在模块注释@ module ( subcomponent = ...)中声明子组件的示例

Question

在dagger module annotation中声明subcomponent的用例是什么？例如：

@Module(subcomponents = ChildComponent.class)
public class ModuleB 

我已经阅读了文档，但找不到任何用法示例。

Any {@link Subcomponent}- or {@code @ProductionSubcomponent}-annotated classes which should be
   * children of the component in which this module is installed. A subcomponent may be listed in
   * more than one module in a component.

Answer 1

您可以指定应该依赖于您的模块所属的组件的子组件类。

我有带有模块ModuleA和组件B的组件A。如果在ModuleA中指定subcomponents = B.class，则dagger将不会编译给

error: A doesn't have a @Subcomponent.Builder, which is required when used with @Module.subcomponents
@Module(subcomponents = {B.class})
^

除非组件B是A的子组件。