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

Here is Some of Most Common Proguard Rules that you need to add in proguard-rules.pro file in Android Sutdio.

ButterKnife

 -keep class butterknife.** { *; }
 -dontwarn butterknife.internal.**
 -keep class **$$ViewBinder { *; }
 -keepclasseswithmembernames class * {
        @butterknife.* ;
  }
 -keepclasseswithmembernames class * {
        @butterknife.* ;
  }

Retrofit

 -dontwarn retrofit.**
 -keep class retrofit.** { *; }
 -keepattributes Signature
 -keepattributes Exceptions

OkHttp3

 -keepattributes Signature
 -keepattributes *Annotation*
 -keep class okhttp3.** { *; }
 -keep interface okhttp3.** { *; }
 -dontwarn okhttp3.** 
 -keep class sun.misc.Unsafe { *; }
 -dontwarn java.nio.file.*
 -dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement 

Gson

 -keep class sun.misc.Unsafe { *; }
 -keep class com.google.gson.stream.** { *; }

Code obfuscation

-keepclassmembers class com.yourname.models** { ; }