Android8.1 源码修改之插入SIM卡默认启用Volte功能
前言
公用电话产品，插入SIM卡后要求自动打开Volte功能，即插即用，用完拔卡就走
实现
第一步开关对应的代码
通过打印日志和全局查找，源码位置vendor/mediatek/proprietary/packages/services/Telephony/src/com/android/phone/MobileNetworkSettings.java
04-1508:15:29.2381191-1191/com.android.phoneI/NetworkSettings:isUpdateTabsNeeded:-DO_NOTHINGnewSil.size()=1mActiveSubInfos.size()=1
04-1508:15:29.2401191-1191/com.android.phoneD/NetworkSettings:initializeSubscriptions:DO_NOTHING
04-1508:15:29.2401191-1191/com.android.phoneD/NetworkSettings:convertTabToSlot:infosize=1currentTab=0slotId=0
04-1508:15:29.2461191-1191/com.android.phoneI/NetworkSettings:updatePhone:-slotId=0sir={id=1,iccId=89861114706315182802simSlotIndex=0displayName=中国电信carrierName=中国电信nameSource=0iconTint=-16746133dataRoaming=0iconBitmap=android.graphics.Bitmap@ca496f0mcc460mnc11isEmbeddedfalseaccessRulesnull}
04-1508:15:29.2461191-1191/com.android.phoneD/NetworkSettings:updateBody:isLteOnCdma=truephoneSubId=1
04-1508:15:29.2531191-1191/com.android.phoneD/NetworkSettings:phoneType==PhoneConstants.PHONE_TYPE_CDMAorisCTVOLTE...
04-1508:15:29.2661191-1191/com.android.phoneD/NetworkSettings:isWorldMode=false
04-1508:15:29.2671191-1191/com.android.phoneD/NetworkSettings:isWorldMode=false
04-1508:15:29.2671191-1191/com.android.phoneD/NetworkSettings:settingsNetworkMode:10
04-1508:15:29.2851191-1191/com.android.phoneD/NetworkSettings:[addEnhanced4GLteSwitchPreference]volteEnabled:true
04-1508:15:29.2851191-1191/com.android.phoneD/NetworkSettings:[addEnhanced4GLteSwitchPreference]RemovemButton4glte!
04-1508:15:29.2851191-1191/com.android.phoneD/NetworkSettings:[addEnhanced4GLteSwitchPreference]ss:false
04-1508:15:29.3071191-1191/com.android.phoneD/DefaultMobileNetworkSettingsExt:customizeEnhanced4GLteSwitchPreference
04-1508:15:29.3201191-1191/com.android.phoneD/NetworkSettings:CdmaNetworkSettingsdestroycom.android.phone.MobileNetworkSettings@99b81a5
04-1508:15:29.3201191-1191/com.android.phoneD/CdmaNetworkSettings:onDestroy
通过MtkImsManager.setEnhanced4gLteModeSetting(this,enhanced4gModePref.isChecked(),phoneId);这行代码来实现volte的打开、关闭
第二步插卡后调用开关的代码
通过插卡后分析日志发现打印android.intent.action.SIM_STATE_CHANGED，字面意思Sim卡状态改变通知,全局查找到，
源码位置
vendor\mediatek\proprietary\packages\services\Telephony\src\com\mediatek\settings\cdma\CdmaVolteServiceChecker.java
修改如下
privateBroadcastReceivermReceiver=newBroadcastReceiver(){
@Override
publicvoidonReceive(Contextcontext,Intentintent){
Log.d(TAG,"onReceive,action="+intent.getAction());
updateState();
//cczhengaddwhenreciveSIM_STATE_CHANGEDdefaultopenvolte
if(TelephonyIntents.ACTION_SIM_STATE_CHANGED.equals(intent.getAction())){
updateVolteState();
}
};
};
//cczhengaddcheckvolteisopen,anddefalutopenvolte
privatevoidupdateVolteState(){
Log.e(TAG,"updateVolteState....");
intsubId=getListenSubId();
Log.i(TAG,"isValidSubscriptionId=="+SubscriptionManager.isValidSubscriptionId(subId));
Log.i(TAG,"isCtVolteEnabled=="+TelephonyUtilsEx.isCtVolteEnabled());
if(SubscriptionManager.isValidSubscriptionId(subId)&&TelephonyUtilsEx.isCtVolteEnabled()){
booleanvolteOn=MtkImsManager.isEnhanced4gLteModeSettingEnabledByUser(mContext,
SubscriptionManager.getPhoneId(subId));
booleanisEnable4gOn=isEnable4gOn(subId);
Log.i(TAG,"isEnable4gOn=="+isEnable4gOn);
Log.i(TAG,"volteOn=="+volteOn);
intphoneId=SubscriptionManager.getPhoneId(subId);
Log.e(TAG,"phoneId="+phoneId+"subId="+subId);
if(!volteOn){
MtkImsManager.setEnhanced4gLteModeSetting(mContext,true,phoneId);
}
}
}
privatebooleanisLteNetwork(intsubId){
booleanisLte=false;
intnetworkType=TelephonyManager.NETWORK_TYPE_UNKNOWN;
finalintdataNetworkType=TelephonyManager.getDefault().getDataNetworkType(subId);
finalintvoiceNetworkType=TelephonyManager.getDefault().getVoiceNetworkType(subId);
Log.d(TAG,"dataNetworkType="+dataNetworkType
+",voiceNetworkType="+voiceNetworkType);
if(TelephonyManager.NETWORK_TYPE_UNKNOWN!=dataNetworkType){
networkType=dataNetworkType;
}elseif(TelephonyManager.NETWORK_TYPE_UNKNOWN!=voiceNetworkType){
networkType=voiceNetworkType;
}
if((networkType==TelephonyManager.NETWORK_TYPE_LTE)
||(networkType==TelephonyManager.NETWORK_TYPE_LTE_CA)){
isLte=true;
}
Log.d(TAG,"isLte="+isLte);
returnisLte;
}
至此，搞定，简单说下上面的代码，当收到SIM状态改变的广播，检查卡的subId是否是有效的(subId>0)，卡片是否支持Volte功能，同时满足则获取当前Volte是否已启用，未启用则调用MtkImsManager.setEnhanced4gLteModeSetting()打开
总结
以上所述是小编给大家介绍的Android8.1源码修改之插入SIM卡默认启用Volte功能,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！
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