How update plugins in android studio?

Question

I ran my android project after almost a week and I got this message:

Plugin is too old, please update to a more recent version, or set ANDROID_DAILY_OVERRIDE environment variable to "a8faa180fc282060c9b8ec88f9bdcc9072121284"

How do I update my Plugins? I am using android Studio 2.0. Here is my build.gradle project file

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
repositories {
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:2.0.0-alpha1'

    // 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
}

Answer 1

Change com.android.tools.build:gradle:2.0.0-alpha1 to com.android.tools.build:gradle:2.0.0-alpha3 which is the latest version.

Answer 2

Open your IDE. Open a project. Then look for the following:

If you are using Windows you go to Help -> Check for updates

If you are using Mac, you go to Android Studio (next to the Mac symbol, in the top left) -> Check for updates

Alternatively when you launch your SDK Manger, it automatically searches for updates to your plugins. Navigate to SDK Tools.

Answer 3

UDPATE (may-2016)

update to lastest

dependencies {
    classpath 'com.android.tools.build:gradle:2.1.0'
  }

You can specify the Gradle version in either the File > Project Structure > Project menu in Android Studio, or by editing the Gradle distribution reference in the gradle/wrapper/gradle-wrapper.properties file

distributionUrl = https\://services.gradle.org/distributions/gradle-2.10-all.zip

check gradle revisions

The Android Gradle Plugin and Gradle
 Android Gradle Plugin    Requires Gradle
 1.0.0 - 1.1.3     2.2.1 - 2.3
 1.2.0 - 1.3.1     2.2.1 - 2.9
 1.5.0     2.2.1+
 2.*   2.10+

check answer for update gradle