无法加载类'com.android.build.gradle.managed.BuildType_Impl

我正在尝试使用android studio进行基本的ndk实现。现在我无法同步gradle我认为buid.gradle缺少某些配置

我收到此错误

错误：无法加载类“ com.android.build.gradle.managed.BuildType_Impl”。此意外错误的可能原因包括：

• Gradle的依赖项缓存可能已损坏（这有时会在网络连接超时后发生。）重新下载依赖项并同步项目（需要网络）
• Gradle构建过程（守护程序）的状态可能已损坏。停止所有Gradle守护程序可以解决此问题。停止Gradle构建过程（需要重新启动）
• 您的项目可能使用的第三方插件与该项目中的其他插件或该项目要求的Gradle版本不兼容。

我的buid.gradle（应用程式）

 apply plugin: 'com.android.model.application'
    model
            {
                android {
                    compileSdkVersion = 23
                    buildToolsVersion = "23.0.1"

                    defaultConfig.with {
                        applicationId = "com.example.app"
                        minSdkVersion.apiLevel = 9
                        targetSdkVersion.apiLevel = 23
                        versionCode = 1
                        versionName = "1.0"
                    }

                }
                android.buildTypes {
                    release {
                        minifyEnabled = false
                        proguardFiles += file('proguard-rules.txt')
                    }
                }

                    packagingOptions {
                        exclude 'META-INF/DEPENDENCIES'
                        exclude 'META-INF/NOTICE'
                        exclude 'META-INF/LICENSE'
                        exclude 'META-INF/LICENSE.txt'
                        exclude 'META-INF/NOTICE.txt'

                    }

                android.ndk {
                    moduleName = "jniSample"
                }

                android.productFlavors {
                    // for detailed abiFilter descriptions, refer to "Supported ABIs" @
                    // https://developer.android.com/ndk/guides/abis.html#sa
                    create("arm") {
                        ndk.abiFilters.add("armeabi")
                    }
                    create("arm7") {
                        ndk.abiFilters.add("armeabi-v7a")
                    }
                    create("arm8") {
                        ndk.abiFilters.add("arm64-v8a")
                    }
                    create("x86") {
                        ndk.abiFilters.add("x86")
                    }
                    create("x86-64") {
                        ndk.abiFilters.add("x86_64")
                    }
                    create("mips") {
                        ndk.abiFilters.add("mips")
                    }
                    create("mips-64") {
                        ndk.abiFilters.add("mips64")
                    }
                    // To include all cpu architectures, leaves abiFilters empty
                    create("all")
                }

                dependencies {
                    compile fileTree(dir: 'libs', include: ['*.jar'])
                    testCompile 'junit:junit:4.12'
                    compile 'com.android.support:appcompat-v7:23.0.1'
                    compile 'com.google.android.gms:play-services-ads:8.4.0'

                    compile files('libs/httpclient-4.1.3.jar')
                    compile files('libs/httpcore-4.1.4.jar')
                }

            }

我的build.gradle（项目）

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle-experimental:0.4.0'
        // 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
}

gradle.wrapper.properties

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.8-all.zip