Question

我检查了所有问题，但没有发现任何线索。我把问题解决了最简单的代码：

情况：我希望：

@Component(modules = {KameModule.class, CatAnalyzerModule.class})
public interface CatComponent {

    CatAnalyzer getCatAnalyzer();
}

我创建了组件：

@Module
public class KameModule {

    private Context context;

    public KameModule(Context context) {
        this.context = context;
    }

    @Provides
    KameCat provideKameCat() {
        return new KameCat(context );
    }
}

@Module(includes = KameModule.class)
public class CatAnalyzerModule {

    @Inject
    KameCat cat;

    @Provides
    CatAnalyzer provideCatAnalyzer() {
        return new CatAnalyzer(cat);
    }
}

和模块：

public class KameCat {

    Context context;

    public KameCat(Context context) {
        this.context = context;
    }

    public void doCatStuff() {
        Toast.makeText(context, "Poo and Meow", Toast.LENGTH_LONG).show();
    }
}

public class CatAnalyzer {

    @Inject
    KameCat cat;

    @Inject
    public CatAnalyzer(KameCat cat) {
        this.cat = cat;
    }

    void analyze() {
        cat.doCatStuff();
    }
}

课程：

cat

当我从CatComponent检索我的CatAnalyzer对象时，它有defaultTasks = ['test']字段为空。我不知道为什么Dagger不会注射它。你能以某种方式指导我吗？

Answer 1

正确的代码：

@Module(includes = KameModule.class)
public class CatAnalyzerModule {

    @Inject //remove this
    KameCat cat;// remove this

    @Provides
    // Add cat as a argument and let KameModule provide it..
    CatAnalyzer provideCatAnalyzer(KameCat cat) {
        return new CatAnalyzer(cat);
    }
}

感谢： https://www.future-processing.pl/blog/dependency-injection-with-dagger-2/

Dagger 2不注入相关模块

1 个答案: