首先检查一下您的Gradle配置文件是否正确。请确保以下变量在Gradle.properties文件中正确配置：

android.useAndroidX=true
android.enableJetifier=true

然后，请检查您的build.gradle（Project）文件中的maven {url 'https://dl.bintray.com/appodeal/SDK' }配置是否正确。示例配置如下：

allprojects {
    repositories {
        mavenLocal()
        google()
        jcenter()
        maven {url 'https://dl.bintray.com/appodeal/SDK' }
    }
}

如果仍然无法构建，尝试清除Gradle缓存并重新构建：

cd android
./gradlew clean
./gradlew build

如果仍然失败，请检查您的artifactory权限是否正确配置。在文件app/build.gradle中，确保artifactory信息正确并且您有足够的权限进行访问。

def artifactoryUser = ""
def artifactoryPassword = ""
def artifactoryUrl = ""
def artifactoryRepo = ""
def artifactoryGroup = ""

repositories {
    maven {
        url "$artifactoryUrl/libs-release"
        credentials {
            username artifactoryUser
            password artifactoryPassword
        }
    }

    maven {
        url "$artifactoryUrl/libs-snapshot"
        credentials {
            username artifactoryUser
            password artifactoryPassword
        }
    }
}

dependencies {
    compile group: "$artifactoryGroup", name: "appodeal-sdk", version: "2.8.10"
}

如果这些步骤仍未解决您的问题，请确保您的Appending location，在您的root/build.gradle文件中，正确配置：

ext {
    buildToolsVersion = "29.0.0"
    minSdkVersion = 16
    compileSdkVersion = 28
    targetSdkVersion = 28
    supportLibVersion = "28.0.0"
    multidexEnabled = true
    versionCode = 51
    versionName = "2.7.1"
    googlePlayServicesVersion = "11.4.2"
}

如果所有这些步骤仍然无法解决问题，您可以尝试升级到