问题
issue is next one: my game is built for 1080x1920 pixels screen but if I run it in other resolutions my actors' position is switching.
Some pictures if you haven't understood:
~> original resolution
~> other resolution
I looked for an answer for days in Google, Stackoverflow, forums, couldn't find the right answer for my problem, here's my code:
public class PlayScreen implements Screen {
private Main game;
private Stage stage;
Music music;
Sound sound;
private class MenuGame extends Actor {
Texture menu = new Texture(Gdx.files.internal("sprite/menu.png"));
@Override
public void draw(Batch batch, float alpha) {
batch.draw(menu, 0, 0,Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
}
}
private class NewGame extends Actor {
Texture newgame = new Texture(Gdx.files.internal("sprite/new.png"));
@Override
public void draw(Batch batch, float alpha) {
batch.draw(newgame, 350, 1000);
}
}
private class LoadGame extends Actor {
Texture loadgame = new Texture(Gdx.files.internal("sprite/load.png"));
@Override
public void draw(Batch batch, float alpha) {
batch.draw(loadgame, 350, 830);
}
}
private class CreditsGame extends Actor {
Texture creditsgame = new Texture(Gdx.files.internal("sprite/credits.png"));
@Override
public void draw(Batch batch, float alpha) {
batch.draw(creditsgame, 350, 660);
}
}
private class DonsGame extends Actor {
Texture donsgame = new Texture(Gdx.files.internal("sprite/dons.png"));
@Override
public void draw(Batch batch, float alpha) {
batch.draw(donsgame, 350, 490);
}
}
// our create()
public PlayScreen(final Main game) {
this.game = game;
Gdx.input.setInputProcessor(stage);
final Sound sound = Gdx.audio.newSound(Gdx.files.internal("sound/buttonsound.mp3"));
music = Gdx.audio.newMusic(Gdx.files.internal("sound/brun.mp3"));
music.setLooping(true);
music.setVolume(0.2f);
music.play();
// actors
MenuGame menu = new MenuGame(); // BACKGROUND
stage.addActor(menu);
final NewGame newGame = new NewGame(); // BOUTON NEW
stage.addActor(newGame);
newGame.setX(350);
newGame.setY(1000);
newGame.setWidth(410);
newGame.setHeight(100);
LoadGame loadGame = new LoadGame(); // BOUTON LOAD
stage.addActor(loadGame);
loadGame.setX(350);
loadGame.setY(830);
loadGame.setWidth(410);
loadGame.setHeight(100);
CreditsGame creditsGame = new CreditsGame(); // BOUTON CREDITS
stage.addActor(creditsGame);
creditsGame.setX(350);
creditsGame.setY(660);
creditsGame.setWidth(410);
creditsGame.setHeight(100);
DonsGame donsGame = new DonsGame(); // BOUTON DONS
stage.addActor(donsGame);
donsGame.setX(350);
donsGame.setY(490);
donsGame.setWidth(410);
donsGame.setHeight(100);
// actions
newGame.addListener(new ClickListener() {
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) // NEW BOUTON ACTION
{
sound.play(0.2f);
music.stop();
game.setScreen(new Story(game));
return true;
}
});
loadGame.addListener(new ClickListener() {
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) // LOAD BOUTON ACTION
{
sound.play(0.2f); //faire un truc ici
return true;
}
});
creditsGame.addListener(new ClickListener() {
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) // CREDITS BOUTON ACTION
{
sound.play(0.2f);//faire un truc ici
return true;
}
});
donsGame.addListener(new ClickListener() {
public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) // DONS BOUTON ACTION
{
sound.play(0.2f);//faire un truc ici
return true;
}
});
}
@Override
public void show() {
}
@Override
public void render(float delta) {
Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
stage.draw();
}
@Override
public void resize(int width, int height) {
}
@Override
public void pause() {
}
@Override
public void resume() {
}
@Override
public void hide() {
}
@Override
public void dispose() {
stage.dispose();
music.dispose();
sound.dispose();
}
}
回答1:
You are positioning everything after hardcoded values. So right now your game is very resolution depended.
What you need to use is Viewports. Here are some links to get you started:
Brent Aureli - Aspect Ratios & Viewports
libgdx github - viewports
libgdx github - scene2d
回答2:
this is happening because different devices has different screen size. so it will appear differently . to avoid this you must use the viewPort .for more clarification you must read the libgdx api about the multi resolution and the viewPort . here i will suggest you some sample code to avoid this multi screen issue. please follow this pattern which acan solve your problem.
// in your main class
public class myGame extends ApplicationAdapter {
public OrthographicCamera camera
public Viewport viewPort
private SpriteBatch batch;
private BitMapFont myScoreFont
public myGame() {
}
@Override
public void create() {
myScoreFont = new BitmapFont(Gdx.files.internal(font.txt), true);
batch = new SpriteBatch();
float w = Gdx.graphics.getWidth();
float h = Gdx.graphics.getHeight();
camera = new OrthographicCamera();
camera.position.set(0, 0, 0);
camera.update();
camera.setToOrtho(false, Constants.APP_WIDTH, Constants.APP_HEIGHT);
viewPort = new FillViewport(1280, 800, camera);
}
@Override
public void dispose() {
batch.dispose();
}
@Override
public void render() {
Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT);
float deltaTime = Gdx.graphics.getDeltaTime();
batch.setProjectionMatrix(camera.combined);
batch.begin();
myScoreFont.draw(batch,"myText",0,0)
batch.end();
}
@Override
public void resize(int width, int height) {
viewPort.update(width, height);
}
@Override
public void pause() {
}
@Override
public void resume() {
}
}
for more details you must read the below link about the viewport
https://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/utils/viewport/FillViewport.html
来源：https://stackoverflow.com/questions/39718125/java-libgdx-keep-actors-position-even-screens-resolution-changes