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网站建设 业务员提成,池州建行网站,专业网站建设制作,外宣做网站宣传AIDL (Android Interface Definition Language) 和 HIDL (HAL Interface Definition Language) 都是 Android 系统中用于定义接口的工具#xff0c;但它们有不同的用途和特性。 AIDL (Android Interface Definition Language) 用途#xff1a; 主要用于应用程序之间的进程间…AIDL (Android Interface Definition Language) 和 HIDL (HAL Interface Definition Language) 都是 Android 系统中用于定义接口的工具但它们有不同的用途和特性。 AIDL (Android Interface Definition Language) 用途 主要用于应用程序之间的进程间通信 (IPC)。适用于定义应用程序组件如 Activity 和 Service之间的接口。 HIDL (HAL Interface Definition Language) 用途 主要用于定义硬件抽象层 (HAL) 接口。适用于访问底层硬件功能如摄像头、传感器等。 未来趋势 从 Android 13 开始HIDL 已被弃用建议使用 AIDL 来实现 HAL 接口⁴。这意味着未来的 Android 版本将更多地依赖 AIDL 来实现硬件抽象层的接口。 本文主要记录自己实现一个AIDL的过程 主要的架构逻辑 1.使能hidl-gen工具 source build/envsetup.sh lunch rk3588_s-userdebug make hidl-gen 2.建立自己的AIDL ,test目录 和ITest.hal,ITestWarpper.hal 1.mkdir vendor/rockchip/hardware/interfaces/test 2.mkdir vendor/rockchip/hardware/interfaces/test/1.03.新建ITest.hal文件 //vendor/rockchip/hardware/interfaces/test/1.0/ITest.hal package rockchip.hardware.test1.0; import ITestWarpper;interface ITest {setTestWarpper(ITestWarpper testWarpper);GetString()generates (string printString); };4.新建ITestWarpper.hal文件 用于数据传递 //vendor/rockchip/hardware/interfaces/test/1.0/ITestWarpper.hal package rockchip.hardware.test1.0; interface ITestWarpper {GetString()generates (string printString); }; 生成编译文件vendor/rockchip/hardware/interfaces/test/1.0/Android.bp   do_makefiles_update rockchip.hardware:vendor/rockchip/hardware android.hardware:hardware/interfaces android.hidl:system/libhidl/transport AIDL 的没有返回值都是VOID 出参都是 generates (string printString);实现类似C的别名功能 生成对应的CPP和头文件 1.hidl-gen -o vendor/rockchip/hardware/test/1.0/defualt -Lc-impl -rrockchip.hardware:vendor/rockchip/hardware -randroid.hidl:system/libhidl/transport rockchip.hardware //生成C 和 H2.hidl-gen -o vendor/rockchip/hardware/test/1.0/defualt -Landroidbp-impl -rrockchip.hardware:vendor/rockchip/hardware/ -randroid.hidl:system/libhidl/transport rockchip.hardware //生成Android.dp在defult 目录下生成对应的cpp文件和头文件,Android.bp 也可以使用我写的脚本生成对应的文件 ./generate-source2.sh vendor/rockchip/hardware/interfaces/ test rockchip.hardware  #! /bin/bash

v1.0if [ -z $1 ]; thenecho Please input path exit 1

elseLOC\(1 fiif [ -z \)2 ]; thenecho Please input module nameexit 1 elseMODULE\(2 fiif [ -z \)3 ]; thenecho Please input package headexit 1 elsePACKAGE_HEAD\(3 fiPACKAGE\)PACKAGE_HEAD.\(MODULE1.0 echo You package is: \)PACKAGEhidl-gen -o \(LOC/\)MODULE/1.0/defualt -Lc-impl -r\(PACKAGE_HEAD:\)LOC -randroid.hidl:system/libhidl/transport \(PACKAGE hidl-gen -o \)LOC/\(MODULE/1.0/defualt -Landroidbp-impl -r\)PACKAGE_HEAD:\(LOC \-randroid.hidl:system/libhidl/transport \)PACKAGE 修改Test.cpp Test.h // FIXME: your file license if you have one#include Test.h #include log/log.h #define LOG_TAG test1.0 namespace rockchip::hardware::test::implementation { sp::rockchip::hardware::test::V1_0::ITestWarpper mTestWarpper nullptr; hidl_string mDeviceId; // Methods from ::rockchip::hardware::test::V1_0::ITest follow. Returnvoid Test::setTestWarpper(const sp::rockchip::hardware::test::V1_0::ITestWarpper testWarpper) {// TODO implementmTestWarpper testWarpper;return Void(); }Test::Test(){ALOGD(%s.,FUNCTION); } Test::~Test(){ALOGD(%s,FUNCTION); } V1_0::ITest* HIDL_FETCH_ITest(const char* /* name /) {ALOGD(%s,FUNCTION);return new Test(); } // [](const ::android::hardware::hidl_string id Returnvoid Test::GetString(GetString_cb _hidl_cb) {ALOGD(%s,mDeviceId%s,FUNCTION,mDeviceId.c_str());// TODO implementif(mTestWarpper!nullptr){mTestWarpper-GetString({ALOGD(%s,GetString mDeviceId%s,FUNCTION,id.c_str());_hidl_cb(id);});}return Void(); }// Methods from ::android::hidl::base::V1_0::IBase follow.