是因为本人在调试过程中被权限这块绕了一点时间. 然后接着分析上面提到的vhal模块与Service之间的通信,之前的文章也讲过vhal使用了hidl接口,最终会编译出一个jar包,具体查阅此篇Android 9.0 AutotoMotive模块之Vehicle, 生成的 android.hardware.automotive.vehicle-V2.0-java.jar被service编译的时候依赖了,其中自动生成...
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CarServiceHelperService 执行 onStart() 的时候,会将后续的工作交给CarServiceHelperServiceUpdatableImpl来处理。 其onStart() 里调用bindService()绑定 action 为"android.car.ICar"、package 为"com.android.car"的 Service,即构成章节里提到的CarService组件。 public class CarServiceHelperService extends SystemServi...
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CarService是一个拥有最高优先级的应用服务,它的的源码在 packages/services/Car 目录下面,这个目录下存在许多的工程,这里我们只关心service这个文件夹,service下包含了CarService的服务实现。 权限定义与检查 CarService针对一些特殊的属性读写,定义了对属性值的访问权限,定义方式在service目录中的AndroidManifest.xml中,...
CarService进入启动时序后,onCreate()方法中进行一系列的自身的初始化操作,步骤如下: 1)通过HIDL接口获取到HAL层的IHwBinder对象-IVehicle,与AIDL的用法类似,必须持有IHwBinder对象我们才可以与Vehicle HAL层进行通信。 2)创建ICarImpl对象,并调用init方法,它就是ICar.aidl接口的实现类,我们需要通过它才能拿到其他的...
Step 1. Check your vehicle. Check your vehicle whether the vehicle or stereo is compatible with Android Auto. Make sure that Android Auto is switched on in your vehicle's settings. Consult your vehicle's manual or contact the manufacturer if you need further assistance with it....
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