android - Gradle 设置 : Invalid variable name. 必须以字母开头，但是:

Question

在设置我的 android 项目时出现问题:

startup failed:
settings file '/home/user/StudioProjects/project/android/settings.gradle': 1: Invalid variable name. Must start with a letter but was: rootProject
. At [1:1]  @ line 1, column 1.
   rootProject.name = 'project'
   ^

1 error

Open File

但问题是我在“rootProject”变量名之前没有任何符号。
有什么想法吗？

Answer 1

如果您尝试在根目录中设置一些全局变量 gradle文件然后在您的模块中重用它们的build.gradle ，我如何让它工作的是:

在根目录 build.gradle :

buildscript {
    ... blah blah 
}

// put HERE all your variables, they will automatically
// be available as rootProject.xxx in the rest of build.gradles
ext {
    name = "project"
    compileSdkVersion = 27
    targetSdkVersion = 27
    supportLibraryVersion = "27.0.2"
    buildToolsVersion = "26.0.1"
    googleServicesVersion = "11.8.0"
}

allprojects {
    ... blah blah
}
.
.

然后在你的APP(或模块)build.gradle ，您可以使用它们:

apply plugin: 'com.android.application'

android {

    compileSdkVersion rootProject.compileSdkVersion
    buildToolsVersion rootProject.buildToolsVersion

    defaultConfig {
        applicationId "xxxx"
        targetSdkVersion rootProject.targetSdkVersion
        .
        .   
    }