需要獲取simunlockstate狀態，而這個不由我們這邊控制，在免于提Mtk case的情況下，通過Telephony獲取這個值，telephony是個服務apk，不能通過android.bp引入，考慮到這個原因，我覺得通過aidl以telephony為服務器端，MtkSettings為客戶端，進行跨進程通信。下面說下步驟：
1.在服務器端新建aidl目錄和文件，這里通過AndroidStudio去生成(New -> Aidl ->AIDL File)。生成完后記得rebuild一下，但是我這個是源碼工程，rebuild后肯定會報錯，但只要生成aidl生成了相應的派生類那就沒關系。

// INetworkUnlockStatus.aidl package com.android;// Declare any non-default types here with import statementsinterface INetworkUnlockStatus {int getNetworkUnlockStatus(); }

2.服務器端建立service

public class NetworkUnlockService extends Service {private final String TAG = "NetworkUnlockService";@Overridepublic IBinder onBind(Intent intent) {Log.d(TAG, "getNetworkUnlockStatus has onBind");return mUnlockManager;}private final INetworkUnlockStatus.Stub mUnlockManager = new INetworkUnlockStatus.Stub() {@Overridepublic int getNetworkUnlockStatus() throws RemoteException {Log.d(TAG, "getNetworkUnlockStatus has exec");return getState();}};int getState() {MtkPhoneInterfaceManagerEx mtkPhoneInterfaceManagerEx = MtkPhoneInterfaceManagerEx.init((PhoneGlobals) getApplicationContext());int simLockStateForRSU = mtkPhoneInterfaceManagerEx.getSimLockStateForRSU(0);return simLockStateForRSU;}}

記得聲明下并且export為true:

<service android:name=".NetworkUnlockService"android:exported="true"android:enabled="true"><intent-filter><action android:name="com.unlock.state.aidl"/><category android:name="android.intent.category.DEFAULT"/></intent-filter></service>

3.移植aidl包到客戶端主目錄，和main同級即可，確保包名一致
4.客戶端合適的時機去啟動遠程service：

Intent intent = new Intent();intent.setAction("com.unlock.state.aidl");intent.setPackage("com.android.phone");mContext.bindServiceAsUser(intent, mCon, Context.BIND_AUTO_CREATE, UserHandle.CURRENT);

ServiceConnection:

private ServiceConnection mCon = new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {Log.d(TAG, "onServiceConnected");INetworkUnlockStatus asInterface = INetworkUnlockStatus.Stub.asInterface(service);if (null != asInterface) {try {networkUnlockStatus = asInterface.getNetworkUnlockStatus();Log.d(TAG, "onServiceConnected networkUnlockStatus:" + networkUnlockStatus);} catch (RemoteException e) {Log.d(TAG, "onServiceConnected RemoteException e:" + e.getMessage());e.printStackTrace();}}}@Overridepublic void onServiceDisconnected(ComponentName name) {Log.d(TAG, "onServiceDisconnected");}};

注意，如果用的是bindService會爆錯誤無法運行Calling a method in the system process without a qualified user，根據源碼就知道需要調用bindServiceAsUser，其實bindService后面也是調用了bindServiceAsUser的。

5.由于我這是在源碼層的修改，所以需要在Android.bp進行aidl包的導入，注意在android R之前可能是Android.mk。下面代碼只要看
srcs: [“src/**/*.java”,“aidl/com/android/INetworkUnlockStatus.aidl”],
這個位置即可：

