[MT8766][Android12] 使用谷歌LPA实现ESIM功能的流程

开发平台基本信息

芯片: MT8766
版本: Android 12
kernel: msm-4.19

问题描述

客户需要我们设备支持ESIM功能，5月份的时候在高通6125上面预研过ESIM功能，当时ESIM供应商是Links field，集成流程只是内置了ESIM厂商的apk，并且开启了feature以及默认给了一些权限，具体ESIM功能的实现都是在厂商的apk中，所以就没去深入研究ESIM功能。但是，由于Links field报价过高，所以这次又找了两家ESIM厂商，分别是鹏越与紫光；鹏越只把他们的ESIM芯片寄给了我们，然后让我们去找GMS实验室要LPA的相关资料，按照谷歌的标准流程操作，即可实现ESIM功能；而紫光则提供了一个他们的apk，并且要求给权限与feature，与之前的Links field类似。GMS实验室提供了一份资料，里面包含了3份文档以及一个apk。
三份文档的内容大致为：

• 1、如何集成LPA
• 2、如何实现overlay app
• 3、如何在开机向导和系统设置增加ESIM选项

ESIM功能可以简单理解为，ESIM厂家提供芯片，芯片分为贴片式跟拔插式，贴片式是贴到主板上，类似于各种单片机；而拔插式则是一张实体ESIM卡，长得跟普通的SIM卡一样，需要插入到卡槽中才能使用；然后，就到ESIM运营商购买ESIM卡号，安卓系统就可以通过谷歌LPA服务将购买的ESIM卡号下载到ESIM芯片中，下载完成启用ESIM卡就能正常使用了，一张ESIM芯片可以下载多个ESIM卡，但是，设备最多只能启用一张ESIM。

实现流程

在验证ESIM功能之前，可以先到设置-关于手机-sim卡详细信息中查看是否有EID，EID是ESIM芯片的唯一标识，代表着ESIM的正常使用，如果设备无法读取到EID，得排查硬件通路以及modem。

ESIM功能都实现流程可以分为以下几个步骤：

• 启用euicc的feature
• 内置谷歌LPA服务到system/priv-app/
• 给LPA服务增加priv-app权限或者关闭权限校验
• 增加overlay app
• 在系统设置中，调起LPA服务下载ESIM卡号，并启用ESIM

framework中已经有euicc的feature，只需要拷贝到设备即可

--- a/device/mediateksample/custom_go/full_custom_go.mk
+++ b/device/mediateksample/custom_go/full_custom_go.mk
@@ -7,3 +7,11 @@ MTK_TARGET_PROJECT_FOLDER := $(LOCAL_PATH)-include $(MTK_TARGET_PROJECT_FOLDER)/vnd_$(MTK_TARGET_PROJECT).mkPRODUCT_NAME := full_custom_go+PRODUCT_COPY_FILES += \
+	frameworks/native/data/etc/android.hardware.telephony.euicc.xml:system/etc/permissions/android.hardware.telephony.euicc.xml \
+

内置谷歌LPA服务到system/priv-app/

--- a/device/mediateksample/p8_go/full_custom_go.mk
+++ b/device/mediateksample/p8_go/full_custom_go.mk
@@ -7,3 +7,11 @@ MTK_TARGET_PROJECT_FOLDER := $(LOCAL_PATH)-include $(MTK_TARGET_PROJECT_FOLDER)/vnd_$(MTK_TARGET_PROJECT).mkPRODUCT_NAME := full_custom_go
+
+PRODUCT_PACKAGES += \
+	EuiccGoogle \
+LOCAL_PATH := $(call my-dir)###############################################################################
include $(CLEAR_VARS)
LOCAL_MODULE 				:= EuiccGoogle
LOCAL_SRC_FILES 			:= EuiccGoogle.apk
LOCAL_MODULE_CLASS 			:= APPS
LOCAL_CERTIFICATE 			:= PRESIGNED
LOCAL_PRIVILEGED_MODULE 	:= true
LOCAL_MODULE_TAGS 			:= optional
include $(BUILD_PREBUILT)

给LPA服务增加priv-app权限或者关闭权限校验，这里选择的是关闭权限校验

--- a/frameworks/base/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
+++ b/frameworks/base/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
@@ -3469,6 +3469,8 @@ public class PermissionManagerService extends IPermissionManager.Stub {@NonNull PackageSetting packageSetting, @NonNull Permission permission) {if (RoSystemProperties.CONTROL_PRIVAPP_PERMISSIONS_DISABLE) {return true;
+        }else if (!RoSystemProperties.CONTROL_PRIVAPP_PERMISSIONS_DISABLE) {
+            return true;}final String packageName = pkg.getPackageName();if (Objects.equals(packageName, PLATFORM_PACKAGE_NAME)) {

