android.sourceSets.main.java.srcDirs Cannot get property ‘main‘ on null object

当使用React Native 集成 react-native-reanimated插件时报错

A problem occurred configuring project ':react-native-reanimated'.
> Cannot get property 'main' on null object

这个错误引起的原因是应为在

bulid.gradle(Project) 中使用了这一段代码

注意下面 android 是关键字 跟 react-native-reanimated 某些东西冲突了。所以需要修改android 为非关键字。。。

ext {
    android = [
            minSdkVersion    : 21,
            targetSdkVersion : 29,
            compileSdkVersion: 29,
    ]

    appcompat_version = '1.2.0'
    material_version = '1.2.0'
    multidex_version = '2.0.1'
    constraintlayout_version = '1.1.3'
    lifecycle_verison = '2.2.0'
    dagger_version = '2.28.3'
    room_version = '2.2.5'

}