// Build the Settings APK android_library {name: "MtkSettings-core",platform_apis: true,defaults: ["MtkSettingsLibDefaults","SettingsLibDefaults","SettingsLib-search-defaults",],srcs: ["src/**/*.java","aidl/com/android/INetworkUnlockStatus.aidl"],resource_dirs: ["res","res_ext",],static_libs: ["nfc_settings_adapter","androidx-constraintlayout_constraintlayout","androidx.slice_slice-builders","androidx.slice_slice-core","androidx.slice_slice-view","androidx.core_core","androidx.appcompat_appcompat","androidx.cardview_cardview","androidx.preference_preference","androidx.recyclerview_recyclerview","com.google.android.material_material","setupcompat","setupdesign","androidx-constraintlayout_constraintlayout-solver","androidx.lifecycle_lifecycle-runtime","androidx.lifecycle_lifecycle-extensions","guava","jsr305","com.mediatek.lbs.em2.utils","mtksettings-contextual-card-protos-lite","mtksettings-log-bridge-protos-lite","mtkcontextualcards","mtksettings-logtags","com.mediatek.settings.ext","statslog-mtksettings","zxing-core-1.7","android.hardware.dumpstate-V1.0-java","android.hardware.dumpstate-V1.1-java",],libs: ["telephony-common","ims-common","app-compat-annotations","mediatek-telephony-base","mediatek-telephony-common","mediatek-common","mediatek-framework","mediatek-ims-common",], }

Telephony的Android.bp也是一樣，我就不重復了。
客戶端調用完整代碼：

public class NetworkUnlockPreferenceController extends BasePreferenceController implements PreferenceManager.OnActivityStopListener {private Context mContext;String packageName = "com.assurance.rsuapp";String className = "com.tmobile.rsuapp.MainActivity";private String TAG = "NetworkUnlockPreferenceController";private int networkUnlockStatus;public NetworkUnlockPreferenceController(Context context, String preferenceKey) {super(context, preferenceKey);mContext = context;}@Overridepublic int getAvailabilityStatus() {return AVAILABLE;}@Overridepublic void displayPreference(PreferenceScreen screen) {super.displayPreference(screen);}@Overridepublic boolean handlePreferenceTreeClick(Preference preference) {if (!TextUtils.equals(preference.getKey(), getPreferenceKey())) {return false;}ComponentName componentName = new ComponentName(packageName, className);startApp(componentName, null);return true;}@Overridepublic CharSequence getSummary() {startUnlockStatusService();String state = "";switch (networkUnlockStatus) {case 0:state = mContext.getResources().getString(R.string.locked_status);break;case 1:state = mContext.getResources().getString(R.string.temporarily_locked_status);break;case 2:state = mContext.getResources().getString(R.string.permanently_locked_status);break;}return state;}@TargetApi(Build.VERSION_CODES.DONUT)private void startUnlockStatusService() {Intent intent = new Intent();intent.setAction("com.unlock.state.aidl");intent.setPackage("com.android.phone");mContext.bindServiceAsUser(intent, mCon, Context.BIND_AUTO_CREATE, UserHandle.CURRENT);}private ServiceConnection mCon = new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {Log.d(TAG, "onServiceConnected");INetworkUnlockStatus asInterface = INetworkUnlockStatus.Stub.asInterface(service);if (null != asInterface) {try {networkUnlockStatus = asInterface.getNetworkUnlockStatus();Log.d(TAG, "onServiceConnected networkUnlockStatus:" + networkUnlockStatus);} catch (RemoteException e) {Log.d(TAG, "onServiceConnected RemoteException e:" + e.getMessage());e.printStackTrace();}}}@Overridepublic void onServiceDisconnected(ComponentName name) {Log.d(TAG, "onServiceDisconnected");}};private void startApp(ComponentName com, String param) {if (com != null) {PackageInfo packageInfo;try {packageInfo = mContext.getPackageManager().getPackageInfo(com.getPackageName(), 0);} catch (PackageManager.NameNotFoundException e) {packageInfo = null;e.printStackTrace();}try {Intent intent = new Intent();intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setComponent(com);if (param != null) {Bundle bundle = new Bundle();bundle.putString("flag", param);intent.putExtras(bundle);}mContext.startActivity(intent);} catch (Exception e) {Log.e(TAG, "Exception", e);}}}@Overridepublic void onActivityStop() {mContext.unbindService(mCon);} }

6.需要注意的是，我在preference里綁定的service，而preference類似activity，fragment的生命周期，所以我實現PreferenceManager.OnActivityStopListener，在對應的Activity銷毀的時候進行解綁service。另外，Telephony編譯生成的apk是不能直接adb install -r安裝的，也不能直接push，需要先刪除之前的telephony即可push，然后reboot就能生效，MtkSettings的話可以直接install -r，也不要重啟。

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