Show modal with animation

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

 
 import com.reactnativenavigation.R;
 import com.reactnativenavigation.layouts.Layout;
+import com.reactnativenavigation.layouts.ModalScreenLayout;
 import com.reactnativenavigation.layouts.ScreenStackContainer;
-import com.reactnativenavigation.layouts.SingleScreenLayout;
 import com.reactnativenavigation.params.ScreenParams;
 import com.reactnativenavigation.params.TitleBarButtonParams;
 import com.reactnativenavigation.params.TitleBarLeftButtonParams;
         setCancelable(true);
         setOnDismissListener(this);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
-        layout = new SingleScreenLayout(getActivity(), screenParams, this);
+        layout = new ModalScreenLayout(getActivity(), null, screenParams, this);
         getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
         setContentView(layout.asView());
     }

android/app/src/main/java/com/reactnativenavigation/layouts/ModalScreenLayout.java

+package com.reactnativenavigation.layouts;
+
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+
+import com.reactnativenavigation.params.ScreenParams;
+import com.reactnativenavigation.params.SideMenuParams;
+import com.reactnativenavigation.views.LeftButtonOnClickListener;
+
+public class ModalScreenLayout extends SingleScreenLayout {
+
+    public ModalScreenLayout(AppCompatActivity activity, @Nullable SideMenuParams sideMenuParams,
+                             ScreenParams screenParams, LeftButtonOnClickListener leftButtonOnClickListener) {
+        super(activity, sideMenuParams, screenParams);
+        this.leftButtonOnClickListener = leftButtonOnClickListener;
+    }
+
+    @Override
+    protected void pushInitialScreen(LayoutParams lp) {
+        stack.pushInitialScreenWithAnimation(screenParams, lp);
+    }
+}

android/app/src/main/java/com/reactnativenavigation/layouts/SingleScreenLayout.java

 public class SingleScreenLayout extends RelativeLayout implements Layout {
 
     private final AppCompatActivity activity;
-    private final ScreenParams screenParams;
+    protected final ScreenParams screenParams;
     private final SideMenuParams sideMenuParams;
-    private ScreenStack stack;
-    private LeftButtonOnClickListener leftButtonOnClickListener;
+    protected ScreenStack stack;
+    protected LeftButtonOnClickListener leftButtonOnClickListener;
     private @Nullable SideMenu sideMenu;
 
-    public SingleScreenLayout(AppCompatActivity activity, ScreenParams screenParams,
-                              LeftButtonOnClickListener leftButtonOnClickListener) {
-        this(activity, null, screenParams);
-        this.leftButtonOnClickListener = leftButtonOnClickListener;
-    }
-
     public SingleScreenLayout(AppCompatActivity activity, @Nullable SideMenuParams sideMenuParams, ScreenParams screenParams) {
         super(activity);
         this.activity = activity;
         }
         stack = new ScreenStack(activity, parent, screenParams.getNavigatorId(), this);
         LayoutParams lp = new LayoutParams(MATCH_PARENT, MATCH_PARENT);
+        pushInitialScreen(lp);
+    }
+
+    protected void pushInitialScreen(LayoutParams lp) {
         stack.pushInitialScreen(screenParams, lp);
         stack.show();
     }

android/app/src/main/java/com/reactnativenavigation/screens/ScreenStack.java

         keyboardVisibilityDetector = new KeyboardVisibilityDetector(parent);
     }
 
+    public void pushInitialScreenWithAnimation(final ScreenParams initialScreenParams, RelativeLayout.LayoutParams params) {
+        pushInitialScreen(initialScreenParams, params);
+        final Screen screen = stack.peek();
+        screen.setOnDisplayListener(new Screen.OnDisplayListener() {
+            @Override
+            public void onDisplay() {
+                screen.show(initialScreenParams.animateScreenTransitions);
+            }
+        });
+    }
+
     public void pushInitialScreen(ScreenParams initialScreenParams, RelativeLayout.LayoutParams params) {
         Screen initialScreen = ScreenFactory.create(activity, initialScreenParams, leftButtonOnClickListener);
         initialScreen.setVisibility(View.INVISIBLE);