{"id":5578,"date":"2026-06-28T22:39:04","date_gmt":"2026-06-28T14:39:04","guid":{"rendered":"https:\/\/blog.coderfan.org\/?p=5578"},"modified":"2026-06-29T09:54:57","modified_gmt":"2026-06-29T01:54:57","slug":"openharmony-service-manageent-framework-samgr","status":"publish","type":"post","link":"https:\/\/blog.coderfan.org\/en\/openharmony-service-manageent-framework-samgr.html","title":{"rendered":"OpenHarmony\u7cfb\u7edf\u670d\u52a1\u6846\u67b6SAMGR\u89e3\u6790"},"content":{"rendered":"
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\n \t<\/i> Read Time:<\/span>3 Minute, 29 Second <\/div>\n\n <\/div>\n

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\u5728\u5b89\u5353\u7cfb\u7edf\u4e2d\uff0c\u7cfb\u7edf\u670d\u52a1\u6846\u67b6\u57fa\u4e8eServiceManager\u3002\u4ee5Native\u670d\u52a1\u4e3a\u4f8b\uff0c\u8981\u6ce8\u518c\u53d1\u5e03\u4e00\u4e2a\u670d\u52a1\u6d89\u53ca\u5230\u542f\u52a8\u914d\u7f6e(rc)\u3001\u4ee5\u53ca\u4ee3\u7801\u4e0a\u7684\u7ee7\u627f\u5b9e\u73b0\u3002\u901a\u5e38\u5206\u4e3a\u4ee5\u4e0b\u51e0\u6b65\uff1a<\/p>\n\n\n\n

\/\/rc\u914d\u7f6e\nservice evs_app \/system\/bin\/evs_app\n    class hal\n    priority -20\n    user automotive_evs\n    group automotive_evs\n    disabled\non late-init\n    start evs_app\n\n\/\/\u4ee3\u7801\u5b9e\u73b0\n1.Main\u51fd\u6570\u4e2d\u914d\u7f6ebinder\u7ebf\u7a0b\u6c60\nhardware::configureRpcThreadpool(5, \/*willjoin*\/ false);\n2.Main\u51fd\u6570\u4e2d\u521d\u59cb\u5316binder\u901a\u4fe1\u57fa\u7840\nsp<ProcessState> proc(ProcessState::self());\n3.Main\u51fd\u6570\u4e2d\u83b7\u53d6ServiceManager\uff0c\u4e0eServiceManager\u5efa\u7acb\u8fde\u63a5\nsp<IServiceManager> sm = defaultServiceManager();\n4.Main\u51fd\u6570\u4e2d\u8fdb\u884c\u670d\u52a1\u53d1\u5e03\nxxxxService::instantiate();\n5.\u542f\u52a8\u4e0e\u52a0\u5165\u7ebf\u7a0b\u6c60\nProcessState::self()->startThreadPool();\nIPCThreadState::self()->joinThreadPool();<\/code><\/pre>\n\n\n\n
\u800c\u5728OpenHarmony\u7cfb\u7edf\u4e2d\uff0c\u7cfb\u7edf\u670d\u52a1\u6846\u67b6\u4e3aSAMGR\uff0c\u4e5f\u5c31\u662fSystemAbility Manager\u3002\u5176\u4e0e\u5b89\u5353\u7cfb\u7edf\u7684ServiceManager\u5b58\u5728\u5f88\u5927\u7684\u533a\u522b\uff0c\u4e3b\u8981\u7684\u5dee\u5f02\u70b9\u5305\u62ec\uff1a<\/p>\n\n\n\n
1.\u5f00\u53d1\u8005\u4e0d\u518d\u9700\u8981\u5b9e\u73b0Main\u51fd\u6570\uff0c\u670d\u52a1\u542f\u52a8\u7edf\u4e00\u7531sa_mian\u8fdb\u884c\u52a0\u8f7d<\/p>\n\n\n\n
2.\u5f00\u53d1\u8005\u9700\u8981\u5b9e\u73b0\u56fa\u5b9a\u7684\u63a5\u53e3\uff0c\u5e76\u5c06\u5176\u7f16\u8bd1\u4e3a\u5171\u4eab\u5e93\uff0csa_main\u5c06\u901a\u8fc7dlopen\u7684\u65b9\u5f0f\u8fdb\u884c\u52a0\u8f7d <\/p>\n\n\n\n
3.\u6bcf\u4e2a\u670d\u52a1\u90fd\u9700\u8981\u989d\u5916\u7684\u914d\u7f6e\u6587\u4ef6\uff0csa_main\u8d1f\u8d23\u89e3\u6790\u5e76\u4f9d\u636e\u914d\u7f6e\u8fdb\u884c\u542f\u52a8  <\/p>\n\n\n\n
\u670d\u52a1\u5b9e\u73b0<\/h2>\n\n\n\n
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\u5934\u6587\u4ef6\u5b9e\u73b0\uff1a<\/p>\n\n\n\n
