android - Gradle DSL method not found: 'runProguard'

Question

I get an error after updating from my last project. Not a problem in my code but I'm having trouble with build.gradle. How can I fix it?

build.gradle code here:

apply plugin: 'android'

android {
    compileSdkVersion 21
    buildToolsVersion '20.0.0'

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/ASL2.0'
    }

    defaultConfig {
        applicationId 'com.xxx.axxx'
        minSdkVersion 14
        targetSdkVersion 19
        versionCode 6
        versionName '1.0'
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    productFlavors {
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:19.+'
    compile files('libs/commons-codec-1.8.jar')
    compile files('libs/asmack-android-8-4.0.4.jar')
    compile 'com.android.support:support-v4:21.0.0'
    compile 'com.google.code.gson:gson:2.2.4'
    compile 'com.jakewharton:butterknife:5.1.1'
}

Gradle Sync message output:

Error:(27, 0) Gradle DSL method not found: 'runProguard()'
**Possible causes:
The project 'Atomic4Mobile' may be using a version of Gradle that does not contain the method.
**Gradle settings**
The build file may be missing a Gradle plugin.
**Apply Gradle plugin**

Answer 1

If you are using version 0.14.0 or higher of the gradle plugin, you should replace "runProguard" with "minifyEnabled" in your build.gradle files.

runProguard was renamed to minifyEnabled in version 0.14.0. For more info, See Android Build System