[英]Unable to import Room database for use in Android app
我正在通过 android 工作室开发 Android 应用程序,并且我正在尝试实现 Room 数据库。 I was using https://developer.android.com/training/data-storage/room for instructions as well as https://medium.com/mindorks/using-room-database-android-jetpack-675a89a0e942 , however I was无法正确导入。尝试import androidx.room.*;
返回cannot resolve symbol 'room'
。 我无法找到解决此问题的方法。
我努力了:
https://maven.google.com
作为存储库api
代替implementation
项目 Gradle 文件:
allprojects {
repositories {
jcenter()
google()
}
}
应用程序 Gradle 文件:
dependencies {
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'com.google.android.material:material:1.2.1'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
def room_version = "2.2.6"
implementation "android.arch.persistence.room:runtime:$room_version"
annotationProcessor "android.arch.persistence.room:compiler:$room_version"
}
编辑:我也试过这个没有成功,以及使用 room_version 作为 1.0.0
def room_version = "2.2.6"
implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"
编辑:在 gradle 同步时,我发现它在Download room-runtime-2.2.6.pom...
卡住了 10-15 分钟,完成后显示警告:
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve androidx.room:room-runtime:2.2.6.
Show Details
Affected Modules: app
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve androidx.room:room-runtime:2.2.6.
Show Details
Affected Modules: app
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve androidx.room:room-runtime:2.2.6.
Show Details
Affected Modules: app
单击显示详细信息并没有将其定向到任何地方
您需要使用androidx
依赖项。 您已经在使用androidx
工件,因此您必须对Room
使用相同的工件。 在文档中也提到了它。
def room_version = "2.2.6"
implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"
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