[英]Unable to import Room database for use in Android app
我正在通過 android 工作室開發 Android 應用程序,並且我正在嘗試實現 Room 數據庫。 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無法正確導入。嘗試import androidx.room.*;
返回cannot resolve symbol 'room'
。 我無法找到解決此問題的方法。
我努力了:
https://maven.google.com
作為存儲庫api
代替implementation
項目 Gradle 文件:
allprojects {
repositories {
jcenter()
google()
}
}
應用程序 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"
}
編輯:我也試過這個沒有成功,以及使用 room_version 作為 1.0.0
def room_version = "2.2.6"
implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"
編輯:在 gradle 同步時,我發現它在Download room-runtime-2.2.6.pom...
卡住了 10-15 分鍾,完成后顯示警告:
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
單擊顯示詳細信息並沒有將其定向到任何地方
您需要使用androidx
依賴項。 您已經在使用androidx
工件,因此您必須對Room
使用相同的工件。 在文檔中也提到了它。
def room_version = "2.2.6"
implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"
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