Dav*_*nUk 8 android coroutine kotlin android-room
我是 Kotlin 和 Android Studio 的新手,我目前的问题是......
我正在尝试让 Codelabs“android-room-with-a-view-kotlin”工作,同时修复各种构建错误,我认为我的 build.gradle 变得非常混乱!我通过添加依赖项更正了Word.kt 上的最后一次构建失败
kapt 'androidx.room:room-ktx:2.2.1'
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下一个构建在WordDao.kt上更进一步,但由于相同类型的错误而失败。
WordDao.java:21: error: To use Coroutine features, you must add `ktx` artifact from Room as a dependency. androidx.room:room-ktx:<version>
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我无法继续,因为我不知道要在 build.gradle 中更改什么,因为我已经添加了该依赖项?
正如我已经说过我的文件现在很迷茫,我将不胜感激任何以使其更明智的援助。谢谢, DaveInUk
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: "kotlin-kapt"
android {
compileSdkVersion 28
buildToolsVersion "29.0.2"
defaultConfig {
applicationId "com.example.prepopplus"
//was minSdkVersion 15 Note Old phone is API16
minSdkVersion 21
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
packagingOptions {
exclude "META-INF/atomicfu.kotlin_module"
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.50"
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
kapt 'androidx.room:room-ktx:2.2.1'
kapt "androidx.room:room-compiler:2.2.1"
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0-rc01'
implementation 'androidx.recyclerview:recyclerview:1.0.0'
implementation 'com.google.android.material:material:1.0.0'
implementation 'com.android.support:appcompat-v7:28.0.0'
kapt "android.arch.persistence.room:compiler:1.1.1"
kapt "android.arch.lifecycle:compiler:1.1.1"
implementation 'androidx.room:room-runtime:2.2.1'
}
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ian*_*ake 42
你正在使用
kapt 'androidx.room:room-ktx:2.2.1'
kapt "androidx.room:room-compiler:2.2.1"
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但androidx.room:room-ktx不是 的输入kapt,而是正常的implementation依赖项(room-compiler注解处理器)。因此,您的依赖项需要是
implementation 'androidx.room:room-ktx:2.2.1'
kapt "androidx.room:room-compiler:2.2.1"
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根据声明室依赖项文档。请注意,room-ktx在拉room-runtime的传递依赖,这样你就可以删除依赖和仅仅依靠room-ktx如果你想。
小智 15
这些是您应该添加的。
implementation "androidx.room:room-runtime:$room_version"
kapt "androidx.room:room-compiler:$room_version"
// Kotlin Extensions and Coroutines support for Room
implementation "androidx.room:room-ktx:$room_version"
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