//ITest HIDL_FETCH_ITest(const char* /* name /) {//return new Test(); //} // } // namespace rockchip::hardware::test::implementation // FIXME: your file license if you have one#pragma once#include rockchip/hardware/test/1.0/ITest.h #include hidl/MQDescriptor.h #include hidl/Status.hnamespace rockchip::hardware::test::implementation {using ::android::hardware::hidl_array; using ::android::hardware::hidl_memory; using ::android::hardware::hidl_string; using ::android::hardware::hidl_vec; using ::android::hardware::Return; using ::android::hardware::Void; using ::android::sp;struct Test : public V1_0::ITest {// Methods from ::rockchip::hardware::test::V1_0::ITest follow.Returnvoid setTestWarpper(const sp::rockchip::hardware::test::V1_0::ITestWarpper testWarpper) override;Returnvoid GetString(GetString_cb _hidl_cb) override;Test();~Test();// Methods from ::android::hidl::base::V1_0::IBase follow.};// FIXME: most likely delete, this is only for passthrough implementations extern C V1_0::ITest HIDL_FETCH_ITest(const char* name);} // namespace rockchip::hardware::test::implementation添加一个开机服务 test/1.0/defualt下添加rc 和 xml文件和service.cpp vendor/rockchip/hardware/interfaces/test/1.0/defualt/rockchip.hardware.test1.0-service.rc service test_server /vendor/bin/hw/rockchip.hardware.test1.0-serviceclass haluser systemgroup systemvendor/rockchip/hardware/interfaces/test/1.0/defualt/rockchip.hardware.test1.0-service.xml manifest version1.0 typedevicehal formathidlnamerockchip.hardware.test/nametransporthwbinder/transportversion1.0/versioninterfacenameITest/nameinstancedefault/instance/interface/hal /manifestvendor/rockchip/hardware/interfaces/test/1.0/defualt/service.cpp #define LOG_TAG rockchip.hardware.test1.0-service#include rockchip/hardware/test/1.0/ITest.h #include hidl/LegacySupport.h #include binder/ProcessState.husing rockchip::hardware::test::V1_0::ITest; using android::hardware::defaultPassthroughServiceImplementation; using android::hardware::configureRpcThreadpool; using android::hardware::joinRpcThreadpool; using android::sp;int main() {android::ProcessState::initWithDriver(/dev/vndbinder);return defaultPassthroughServiceImplementationITest(default, /maxThreads/ 6); } 修改test/1.0/defualt/Android.dp // FIXME: your file license if you have one //生成一个AIDL so cc_library_shared {// FIXME: this should only be -impl for a passthrough hal.// In most cases, to convert this to a binderized implementation, you should:// - change -impl to -service here and make it a cc_binary instead of a// cc_library_shared.// - add a .rc file for this module.// - delete HIDL_FETCH_I functions.// - call configureRpcThreadpool and registerAsService on the instance.