背景

早期的手机只有单卡 ，基本用默认卡（代码如下），那么双卡手机的业务逻辑就会存在问题。

//手动搜网的功能案例，根据卡槽/Phone对象直接获取信息private Context mcontext = context;private Phone mPhone = PhoneFactory.getPhone(0);//默认Phone//只搜索默认卡的网络模式if (phone != null) {phone.getNetworkSelectionMode(msg);}private int mSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;mSubId = mSubscriptionManager.getDefaultDataSubscriptionId();//默认数据卡

为适配双卡，则需要正确获取和传递subId等关键信息。

源码API

很多APP中还是使用from()获取subManager，其实这等同于直接获取系统服务的接口。

按照性能考虑，不如直接getSystemService就好了。

 SubscriptionManager subscriptionManager = SubscriptionManager.from(context);
SubscriptionManager 源码接口
//android-34\android\telephony\SubscriptionManager.java/** * @deprecated developers should always obtain references directly from * {@link Context#getSystemService(Class)}. */@Deprecatedpublic static SubscriptionManager from(Context context) {return (SubscriptionManager) context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);}

TelephonyManager也是一样的逻辑

private mTelephonyManager = TelephonyManager.from(context);
TelephonyManager.java 源码接口
//PATH:android-34\android\telephony\TelephonyManager.java//Android P之前使用/** {@hide} */@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P)public static TelephonyManager from(Context context) {return (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);}//现在常用，根据卡（注册信息）获取相应的TM，/** * Create a new TelephonyManager object pinned to the given subscription ID. * * @return a TelephonyManager that uses the given subId for all calls. */public TelephonyManager createForSubscriptionId(int subId) {// Don't reuse any TelephonyManager objects.return new TelephonyManager(mContext, subId);}

适配方案

根据注册信息去拿Phone对象，继而执行对应卡的业务。

private int mSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;mSubscriptionManager = (SubscriptionManager) context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);private int mPhoneId = -1;//TODO: 可优化，遍历所有注册列表，而不是用默认数据卡mSubId = mSubscriptionManager.getDefaultDataSubscriptionId();//根据注册信息获取Phone对象if (!SubscriptionManager.isValidPhoneId(mPhoneId)) {mPhoneId = SubscriptionManager.getPhoneId(mSubId);Log.d(TAG, "onReceive, mPhoneId = " + mPhoneId);if (SubscriptionManager.isValidPhoneId(mPhoneId)) {mPhone = PhoneFactory.getPhone(mPhoneId);Log.d(TAG,"onReceive, update phone");}}

获取当前注册列表

mSubscriptionManager.getActiveSubscrip

循环卡槽获取subid

private void getSubInfo() {//返回设备中当前可用的移动网络数量，多卡设备上通常为2或日后更多（双卡）int phoneCount = TelephonyManager.getDefault().getPhoneCount();if (phoneCount > 1) {// 当前设备支持双卡或多卡// TODO: 处理双卡或多卡的情况} else {// 当前设备只支持单卡// TODO: 处理单卡的情况}for (int i = 0; i < phoneCount; i ++) {//获取指定卡槽的注册信息。final SubscriptionInfo subInfo=mSubscriptionManager.getActiveSubscriptionInfoForSimSlotIndex(i);if (subInfo == null) {continue;}int subId = subInfo.getSubscriptionId();//获取对应SIM的CarrierConfig配置。PersistableBundle mCarrierConfig = mConfigManager.getConfigForSubId(subId);if (mCarrierConfig == null) {return;}}}

相关介绍

Android 双卡适配 subId 相关方法-CSDN博客

【笔记】Android Telephony | SIM 卡管理和subId、slotId、phoneId 定义关系说明_subid phoneid-CSDN博客