Android 安卓可以'；不要加一个单数

我试图给我的项目添加一个信号，我添加了这样的依赖项

buildscript {
    repositories {
        maven { url 'https://plugins.gradle.org/m2/' }
    }
    dependencies {
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:0.8.1'
    }
    }
    apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'

    repositories {
      maven { url 'https://maven.google.com' }

}

还有我的身材，格雷德尔

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
        classpath 'com.google.gms:google-services:3.2.1'
        classpath 'io.fabric.tools:gradle:1.24.4'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url 'http://jhoobin.abroid.com/repo/' }
        maven { url "https://jitpack.io" }
        maven { url "https://maven.google.com" }
        google()
    }

}

但是当我同步渐变时，我总是出错

错误：无法解析“”的依赖项：app@debug/compileClasspath'：找不到任何与com.google.android.gms匹配的版本：play services:15.+。 打开文件
显示详细信息

我的代码怎么了？

这些是我的渐变。 这是我的应用程序：gradle

//noinspection GradleCompatible
apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.app.app"
        manifestPlaceholders = [onesignal_app_id: "APP_ID_HERE",
                                // Project number pulled from dashboard, local value is ignored.
                                onesignal_google_project_number: "PROJECT_NUMBER_HERE"]
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile files('libs/commons-io-2.4.jar')
    compile 'com.google.firebase:firebase-core:10.2.0'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:design:23.4.0'
    compile 'com.onesignal:OneSignal:3.+@aar'
    // Required for OneSignal, even if you have added FCM.
    compile 'com.google.android.gms:play-services-gcm:10.2.0'
    testCompile 'junit:junit:4.12'
}

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

我的主要项目是格拉德尔

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

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.3'
        classpath 'com.google.gms:google-services:3.0.0'

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

allprojects {
    repositories {
        jcenter()
    }
}

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

---

从顶部文件中删除依赖项。并从中间将其添加到依赖项中。您在此处显示哪些文件？每个项目都有两个名为

build.gradle

的文件。一个在项目的根目录中，另一个在

app

目录中。您的gradles@Code-学徒第一个是app.gradle第二个是project.gradle