Android Dagger2 @Module includes属性用法

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@Module
public class TeacherModule {
    @Provides
    public Teacher provideTeacher() {
        return new Teacher();
    }
}

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MainModule通过includes包含TeacherModule

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@Module(includes = TeacherModule.class)
public class MainModule {
    @Provides
    public Person providePerson() {
        return new Student();
    }
}

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这样MainActiviyComponent最后其实是引用了MainModule和TeacherModele两个Module

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@Component(modules = MainModule.class)
public interface MainActivityComponent {
    void inject(MainActivity activity);
}

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以上其实和以下写法效果是一样的

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@Component(modules = {
        MainModule.class,
        TeacherModule.class
})
public interface MainActivityComponent {
    void inject(MainActivity activity);
}

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当然Module的includes可以多层依赖的，比如TeacherModule还可以在includes其他Module，而且includes支持包含多个

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@Module(includes = {
        FatherModule.class,
        MotherModule.class
})
public class TeacherModule {
    @Provides
    public Teacher provideTeacher() {
        return new Teacher();
    }
}

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