在尝试从我们的项目中使用Dagger v2.11的新
Android匕首类时,我遇到了错误.我不确定问题是什么,因为我在
https://google.github.io/dagger//android.html考虑了Android文档并且仍然无法解决这个问题.有关此设置有什么问题的任何想法？
我的应用程序：
public class MyApplication extends Application implements HasActivityInjector
{
@Inject
AndroidInjector<Activity> androidInjector;
@Override
public void onCreate()
{
super.onCreate();
AppInjector.init(this);
}
@Override
public AndroidInjector<Activity> activityInjector()
{
return androidInjector;
}
}
AppComponent：
@Singleton
@Component(modules = {
AndroidSupportInjectionModule.class,AppModule.class,ActivityModule.class,})
public interface AppComponent
{
@Component.Builder
interface Builder
{
@BindsInstance
Builder application(Application application);
AppComponent build();
}
void inject(MyApplication myApplication);
}
ActivityModule：
@Module
abstract class ActivityModule
{
@ContributesAndroidInjector(modules = FragmentModule.class)
abstract MainActivity contributeMainActivity();
// all other activities defined as above
}
FragmentModule：
@Module
abstract class FragmentModule
{
@ContributesAndroidInjector
abstract MyFragment contributeMyFragment();
}
AppInjector：
public static void init(MyApplication myApplication)
{
DaggerAppComponent.builder().application(myApplication)
.build().inject(myApplication);
myApplication
.registerActivityLifecycleCallbacks(new Application.ActivityLifecycleCallbacks()
{
@Override
public void onActivityCreated(Activity activity,Bundle savedInstanceState)
{
handleActivity(activity);
}
@Override
public void onActivityStarted(Activity activity)
{
}
@Override
public void onActivityResumed(Activity activity)
{
}
@Override
public void onActivityPaused(Activity activity)
{
}
@Override
public void onActivityStopped(Activity activity)
{
}
@Override
public void onActivitySaveInstanceState(Activity activity,Bundle outState)
{
}
@Override
public void onActivityDestroyed(Activity activity)
{
}
});
}
private static void handleActivity(Activity activity)
{
if (activity instanceof HasSupportFragmentInjector)
{
AndroidInjection.inject(activity);
}
if (activity instanceof FragmentActivity)
{
((FragmentActivity) activity).getSupportFragmentManager()
.registerFragmentLifecycleCallbacks(
new FragmentManager.FragmentLifecycleCallbacks()
{
@Override
public void onFragmentCreated(FragmentManager fm,Fragment f,Bundle savedInstanceState)
{
if (f instanceof Injectable)
{
AndroidSupportInjection.inject(f);
}
}
},true);
}
}
的AppModule：
@Module(includes = viewmodelModule.class) class AppModule { @Singleton @Provides UserDao provideUserDao(MyDatabase db) { return db.userDao(); } // all other DAOs }
viewmodelModule：
@Module abstract class viewmodelModule { @Binds @IntoMap @viewmodelKey(Userviewmodel.class) abstract viewmodel bindUserviewmodel(Userviewmodel userviewmodel); }
主要活动：
public class MainActivity extends AppCompatActivity implements HasSupportFragmentInjector
{
@Inject
AndroidInjector<Fragment> androidInjector;
@Override
public AndroidInjector<Fragment> supportFragmentInjector()
{
return androidInjector;
}
}
堆栈跟踪：
Error:(29,10) error: dagger.android.AndroidInjector<android.app.Activity> cannot be provided without an @Provides- or @Produces-annotated method. dagger.android.AndroidInjector<android.app.Activity> is injected at com.myapp.MyApplication.androidInjector com.myapp.MyApplication is injected at com.myapp.dagger.AppComponent.inject(myApplication)
解决方法
尝试将AndroidInjector替换为androidInjector变量的DispatchingAndroidInjector.
这对我有用.这是我的(kotlin)
这对我有用.这是我的(kotlin)
class PodcastApp : Application(),HasActivityInjector {
@Inject
lateinit var dispatchingAndroidInjector : DispatchingAndroidInjector<Activity>
companion object {
lateinit var instance: PodcastApp
}
override fun onCreate() {
super.onCreate()
instance = this
FirebaseApp.initializeApp(this)
if (BuildConfig.DEBUG) {
Timber.plant(Timber.DebugTree())
Stetho.initializeWithDefaults(this)
AppInjector.init(this)
}
}
override fun activityInjector(): AndroidInjector<Activity> {
return dispatchingAndroidInjector
}
}
