重复类com.google.android.exoplayer2.ui.DownloadNotificationHelper

Question

在我尝试运行flutter应用程序时出现以下错误：

警告：映射新的nshttp://schemas.android.com/repository/android/common/02给老奶奶http://schemas.android.com/repository/android/common/01警告：映射新的nshttp://schemas.android.com/repository/android/generic/02给老奶奶http://schemas.android.com/repository/android/generic/01警告：映射新的nshttp://schemas.android.com/sdk/android/repo/addon2/02给老奶奶http://schemas.android.com/sdk/android/repo/addon2/01警告：映射新的nshttp://schemas.android.com/sdk/android/repo/repository2/02给老奶奶http://schemas.android.com/sdk/android/repo/repository2/01警告：映射新的nshttp://schemas.android.com/sdk/android/repo/sys-img2/02给老奶奶http://schemas.android.com/sdk/android/repo/sys-img2/01

失败：生成失败，出现异常。

• 错误：任务“：app:checkDebugDuplicateClasses”的执行失败

执行com时发生故障。Android建筑格雷德尔。内部的任务。选中DuplicatesRunnable Duplicate class com.google.Androidexoplayer2。用户界面。下载模块jetified-exoplayer-core-2.17.0-runtime（com.google.android.exoplayer:exoplayer-core:2.17.0）和jetified-exoplayer-ui-2.15.0-runtime（com.google.android.exoplayer:exoplayer-ui:2.15.0）中的NotificationHelper

请参阅文档，了解如何修复依赖项解析错误。

• 尝试：使用--stacktrace选项运行以获取堆栈跟踪。使用--info或--debug选项运行以获得更多日志输出。运行--扫描以获得完整的洞察力

• 获得更多帮助https://help.gradle.org

1m 47s异常中生成失败：Gradle任务assembleDebug失败，退出代码为1

如何修复此错误。？以下是我的build.gradle文件：

app\build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion flutter.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.college_club"
        minSdkVersion 21
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}


apply plugin: 'com.google.gms.google-services'

android\build。格雷德尔：

buildscript {
    ext.kotlin_version = '1.6.10'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Answer 1

我遇到了同样的问题，尝试清理所有缓存并再次获取依赖项：

• flatter clean
• flatter pub cache clean
• flatter pub get

Answer 2

通过在/android/app/build中添加以下行来修复它。格雷德尔

dependencies {
    ....
    implementation ('com.google.android.exoplayer:exoplayer:2.17.0')
}