Plugin with id com.android.application not found

https://blog.csdn.net/ch1406285246/article/details/52785052

buildscript {
    repositories {
        jcenter()
    }
 
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.0'
    }
}

//需要添加上面的代码
apply plugin: 'com.android.application'
 
android {
    compileSdkVersion 19
    buildToolsVersion "21.0.0"
    android {compileOptions.encoding = "UTF-8"}
    defaultConfig {
        applicationId "com.cheng.contact"
        minSdkVersion 15
        targetSdkVersion 19
        versionCode 2
        versionName "1.1"
    }