// You may also want to append -impl/-service with a specific identifier like// -vendor or -hardware identifier etc to distinguish it.name: rockchip.hardware.test1.0-impl,relative_install_path: hw,// FIXME: this should be vendor: true for modules that will eventually be// on AOSP.proprietary: true,srcs: [Test.cpp,TestWarpper.cpp,],shared_libs: [libhidlbase,libutils,liblog,rockchip.hardware.test1.0,], } //生成一个服务进程cc_binary {name: rockchip.hardware.test1.0-service,init_rc: [rockchip.hardware.test1.0-service.rc],vintf_fragments: [rockchip.hardware.test1.0-service.xml],defaults: [hidl_defaults],proprietary: true,relative_install_path: hw,srcs: [service.cpp,],cflags: [-Werror, -Wno-unused-parameter],shared_libs: [liblog,libhardware,libhidlbase,libutils,libcutils,rockchip.hardware.test1.0,libbinder,libhidlmemory,], }device 下根据自己的代码加入编译 PRODUCT_PACKAGES \ rockchip.hardware.test1.0-service \rockchip.hardware.test1.0-impl 到这里我们的AIDL添加结束 二.修改系统te不然服务跑不起来 添加文件device\rockchip\common\manifests\frameworks\rockchip.hardware.test1.0-service.xml compatibility-matrix version1.0 typeframeworkhal formathidl optionaltruenamerockchip.hardware.test/nameversion1.0/versioninterfacenameITest/nameinstancedefault/instance/interface/hal /compatibility-matrix添加文件device\rockchip\common\sepolicy\vendor\hal_test.te type hal_test_default, domain; type hal_test_default_exec, exec_type, vendor_file_type, file_type;init_daemon_domain(hal_test_default)allow hal_test_default device:dir { read open}; allow hal_test_default camera_device:chr_file{ read write open ioctl }; allow hal_test_default vndbinder_device:chr_file { read write open ioctl map}; allow hal_test_default hidl_base_hwservice:hwservice_manager add; allow hal_test_default hal_test_hwservice:hwservice_manager {add find}; allow system_app hal_test_hwservice:hwservice_manager { find }; binder_call(system_app, hal_test_default) binder_call(hal_test_default, system_app) #binder_call(hal_test_default, platform_app) binder_call(hal_test_default, hwservicemanager) #binder_call(hal_test_default, hal_camera_default)

Client

#allow cameraserver hal_test_hwservice:hwservice_manager { find }; #allow hal_camera_default hal_test_hwservice:hwservice_manager { find }; get_prop(hal_test_default, hwservicemanager_prop)修改device\rockchip\common\sepolicy\vendor\hwservice_contexts rockchip.hardware.tv.input::ITvInput u:object_r:hal_tv_input_hwservice:s0rockchip.hardware.test::ITest u:object_r:hal_test_hwservice:s0修改device\rockchip\common\sepolicy\vendor\hwservice.te type hal_test_hwservice, hwservice_manager_type;三。写一个测试demo 添加cpp和h 生成一个so  //添加packages/apps/libtest_bridge/data_bridge.h // #include jni.h #include functional #include string #include time.hvoid init(); void deinit();//添加packages/apps/libtest_bridge/data_bridge.cpp #define APK_VERSION V1.3 #define LOG_TAG test_bridge //#define LOG_NDEBUG 0#include utils/Log.h #include jni.h #include stdio.h #include stdlib.h #include string.h #include utils/Log.h #include unistd.h #include fcntl.h #include errno.h #include sys/ioctl.h #include sys/mman.h #include linux/videodev2.h #include sys/stat.h #include sys/types.h #include linux/v4l2-subdev.h#include data_bridge.h#include ui/Fence.h #include ui/GraphicBufferMapper.h #include ui/GraphicBuffer.h #include ui/Rect.h#include utils/Singleton.h#define VIRTUAL_CAMERA #define RGA_PROC #include android/hardware_buffer_jni.h #include vndk/hardware_buffer.h#include