Android Studio and protobuf Error:(7, 0) Plugin with id 'com.google.protobuf' not found -

i want use grpc in android studio, failed in gradle setting.

my gradle plugin version 2.1.2. have installed gradle 2.14.

in app\build.gradle file:

    apply plugin: 'com.android.application'  android {     compilesdkversion 23     buildtoolsversion "23.0.3"      apply plugin: "com.google.protobuf"      defaultconfig {         applicationid "com.example.test.test_20"         minsdkversion 15         targetsdkversion 23         versioncode 1         versionname "1.0"      }      buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }         debug {             debuggable true             jnidebuggable true         }     }      buildscript {         repositories {             maven {                 mavencentral()             }         }         dependencies {             classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.0"         }     }       protobuf {         protoc {             // version of protoc must match protobuf-java. if don't depend on             // protobuf-java directly, transitively depending on             // protobuf-java version grpc depends on.             artifact = "com.google.protobuf:protoc:3.0.0"         }         plugins {             grpc {                 artifact = 'io.grpc:protoc-gen-grpc-java:1.0.0'             }         }         generateprototasks {             all()*.plugins {                 grpc {}             }         }     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     compile 'com.android.support:appcompat-v7:23.1.1'     compile 'com.android.support:design:23.1.1'     compile 'io.grpc:grpc-okhttp:1.0.0'     compile 'io.grpc:grpc-protobuf-lite:1.0.0'     compile 'io.grpc:grpc-stub:1.0.0' } 

gradle sync message output error:(7, 0) plugin id 'com.google.protobuf' not found.

what wrong in setting?

i create new empty project, , app/build.gradle file:

apply plugin: 'com.android.application' apply plugin: "com.google.protobuf"  buildscript {     repositories {         maven {             //mavencentral()             url 'https://repo1.maven.org/maven2'         }     }     dependencies {         classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.0"     } }  android {     compilesdkversion 23     buildtoolsversion "23.0.3"      defaultconfig {         applicationid "com.example.test.testprotobuf"         minsdkversion 15         targetsdkversion 23         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     testcompile 'junit:junit:4.12'     compile 'com.android.support:appcompat-v7:23.4.0'     compile 'com.android.support:design:23.4.0' } 

and gradle-wrapper.properties file:

distributionbase=gradle_user_home distributionpath=wrapper/dists zipstorebase=gradle_user_home zipstorepath=wrapper/dists distributionurl=https\://services.gradle.org/distributions/gradle-2.12-all.zip 

i excute "gradlew build" command successfully. , sync gradle, prompt “error:(2, 0) cause: org/gradle/api/internal/file/collections/defaultdirectoryfiletreefactory ” 。

something wrong in build.gradle. have move parts:

   apply plugin: 'com.android.application'    apply plugin: "com.google.protobuf"     buildscript {         repositories {             maven {                 mavencentral()             }         }         dependencies {             classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.0"         }     }     android {     }