getSystemService最终是在SystemServiceRegistry.java里做的:
public static Object getSystemService(ContextImpl ctx, String name) {
ServiceFetcher<?> fetcher = SYSTEM_SERVICE_FETCHERS.get(name);
return fetcher != null ? fetcher.getService(ctx) : null;
}
而SYSTEM_SERVICE_FETCHERS是registerService的时候设的:
static <T> void registerService(String serviceName, Class<T> serviceClass,
ServiceFetcher<T> serviceFetcher) {
SYSTEM_SERVICE_NAMES.put(serviceClass, serviceName);
SYSTEM_SERVICE_FETCHERS.put(serviceName, serviceFetcher);
}
registerService是在ContextImplInjector.java里调用的:
static void registerMiuiServices() {
SystemServiceRegistry.registerService(Context.SECURITY_SERVICE, SecurityManager.class,
new CachedServiceFetcher<SecurityManager>() {
@Override
public SecurityManager createService(ContextImpl ctx) {
IBinder b = ServiceManager.getService(Context.SECURITY_SERVICE);
ISecurityManager service = ISecurityManager.Stub.asInterface(b);
return new SecurityManager(service);
}
}
);
SystemServiceRegistry.registerService(Context.LOCATION_POLICY_SERVICE, LocationPolicyManager.class,
new CachedServiceFetcher<LocationPolicyManager>() {
@Override
public LocationPolicyManager createService(ContextImpl ctx) {
return new LocationPolicyManager(ILocationPolicyManager.Stub.asInterface(
ServiceManager.getService(Context.LOCATION_POLICY_SERVICE)));
}
}
);
}
over, 后面再加binder相关
