Otto Main Thread Bus

MainThreadBus.java

public class MainThreadBus extends Bus {
  private final Bus mBus;
  private final Handler mHandler = new Handler(Looper.getMainLooper());

  public MainThreadBus(final Bus bus) {
    if (bus == null) {
      throw new NullPointerException("bus must not be null");
    }
    mBus = bus;
  }

  @Override public void register(Object obj) {
    mBus.register(obj);
  }

  @Override public void unregister(Object obj) {
    mBus.unregister(obj);
  }

  @Override public void post(final Object event) {
    if (Looper.myLooper() == Looper.getMainLooper()) {
      mBus.post(event);
    } else {
      mHandler.post(new Runnable() {
        @Override public void run() {
          mBus.post(event);
        }
      });
    }
  }