引导用户，尝试在这里了解Dagger的一些好处。假设我有以下内容MyActivity.java---------------publicclassMyActivity{@InjectMyImplicitClassmyImplicitClass;@Inject@Named("foo")MyExplicitClassmyNamedExplicitClass;...}MyImplicitClass.java------------publicclassMyImplicitClass{@InjectMyImplicitClass(MyExplicitClassmyExplicitClass){