3D Shooters Episode I: Wolfenstein 3D for Android - Pro Android Games - page 186

Event listener : Any class that wishes to receive controller events must implement
the ControllerListener interface. This interface provides the callbacks to handle
button presses:
public interface ControllerListener {
public void ControllerUp(int btnCode);
public void ControllerDown(int btnCode);
}

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Listing 6-10. The Controller Class SNESController.java.

package game.controller;

// ...

public class SNESController {

private Activity mView;

private ControllerListener mListener;

public SNESController(Context context) {
mView = (Activity) context;
init();
}

public SNESController(Context context, AttributeSet attrs) {
mView = (Activity) context;
init();
}

public SNESController(Context context, AttributeSet attrs, int style) {
mView = (Activity) context;
init();
}

public void setListener(ControllerListener l) {
mListener = l;
}

private void init() {
setupControls();
}

private void setupControls() {
// up
mView.findViewById(R.id.btn_up).setOnTouchListener(
new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent evt) {
final ImageButton b = (ImageButton) v;