Added a base set of Proguard rules in case optimization is enabled

app/proguard-rules.pro

@@ -9,9 +9,26 @@
 
 # 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 *;
-#}
+# Pebble BG-JS
+-keepclassmembers class * {
+    @android.webkit.JavascriptInterface <methods>;
+}
+-keepclassmembers class nodomain.freeyourgadget.gadgetbridge.service.devices.pebble.webview.JSInterface {
+    public *;
+}
+-keepattributes JavascriptInterface
+
+# https://github.com/tony19/logback-android/issues/29
+-dontwarn javax.mail.**, javax.naming.Context, javax.naming.InitialContext
+
+# To avoid any stacktrace ambiguity
+-keepattributes SourceFile,LineNumberTable
+
+# GreenDAO 2 - http://greenrobot.org/greendao/documentation/technical-faq/
+-keepclassmembers class * extends de.greenrobot.dao.AbstractDao {
+    public static java.lang.String TABLENAME;
+}
+
+-keep class **$Properties
+
+-keep class **$Properties { *; }