Fixed newScreen render(float delta) method not being called, plus got delta...

Fixed newScreen render(float delta) method not being called, plus got delta frameTime from libGDX. Intro screen is base screen, being just a red screen for now

core/src/com/mygdx/game/GameScreens/GameIntro.java

 package com.mygdx.game.GameScreens;
 
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.scenes.scene2d.ui.Label;
+import com.mygdx.game.singletons.FontManager;
+
 /**
  * Intro screen showing a preview of the game for a few seconds
  */
 public class GameIntro extends GameScreen
 {
+
     @Override
     public void buildStage() {
+        /*Label l = new Label("Intro screen", FontManager.getInstance().getLabelStyle(Color.BLACK));
+        l.setPosition(50, 50);
+        addActor(l);*/
+    }
+
+    @Override
+    public void render(float delta) {
+
+        // Add logic
 
+        // Call the drawing methods of the parent to render the screen
+        super.render(delta);
     }
 }

core/src/com/mygdx/game/GameScreens/GameScreen.java

@@ -22,11 +22,11 @@ public abstract class GameScreen extends Stage implements Screen {
     public abstract void buildStage();
 
     @Override
-    public void render(float delta) {
+    public void render(float delta)
+    {
         // Clear screen
-        Gdx.gl.glClearColor(1, 0, 0, 1);
+        Gdx.gl.glClearColor(255, 0, 0, 1);
         Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
-
         // Calling to Stage methods
         super.act(delta);
         super.draw();

core/src/com/mygdx/game/GameScreens/GameScreenManager.java

@@ -45,9 +45,11 @@ public class GameScreenManager {
     public void showGameScreen(GameScreenEnum gameScreen, Object... args)
     {
         Screen oldScreen = game.getScreen();
+        if(oldScreen != null) oldScreen.hide();
         GameScreen newScreen = gameScreen.getScreen(args);
         newScreen.buildStage();
         game.setScreen(newScreen);
+        newScreen.show();
         if(oldScreen != null) oldScreen.dispose();
     }
 

core/src/com/mygdx/game/TableFootball.java

@@ -22,10 +22,11 @@ public class TableFootball extends Game {
 
 	@Override
 	public void render () {
+		if(screen != null) screen.render(Gdx.graphics.getDeltaTime());
 	}
 	
 	@Override
 	public void dispose () {
-
+		int a = 10;
 	}
 }

core/src/com/mygdx/game/singletons/FontManager.java

+package com.mygdx.game.singletons;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.assets.AssetManager;
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.g2d.BitmapFont;
+import com.badlogic.gdx.graphics.g2d.freetype.FreeTypeFontGenerator;
+import com.badlogic.gdx.scenes.scene2d.ui.Label;
+
+public class FontManager
+{
+    private static FontManager fm = new FontManager();
+
+    private AssetManager am;
+
+    private FontManager()
+    {
+        am = new AssetManager();
+    }
+
+    public static FontManager getInstance()
+    {
+        return fm;
+    }
+
+    public BitmapFont generateFont()
+    {
+        FreeTypeFontGenerator generator = new FreeTypeFontGenerator(Gdx.files.internal("HFF Ice Bergman.ttf"));
+        FreeTypeFontGenerator.FreeTypeFontParameter parameter = new FreeTypeFontGenerator.FreeTypeFontParameter();
+        parameter.size = 30;
+        parameter.borderWidth = 1;
+        parameter.color = Color.BLUE;
+        parameter.shadowOffsetX = 3;
+        parameter.shadowOffsetY = 3;
+        parameter.shadowColor = new Color(0, 0.5f, 0, 0.75f);
+        BitmapFont font = generator.generateFont(parameter); // font size 24 pixels
+        generator.dispose();
+
+        return font;
+    }
+
+    public Label.LabelStyle getLabelStyle(Color fontColor)
+    {
+        Label.LabelStyle l = new Label.LabelStyle();
+        l.font = generateFont();
+        l.fontColor = fontColor;
+        return l;
+    }
+}