安(an)卓原生框架(jia)層代碼位于frameworks目錄下，在(zai)這里基于vendor目錄下的ctyun-framework添(tian)加一個自定義(yi)的系統服務，并在(zai)system server中進行啟動。以ApplicationAccessManagerService為例。
1.添加自定義服務。
一個系統服務(wu)需(xu)要(yao)包含(han)manager類和(he)service實現，通過aidl進行通信。首先新(xin)建以下三個文件(jian)定義接口功(gong)能。
1.1 IApplicationAccessManager.aidl
在/vendor/ctyun/source/frameworks/core/java/android/app/下添加aidl文件，定義API。
interface IApplicationAccessManager {
// add your method here
}1.2 ApplicationAccessManager.java
在/vendor/ctyun/source/frameworks/core/java/android/app/下添加manager文件(jian)，實現(xian)第三(san)方調用接口。
public class ApplicationAccessManager {
Context mContext;
IApplicationAccessManager mApplicationAccessManagerService;
public ApplicationAccessManager(Context context, IApplicationAccessManager aam) {
mContext = context;
mApplicationAccessManagerService = aam;
}
//......
}1.3 ApplicationAccessManagerService.java
在/vendor/ctyun/source/frameworks/services/core/java/com/android/server/下添加(jia)service文(wen)件，實現(xian)服(fu)務端邏輯(ji)。
public class ApplicationAccessManagerService extends IApplicationAccessManager.Stub {
private static final String TAG = "ApplicationAccessManagerService";
public ApplicationAccessManagerService(Context context){
//.....
}
//@Override
//......
}2. 修改Android.bp，聲明新增的aidl
在/vendor/ctyun/source/frameworks/Android.bp中聲明新增(zeng)aidl編(bian)譯，這(zhe)樣編(bian)譯時才會(hui)生(sheng)成IApplicationAccessManager類。
java_library {
name: "ctyun-framework",
srcs: [
......
"core/java/android/app/IApplicationAccessManager.aidl",
......
],
......
}3. 聲明service name
在/vendor/ctyun/source/frameworks/core/java/android/content/ContextExternal.java中聲(sheng)明系統服務的service name。
public static final String APP_ACCESS_SERVICE = "app_access";4. 注冊service
在(zai)/vendor/ctyun/source/frameworks/services/core/java/com/android/server/SystemServerExternal的(de)startExternalServices()方(fang)法中注冊服務，開機自啟(qi)動(dong)。
private void startApplicationAccessManagerService() {
try {
ServiceManager.addService(ContextExternal.APP_ACCESS_SERVICE, new ApplicationAccessManagerService(mSystemContext));
} catch (Exception e) {
e.printStackTrace();
}
}5. 注冊manager
在/vendor/ctyun/source/frameworks/core/java/android/app/ExternalSystemServiceManager中注冊自定義的manager，綁定service name和manager實例。
registerExternalService(ContextExternal.APP_ACCESS_SERVICE, ApplicationAccessManager.class,
new ExternalCachedServiceFetcher<ApplicationAccessManager>() {
@Override
public ApplicationAccessManager createService(Context ctx) throws ServiceManager.ServiceNotFoundException {
IBinder b = ServiceManager.getServiceOrThrow(ContextExternal.APP_ACCESS_SERVICE);
IApplicationAccessManager service = IApplicationAccessManager.Stub.asInterface(b);
return new ApplicationAccessManager(ctx, service);
}});
