Libgdx之截图

关于截图，官方的WIKI给了我们一个demo

public class ScreenShotTest extends ApplicationAdapter {
    Stage stage;
    TextButton btn;

    @Override
    public void create() {
        stage = new Stage();

        TextButton.TextButtonStyle style = new TextButton.TextButtonStyle();
        style.font = new BitmapFont();
        btn = new TextButton("JieTu", style);
        btn.setPosition(100, 100);
        btn.addListener(new ClickListener() {

            @Override
            public void clicked(InputEvent event, float x, float y) {
                takeScreen();
            }

        });
        stage.addActor(btn);

        Gdx.input.setInputProcessor(stage);
    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(0.39f, 0.58f, 0.92f, 1.0f);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        stage.act();
        stage.draw();
    }

    @Override
    public void dispose() {
        stage.dispose();
        btn.getStyle().font.dispose();
    }

    private void takeScreen() {
        byte[] pixels = ScreenUtils.getFrameBufferPixels(0, 0, Gdx.graphics.getBackBufferWidth(), Gdx.graphics.getBackBufferHeight(), true);

        Pixmap pixmap = new Pixmap(Gdx.graphics.getBackBufferWidth(), Gdx.graphics.getBackBufferHeight(), Pixmap.Format.RGBA8888);
        BufferUtils.copy(pixels, 0, pixmap.getPixels(), pixels.length);
        PixmapIO.writePNG(Gdx.files.external("mypixmap.png"), pixmap);
        pixmap.dispose();
        Gdx.app.log("FY", "come here");
    }
    }