Enable proguard for the android app

.gitignore

@@ -317,3 +317,5 @@ fastlane/report.xml
 fastlane/Preview.html
 fastlane/screenshots
 fastlane/test_output
+
+androidApp/keystore\.properties

androidApp/app/build.gradle

@@ -36,16 +36,20 @@ android {
     }
     buildTypes {
         release {
-            // Before enabling Proguard, you must update the proguard rules to include Firebase
-            // See https://travis-ci.org/RowanACM/ACMAppAndroid/builds/203307727
-            minifyEnabled false
-
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            debuggable false
             signingConfig signingConfigs.release
+
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         debug {
+            debuggable true
             signingConfig signingConfigs.debug
 
+            minifyEnabled true
+            useProguard true
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+
             applicationIdSuffix '.dev'
             versionNameSuffix '-dev'
         }

androidApp/app/proguard-rules.pro

@@ -1,17 +1,31 @@
-# Add project specific ProGuard rules here.
-# By default, the flags in this file are appended to flags specified
-# in /Users/Tyler/Library/Android/sdk/tools/proguard/proguard-android.txt
-# You can edit the include path and order by changing the proguardFiles
-# directive in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
+# Project specific ProGuard rules
+# See https://github.com/krschultz/android-proguard-snippets
 
-# Add any project specific keep options here:
+-dontobfuscate
+-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*,!code/allocation/variable
 
-# 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 *;
-#}
+# Retrofit 2.X
+# https://square.github.io/retrofit/
+-dontwarn retrofit2.**
+-keep class retrofit2.** { *; }
+-keepattributes Signature
+-keepattributes Exceptions
+-keepclasseswithmembers class * {
+    @retrofit2.http.* <methods>;
+}
+
+# Okio
+-keep class sun.misc.Unsafe { *; }
+-dontwarn java.nio.file.*
+-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
+-dontwarn okio.**
+
+# OkHttp
+-dontwarn okhttp3.**
+-dontwarn javax.annotation.*
+
+# Google Play Services
+-dontwarn com.google.android.gms.**
+
+# Picasso
+-dontwarn com.squareup.okhttp.**

androidApp/build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.1.4-2'
+    ext.kotlin_version = '1.2.0'
     repositories {
         jcenter()
         mavenCentral()
@@ -11,7 +11,7 @@ buildscript {
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
 
-        classpath 'com.android.tools.build:gradle:3.0.0-beta7'
+        classpath 'com.android.tools.build:gradle:3.0.1'
         classpath 'com.google.gms:google-services:3.1.0'
         classpath 'com.github.triplet.gradle:play-publisher:1.1.5'
         classpath 'com.google.firebase:firebase-plugins:1.1.0'
@@ -29,7 +29,7 @@ allprojects {
     }
 
     ext {
-        googlePlayServicesVersion = '11.4.2'
+        googlePlayServicesVersion = '11.8.0'
         supportLibVersion = '25.4.0'
     }
 }