前言

在做的一個Kotlin項目用到的數(shù)據(jù)庫框架是greenDAO，在將項目升級到AGP 8.0版本后，編譯時由于greenDAO版本不兼容導致編譯不過，經(jīng)過一番摸索，最終解決了greenDAO在AGP 8.0+版本下的編譯報錯問題，特此記錄一下??

環(huán)境

升級greenDAO插件版本到3.3.1

修改項目根目錄下的build.gradle文件，內(nèi)容如下：

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:8.0.2'
        classpath 'org.greenrobot:greendao-gradle-plugin:3.3.1'
    }
}

升級greenDAO依賴版本到3.3.0

修改項目模塊如app模塊下的build.gradle文件，內(nèi)容如下：

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'kotlin-android-extensions'
    id 'kotlin-kapt'
    id 'org.greenrobot.greendao'
}

greendao {
    schemaVersion 19
    daoPackage 'xxx'
    targetGenDir 'src/main/java'
}

dependencies {
    implementation 'org.greenrobot:greendao:3.3.0'
}

然后編譯，還是編譯不過，報錯內(nèi)容如下：

org.gradle.internal.execution.WorkValidationException: Some problems were found with the configuration of task ':app:greendao' (type 'DefaultTask').
  - Gradle detected a problem with the following location: '/Users/kongpf/Desktop/mail-android/app/src/main/java'.
    
    Reason: Task ':app:compileOfficialDebugKotlin' uses this output of task ':app:greendao' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.
    
    Possible solutions:
      1. Declare task ':app:greendao' as an input of ':app:compileOfficialDebugKotlin'.
      2. Declare an explicit dependency on ':app:greendao' from ':app:compileOfficialDebugKotlin' using Task#dependsOn.
      3. Declare an explicit dependency on ':app:greendao' from ':app:compileOfficialDebugKotlin' using Task#mustRunAfter.
    
    Please refer to https://docs.gradle.org/8.0.2/userguide/validation_problems.html#implicit_dependency for more details about this problem.

翻譯一下，報錯的意思就是任務':app:compileOfficialDebugKotlin'使用任務':app:greendao'的輸出，但沒有聲明顯式或隱式依賴，并貼心的給出了幾種解決辦法和相關的gradle鏈接.

修改一下build.gradle腳本，添加依賴關系，編譯kotlin的任務依賴greendao任務，如下：

tasks.whenTaskAdded { task ->
    if (task.name.matches("compile\w*Kotlin")) {
        task.dependsOn('greendao')
    }
}

然后再重新編譯就可以編譯通過?了，最終的build.gradle腳本如下：

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'kotlin-android-extensions'
    id 'kotlin-kapt'
    id 'org.greenrobot.greendao'
}

greendao {
    schemaVersion 19
    daoPackage 'xxx'
    targetGenDir 'src/main/java'
}

//添加依賴關系
tasks.whenTaskAdded { task ->
    if (task.name.matches("compile\w*Kotlin")) {
        task.dependsOn('greendao')
    }
}

dependencies {
    implementation 'org.greenrobot:greendao:3.3.0'
}

參考資源

• https://github.com/greenrobot/greenDAO

• # The project encountered errors after updating Gradle Version 7.6.1 to Gradle Version 8.0+

• https://docs.gradle.org/8.0.2/userguide/validation_problems.html#implicit_dependency