雪亮工程建设网站界面,wordpress基本插件,保定网站制作案例,东道设计公司待遇如何说明#xff1a;aidl for HAL 这种机制#xff0c;可以自动生成java代码#xff0c;app调用可以获取中间过程的jar包#xff0c;结合反射调用 ServiceManager.getService 方法#xff0c;直接获取 HAL 服务#xff0c;不再需要费力在framework层添加代码#xff0c;方便…说明aidl for HAL 这种机制可以自动生成java代码app调用可以获取中间过程的jar包结合反射调用 ServiceManager.getService 方法直接获取 HAL 服务不再需要费力在framework层添加代码方便快捷。
1. 定义aidl接口
hardware/interfaces/test/aidl/android/hardware/test/ITest.aidl
package android.hardware.test;VintfStability
interface ITest {String getMsg();void setMsg(in String msg);
}
2. 创建Android.bp hardware/interfaces/test/aidl/Android.bp
aidl_interface {name: android.hardware.test,vendor: true,srcs: [android/hardware/test/*.aidl],stability: vintf,owner: test,backend: {cpp: {enabled: true,},java: {platform_apis: true,},ndk: {enabled: true,}},
}
3. 编译 mmm hardware/interfaces/test/
4. 编译报错根据提示重新编译生成 aidl api
m android.hardware.test-update-api
5. 生成成功后重新编译
mmm hardware/interfaces/test/
编译成功
6. 实现HAL接口
hardware/interfaces/test/aidl/default/Test.h
#pragma once#include aidl/android/hardware/test/BnTest.hnamespace aidl {
namespace android {
namespace hardware {
namespace test{class Test: public BnTest {public://String getMsg();ndk::ScopedAStatus getMsg(std::string* _aidl_return);//void setMsg(in String msg);ndk::ScopedAStatus setMsg(const std::string msg);private:std::string message ;
};} // namespace test
} // namespace hardware
} // namespace android
} // namespace aidl
hardware/interfaces/test/aidl/default/Test.cpp
#define LOG_TAG Test#include utils/Log.h
#include iostream
#include Test.hnamespace aidl {
namespace android {
namespace hardware {
namespace test{ndk::ScopedAStatus Test::getMsg(std::string* _aidl_ret) {*_aidl_ret message;return ndk::ScopedAStatus::ok();
}ndk::ScopedAStatus Test::setMsg(const std::string msg) {message msg;return ndk::ScopedAStatus::ok();
}} // namespace test
} // namespace hardware
} // namespace android
} // namespace aidl
7. 添加服务
hardware/interfaces/test/aidl/default/main.cpp
#define LOG_TAG Test#include android-base/logging.h
#include android/binder_manager.h
#include android/binder_process.h
#include Test.husing aidl::android::hardware::test::Test;int main() {ABinderProcess_setThreadPoolMaxThreadCount(0); ABinderProcess_startThreadPool();std::shared_ptrTest test ndk::SharedRefBase::makeTest();const std::string desc std::string() Test::descriptor /default;if (test ! nullptr) {if(AServiceManager_addService(test-asBinder().get(), desc.c_str()) ! STATUS_OK) {return -1;}} else {return -1;}ABinderProcess_joinThreadPool();return EXIT_FAILURE;
}
8. init rc
hardware/interfaces/test/aidl/default/android.hardware.test-service.rc
service android.hardware.test-service /vendor/bin/hw/android.hardware.test-serviceinterface aidl android.hardware.test.ITest/defaultclass haluser systemgroup system
9. manifest
hardware/interfaces/test/aidl/default/android.hardware.test-service.xml
manifest version1.0 typedevicehal formataidlnameandroid.hardware.test/nameversion1/version interface nameITest/name instancedefault/instance /interface /hal
/manifest
10. 编译脚本
hardware/interfaces/test/aidl/default/Android.bp
cc_binary {name: android.hardware.test-service,vendor: true,relative_install_path: hw,init_rc: [android.hardware.test-service.rc],vintf_fragments: [android.hardware.test-service.xml],srcs: [Test.cpp,main.cpp,],shared_libs: [liblog, libbase,libbinder_ndk, android.hardware.test-V1-ndk_platform, ],
}
10. 参与编译 device\xxx\xxx\project.mk
PRODUCT_PACKAGES \android.hardware.test \android.hardware.test-service
11. 模块添加到兼容性矩阵中
hardware/interfaces/compatibility_matrices/compatibility_matrix.x.xml
hardware/interfaces/compatibility_matrices/compatibility_matrix.current.xml
hal formataidl optionaltruenameandroid.hardware.test/nameversion1/versioninterfacenameITest/nameinstancedefault/instance/interface
/hal
12. 解决selinux的问题
参考Android12 AIDL native层实现_android native aidl-CSDN博客
13. 编译烧录
14. 测试
开机后先看看服务是否起来 adb shell service list | grep test
C 测试在这里忽略参考Android12 AIDL native层实现_android native aidl-CSDN博客
15. java 测试
取出 out\soong\.intermediates\hardware\interfaces\test\aidl\android.hardware.test-V1-java\android_common\javac下的jar包放到android工程里边。
由于android.os.ServiceManager是个隐藏类我们用反射
public static IBinder getService(String name) {try {Class? c Class.forName(android.os.ServiceManager);Method getService c.getMethod(getService, String.class);return (IBinder) getService.invoke(c, name);} catch (Exception e) {e.printStackTrace();return null;}
}
java 测试代码
IBinder binder getService(android.hardware.test.ITest/default);
ITest test ITest.Stub.asInterface(binder);
Log.d(TestHal, binder: test);
try {test.setMsg(test message);String msg test.getMsg();Log.d(TestHal, HAL message: msg);
} catch (Exception e) {e.printStackTrace();
} 为什么 getService 是 android.hardware.test.ITest/default 这个可以用 service list | grep test 获取。
这是在 aidl 服务实现时候 add service 时候传入的
const std::string desc std::string() Test::descriptor /default; 另外 selinux 的解决可以参考
SELinux 权限问题调试_audit(0.0:343): avc: denied { create }-CSDN博客 在apk导入framework.jar的方式调用 ServiceManager
在 libs 同级目录下创建 libsconly 把 framework.jar 放入build.gradle 添加
compileOnly fileTree(dir: libsconly, include: [*.jar])
sync 之后就可以使用 android.os.ServiceManager 的静态方法了。
参考RK3568 Android11 增加HAL层的AIDL_android hal aidl-CSDN博客 感谢参考文献的各位算是在 Android 12 上跑通了。
