无法解决：com.android.volley：volley：1.0.0

Question

当我将以下行添加到依赖项的build.gradle行时，Android Studio显示此错误消息：compile 'com.android.volley:volley:1.0.0'

apply plugin: 'com.android.application'

    android {
        compileSdkVersion rootProject.ext.compileSdkVersion
        buildToolsVersion rootProject.ext.buildToolsVersion

        defaultConfig {
            applicationId "com.parse.starter"
            minSdkVersion rootProject.ext.minSdkVersion
            targetSdkVersion rootProject.ext.targetSdkVersion
            versionCode 1
            versionName "1.0"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }

    dependencies {
        compile 'com.android.support:appcompat-v7:22.2.0'

        compile 'com.parse.bolts:bolts-tasks:1.3.0'
        compile 'com.parse:parse-android:1.13.0'
        compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
        compile 'com.google.code.gson:gson:2.8.0'
        compile 'org.jetbrains:annotations-java5:15.0'
        compile 'com.android.volley:volley:1.0.0'
    }

Answer 1

查看项目gradle中的存储库中是否有jcenter（）。

例如：

authenticateCredentials(usernameString: "user", passwordString: "pass") { (isAuth:Bool) in
    self.isAuth = isAuth
    // go on with whatever you want to do and use self.isAuth successfully
}