Enable minify

Signed-off-by: Fung <fython@163.com>

Author: fython

app/build.gradle

@@ -13,7 +13,8 @@ android {
     }
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
+            shrinkResources true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }

app/proguard-rules.pro

@@ -1,25 +1,8 @@
-# Add project specific ProGuard rules here.
-# By default, the flags in this file are appended to flags specified
-# in G:\adt\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
+-dontwarn kotlin.**
+-dontobfuscate
+-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*,!code/allocation/variable
 
-# Add any project specific keep options here:
+-keep class moe.feng.nyanpasu.pinsettings.util.Preferences {*;}
 
-# 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 *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+-keepattributes Signature
+-keepattributes Exceptions