Android: ProGuard source code
Enable ProGuard in Android gradle build, make sure that the build variant is same. minifyEnabled true Add following snippet to App ' proguard-rules.pro' file -optimizationpasses 5 -dontusemixedcaseclassnames -dontskipnonpubliclibraryclasses -dontskipnonpubliclibraryclassmembers -dontpreverify -dontnote -ignorewarnings -verbose -optimizations !code/simplification/arithmetic,!field/*,!class/merging/* # not to proguard dependent library packages -keep class com.squareup.** -keep class com.android.volley.** # not to proguard android components -keep public class * extends android.app.Activity -keep public class * extends android.app.Fragment -keep public class * extends android.support.v4.app.Fragment -keep public class * extends android.app.Application -keep public class * extends android.app.Service -keep public class * extends android.content.BroadcastReceiver -dontwarn ** -dontnote ** # to generate the mapping.txt file -printmapping mapping.txt