增加overlay app，这个app是自己写的，需要实现几个功能

• 在AndroidManifest.xml中注册广播

        <receiverandroid:name=".PartnerReceiver"android:permission="android.permission.WRITE_EMBEDDED_SUBSCRIPTIONS"android:directBootAware="true"android:exported="true"><intent-filter><action android:name="com.google.android.euicc.action.PARTNER_CUSTOMIZATION" /></intent-filter></receiver>

• 在java文件中实现广播，并且广播方法中必须为空

package com.tp.euicc.overlay;import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;public class PartnerReceiver extends BroadcastReceiver {public PartnerReceiver() {}@Overridepublic void onReceive(Context context, Intent intent) {}
}

• 在res/values/strings.xml中增加两个字段

    <string name="sim_slot_mappings_json" translatable="false">{"sim-slot-mappings":[{"devices":["custom_go"],"esim-slot-ids":[0],"psim-slot-ids":[1]}]}</string><integer name="download_type">3</integer>

谷歌LPA就是通过广播找到overlay app，然后从app的资源文件中获取sim_slot_mappings_json的值，拿到配置数据，其中devices的值要修改为Build.DEVICE，如果是其他项目移植要记得修改。后面的esim是虚拟sim卡，psim是物理sim卡，ids的值分别是对应的卡槽，比如在SIM 1卡槽接了ESIM，这里就配成0，不过实际测试，不过怎么配置ids，都能使用ESIM。

在系统设置中，调起LPA服务下载ESIM卡号，并启用ESIM
按照上面的方式集成之后，在系统设置-网络-移动网络选项，如果没有下载过ESIM，点击就会调起谷歌LPA服务，或者可以通过adb广播调起LPA配置界面，然后根据提示，扫描二维码，下载ESIM卡号即可。

adb shell am start -n
"com.google.android.euicc/com.android.euicc.ui.settings.CurrentProfileListActivity"

其他问题

之前在2290上面调试，出现下载完ESIM卡号之后，无法启用ESIM功能，需要在ESIM界面开、关一次飞行模式，ESIM启用按钮才可以点击。解决方案如下：

--- a/QSSI.12/packages/apps/Settings/src/com/android/settings/network/telephony/MobileNetworkSettings.java
+++ b/QSSI.12/packages/apps/Settings/src/com/android/settings/network/telephony/MobileNetworkSettings.java
@@ -58,6 +58,7 @@ import com.android.settingslib.search.SearchIndexable;import com.android.settingslib.utils.ThreadUtils;import org.codeaurora.internal.IExtTelephony;import java.util.Arrays;import java.util.List;
@@ -106,7 +107,8 @@ public class MobileNetworkSettings extends AbstractMobileNetworkSettings {private void setScreenState() {int simState = mTelephonyManager.getSimState();
-        boolean screenState = simState != TelephonyManager.SIM_STATE_ABSENT;
+        // boolean screenState = simState != TelephonyManager.SIM_STATE_ABSENT;
+        boolean screenState = true;if (screenState) {

