有没有一种干净的方法可以使libgdx跨平台控件实现

Question

I am currently just started working with Libgdx. I reached a point where I would like to consider cross-platform (PC/handheld) issues. One important issue I can't seem to find a way around it is the following: I don't want each controllable entity to be an extension of InputAdapter, and then contain if(PC){switch: case key: increaseSpeed(); } else if(handheld) {switch: case touch: increaseSpeed();}

Is there a to implement something so that the entities would just receive the Program-related meanings of user-inputs?

Sorry if my question is too vague :' (

Answer 1

You should have a look at this: Interfacing with plaform specific code .

But in your case you would probably not use an interface . The basic idea is that in your different platform specific projects, you would implement an InputAdapter , for example DesktopController extends InputAdapter . Then you would supply this InputAdapter to your ApplicationListener . Somehow like this:

public class MyGame implements ApplicationListener {
    private final InputAdapter controller;

    public MyGame(InputAdapter controller) {
        this.controller = controller;
        // this controller can now be used
        // Gdx.input.setInputProcessor(controller);
    }

}

public static void main(String[] argv) {
    LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
    new LwjglApplication(new MyGame(new DesktopController()), config);
}

Answer 2

Generally Libgdx apps just handle all the inputs, and don't worry about which device they're on. Like this:

...

@Override
public boolean keyDown(int keycode) {
    if (keycode == Keys.RIGHT)
        increaseSpeed();
    return true;
}

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
    increaseSpeed();
    return true;
}

This is using the event-based InputProcessor to handle input events.

LibGDX does map desktop mouse events onto "touch" events so you can collapse that part of PC/Android input handling, but there is nothing generic that maps keyboard keys to touch events or anything like that.