chore: enabling code shrinking and obfuscation in the example app and… (

#102)

README.md

@@ -32,6 +32,9 @@ Add this dependency to your project's build file:
   }
 ```
 
+Add the ProGuard rules found in example/proguard-rules.pro to your project's rules if you build 
+enables code shrinking or obfuscation
+
 ## Features
 
 - [TextElement](https://developers.basistheory.com/docs/sdks/mobile/android/types#textelement) to securely collect text input

example/build.gradle

@@ -22,7 +22,8 @@ android {
 
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
+            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }

example/proguard-rules.pro

@@ -1,21 +1,14 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
+-dontwarn javax.validation.valueextraction.UnwrapByDefault
+-dontwarn javax.validation.valueextraction.ValueExtractor
 
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
+# Needed to keep generic signatures
+-keepattributes Signature
 
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
+# Used by Gson serialization and deserialization internally in BT's SDK
+-keep class com.google.gson.reflect.TypeToken { *; }
+-keep class * extends com.google.gson.reflect.TypeToken
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+# BT's SDK classes
+-keep class com.basistheory.** {
+    *;
+}