博客

1.创建config.gradle文件
ext {

    android = [
            compileSdkVersion : 30,
            buildToolsVersion : "30.0.1",
            applicationId     :"com.example.demo",
            minSdkVersion     : 20,
            targetSdkVersion  : 30,
            versionCode       : 1,
            versionName       : "1.0.1",
    ]

    app = [
            appName : "外壳",
            appOutPath : "D:\\app",
            storeFile    : "src/bywl.jks",
            storePassword: "bywl123456",
            keyAlias     : "bywl",
            keyPassword  : "bywl123456",
            BASE_URL : "http://www.baidu.com"
    ]

    libs = [

    ]

}

2、使用在工程下build.gradle 下添加
apply from: "config.gradle"

3、app下build.gradle使用rootProject.ext.app["BASE_URL"]

4、若项目java代码中使用，则需要在app下build.gradle Android中添加
  manifestPlaceholders = [
                BASE_URL : rootProject.ext.app["BASE_URL"]
        ]

5、清单文件中添加
 <application>
  <meta-data
            android:name="BASE_URL"
            android:value="${BASE_URL}"
            />
 </application>
 
 6、代码获取
    ApplicationInfo applicationInfo = getPackageManager().getApplicationInfo(getPackageName(), PackageManager.GET_META_DATA);
            String base_url = applicationInfo.metaData.getString("BASE_URL");
            
//7 配置成静态变量
  android{
      defaultConfig{
      //配置静态成员 BuildConfig.BASE_URL
          buildConfigField 'String', 'BASE_URL',  "\"${rootProject.ext.android["BASE_URL"]}\""
        //配置 color  R.color.main_color
        resValue "color", "main_color", rootProject.ext.android["mainColor"]
        //配置string R.string.app_name
        resValue "string", "app_name", rootProject.ext.android["appName"]
      }
  }