【发布时间】：2019-10-29 13:14:13
【问题描述】：
我正在处理一个使用房间持久性库版本 1.1.1 的项目，它在所有高于 android 4.4 的设备上运行良好（例如：棒棒糖、棉花糖等）。但是每当我尝试安装该应用程序时，它都会在 android 4.4 版上崩溃。我已附上崩溃日志和其他相关文件。
错误日志：
java.lang.RuntimeException: Unable to instantiate application com.example.dmr.MyApp:
java.lang.RuntimeException: cannot find implementation for
com.example.dmr.data.local_db.RoomDB. RoomDB_Impl does not exist
at android.app.LoadedApk.makeApplication(LoadedApk.java:516)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4317)
at android.app.ActivityThread.access$1500(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: cannot find implementation for
com.example.dmr.data.local_db.RoomDB. RoomDB_Impl does not exist
at androidx.room.Room.getGeneratedImplementation(Room.java:94)
at androidx.room.RoomDatabase$Builder.build(RoomDatabase.java:667)
at com.example.dmr.data.local_db.RoomHelper.<init>(RoomHelper.kt:20)
at com.example.dmr.MyApp.setDataManager(MyApp.kt:34)
at com.example.dmr.MyApp.attachBaseContext(MyApp.kt:19)
at android.app.Application.attach(Application.java:181)
at android.app.Instrumentation.newApplication(Instrumentation.java:991)
at android.app.Instrumentation.newApplication(Instrumentation.java:975)
at android.app.LoadedApk.makeApplication(LoadedApk.java:511)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4317)
at android.app.ActivityThread.access$1500(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method) ode here
分级：
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
apply plugin: 'com.google.gms.google-services'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.dmr"
minSdkVersion 18
targetSdkVersion 28
versionCode 1
versionName "1.0"
dataBinding.enabled = true
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
defaultConfig {
multiDexEnabled true // enable mun
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.core:core-ktx:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.coordinatorlayout:coordinatorlayout:1.0.0'
// Retrofit
implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
implementation "com.squareup.retrofit2:adapter-rxjava2:$retrofit_version"
implementation "com.squareup.retrofit2:converter-moshi:$retrofit_version"
implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
implementation 'com.github.bumptech.glide:glide:4.8.0'
//Okhttp3
implementation "com.squareup.okhttp3:okhttp:$okhttp3_version"
implementation 'com.squareup.okhttp3:logging-interceptor:3.12.1'
implementation 'com.google.code.gson:gson:2.8.5'
// Room
implementation 'android.arch.persistence.room:runtime:1.1.1'
kapt 'android.arch.persistence.room:compiler:1.1.1'
annotationProcessor 'android.arch.persistence.room:compiler:1.1.1'
androidTestImplementation 'android.arch.persistence.room:testing:1.1.1'
// Support Design
implementation "com.android.support:design:$android_support_version"
// RecyclerView
implementation "com.android.support:recyclerview-v7:$android_support_version"
// Constraint Layout
implementation "com.android.support.constraint:constraint-layout:1.1.3"
// LiveData & ViewModel
implementation "android.arch.lifecycle:extensions:$lifecycle_version"
// Dagger 2
implementation "com.google.dagger:dagger:$dagger2_version"
compileOnly "org.glassfish:javax.annotation:3.1.1"
//Rx
implementation "io.reactivex.rxjava2:rxjava:2.2.2"
implementation "io.reactivex.rxjava2:rxandroid:2.1.0"
implementation 'com.google.firebase:firebase-core:17.0.1'
implementation 'com.google.firebase:firebase-messaging:19.0.1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
// Google maps
implementation 'com.google.android.gms:play-services-maps:17.0.0'
// Google Maps Android API Utility Library
implementation 'com.google.maps.android:android-maps-utils:0.5'
//circular image view
implementation 'de.hdodenhof:circleimageview:3.0.0'
implementation 'com.google.android.gms:play-services-location:17.0.0'
//Smart Location Library
implementation 'io.nlopez.smartlocation:library:3.3.3'
implementation 'com.github.ybq:Android-SpinKit:1.2.0'
}
数据库：
package com.example.dmr.data.local_db
import androidx.room.Database
import androidx.room.RoomDatabase
import com.example.dmr.data.local_db.dao.*
import com.example.dmr.data.local_db.entity.AreaInfo
import com.example.dmr.data.local_db.entity.LocalAuthorityContactModel
import com.example.dmr.data.local_db.entity.UserInfo
import com.example.dmr.data.local_db.entity.Volunteer
import com.example.dmr.model.DRM_models.DisasterActivityModel
import com.example.dmr.model.DRM_models.RescueRequestListModel
import com.example.dmr.model.DRM_models.ShelterData
@Database(entities = arrayOf(UserInfo::class,AreaInfo::class,
DisasterActivityModel:: class,LocalAuthorityContactModel::class,
ShelterData::class,Volunteer::class, RescueRequestListModel::class),
version = 1, exportSchema = false)
abstract class RoomDB : RoomDatabase() {
abstract fun userDao(): UserDao
abstract fun areaListDao(): AreaListDao
abstract fun activityListDao(): DisasterActivityListDao
abstract fun localAuthorityListDao(): LocalAuthorityContactListDao
abstract fun shelterListDao(): ShelterListDao
abstract fun volunteerDao(): VolunteerDao
abstract fun rescueRequestDao(): RescueRequestListDao
}
数据库助手：
package com.example.dmr.data.local_db
import android.content.Context
import androidx.room.Room
import com.example.dmr.data.local_db.entity.AreaInfo
import com.example.dmr.data.local_db.entity.LocalAuthorityContactModel
import com.example.dmr.data.local_db.entity.UserInfo
import com.example.dmr.data.local_db.entity.Volunteer
import com.example.dmr.model.DRM_models.DisasterActivityModel
import com.example.dmr.model.DRM_models.RescueRequestListModel
import com.example.dmr.model.DRM_models.ShelterData
class RoomHelper(context: Context) : IRoomHelper {
private var context = context
private val db = Room.databaseBuilder(context, RoomDB::class.java, "BD_NAME")
.fallbackToDestructiveMigration()
.allowMainThreadQueries().build()
//------------activity list---------//
override fun roomGetRescueRequestList(): List<RescueRequestListModel> {
return db.rescueRequestDao().roomGetRescueRequestList()
}
override fun roomGetRescueRequestListByOperationId(operation_code: String): List<RescueRequestListModel> {
return db.rescueRequestDao().roomGetRescueRequestListByOperationId(operation_code)
}
override fun roomInsertRescueRequestList(rescue_list: List<RescueRequestListModel>){
db.rescueRequestDao().roomInsertRescueRequestList(rescue_list)
}
override fun roomDeleteRescueRequestList(): Int {
return db.rescueRequestDao().roomDeleteRescueRequestList()
}
}
【问题讨论】：
标签： android kotlin android-room android-4.4-kitkat