xlistview错误

apply plugin: 'com.android.library'

android {
    compileSdkVersion
    buildToolsVersion '26.0.1'

    defaultConfig {
        minSdkVersion
        targetSdkVersion
versionCode
versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:26.+'
}