LibGDX :如何通过触摸移动？

public class MyGame extends ApplicationAdapter implements InputProcessor {
    private SpriteBatch batch;
    private Texture characterTexture;
    private Vector2 characterPosition;

    @Override
    public void create() {
        batch = new SpriteBatch();
        characterTexture = new Texture("character.png");
        characterPosition = new Vector2(0, 0);

        Gdx.input.setInputProcessor(this);
    }

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

        batch.begin();
        batch.draw(characterTexture, characterPosition.x, characterPosition.y);
        batch.end();
    }

    @Override
    public boolean touchDragged(int screenX, int screenY, int pointer) {
        // 将屏幕坐标转换为游戏世界坐标
        Vector3 worldCoordinates = new Vector3(screenX, screenY, 0);
        camera.unproject(worldCoordinates);

        // 更新角色位置
        characterPosition.x = worldCoordinates.x - characterTexture.getWidth() / 2;
        characterPosition.y = worldCoordinates.y - characterTexture.getHeight() / 2;

        return true;
    }

    // 其他InputProcessor方法的实现...

    @Override
    public void dispose() {
        batch.dispose();
        characterTexture.dispose();
    }
}