未能解析构建中添加的库。Gradle依赖

I have only one Build.gradle file. My problem is that, when I'm trying to add new library for example gson inside dependency it fails

我只有一个版本。gradle文件。我的问题是，当我尝试在依赖项中添加新的库时，例如gson，它会失败

Failed to resolve: com.google.code.gson:gson:2.7

未能解决:com.google.code.gson:gson:2.7

This is my Build.gradle file

这是我的建立。gradle文件

apply plugin: 'com.android.application'

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.3'
    }
}

android {
    compileSdkVersion 19
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.example"
        minSdkVersion 14
        targetSdkVersion 19
        versionCode 1
        versionName "1"
    }
    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
            jniLibs.srcDir 'libs'
        }

        instrumentTest.setRoot('tests')

        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
    buildTypes {
    }
}

dependencies {
    compile fileTree(include: '*.jar', dir: 'libs')
    compile 'com.google.code.gson:gson:2.7'
    //    compile 'com.squareup.retrofit2:retrofit:2.1.0'
}

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

2 个解决方案

#1

You didn't declare any repository (for the actual project). You just declared repositories for build-script dependencies. Those are dependencies the build-script itself needs to run like custom tasks, plugins etc.

您没有声明任何存储库(对于实际的项目)。您刚刚声明了构建脚本依赖项的存储库。这些是构建脚本本身需要运行的依赖项，如自定义任务、插件等。

Add a repositories block outside the buildscript block and define where to search for project dependencies in there.

在buildscript块之外添加一个存储库块，并定义在其中搜索项目依赖项的位置。

#2

You can try with adding the jar files into the lib and adding it to the Gradle.

您可以尝试将jar文件添加到库中，并将其添加到渐变中。

dependencies {
compile files('libs/gson-x.x.x.jar')
}

you can download the jar from this link

您可以从这个链接下载jar

#1