1、SystemServiceManager
/**
* Starts the specified boot phase for all system services that have been started up to
* this point.
*
* @param phase The boot phase to start.
*/
public void startBootPhase(final int phase) {
...
service.onBootPhase(mCurrentPhase);
...
}
https://blog.youkuaiyun.com/kc58236582/article/details/49928627