关于Android多渠道打包问题看这一篇就够了

android {  
  compileSdkVersion 29  
  buildToolsVersion "29.0.3"  
  
  defaultConfig {  
      applicationId "com.test.moduledemo"  
      minSdkVersion 21  
      targetSdkVersion 29  
      versionCode 1  
      versionName "1.0"  
  }  
  
  flavorDimensions "versionCode"  
  
  productFlavors {  
      xiaomi{  
          applicationId  = “com.test.xiaomi"  
          //不同渠道配置不同参数  
          buildConfigField "int", "TEST_VALUE", "1"  
          buildConfigField "String", "TEST_NAME", "\"xiaomi\""  
      }  
      huawei{  
          applicationId = "com.test.huawei"  
          //不同渠道配置不同参数  
          buildConfigField "int", "TEST_VALUE", "2"  
          buildConfigField "String", "TEST_NAME", "\"huawei\""  
      }     
      productFlavors.all {//遍历productFlavors多渠道，设置渠道号（xiaomi 、huawei）  
          flavor -> flavor.manifestPlaceholders.put("CHANNEL", name)  
      }
  }
  applicationVariants.all { variant ->  
      // 打包完成后输出路径
      def name = ((project.name != "app") ? project.name : rootProject.name.replace(" ", "")) + 
      "_" + variant.flavorName + 
      "_" + variant.buildType.name + 
      "_" + variant.versionName + 
      "_" + new Date().format('yyyyMMddhhmm') + ".apk"  
      //相对路径app/build/outputs/apk/huawei/release/
      def path = "../../../../../apk/" //相当于路径 app/apk/
      variant.outputs.each { output ->
          def outputFile = output.outputFile
          if (outputFile != null && outputFile.name.endsWith('.apk')) {
               //指定路径输出
               output.outputFileName = new File(path, name)
          }
      } 
      // 在打包完成后还可以做一些别的操作，可以复制到指定目录，或者移动文件到指定目录
      variant.assemble.doLast {  
          File out = new File(“${project.rootDir}/apk”)  
          variant.outputs.forEach { file ->  
            //复制apk到指定文件夹
            //copy {  
            //  from file.outputFile  
            //  into out  
            //}
         //把文件移动到指定文件夹  
          ant.move file: file.outputFile,  
                 todir: "${project.rootDir}/apk"
        }  
      } 
  }
//多渠道签名的配置
  signingConfigs {
     test {
        storeFile file("../test.keystore")
        storePassword 'test'
        keyAlias 'test'
        keyPassword 'test'
        v1SigningEnabled true
        v2SigningEnabled true
     }
     xiaomi {
        storeFile file("../xiaomi.keystore")
        storePassword 'xiaomi'
        keyAlias 'xiaomi'
        keyPassword 'xiaomi'
        v1SigningEnabled true
        v2SigningEnabled true
     }
     huawei {
        storeFile file("../huawei.keystore")
        storePassword 'huawei'
        keyAlias 'huawei'
        keyPassword 'huawei'
        v1SigningEnabled true
        v2SigningEnabled true
     }
  }
  buildTypes {
       debug {
//        debug这里设置不起作用，可能是编译器的问题？
//         productFlavors.xiaomi.signingConfig signingConfigs.test
//         productFlavors.huawei.signingConfig signingConfigs.test
       }
       release {
           productFlavors.xiaomi.signingConfig signingConfigs.xiaomi
           productFlavors.huawei.signingConfig signingConfigs.huawei
       }
  }
//不同渠道不同资源文件配置
  sourceSets{
      xiaomi.res.srcDirs 'src/main/res-xiaomi'
      huawei.res.srcDirs 'src/main/res-huawei'
  }
//不同渠道不同的依赖文件
  dependencies {
      xiaomiApi('xxxxxxx')
      huaweiImplementation('xxxxxxxx')
  }    
}

android {  
 flavorDimensions "versionCode"  
 
 productFlavors {  
     xiaomi{ 
     applicationId = "com.test.xiaomi"   
         //不同渠道配置不同参数  
         buildConfigField "int", "TEST_VALUE", "1"  
         buildConfigField "String", "TEST_NAME", "\"xiaomi\""  
     }  
     huawei{  
      applicationId = "com.test.huawei"  
         //不同渠道配置不同参数  
         buildConfigField "int", "TEST_VALUE", "2"  
         buildConfigField "String", "TEST_NAME", "\"huawei\""  
     } 
     productFlavors.all {//遍历productFlavors多渠道，设置渠道号（xiaomi 、huawei）  
         flavor -> flavor.manifestPlaceholders.put("CHANNEL", name)  
     } 
 }
// ............ 更多配置
}

apply from: rootProject.file('flavors.gradle')

<application>
    <meta-data  
      android:name="TEST_VALUE"  
      android:value="${TEST_VALUE}" />
</application> 

ApplicationInfo applicationInfo = getPackageManager().getApplicationInfo(getPackageName(),  
  PackageManager.GET_META_DATA);
  int testValue = applicationInfo.metaData.getInt("TEST_VALUE");