condition_variable#ifdef RGA_PROC #include RockchipRga.h #include im2d_api/im2d.h #include im2d_api/im2d.hpp #include im2d_api/im2d_common.h #endif#define LOGE(msg,…) ALOGE(%s(%d): msg ,FUNCTION,LINE,##VA_ARGS) #define LOGD(msg,…) ALOGD(%s(%d): msg ,FUNCTION,LINE,##VA_ARGS) #define LOGV(msg,…) ALOGV(%s(%d): msg ,FUNCTION,LINE,##VA_ARGS)using namespace std; using namespace android; #include rockchip/hardware/test/1.0/ITest.h class FrameWarpperImp :public rockchip::hardware::test::V1_0::ITestWarpper{public:android::hardware::Returnvoid GetString(GetString_cb _hidl_cb) {// TODO implement::android::hardware::hidl_string deviceId hellow world;_hidl_cb(deviceId);return android::hardware::Void();}~FrameWarpperImp(){ALOGD(%s,FUNCTION);}FrameWarpperImp(){ALOGD(%s,FUNCTION);} }; FrameWarpperImp frameWarpperImp; void init() {::android::hardware::hidl_string testId;ALOGD(%s,FUNCTION);android::sprockchip::hardware::test::V1_0::ITest client rockchip::hardware::test::V1_0::ITest::getService();if(client.get()! nullptr){ if (frameWarpperImp ! nullptr){client-setTestWarpper(nullptr);frameWarpperImp nullptr;} frameWarpperImp new FrameWarpperImp();ALOGD(setFrameDecorator);client-setTestWarpper(frameWarpperImp);client-GetString({testId id;ALOGD(setFrameDecorator%s,testId.c_str());});} } void deinit(){ALOGD(%s,FUNCTION);android::sprockchip::hardware::test::V1_0::ITest client rockchip::hardware::test::V1_0::ITest::getService();ALOGE(client.get():%p,client.get());if(client.get()! nullptr){ALOGD(setFrameDecorator nullptr);client-setTestWarpper(nullptr);//delete frameWarpperImp ;frameWarpperImp nullptr;} } packages/apps/libtest_bridge/Android.bp //生成一个libtest_bridge.so cc_library_shared {name: libtest_bridge,srcs: [data_bridge.cpp],header_libs: [jni_headers,],include_dirs: [hardware/rockchip/librga,],shared_libs: [libbase,libandroid,liblog,libutils,libcutils,libnativehelper,libhidlbase,libui,librga, //rga_proc librga,rockchip.hardware.test1.0,],cflags: [-Wall,-Wno-error,-Wextra,-Wno-unused-parameter,],sanitize: {scs: true,}, } ndk_library {name: libtest_bridge,symbol_file: libtest_bridge.map.txt,first_version: 30, } prebuilt_etc {name: public.libtest_bridge,src: public.libtest_bridge.txt,filename_from_src: true, }//生成一个可执行文件test1.0_service cc_binary {name: test1.0_service,proprietary: true,relative_install_path: hw,srcs: [service.cpp,],defaults: [hidl_defaults],vendor: true,sdk_version: current,cflags: [-Wall,-Wno-error,-Wextra,-Wno-unused-parameter,],shared_libs: [liblog,libtest_bridge,], } 添加文件packages\apps\libtest_bridge\libtest_bridge.map.txt LIBDATA_BRIDGE {global:init;local:; };添加文件packages\apps\libtest_bridge\public.libtest_bridge.txt libtest_bridge.so nopreload添加文件packages\apps\libtest_bridge\service.cpp #define LOG_TAG rockchip.hardware.test1.0-service #include data_bridge.hint main() {init(); } 编译完成后将系统的test1.0_service 推到 data/loal/tmp 执行./test1.0_service  09-05 07:08:06.633 2892 2892 D data_bridge: init 09-05 07:08:06.634 2892 2892 D data_bridge: FrameWarpperImp 09-05 07:08:06.634 2892 2892 D data_bridge: setFrameDecorator 09-05 07:08:06.635 454 454 D test1.0 : GetString,mDeviceId 09-05 07:08:06.635 454 454 D test1.0 : operator(),GetString mDeviceId 09-05 07:08:06.636 2892 2892 D data_bridge: setFrameDecoratorhellow world 本文章只做自己学习记录