\/\/MyService.h\n\/\/\u4ee5\u4e0b\u5934\u6587\u4ef6\u6765\u81ea\u4e8eOpenHarmony OS\n#include \"singleton.h\"\n#include \"iremote_object.h\"\n#include \"system_ability.h\"\n#include \"ipc_object_stub.h\"\n\nclass MyService : public OHOS::SystemAbility, public OHOS::IPCObjectStub, public OHOS::IRemoteObject::DeathRecipient, public OHOS::DelayedRefSingleton< MyService > \n{\n         \/\/\u6784\u9020\u51fd\u6570&\u865a\u6784\u51fd\u6570\nMyService(int32_t systemAbilityId = 5002, bool runOnCreate = true);\n         virtual ~ MyService ();\n         \n        \/\/\u5355\u4f8b\u5b9e\u73b0\n        static MyService& GetInstance()\n        {\n            return DelayedRefSingleton< MyService>::GetInstance();\n        }\n\n        \/\/\u7ee7\u627f\u81ea\u516c\u6709\u7c7b\u7684\u63a5\u53e3\n        std::string GetClassName() override;\n        void OnDump() override;\n        \/\/\u670d\u52a1\u542f\u52a8\n        void OnStart() override;\n       \/\/\u670d\u52a1\u7ec8\u6b62\n        void OnStop() override;\n        void OnRemoteDied(const OHOS::wptr<OHOS::IRemoteObject> &object) override;\n}<\/code><\/pre>\n\n\n\n
\u6e90\u6587\u4ef6\u5b9e\u73b0\uff1a<\/p>\n\n\n\n
\/\/MyService.cpp\n#include <stdio.h>\n#include <errno.h>\n#include <unistd.h>\n#include <pthread.h>\n#include <sys\/wait.h>\n#include <sys\/syscall.h>\n#include <linux\/audit.h>\n#include \"log.h\"\n#include \"MyService.h\"\n\n#define LOG_TAG \" MyService\"\n\nusing namespace std;\nusing namespace OHOS;\n\n\/\/ Static function for pthread\nstatic void* InitThreadFunc(void* arg)\n{\n    MyService* self = static_cast< MyService*>(arg);\n    self->init();\n    return nullptr;\n}\n\/\/\u6784\u9020\u51fd\u6570\n\/\/\u9700\u8981\u6ce8\u610f\u8fd9\u91cc\u7684systemAbilityId\u4e0exml\u4e2d\u914d\u7f6e\u7684\u9700\u8981\u4fdd\u6301\u4e00\u81f4\nMyService::MyService(int32_t systemAbilityId, bool runOnCreate) : SystemAbility(systemAbilityId, runOnCreate), IPCObjectStub(OHOS::to_utf16(\"MyService\"))\n{\n    HILOGI(LOG_TAG, \" MyService constructor called, saId=%{public}d, runOnCreate=%{public}d\", systemAbilityId, runOnCreate);\n}\n\/\/\u6790\u6784\u51fd\u6570\nMyService::~ MyService() \n{\n\n}\n\n\/\/\u91cd\u8981\uff0c\u5fc5\u987b\u5b9e\u73b0\nstd::string MyService::GetClassName()\n{\n    return \"MyService\";\n}\n\n\nvoid MyService::OnDump()\n{\n    HILOGI(LOG_TAG, \"MyService OnDump\");\n}\n\nvoid MyService::init(void) \n{\n    HILOGI(LOG_TAG, \"MyService::init() called, entering loop\");\n    while(1)\n    {\n        \/\/\u670d\u52a1\u5faa\u73af\u4f53\n    }\n}\n\nvoid MyService::OnStart()\n{\n    OHOS::SystemAbility::OnStart();\n    \n    sptr<OHOS::IRemoteObject> remoteObject = this;\n    bool result = Publish(remoteObject);\n    if (!result) {\n        HILOGE(LOG_TAG, \" MyService start failed! Publish returned false\");\n        return;\n    }\n    \n    \/\/ Start init() in a separate thread to avoid blocking OnStart()\n    pthread_t threadId;\n    int ret = pthread_create(&threadId, nullptr, InitThreadFunc, this);\n    if (ret != 0) {\n        HILOGE(LOG_TAG, \"Failed to create init thread, error: %{public}d\", ret);\n    } else {\n        HILOGI(LOG_TAG, \"Init thread created successfully\");\n        pthread_detach(threadId);\n    }\n}\n\n\/\/\u91cd\u8f7d\u5b9e\u73b0onStop\nvoid MyService::OnStop()\n{\n    HILOGI(LOG_TAG, \" MyService OnStop\");\n    OHOS::SystemAbility::OnStop();\n}\n\n\/\/\u91cd\u8f7d\u5b9e\u73b0onRemoteDied\nVoid MyService::OnRemoteDied(const OHOS::wptr<OHOS::IRemoteObject> &object)\n{\n    (void)object;\n    HILOGW(LOG_TAG, \"OnRemoteDied.\");\n}\n\n\/\/ Register SystemAbility when library is loaded\n\/\/ This is called automatically when the library is loaded by sa_main\nREGISTER_SYSTEM_ABILITY_BY_ID(MyService, 5002, true);<\/code><\/pre>\n\n\n\n
