未解决的参考：JavaVersion.VERSION_1_8

Question

如何解决以下错误？

android {
    ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    ...
}

Android Studio->文件->项目结构->模块-> 未解决的参考：JavaVersion.VERSION_1_8

Answer 1

我buildscript在根部分添加build.gradle了ext.java_version变量

buildscript {
    ...
    ext.java_version = JavaVersion.VERSION_1_8
    ...
}

并更改build.gradle JavaVersion.VERSION_1_8为java_version

android {
    ...
    compileOptions {
        sourceCompatibility java_version
        targetCompatibility java_version
    }
    ...
}

现在一切正常。