AS报错“Plugin with id 'com.android.application' not found”

  导入下载的AS项目时经常会遇到“Plugin with id ‘com.android.application’ not found”的报错。出现这个情况是因为项目缺少了一个build.grade。com.android.application来源于com.android.tools.build:gradle:2.3.0(版本可能不同)。而com.android.tools.build:gradle:2.3.0在build.grade（Project**）中定义。

  一般的gradle文件是分为项目和模块两个的。Android的工程结构是以项目为基础，可以添加多个模块。

build.grade(Project**)

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.0'//这里是你的AS版本

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

allprojects {
    repositories {
        jcenter()//maven仓库地址
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

build.grade(Module**)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.0"

    defaultConfig {
        applicationId "locating.indoor.autonavi.com.onlinelocationdemo"
        minSdkVersion 18
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        ndk {
            abiFilter "armeabi"
        }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main {
            jniLibs.srcDirs = ['libs']
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.0'
}

  遇到这种情况把build.grade(Project**)中的代码复制到build.grade(Module**)中然后TryAgain就可了。注意不要忘记更改自己的AS版本。