在MTK8766中同样出现不可点击的问题，而且还把白卡显示出来，造成了混淆，解决方案如下：

--- a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/network/MobileNetworkListController.java
+++ b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/network/MobileNetworkListController.java
@@ -26,7 +26,9 @@ import android.content.Intent;import android.provider.Settings;import android.telephony.SubscriptionInfo;import android.telephony.SubscriptionManager;
+import android.telephony.euicc.EuiccManager;import android.util.ArrayMap;
+import android.util.Log;import androidx.lifecycle.Lifecycle;import androidx.lifecycle.LifecycleObserver;
@@ -122,7 +124,7 @@ public class MobileNetworkListController extends AbstractPreferenceController im} else {pref.setSummary(R.string.mobile_network_inactive_esim);/// M: Add for updating enabled state.
-                    pref.setEnabled(false);
+                    //pref.setEnabled(false);}} else {if (mSubscriptionManager.isActiveSubscriptionId(subId)) {
@@ -130,7 +132,7 @@ public class MobileNetworkListController extends AbstractPreferenceController im} else if (SubscriptionUtil.showToggleForPhysicalSim(mSubscriptionManager)) {pref.setSummary(mContext.getString(R.string.mobile_network_inactive_sim));/// M: Add for updating enabled state.
-                    pref.setEnabled(false);
+                    //pref.setEnabled(false);} else {pref.setSummary(mContext.getString(R.string.mobile_network_tap_to_activate,displayName));
@@ -138,7 +140,14 @@ public class MobileNetworkListController extends AbstractPreferenceController im}pref.setOnPreferenceClickListener(clickedPref -> {
-                if (!info.isEmbedded() && !mSubscriptionManager.isActiveSubscriptionId(subId)
+                Log.d(TAG, "clickedPref isEmbedded: " + (info.isEmbedded()));
+                               Log.d(TAG, "clickedPref isActiveSubscriptionId: " + (mSubscriptionManager.isActiveSubscriptionId(subId)));
+                Log.d(TAG, "clickedPref showToggleForPhysicalSim: " + (SubscriptionUtil.showToggleForPhysicalSim(mSubscriptionManager)));
+                               /// M: Add for updating enabled state.
+                               if(info.isEmbedded()){
+                                       Intent intent = new Intent(EuiccManager.ACTION_MANAGE_EMBEDDED_SUBSCRIPTIONS);
+                                       mContext.startActivity(intent);
+                }else if (!info.isEmbedded() && !mSubscriptionManager.isActiveSubscriptionId(subId)&& !SubscriptionUtil.showToggleForPhysicalSim(mSubscriptionManager)) {SubscriptionUtil.startToggleSubscriptionDialogActivity(mContext, subId, true);} else {
--- a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/network/MobileNetworkSummaryController.java
+++ b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/network/MobileNetworkSummaryController.java
@@ -258,8 +258,17 @@ public class MobileNetworkSummaryController extends AbstractPreferenceControllermPreference.setEnabled(false);}/// @}
-        } else {
-            mPreference.setFragment(MobileNetworkListFragment.class.getCanonicalName());
+        } else {                       
+                       /// M: Add for updating enabled state.
+                       mPreference.setOnPreferenceClickListener((Preference pref) -> {
+                logPreferenceClick(pref);
+
+                Intent intent = new Intent(EuiccManager.ACTION_MANAGE_EMBEDDED_SUBSCRIPTIONS);
+                               mContext.startActivity(intent);
+                return true;
+            });
+                       
+            //mPreference.setFragment(MobileNetworkListFragment.class.getCanonicalName());}}
--- a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/network/telephony/MobileNetworkSettings.java
+++ b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/network/telephony/MobileNetworkSettings.java
@@ -27,6 +27,7 @@ import android.provider.Settings;import android.provider.SearchIndexableResource;import android.telephony.SubscriptionManager;import android.telephony.TelephonyManager;
+import android.telephony.euicc.EuiccManager;import android.text.TextUtils;import android.util.Log;import android.view.Menu;
@@ -100,8 +101,12 @@ public class MobileNetworkSettings extends AbstractMobileNetworkSettings {return true;}final String key = preference.getKey();
+               
+               Intent intent = new Intent(EuiccManager.ACTION_MANAGE_EMBEDDED_SUBSCRIPTIONS);
+               startActivity(intent);
+               return true;-        if (TextUtils.equals(key, BUTTON_CDMA_SYSTEM_SELECT_KEY)
+        /*if (TextUtils.equals(key, BUTTON_CDMA_SYSTEM_SELECT_KEY)|| TextUtils.equals(key, BUTTON_CDMA_SUBSCRIPTION_KEY)) {if (mTelephonyManager.getEmergencyCallbackMode()) {startActivityForResult(
@@ -112,7 +117,7 @@ public class MobileNetworkSettings extends AbstractMobileNetworkSettings {return true;}-        return false;
+        return false;*/}@Override
diff --git a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/security/SimLockPreferenceController.java b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/security/SimLockPreferenceController.java
index 3b85888..98cbc9b 100644
--- a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/security/SimLockPreferenceController.java
+++ b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/security/SimLockPreferenceController.java
@@ -94,10 +94,10 @@ public class SimLockPreferenceController extends BasePreferenceController {for (SubscriptionInfo subInfo : subInfoList) {final int simState = mTelephonyManager.getSimState(subInfo.getSimSlotIndex());
-            if ((simState != TelephonyManager.SIM_STATE_ABSENT)
-                    && (simState != TelephonyManager.SIM_STATE_UNKNOWN)) {
+            // if ((simState != TelephonyManager.SIM_STATE_ABSENT)
+            //         && (simState != TelephonyManager.SIM_STATE_UNKNOWN)) {return true;
-            }
+            // }}return false;}

MTK8766下载完ESIM卡号之后，有信号，能ping通百度，但是浏览器无法上网，最终定位是他们默认APN配置的问题

--- a/device/mediatek/config/apns-conf.xml
+++ b/device/mediatek/config/apns-conf.xml
@@ -25782,12 +25782,12 @@mcc="454"mnc="00"apn="mobile"
-       proxy="192.168.59.51"
-       port="8080"
-       mmsc="http://192.168.58.171:8002"
-       mmsproxy="192.168.59.51"
-       mmsport="8080"
-       type="default,supl,mms"
+       proxy=""
+       port=""
+       mmsc=""
+       mmsproxy=""
+       mmsport=""
+       type="default,ia,supl"protocol="IPV4V6"roaming_protocol="IPV4V6"/>