added method to get versionCode of mobile app to JSInterface

mobile/plugins/user-location.user.js

@@ -47,6 +47,8 @@ window.plugin.userLocation.setup = function() {
 
 window.plugin.userLocation.updateLocation = function(lat, lng) {
     var latlng = new L.LatLng(lat, lng);
+    var foo = android.getVersionCode();
+    window.console.log('version code: ' + foo);
     window.plugin.userLocation.marker.setLatLng(latlng);
 }
 

mobile/src/com/cradle/iitc_mobile/IITC_JSInterface.java

@@ -13,6 +13,8 @@ import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.DialogInterface.OnMultiChoiceClickListener;
 import android.content.Intent;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.util.Log;
 import android.view.View;
 import android.webkit.JavascriptInterface;
@@ -79,6 +81,19 @@ public class IITC_JSInterface {
                 .show();
     }
 
+    @JavascriptInterface
+    public int getVersionCode() {
+        int versionCode = 0;
+        try {
+            PackageInfo pInfo = mContext.getPackageManager()
+                    .getPackageInfo(mContext.getPackageName(), 0);
+            versionCode = pInfo.versionCode;
+        } catch (PackageManager.NameNotFoundException e) {
+            e.printStackTrace();
+        }
+        return versionCode;
+    }
+
     @JavascriptInterface
     public void switchToPane(String id) {