在Gradle构建期间，序言中不允许包含内容 [英] Content is not allowed in prolog during Gradle build

问题描述

我尝试了不同的方法，但问题仍未解决，我什至重新安装了android studio，但仍然遇到相同的问题:

I tried Different methods but the problem did not solved, I even reinstalled android studio but still getting same issue:

[Fatal Error] annotations-26.1.1.pom:2:1: Content is not allowed in prolog.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'myapp'.
> Could not resolve all files for configuration ':classpath'.
   > Could not resolve com.android.tools:annotations:26.1.1.
     Required by:
         project : > com.android.tools.build:gradle:3.1.1 > com.android.tools.build:gradle-core:3.1.1 > com.android.databinding:compilerCommon:3.1.1
      > Could not resolve com.android.tools:annotations:26.1.1.
         > Could not parse POM https://dl.google.com/dl/android/maven2/com/android/tools/annotations/26.1.1/annotations-26.1.1.pom
            > Content is not allowed in prolog.
   > Could not resolve com.android.tools:annotations:26.1.1.
     Required by:
         project : > com.android.tools.build:gradle:3.1.1 > com.android.tools.build:gradle-core:3.1.1 > com.android.tools.build:builder:3.1.1 > com.android.tools.build:builder-model:3.1.1
         project : > com.android.tools.build:gradle:3.1.1 > com.android.tools.build:gradle-core:3.1.1 > com.android.tools.build:builder:3.1.1 > com.android.tools:common:26.1.1
         project : > com.android.tools.build:gradle:3.1.1 > com.android.tools.build:gradle-core:3.1.1 > com.android.tools.build:builder:3.1.1 > com.android.tools.analytics-library:shared:26.1.1
         project : > com.android.tools.build:gradle:3.1.1 > com.android.tools.build:gradle-core:3.1.1 > com.android.tools.build:builder:3.1.1 > com.android.tools.analytics-library:tracker:26.1.1
         project : > com.android.tools.build:gradle:3.1.1 > com.android.tools.build:gradle-core:3.1.1 > com.android.tools.build:builder:3.1.1 > com.android.tools:sdklib:26.1.1 > com.android.tools.layoutlib:layoutlib-api:26.1.1
      > Could not resolve com.android.tools:annotations:26.1.1.
         > Could not parse POM https://dl.google.com/dl/android/maven2/com/android/tools/annotations/26.1.1/annotations-26.1.1.pom
            > Content is not allowed in prolog.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

CONFIGURE FAILED in 34s

序言中不允许内容.

app \ build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.kakarot.myapp"
        minSdkVersion 24
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:27.0.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

---

项目(build.gradle)

//顶层构建文件，您可以在其中添加所有子项目/模块共有的配置选项.

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.1'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

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

我添加了应用模块build.gradle和项目build.gradle.

I added the app module build.gradle and project build.gradle.

推荐答案

经过大量的努力和在线搜索，我终于解决了这个问题.

After a lot of struggle and searching online, i finally solve the problem.

当我构建新项目时，我删除了gradle中所有缓存的文件夹.它像魔术一样工作.感谢 @ישואוהבאותך的回复并尝试帮助我.

I deleted all the cached folders in gradle and when i build my new project. It work like magic. Thanks @ישו אוהב אותך for reply and trying to help me.

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