\u670d\u52a1\u914d\u7f6e<\/h2>\n\n\n\n
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<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<info>\n    <process>vhssrv<\/process>\n    <loadlibs>\n        <libpath>libvhssrv.z.so<\/libpath>\n    <\/loadlibs>\n    <systemability>\n        <name>2654<\/name>\n        <libpath>libvhssrv.z.so<\/libpath>\n        <run-on-create>true<\/run-on-create>\n        <distributed>false<\/distributed>\n        <dump-level>1<\/dump-level>\n    <\/systemability>\n<\/info><\/code><\/pre>\n\n\n\n
\u5728\u8fd9\u4efdxml\u914d\u7f6e\u4e2d\uff0cprocess\u6807\u7b7e\u7528\u4e8e\u8868\u660e\u8be5\u670d\u52a1\u7684\u8fdb\u7a0b\u540d\uff0clibpath\u6807\u7b7e\u7528\u4e8e\u8868\u660esa_main\u542f\u52a8\u670d\u52a1\u65f6\u9700\u8981\u52a0\u8f7d\u7684\u52a8\u6001\u5e93\uff0c\u800cSystemAbility\u6807\u7b7e\u5219\u7528\u4e8e\u5bf9\u8be5\u7cfb\u7edf\u670d\u52a1\u8fdb\u884c\u66f4\u7ec6\u81f4\u7684\u63a7\u5236\u3002<\/p>\n\n\n\n
<name>\u6807\u7b7e\u7528\u4e8e\u8868\u660e\u8be5SA ID\uff0c\u8fd9\u662fSystemAbility\u670d\u52a1\u4e2d\u7684\u552f\u4e00ID\u6807\u8bc6\uff1b\u8be5ID\u5728\u6211\u4eec\u5b9e\u73b0\u670d\u52a1\u65f6\u9700\u8981\u5339\u914d;<\/p>\n\n\n\n
<libpath>\u6807\u7b7e\u7528\u4e8e\u8868\u660e\u8be5SA\u7684\u52a8\u6001\u5e93\u8def\u5f84\uff1b<\/p>\n\n\n\n
<run-on-create>\u6807\u7b7e\u7528\u4e8e\u8868\u660e\u8be5SA\u662f\u5426\u81ea\u542f\u52a8,true\u5373\u4ee3\u8868\u9700\u8981\u81ea\u542f\u52a8,false\u5219\u65e0\u9700\u81ea\u542f\u52a8\uff1b<\/p>\n\n\n\n
<distributed>\u6807\u7b7e\u7528\u4e8e\u8868\u660e\u8be5SA\u662f\u5426\u652f\u6301\u5206\u5e03\u5f0f\u8bbf\u95ee;<\/p>\n\n\n\n
<dump-level>\u6807\u7b7e\u7528\u4e8e\u914d\u7f6e\u7ba1\u7406\u548c\u8c03\u8bd5\u6743\u9650;<\/p>\n\n\n\n
\u540c\u65f6\uff0c\u6211\u4eec\u5728rc\u542f\u52a8\u914d\u7f6e\u4e2d\u9700\u8981\u5bf9sa_main\u7684\u542f\u52a8\u8fdb\u884c\u663e\u5f0f\u8bf4\u660e\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n
service sai-daemon  \/system\/bin\/sa_main  \/system\/profile\/sai_daemon.xml\n    class core\n    user root\n    group root\n    seclabel u:r:su:s0<\/code><\/pre>\n\n\n\n
\u8fd9\u91ccsai-daemon\u670d\u52a1\uff0c\u5c31\u662f\u901a\u8fc7sa_main\u8bfb\u53d6\/system\/profile\/sai_daemon.xml\u4e2d\u7684\u914d\u7f6e\uff0c\u4ece\u800c\u5c06\u670d\u52a1\u6ce8\u518c\u5230SAMGR\u4e2d\u3002<\/p>\n\n\n\n
\u670d\u52a1\u83b7\u53d6<\/h2>\n\n\n\n
\u5f53\u6211\u4eec\u7684\u670d\u52a1\u542f\u52a8\u540e\uff0c\u6211\u4eec\u5982\u4f55\u5728\u5176\u4ed6\u7684\u8fdb\u7a0b\u4e2d(Client)\u83b7\u53d6\u8be5\u670d\u52a1\u5e76\u5efa\u7acb\u8fde\u63a5\u5462\u3002<\/p>\n\n\n\n
\u7b80\u5355\u6765\u8bf4\uff0cClient\u53ef\u4f7f\u7528 SystemAbilityManagerClient<\/code> \u83b7\u53d6 SystemAbilityManager<\/code> \u5b9e\u4f8b\uff0c\u7136\u540e\u8c03\u7528 GetSystemAbility<\/code> \u83b7\u53d6\u670d\u52a1\u7684\u4ee3\u7406\u5bf9\u8c61\uff08IRemoteObject<\/code>\uff09\u3002<\/p>\n\n\n\n
