How to use

InputMultiplexer

in

com.badlogic.gdx

public InputWrapper (Input input) {
  this.input = input;
  this.multiplexer = new InputMultiplexer();
  this.multiplexer.addProcessor(this);
  input.setInputProcessor(multiplexer);
}

@Override
public void setInputProcessor (InputProcessor processor) {
  multiplexer.removeProcessor(lastProcessor);
  multiplexer.addProcessor(processor);
  lastProcessor = processor;
}

@Override
public void create () {
  super.create();
  createHUD();
  Gdx.input.setInputProcessor(new InputMultiplexer(hud, this, inputController));
}

@Override
public void create () {
  setupScene();
  setupUI();
  setupShaders();
  multiplexer.addProcessor(ui);
  multiplexer.addProcessor(controller);
  Gdx.input.setInputProcessor(multiplexer);
  // renderer = new ImmediateModeRenderer20(false, true, 0);
}

@Override
public InputProcessor getInputProcessor() {
  input.clear();
  input.addProcessor(this);
  input.addProcessor(bodySelectInput);
  return input;
}

Gdx.app.postRunnable(() -> {
  if (!im.getProcessors().contains(inputController, true))
    im.addProcessor(im.size(), inputController);
Gdx.app.postRunnable(() -> {
  im.removeProcessor(inputController);

redStage = new Stage();
blackStage = new Stage();
plexer = new InputMultiplexer();
plexer.addProcessor(hudStage);
final TextButton switchButton = new TextButton("switch",skin);
switchButton.addListener(new ClickListener(){
      plexer.removeProcessor(redStage);
      plexer.addProcessor(blackStage);
      plexer.addProcessor(redStage);
      plexer.removeProcessor(blackStage);

 InputMultiplexer inputMultiplexer = (InputMultiplexer) Gdx.input.getInputProcessor();
if (!inputMultiplexer.getProcessors().contains(stageMainMenu))
  inputMultiplexer.addProcessor(stageMainMenu);

  @Override
  public void clicked (InputEvent event, float x, float y) {
    ((InputWrapper)Gdx.input).multiplexer.removeProcessor(ui);
    test = instancer.instance();
    Gdx.app.log("GdxTestGwt", "Clicked on " + test.getClass().getName());
    test.create();
    test.resize(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
  }
});

@Nonnull
public Array<InputProcessor> getCustomProcessors() {
 return nonNiftyCustomInputMultiplexer.getProcessors();
}

public void clearCustomProcessors() {
 nonNiftyCustomInputMultiplexer.clear();
}

public int getCustomProcessorCount() {
 return nonNiftyCustomInputMultiplexer.size();
}

@Override
public void resize (int width, int height) {
  Gdx.input.setInputProcessor(new InputMultiplexer(ui, cameraInputController));
  Gdx.gl.glViewport(0, 0, width, height);
  worldCamera.viewportWidth = width;
  worldCamera.viewportHeight = height;
  worldCamera.update();
  ui.getViewport().setWorldSize(width, height);
  ui.getViewport().update(width, height, true);
}

((InputWrapper)Gdx.input).multiplexer.addProcessor(ui);

public void clearProcessors() {
  processors.clear();
  processors.addProcessor(new GestureDetector(this));
  Gdx.input.setInputProcessor(processors);
}

Gdx.app.postRunnable(() -> {
  if (!im.getProcessors().contains(inputController, true))
    im.addProcessor(im.size(), inputController);
  Gdx.app.postRunnable(() -> {
    im.removeProcessor(inputController);

public void removeCustomProcessor(final int index) {
 nonNiftyCustomInputMultiplexer.removeProcessor(index);
}

@Nonnull
public Array<InputProcessor> getCustomProcessors() {
 return nonNiftyCustomInputMultiplexer.getProcessors();
}

public void clearCustomProcessors() {
 nonNiftyCustomInputMultiplexer.clear();
}

public int getCustomProcessorCount() {
 return nonNiftyCustomInputMultiplexer.size();
}