How to use the ProGuard in Android Studio?

Question

This is my first project in Android Studio, and the code of my apps are not obfuscated. Im using this configuration in build.gradle file:

Answer 1

Try renaming your 'proguard-rules.txt' file to 'proguard-android.txt' and remove the reference to 'proguard-rules.txt' in your gradle file. The getDefaultProguardFile(...) call references a different default proguard file, one provided by Google and not that in your project. So remove this as well, so that here the gradle file reads:

buildTypes {
    release {
        runProguard true
        proguardFile 'proguard-android.txt'
    }
}