源码位置：vim -R frameworks/base/services/core/java/com/android/server/SystemService.java

核心方法

• publishBinderService (缓存服务)

  225     /**
  226      * Publish the service so it is accessible to other services and apps.
  227      *
  228      * @param name the name of the new service
  229      * @param service the service object
  230      * @param allowIsolated set to true to allow isolated sandboxed processes
  231      * to access this service
  232      * @param dumpPriority supported dump priority levels as a bitmask
  233      */
  234     protected final void publishBinderService(String name, IBinder service,
  235             boolean allowIsolated, int dumpPriority) {
  236         ServiceManager.addService(name, service, allowIsolated, dumpPriority);
  237     }