#include \"isystem_ability_manager.h\"\n#include \"if_system_ability_manager.h\"\n#include \"iservice_registry.h\"\n\n\/\/ 1. \u83b7\u53d6 SystemAbilityManager \u5355\u4f8b\u5b9e\u4f8b\nsptr<ISystemAbilityManager> sam = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();\nif (sam == nullptr) {\n    \/\/ \u5904\u7406\u83b7\u53d6\u5931\u8d25\u903b\u8f91\n    return;\n}\n\n\/\/ 2. \u6307\u5b9a\u60f3\u8981\u83b7\u53d6\u7684 SA \u7684 ID (\u4f8b\u5982\uff1aSAMPLE_SERVICE_ID)\nint32_t systemAbilityId = 1234; \n\n\/\/ 3. \u5411 SAMGR \u83b7\u53d6\u670d\u52a1\u4ee3\u7406\u5bf9\u8c61\nsptr<IRemoteObject> remoteObject = sam->GetSystemAbility(systemAbilityId);\nif (remoteObject == nullptr) {\n    \/\/ \u5904\u7406\u627e\u4e0d\u5230\u670d\u52a1\u903b\u8f91\n    return;\n}\n\n\/\/ 4. \u5c06 remoteObject \u8f6c\u6362\u4e3a\u5177\u4f53\u7684\u670d\u52a1\u4ee3\u7406\u7c7b\uff08\u5982 ISampleService\uff09\n\/\/ sptr<ISampleService> serviceProxy = iface_cast<ISampleService>(remoteObject);\n<\/code><\/pre>\n\n\n\n
<\/p>\n        
\n            
\n                \n                
\n                    \n                        \"Happy\"\n                    <\/a>\n                    
\n                        Happy                    <\/div>\n                    
\n                                                    0<\/span>\n                        \n                                                0<\/span> %<\/span>\n                                            <\/div>\n                <\/div>\n\n                
\n                    \n                        \"Sad\"\n                    <\/a>\n                    
\n                        Sad                    <\/div>\n                    
\n                                                    0<\/span>\n                                                                        0<\/span> %<\/span>\n                                            <\/div>\n                <\/div>\n\n                
\n                    \n                        \"Excited\"\n                    <\/a>\n                    
\n                        Excited                    <\/div>\n                    
\n                                                    0<\/span>\n                                                                        0<\/span> %<\/span>\n                                            <\/div>\n                <\/div>\n\n                
\n                    \n                        \"Sleepy\"\n                    <\/a>\n                    
\n                        Sleepy                    <\/div>\n                    
\n                                                    0<\/span>\n                        \n                                                0<\/span> %<\/span>\n                                            <\/div>\n                <\/div>\n\n                
\n                    \n                        \"Angry\"\n                    <\/a>\n                    
Angry<\/div>\n                    
\n                                                    0<\/span>\n                                                                        0<\/span> %<\/span>\n                        \n                    <\/div>\n                <\/div>\n\n                
\n                    \n                        \"Surprise\"\n                    <\/a>\n                    
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