无法解析'：app @ debug / compileClasspath'的依赖项：无法解析com.android.support:multidex:1.0.2

Question

我最近更新了android studio，但是build.gradle文件中有问题。我该如何解决这个问题？将调试{}和暂存{}添加到gradle（4.8）并使用matchingFallbacks无效。谢谢。问候。

 Unable to resolve dependency for ':app@debug/compileClasspath': Could not 
 resolve com.android.support:multidex:1.0.2.
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 Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': 
 Could not resolve com.android.support:multidex-instrumentation:1.0.2.
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 Show Details

 Unable to resolve dependency for ':app@release/compileClasspath': Could not 
 resolve com.android.support:multidex:1.0.2.
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等级：

 apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion '28.0.1'
defaultConfig {
    applicationId "com.xx.yyyy"
    minSdkVersion 14
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    multiDexEnabled true
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }

}
productFlavors {
}
dexOptions{
    //incremental true
    javaMaxHeapSize "12g"
}

}

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:25.3.1'
implementation project(':multidex-1.0.2')
implementation project(':multidex-instrumentation-1.0.2')
}