android tutorial - Shrink the code with ProGuard - android studio - android app developement

To enable code shrinking with ProGuard, add minifyEnabled true to the appropriate build type in your build.gradle file.

android {
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile(‘proguard-android.txt'),
                    'proguard-rules.pro'
        }
    }
}

where: minifyEnabled true : enable code shrinking The getDefaultProguardFile(‘proguard-android.txt') method gets the default ProGuard settings from the Android SDK The proguard-rules.pro file is where you can add custom ProGuard rules