small changes

app/proguard-rules.pro

@@ -1,21 +1,15 @@
-# 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
+# Gson models used for API parsing.
+-keep class com.tomhempel.coordinatorapp.data.** { *; }
+-keep class com.tomhempel.coordinatorapp.network.** { *; }
 
-# 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 *;
-#}
+# AndroidX Security crypto (EncryptedSharedPreferences / MasterKey)
+-keep class androidx.security.crypto.** { *; }
 
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
+# Gson reflective serialization
+-keepattributes Signature
+-keepattributes *Annotation*
+-dontwarn sun.misc.**
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+# Keep line numbers for crash reports.
+-keepattributes SourceFile,LineNumberTable
+-renamesourcefileattribute SourceFile