Question

我有两个物体，我用dagger2注射没有任何问题。当我添加第三个（与之前的两个相同的方式）时，项目不会重建并给出错误，指向前两个（这里没有任何关于添加第三个）：

error: com.google.firebase.database.DatabaseReference cannot be provided without an @Inject constructor or from an @Provides- or @Produces-annotated method.
com.google.firebase.database.DatabaseReference is injected at
com.hotmail.at.jablonskimichal.dni.wolne.od.handlu.ui.splash.SplashPresenter.freeDaysCloudReference
com.hotmail.at.jablonskimichal.dni.wolne.od.handlu.ui.splash.SplashPresenter is injected at
com.hotmail.at.jablonskimichal.dni.wolne.od.handlu.providers.components.MainPresenterComponent.inject(destination)

每三个模块和组件都以相同的方式实现。当然，当我删除添加的第三个项目时，项目很容易编译。

模糊项目构建的模块：

@Module
public class MainPresenterModule {

    private final MainPresenter presenter;

    public MainPresenterModule(MainPresenter presenter) {
        this.presenter = presenter;
    }

    @Singleton
    @Provides
    MainPresenter provideMainPresenter() {
        return presenter;
    }

}

组件：

@Singleton
@Component(modules = {MainPresenterModule.class})
public interface MainPresenterComponent {
    void inject(SplashPresenter destination);
}

也许有用：我正在使用那些带有dagger2的DI库：

    implementation 'com.google.dagger:dagger-android:2.11'
    implementation 'com.google.dagger:dagger-android-support:2.11'
    annotationProcessor 'com.google.dagger:dagger-android-processor:2.11'
    annotationProcessor 'com.google.dagger:dagger-compiler:2.11'

在mac osx上使用最新的android studio（3.1.1）和gradle（3.1.1）。当然我已经尝试过无效缓存和重启，清理等等。我检查了导入，所有这些都是一样的。

修改当我删除注射用量

    @Inject
    DatabaseReference shopsCloudReference;

    public MainPresenter(MainController controller) {
        super(controller);
        Core.injectShopsComponent().into(this);
    }

和

    @Inject
    DatabaseReference freeDaysCloudReference;

    public SplashPresenter(SplashController controller) {
        super(controller);
        Core.injectFreeDaysComponent().into(this);
    }

项目编译，但这不是我想要的。

修改有很多答案我没有在gradle中添加firebase库。我全力以赴：

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.hotmail.at.jablonskimichal.dni.wolne.od.handlu"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

allprojects {
    repositories {
        mavenCentral()
        google()
        maven { url "https://jitpack.io" }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    //tests
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'

    //support
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'

    //images loading
    implementation 'com.github.bumptech.glide:glide:4.4.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.4.0'

    //network
    implementation 'com.squareup.okhttp3:okhttp:3.9.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.9.0'
    implementation 'com.squareup.retrofit2:retrofit:2.2.0'

    //json parsing
    implementation 'com.squareup.retrofit2:converter-gson:2.2.0'
    implementation 'com.google.code.gson:gson:2.8.0'

    //for view bindings
    implementation 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

    //rxjava
    def rxVersion = '2.0.2'
    implementation "io.reactivex.rxjava2:rxandroid:$rxVersion"
    implementation "io.reactivex.rxjava2:rxjava:$rxVersion"
    implementation 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'

    //dagger
    implementation 'com.google.dagger:dagger-android:2.11'
    implementation 'com.google.dagger:dagger-android-support:2.11'
    annotationProcessor 'com.google.dagger:dagger-android-processor:2.11'
    annotationProcessor 'com.google.dagger:dagger-compiler:2.11'

    //google
    implementation 'com.google.android.gms:play-services-maps:15.0.0'
    implementation 'com.google.firebase:firebase-database:15.0.0'
    implementation 'com.google.firebase:firebase-core:15.0.0'

    //datetime
    implementation group: 'joda-time', name: 'joda-time', version: '2.9.9'

    //transitions
    implementation "com.andkulikov:transitionseverywhere:1.7.9"

    //kotlin
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

apply plugin: 'com.google.gms.google-services'

Answer 1

嗯，你写道：

@Component(modules = {MainPresenterComponent.class})

应该是：

@Component(modules = {MainPresenterModule.class})

Dagger构建错误

1 个答案: