Fix proguard optimization rules

Signed-off-by: Muntashir Al-Islam <[email protected]>

Author: MuntashirAkon

app/proguard-rules.pro

@@ -1,25 +1,15 @@
-# Add project specific ProGuard rules here.
-# By default, the flags in this file are appended to flags specified
-# in /home/harsha/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
+-keep class com.google.gson.reflect.TypeToken { *; }
+-keep class * extends com.google.gson.reflect.TypeToken
 
-# Add any project specific keep options here:
-
-# 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 *;
-#}
+-keepattributes Signature
+-keepclassmembers class * {
+  @com.google.gson.annotations.SerializedName <fields>;
+}
 
-# This is not required because of the "Keep" annotation, keep for completeness
--keepclassmembers class io.github.muntashirakon.bcl.ControlFile {
-   private *;
+-keep class io.github.muntashirakon.bcl.ControlFile {
+   *;
 }
+
 # This is safe for Android >= 2.0
 -optimizations code/simplification/arithmetic