Question

我在添加以下行后尝试构建我的gradle

implementation "com.android.support:appcompat-v7:${versions.supportLib}"

    implementation "com.android.support:recyclerview-v7:${versions.supportLib}"

    implementation "com.android.support:support-annotations:${versions.supportLib}"

    implementation "com.android.support:design:${versions.supportLib}"

我收到以下错误

Error:(32, 0) Could not get unknown property 'versions' for object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.
<a href="openFile:C:\Users\Sagar\Desktop\SickLab\app\build.gradle">Open File</a>

我的整个成绩档案如下

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.sagar.sicklab"
        minSdkVersion 21
        targetSdkVersion 26
        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-v7:26.1.0'
    implementation 'com.android.support:support-v4:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'

    implementation("com.mikepenz:materialdrawer:6.0.1@aar") {
        transitive = true
    }


    implementation "com.android.support:appcompat-v7:${versions.supportLib}"

    implementation "com.android.support:recyclerview-v7:${versions.supportLib}"

    implementation "com.android.support:support-annotations:${versions.supportLib}"

    implementation "com.android.support:design:${versions.supportLib}"

    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'

    compile 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support:support-v4:26.+'
    compile 'com.android.support:design:26.+'
    compile 'com.google.android.gms:play-services-ads:11.0.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'


    compile 'com.github.apl-devs:appintro:v4.2.2'
    compile 'eu.long1:spacetablayout:1.0.4'


}

Answer 1

问题是你还没有定义一个有针对性的命名＆＃34;版本＆＃34;那个gradle可以访问。错误消息表明它无法找到它。

无法获取未知属性＆＃39;版本＆＃39;对于org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler类型的对象

您需要定义一个名为版本的对象，该对象具有一个名为＆＃34; supportLib＆＃34;的变量。并保存您要使用的支持库的值。

我之前从未这样做过，所以可能完全错了，但是这里有一些伪代码可以帮助你定义你的对象：

version = new Version(supportLib: "26.1.0")

class Version {
    String supportLib

    String toString() {
        supportLib
    }
}

您可以在同一个build.gradle文件中定义它。执行gradle时会发生什么，它将实例化versions对象并从supportLib字段读取版本字符串值并将其附加到支持库String。话虽如此，我从未见过＆＃34;实现＆＃34; com.android.support：recyclerview-v7：$ {versions.supportLib}＆＃34;之前的语法，所以你肯定需要实验。 Here是给我伪代码的网站。

Answer 2

只需添加您的文件：

ext {
    supportLibraryVersion = "25.3.1"
}

并替换：

compile "com.android.support:appcompat-v7:$supportLibraryVersion"
compile "com.android.support:support-v4:$supportLibraryVersion"
compile "com.android.support:cardview-v7:$supportLibraryVersion"
compile "com.android.support:recyclerview-v7:$supportLibraryVersion"
compile "com.android.support:design:$supportLibraryVersion"

我在构建成绩档案时遇到错误

2 个答案: