make static

android/app/src/main/java/com/reactnativenavigation/controllers/NavigationActivity.java

     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        ActivityParams params = new ActivityParamsParser().parse(getIntent().getBundleExtra(PARAMS_BUNDLE));
+        ActivityParams params = ActivityParamsParser.parse(getIntent().getBundleExtra(PARAMS_BUNDLE));
 
         modalController = new ModalController();
         navigationReactInstance = new NavigationReactInstance(this);

android/app/src/main/java/com/reactnativenavigation/core/objects/JsonObject.java

     protected Integer getColor(ReadableMap map, String key) {
         return map.hasKey(key) ? Color.parseColor(map.getString(key)) : null;
     }
-    
+
     protected Boolean getBoolean(ReadableMap map, String key) {
         return map.hasKey(key) && map.getBoolean(key);
     }

android/app/src/main/java/com/reactnativenavigation/params/parsers/ActivityParamsParser.java

 import com.reactnativenavigation.params.ActivityParams;
 
 public class ActivityParamsParser {
-    public ActivityParams parse(Bundle params) {
+    public static ActivityParams parse(Bundle params) {
         ActivityParams result = new ActivityParams();
-        result.screenParams = new ScreenParamsParser().parse(params);
+        result.screenParams = ScreenParamsParser.parse(params);
         return result;
     }
 }

android/app/src/main/java/com/reactnativenavigation/params/parsers/ColorParser.java

+package com.reactnativenavigation.params.parsers;
+
+public class ColorParser {
+}

android/app/src/main/java/com/reactnativenavigation/params/parsers/ScreenParamsParser.java

     private static final String KEY_BUTTONS = "titleBarButtons";
     private static final String STYLE_PARAMS = "styleParams";
 
-    public ScreenParams parse(Bundle params) {
+    public static ScreenParams parse(Bundle params) {
         ScreenParams result = new ScreenParams();
         result.screenId = params.getString(KEY_SCREEN_ID);
         result.screenInstanceId = params.getString(KEY_SCREEN_INSTANCE_ID);
         result.passProps = params.getBundle(KEY_PROPS);
-        result.buttons = new TitleBarButtonParamsParser().parse(params.getBundle(KEY_BUTTONS));
+        result.buttons = TitleBarButtonParamsParser.parse(params.getBundle(KEY_BUTTONS));
         result.title = params.getString(KEY_TITLE);
-        result.styleParams = new ScreenStyleParamsParser().parse(params.getBundle(STYLE_PARAMS));
+        result.styleParams = ScreenStyleParamsParser.parse(params.getBundle(STYLE_PARAMS));
         return result;
     }
-
 }

android/app/src/main/java/com/reactnativenavigation/params/parsers/ScreenStyleParamsParser.java

 import com.reactnativenavigation.params.ScreenStyleParams;
 
 public class ScreenStyleParamsParser {
-    public ScreenStyleParams parse(Bundle params) {
+    public static ScreenStyleParams parse(Bundle params) {
         ScreenStyleParams result = new ScreenStyleParams();
         result.statusBarColor = params.getInt("statusBarColor");
         result.topBarColor = params.getInt("topBarColor");

android/app/src/main/java/com/reactnativenavigation/params/parsers/TitleBarButtonParamsParser.java

 import java.util.List;
 
 public class TitleBarButtonParamsParser {
-    public List<TitleBarButtonParams> parse(Bundle params) {
+    public static List<TitleBarButtonParams> parse(Bundle params) {
         List<TitleBarButtonParams> result = new ArrayList<>();
         for (String key : params.keySet()) {
             result.add(parseItem(params.getBundle(key)));
         return result;
     }
 
-    private TitleBarButtonParams parseItem(Bundle bundle) {
+    private static TitleBarButtonParams parseItem(Bundle bundle) {
         TitleBarButtonParams result = new TitleBarButtonParams();
         result.label = bundle.getString("label");
         result.icon = ImageLoader.loadImage(bundle.getString("icon"));
         return result;
     }
 
-    private TitleBarButtonParams.ShowAsAction parseShowAsAction(String showAsAction) {
+    private static TitleBarButtonParams.ShowAsAction parseShowAsAction(String showAsAction) {
         switch (showAsAction) {
-            case "Always":
+            case "always":
                 return TitleBarButtonParams.ShowAsAction.Always;
-            case "Never":
+            case "never":
                 return TitleBarButtonParams.ShowAsAction.Never;
-            case "WithText":
+            case "withText":
                 return TitleBarButtonParams.ShowAsAction.WithText;
-            case "IfRoom":
+            case "ifRoom":
             default:
                 return TitleBarButtonParams.ShowAsAction.IfRoom;
         }