业务知识

漫游有国内和国际漫游之分，Android代码定义如下：

//frameworks/base/telephony/java/android/telephony/ServiceState.java/*** registered in a domestic roaming network* @hide*/@SystemApipublic static final int ROAMING_TYPE_DOMESTIC = 2;/*** registered in an international roaming network* @hide*/@SystemApipublic static final int ROAMING_TYPE_INTERNATIONAL = 3;

ROAMING_TYPE_XXX	int	Function
ROAMING_TYPE_DOMESTIC	2	国内漫游 domestic
ROAMING_TYPE_INTERNATIONAL	3	国际漫游  international

参考：【笔记】Android 漫游定制SPN定制有关字段-CSDN博客

不清楚漫游到国内外的情况时，可以通过底层上报获取状态，接口getDataRoamingType()。

日志分析

• < DATA_REGISTRATION_STATE ：MD上报注册状态信息
• Poll ServiceState done ：上层Telephony SST更新
• DataRoamingType：包含在SS网络信息
• setCarrierText：更新运营商名称
• Broadcasting ServiceState：SST广播网络状态更新

//处于搜网 

04-12 13:38:30.662296  2098  2545 D RILJ    : [0936]< DATA_REGISTRATION_STATE android.hardware.radio.network.RegStateResult{regState: NOT_REG_MT_NOT_SEARCHING_OP, rat: UNKNOWN, reasonForDenial: NONE, cellIdentity: android.hardware.radio.network.CellIdentity.noinit(false), registeredPlmn: , accessTechnologySpecificInfo: android.hardware.radio.network.AccessTechnologySpecificInfo.noinit(false)} [PHONE0]

//ServiceState状态是漫游中，但状态未知

04-12 13:38:42.310670  2098  2098 D MTKSST  : [GsmSST0] handlePollStateResultMessage: PS cellular. NetworkRegistrationInfo{ domain=PS transportType=WWAN registrationState=ROAMING networkRegistrationState=ROAMING roamingType=UNKNOWN accessNetworkTechnology=LTE rejectCause=0 emergencyEnabled=false availableServices&