我有dagger/导弹绑定的问题。我已经在stackoverflow上找到了所有相关的答案，我试图使用kotlin、gradle、dagger的不同版本，我尝试使用kapt { correctErrorTypes = true }和kapt { generateStubs = true }等不同的解决方案，但问题仍然存在。
错误看起来像：
E:AndroidStudioPrjctswindygoappsrcmainjavaappwindygodaggerAppComponent.java:12: error: [Dagger/MissingBinding] java.util.Map<java.lang.Class<? extends androidx.lifecycle.ViewModel>,javax.inject.Provider<androidx.lifecycle.ViewModel>> cannot be provided without an @Provides-annotated method.
public interface AppComponent {
^
java.util.Map<java.lang.Class<? extends androidx.lifecycle.ViewModel>,javax.inject.Provider<androidx.lifecycle.ViewModel>> is injected at
app.windygo.ui.DefaultViewModelFactory(creators)
app.windygo.ui.DefaultViewModelFactory is injected at
app.windygo.dagger.ViewModelModule.bindDefaultViewModelFactory(factory)
androidx.lifecycle.ViewModelProvider.Factory is injected at
app.windygo.dagger.DaggerWrapper.factory
app.windygo.dagger.DaggerWrapper is injected at
app.windygo.dagger.AppComponent.inject(app.windygo.dagger.DaggerWrapper)
我的消息来源：
AppComponent.java
package app.windygo.dagger;
import android.content.Context;
import javax.inject.Singleton;
import dagger.BindsInstance;
import dagger.Component;
@Singleton
@Component(modules = { AppModule.class, ViewModelModule.class })
public interface AppComponent {
@Component.Builder
interface Builder {
@BindsInstance Builder context(Context context);
AppComponent build();
}
void inject(DaggerWrapper wrapper);
}
AppModule.java
package app.windygo.dagger;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import javax.inject.Singleton;
import app.windygo.BuildConfig;
import app.windygo.api.LiveDataCallAdapterFactory;
import app.windygo.api.WindyGoSource;
import dagger.Module;
import dagger.Provides;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
@Module
public class AppModule {
@Singleton
@Provides
HttpLoggingInterceptor getInterceptor() {
return new HttpLoggingInterceptor(/*new ApiLogger()*/);
}
@Singleton
@Provides
HttpLoggingInterceptor.Level getLogLevel() {
return BuildConfig.DEBUG ? HttpLoggingInterceptor.Level.BODY : HttpLoggingInterceptor.Level.NONE;
}
@Singleton
@Provides
WindyGoSource provideGoodwineService() {
OkHttpClient.Builder builder = new OkHttpClient.Builder();
builder.addInterceptor(chain -> {
Request original = chain.request();
String token = original.header(WindyGoSource.HEADER_AUTHORIZATION);
if (token != null) {
Request.Builder requestBuilder = original.newBuilder()
.header("Authorization", "Bearer " + token);
original = requestBuilder.build();
}
return chain.proceed(original);
});
builder.addNetworkInterceptor(getInterceptor().setLevel(getLogLevel()));
OkHttpClient client = builder.build();
Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ").create();
return new Retrofit.Builder()
.baseUrl(BuildConfig.API_URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.addCallAdapterFactory(new LiveDataCallAdapterFactory())
.client(client)
.build()
.create(WindyGoSource.class);
}
}
dagger包装器.java
package app.windygo.dagger;
import androidx.lifecycle.ViewModelProvider;
import javax.inject.Inject;
public class DaggerWrapper {
@Inject
ViewModelProvider.Factory factory;
public ViewModelProvider.Factory getViewModelFactory() {
return factory;
}
}
ViewModelKey.java
package app.windygo.dagger;
import androidx.lifecycle.ViewModel;
import dagger.MapKey;
@MapKey
@interface ViewModelKey {
Class<? extends ViewModel> value();
}
ViewModelModule.java
package app.windygo.dagger;
import androidx.lifecycle.ViewModelProvider;
import app.windygo.ui.DefaultViewModelFactory;
import dagger.Binds;
import dagger.Module;
@Module
public abstract class ViewModelModule {
@Binds
public abstract ViewModelProvider.Factory bindDefaultViewModelFactory(DefaultViewModelFactory factory);
}
DefaultViewModelFactory.java
package app.windygo.ui;
import androidx.lifecycle.ViewModel;
import androidx.lifecycle.ViewModelProvider;
import androidx.annotation.NonNull;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
@Singleton
public class DefaultViewModelFactory implements ViewModelProvider.Factory {
private final Map<Class<? extends ViewModel>, Provider<ViewModel>> creators;
@Inject
public DefaultViewModelFactory(Map<Class<? extends ViewModel>, Provider<ViewModel>> creators) {
this.creators = creators;
}
@NonNull
@Override
public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
Provider<? extends ViewModel> creator = creators.get(modelClass);
if (creator == null) {
throw new IllegalArgumentException("unknown model class " + modelClass);
}
try {
return (T) creator.get();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
由于在配置dagger 2时kapt和kotlin存在不同的问题，我将java用于dagger相关类。但我甚至试图用Kotlin重写这些类，但它并没有解决我的问题。
最后，我的build.gradle文件：
build.gradle(项目(
buildscript {
ext.kotlin_version = '1.3.61'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.5.3'
classpath 'com.google.gms:google-services:4.3.3'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
}
}
allprojects {
repositories {
google()
jcenter()
maven { url 'https://jitpack.io' }
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
build.gradle(应用程序(
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
def versionMajor = 1
def versionMinor = 0 // 0..9
def versionPatch = 0 // 0..9
def versionBuild = 0 // 0..99
static def getGitRevParseInfo(what) {
def cmd = "git rev-parse " + what + " HEAD"
def proc = cmd.execute()
proc.text.trim()
}
android {
compileSdkVersion 29
defaultConfig {
multiDexEnabled true
applicationId "app.windygo"
minSdkVersion 23
targetSdkVersion 29
versionCode versionMajor * 10000 + versionMinor * 1000 + versionPatch * 100 + versionBuild
versionName "${versionMajor}.${versionMinor}.${versionPatch}.${versionBuild}"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
debug {
debuggable true
}
}
compileOptions {
sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.13'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
// Dagger 2
kapt "com.google.dagger:dagger-compiler:2.26"
implementation "com.google.dagger:dagger:2.26"
//Retrofit
implementation 'com.squareup.retrofit2:retrofit:2.7.1'
implementation 'com.squareup.retrofit2:converter-gson:2.7.1'
implementation 'com.squareup.okhttp3:logging-interceptor:4.4.0'
// ViewModel and LiveData
implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
implementation 'androidx.lifecycle:lifecycle-common-java8:2.2.0'
}
那么，请告诉我如何修复它的任何想法？
如果不将至少一个ViewModel与ViewModelKey绑定，dagger不会创建提供Map<Class<? extends ViewModel>, Provider<ViewModel>>的函数