frameworks/base/core/java/android/os下面加aidl文件和frameworks/base/core/java/android/app下面加aidl文件有什么区别,不清楚
interface ICarSignalManager { void setBacklightState(boolean state); }
在frameworks/base/services/java的com.android.server下面
public class CarSignalManagerService extends ICarSignalManager.Stub { ...... }
在SystemServer的ServerThread的run方法中
ServiceManager.addService(Context.CAR_SIGNAL_SERVICE, new CarSignalManagerService(context));
上面的方法涉及到ServiceManager,我们这里根据那个addService来跟踪下:
public static void addService(String name, IBinder service) { try { getIServiceManager().addService(name, service); } catch (RemoteException e) { Log.e(TAG, "error in addService", e); } }
IServiceManager的实现类:ServiceManagerNative和ServiceManagerProxy这两个又有什么区别呢?
服务调用的地方
public CarSignalManager(Context context) { IBinder b = ServiceManager.getService(Context.CAR_SIGNAL_SERVICE); if (b == null) { throw new RuntimeException("Car Signal service not available!"); } mService = ICarSignalManager.Stub.asInterface(b); }
CarSignalManager carSignalManager = (CarSignalManager) mContext .getSystemService(Context.CAR_SIGNAL_SERVICE); carSignalManager.setBacklightState(false);
ApplicationContext中
@Override public Object getSystemService(String name) { ... if (CAR_SIGNAL_SERVICE.equals(name)) { return getCarSignalManager(); } ... }