所有build.gradle文件都有：
implementation "com.google.dagger:hilt-android:2.28.3-alpha"
kapt "com.google.dagger:hilt-android-compiler:2.28.3-alpha"
implementation "androidx.hilt:hilt-lifecycle-viewmodel:1.0.0-alpha02"
kapt "androidx.hilt:hilt-compiler:1.0.0-alpha02"
kapt "com.google.dagger:hilt-android-compiler:2.28.3-alpha"
implementation "javax.inject:javax.inject:1"
Root 的 build.gradle：
classpath "com.google.dagger:hilt-android-gradle-plugin:2.28.3-alpha"
应用程序的 build.gradle：
android {
...
defaultConfig {
...
javaCompileOptions.annotationProcessorOptions.arguments +=
["room.schemaLocation": "$projectDir/schemas".toString()]
}
我的应用程序：
@HiltAndroidApp
class MyApplication : MultiDexApplication() {
override fun onCreate() {
super.onCreate()
Timber.plant(Timber.DebugTree())
}
}
api模块：
@InstallIn(SingletonComponent::class) //@InstallIn(ApplicationComponent::class)
@Module
class ApiModule {
@Provides
fun products(retrofit: Retrofit): ProductsApi =
retrofit.create(ProductsApi::class.java)
}
ProductsListViewModel:
class ProductsListViewModel @ViewModelInject constructor(
private val getProductsListUseCase: GetProductsListUseCase
) : BaseViewModel() {
基础视图模型：
open class BaseViewModel @ViewModelInject constructor() : ViewModel() {
产品列表片段：
import androidx.fragment.app.viewModels
//@AndroidEntryPoint
class ProductsListFragment : Fragment(R.layout.fragment_product_list) {
private val productsListViewModel: ProductsListViewModel by viewModels()
...
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
productsListViewModel.getProductsList() //Line 57
产品API：
interface ProductsApi {
@GET("products")
fun getProducts(
@Query("page") page: Int = 1,
@Query("per_page") perPage: Int = 15
): Call<List<ProductResponse>>
}
应用模块：
@InstallIn(SingletonComponent::class) //@InstallIn(ApplicationComponent::class)
@Module
class AppModule {
@Provides
@Singleton
fun resources(application: Application): Resources = application.resources
@Provides
@Singleton
fun gson(): Gson = GsonBuilder().create()
@Provides
@Singleton
fun okHttpClient(baseHttpClient: BaseHttpClient): OkHttpClient = baseHttpClient.okHttpClient
@Provides
@Singleton
fun retrofit(baseRetrofit: BaseRetrofit): Retrofit = baseRetrofit.retrofit
}
存储库模块：
@InstallIn(SingletonComponent::class) //@InstallIn(ApplicationComponent::class)
@Module
class RepositoryModule {
@Suppress("PrivatePropertyName")
private val NETWORK_IO = Executors.newFixedThreadPool(5)
@Provides
fun products(productsRemoteDataSource: ProductsRemoteDataSource): ProductsRepository =
ProductsRepositoryImpl(productsRemoteDataSource, NETWORK_IO)
}
ProductsRepositoryImpl:
@Singleton
class ProductsRepositoryImpl @Inject constructor(
private val productsRemoteDataSource: ProductsRemoteDataSource,
private val networkExecutor: Executor
) : ProductsRepository {
ProductsRemoteDataSource:
@Singleton
class ProductsRemoteDataSource @Inject constructor(
private val productsApi: ProductsApi
) : BaseRemoteDataSource() {
主要活动：
//@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
错误：
2020-08-04 18:17:10.575 2047-2047/? E/LoadedApk: Unable to instantiate appComponentFactory
java.lang.ClassNotFoundException: Didn't find class "androidx.core.app.CoreComponentFactory" on path: DexPathList[[],nativeLibraryDirectories=[/system/priv-app/GoogleSdkSetup/lib/x86, /system/lib, /system/product/lib, /system/lib, /system/product/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.app.LoadedApk.createAppFactory(LoadedApk.java:256)
at android.app.LoadedApk.updateApplicationInfo(LoadedApk.java:370)
at android.app.ActivityThread.handleDispatchPackageBroadcast(ActivityThread.java:5951)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1941)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at com.android.server.SystemServer.run(SystemServer.java:541)
at com.android.server.SystemServer.main(SystemServer.java:349)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:908)
2020-08-04 18:17:10.582 2047-2047/? E/LoadedApk: Unable to instantiate appComponentFactory
java.lang.ClassNotFoundException: Didn't find class "androidx.core.app.CoreComponentFactory" on path: DexPathList[[],nativeLibraryDirectories=[/system/priv-app/GoogleSdkSetup/lib/x86, /system/lib, /system/product/lib, /system/lib, /system/product/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.app.LoadedApk.createAppFactory(LoadedApk.java:256)
at android.app.LoadedApk.updateApplicationInfo(LoadedApk.java:370)
at android.app.ActivityThread.handleDispatchPackageBroadcast(ActivityThread.java:5951)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1941)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at com.android.server.SystemServer.run(SystemServer.java:541)
at com.android.server.SystemServer.main(SystemServer.java:349)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:908)
2020-08-04 18:17:10.987 1799-2440/? E/GnssHAL_GnssInterface: gnssSvStatusCb: a: input svInfo.flags is 8
2020-08-04 18:17:10.987 1799-2440/? E/GnssHAL_GnssInterface: gnssSvStatusCb: b: input svInfo.flags is 8
2020-08-04 18:17:11.442 1817-2087/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2020-08-04 18:17:11.442 1817-2087/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2020-08-04 18:17:11.795 28568-28568/debug E/AndroidRuntime: FATAL EXCEPTION: main
Process: debug, PID: 28568
java.lang.RuntimeException: Cannot create an instance of class ProductsListViewModel
at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.java:221)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.java:278)
at androidx.lifecycle.SavedStateViewModelFactory.create(SavedStateViewModelFactory.java:106)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:185)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.java:150)
at androidx.lifecycle.ViewModelLazy.getValue(ViewModelProvider.kt:54)
at androidx.lifecycle.ViewModelLazy.getValue(ViewModelProvider.kt:41)
at ProductsListFragment.getProductsListViewModel(Unknown Source:2)
at ProductsListFragment.setupViewModel(ProductsListFragment.kt:57)
at ProductsListFragment.onViewCreated(ProductsListFragment.kt:37)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:332)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1199)
at androidx.fragment.app.FragmentManager.addAddedFragments(FragmentManager.java:2236)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2009)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1965)
at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1861)
at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2641)
at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2589)
at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2723)
at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:346)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1200)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1368)
at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1446)
at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1509)
at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2637)
at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2589)
at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:247)
at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:541)
at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:201)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1425)
at android.app.Activity.performStart(Activity.java:7825)
at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3294)
at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
2020-08-04 18:17:11.795 28568-28568/debug E/AndroidRuntime: Caused by: java.lang.InstantiationException: java.lang.Class<ProductsListViewModel> has no zero argument constructor
at java.lang.Class.newInstance(Native Method)
at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.java:219)
... 42 more
2020-08-04 18:17:11.990 1799-2440/? E/GnssHAL_GnssInterface: gnssSvStatusCb: a: input svInfo.flags is 8