我正在尝试将MainActivity注入片段。我有一个在我的MainActivity中实现的接口,它将侦听来自Fragment的事件。所以我想注入MainActivity并在其上调用事件监听器。如何使用Dagger2将活动注入片段
我曾尝试做以下事情,但未能如愿。只显示代码片段。
接口
public interface RecipeItemListener {
void onRecipeItem();
}
MainActivity实现接口
public class MainActivity extends AppCompatActivity implements RecipeItemListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(savedInstanceState == null) {
getSupportFragmentManager()
.beginTransaction()
.add(R.id.main_fragment_container, RecipeListView.newInstance(), RecipeListView.TAG)
.commit();
}
}
@Override
public void onRecipeItem() {
Timber.d("onRecipeItem");
}
}
我的模块,它提供在MainActivity
@Module
public class RecipeListModule {
private MainActivity mainActivity;
public RecipeListModule(MainActivity mainActivity) {
this.mainActivity = mainActivity;
}
@RecipeListScope
@Provides
public RecipeItemListener providesRecipeListMainActivity() {
return mainActivity;
}
}
我主要成分
@Singleton
@Component(modules = {
AndroidModule.class,
NetworkModule.class})
public interface BusbyBakingComponent {
RecipeListComponent add(RecipeListModule recipeListModule);
}
我的子
@RecipeListScope
@Subcomponent(modules = {RecipeListModule.class})
public interface RecipeListComponent {
void inject(RecipeListView target);
}
我的应用程序类
public class BusbyBakingApplication extends Application {
private BusbyBakingComponent applicationComponent;
private RecipeListComponent recipeListComponent;
@Override
public void onCreate() {
super.onCreate();
applicationComponent = createApplicationComponent();
}
public BusbyBakingComponent createApplicationComponent() {
return DaggerBusbyBakingComponent.builder()
.networkModule(new NetworkModule())
.androidModule(new AndroidModule(BusbyBakingApplication.this))
.build();
}
public BusbyBakingComponent getApplicationComponent() {
return applicationComponent;
}
public RecipeListComponent createRecipeListComponent(MainActivity activity) {
recipeListComponent = applicationComponent.add(new RecipeListModule(activity));
return recipeListComponent;
}
public void releaseRecipeListComponent() {
recipeListComponent = null;
}
}
,在我的片段,这是如何,我试图注入:
@Inject MainActivity mainActivity;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
((BusbyBakingApplication)getActivity().getApplication())
.createRecipeListComponent((MainActivity)getActivity())
.inject(RecipeListView.this);
}
我不断收到以下错误:
Error:(14, 8) error: [me.androidbox.busbybaking.di.RecipeListComponent.inject(me.androidbox.busbybaking.recipieslist.RecipeListView)] me.androidbox.busbybaking.recipieslist.MainActivity cannot be provided without an @Inject constructor or from an @Provides- or @Produces-annotated method.
me.androidbox.busbybaking.recipieslist.MainActivity is injected at
me.androidbox.busbybaking.recipieslist.RecipeListView.mainActivity
me.androidbox.busbybaking.recipieslist.RecipeListView is injected at
me.androidbox.busbybaking.di.RecipeListComponent.inject(target)
非常感谢您的任何建议。
难道你不使用'getActivity()'获得片段中的活动吗?修复工作的 – EpicPandaForce