元素在不同的屏幕尺寸上改变位置

Question

所以我在手机上运行我的应用程序，因为我一直在向它发展，所以一切都很好。然后我尝试在平板电脑上运行该应用，我的textBoxes出现在屏幕上完全不同的位置。我正在使用Libgdx框架，这就是这个类的样子：

public class StoneScreen implements Screen {

OrthographicCamera camera;
final TombStone game;

//Textures and art.
public Texture background, sdStone, arrowBack;
public Sprite backgrounds;

//TextField´s stuff
private Stage stage;
private Skin skin;
ImageButton btnArrow;
float screenWidth, screenHeight, stoneHeight, stoneWidth;

//private FitViewport viewport;

public StoneScreen(TombStone gam)    {
    this.game = gam;

    //Set´s the current device´s height and width into a float for easier usage
   screenWidth = Gdx.graphics.getWidth();
   screenHeight = Gdx.graphics.getHeight();

   //Set´s the tombstones height and width
   stoneHeight = screenHeight * 0.60f;
   stoneWidth = screenWidth *0.60f;

   //viewport = new FitViewport(camera, screenWidth, screenHeight)

    camera = new OrthographicCamera();
    camera.setToOrtho(false, screenWidth, screenHeight);

    game.assets.load();
    loadStandard();

}

public void loadStandard(){
    background = game.assets.background;
    sdStone = game.assets.sdStone;
    //backgrounds = Assets.backgrounds;
}

@Override
public void render(float delta) {
    Gdx.gl.glClearColor(0, 0, 0.2f,1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    //Recieves the screen width and height
    float gameHeight = Gdx.graphics.getHeight();
    float gameWidth = Gdx.graphics.getWidth();


    camera.update();
    game.batch.setProjectionMatrix(camera.combined);


    game.batch.begin();
    Gdx.app.log("X", "FPS:" + Gdx.graphics.getFramesPerSecond());



    game.batch.draw(background,0,0, screenWidth, screenHeight);

    game.batch.draw(sdStone, screenWidth *0.20f, screenHeight * 0.20f, screenWidth * 0.60f, screenHeight * 0.60f);

    //SpriteBatch batcher = (SpriteBatch)stage.getBatch();


    game.batch.end();

    stage.act(Gdx.graphics.getDeltaTime());
    stage.draw();
}

@Override
public void resize(int width, int height) {
    // TODO Auto-generated method stub

}

@Override
public void show() {    

    //Generates the new font
    FreeTypeFontGenerator generator = new FreeTypeFontGenerator(Gdx.files.internal("NothingYouCouldDoBold.ttf"));
    FreeTypeFontParameter parameter = new FreeTypeFontParameter();
    parameter.size = 30;
    BitmapFont textFont = generator.generateFont(parameter);
    generator.dispose(); //Avoiding memory leaks.




Preferences prefs = Gdx.app.getPreferences("preferences");

Skin skin = new Skin();
Skin textSkin = new Skin();

stage = new Stage();
Gdx.input.setInputProcessor(stage);
//Sets skin
skin = new Skin(Gdx.files.internal("uiskin.json"));
//Sets a color to the new font
Color fontcolor = Color.BLACK;

//Sets a new font to the textare n the textfield
TextFieldStyle textstyle = new TextFieldStyle();
textstyle.font = textFont;
textstyle.fontColor = fontcolor;

final TextArea textArea = new TextArea(prefs.getString("textArea", "Enter text:"), textstyle);
textArea.setX(420);
textArea.setY(700);
textArea.setWidth(350);
textArea.setHeight(350);
textArea.setMaxLength(50);


final TextField textField = new TextField(prefs.getString("textField", "Enter name:"), textstyle);

    textField.setX(420);
    textField.setY(800);
    textField.setMaxLength(20);
    textField.setWidth(350);
    textField.setHeight(100);





    //String text = Gdx.app.getPreferences("prefs").getString("text", "Default text if missimg");
    //TextField textField = new TextField(text, skin);

    //Backbutton 
            ImageButtonStyle styleTwo = new ImageButtonStyle();
            TextureRegionDrawable arrowImage = new TextureRegionDrawable(new TextureRegion(new Texture("arrowLeft.png")));
            styleTwo.up = skin.newDrawable(skin.newDrawable(arrowImage));
            styleTwo.down = skin.newDrawable(skin.newDrawable(arrowImage));

            //Back button
    btnArrow = new ImageButton(styleTwo);

    btnArrow.setSize(150, 150);
    btnArrow.setPosition(450, 10);

    stage.addActor(textArea);
    stage.addActor(textField);
    stage.addActor(btnArrow);


    //Backbutton takes us back to mainmenu
            btnArrow.addListener(new ChangeListener() {

                @Override
                public void changed(ChangeEvent event, Actor actor) {
                    game.setScreen(new MainScreen(game));


                    //Saves the entered text.

                    Preferences prefs = Gdx.app.getPreferences("preferences");
                    prefs.putString("textField", textField.getText());
                    prefs.putString("textArea", textArea.getText());
                    prefs.flush();
                }


            });

}

@Override
public void hide() {
    // TODO Auto-generated method stub

}

@Override
public void pause() {
    // TODO Auto-generated method stub

}

@Override
public void resume() {
    // TODO Auto-generated method stub

}

@Override
public void dispose() {
    // TODO Auto-generated method stub.

}
}

我真的无法弄清楚如何解决这个问题。我尝试谷歌一些解决方案，但他们没有得到任何帮助。 TextField和TextArea是给我带来麻烦的。