils
SDKHttpUtils
SDKLogger
SDKNetworkUtil
SDKUtil
StringUtil
YixinProtocol
枚举 
SDKConstants.SDKApplicationState
SDKConstants.ThirdPartAppCommand
异常 
SDKHttpUtils.HttpCodeException