Why is my MediaRouteButton unavailable for finding any cast devices?

Question

the following are my codes in the main action

public class MainActivity extends ActionBarActivity{
private MediaRouteButton mMediaRouteButton;
private MediaRouteSelector mMediaRouteSelector;
private MediaRouter mMediaRouter;
private CastDevice mSelectedDevice;
private MyMediaRouterCallback mMediaRouterCallback;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    if(this.checkGooglePlaySevices(this))
        Log.v("cc5zhenhua","googleplayservice okay");
    else
    {
        Log.v("cc5zhenhua","googleplayservice not ok");
        //GooglePlayServicesUtil.getErrorDialog(0, this, 0).show();
    }
    //initialize media cast objects
     mMediaRouter=MediaRouter.getInstance(getApplicationContext());      
     mMediaRouteSelector=new MediaRouteSelector.Builder()
     .addControlCategory(CastMediaControlIntent.CATEGORY_CAST).build();      
     mMediaRouterCallback= new MyMediaRouterCallback();
     mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback);    
}

public void onStart() {
    super.onStart();
    mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback
            );
    MediaRouter.RouteInfo route = mMediaRouter.updateSelectedRoute(mMediaRouteSelector);
    // do something with the route...
}
@Override
protected void onResume()
{
    super.onResume();
    mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    super.onCreateOptionsMenu(menu);

    //mMediaRouteButton.setRouteSelector(mMediaRouteSelector);
    return true;
}
@Override
public boolean onPrepareOptionsMenu(Menu menu){
    getMenuInflater().inflate(R.menu.main, menu);
    MenuItem mediaRouteItem = menu.findItem( R.id.action_mediaroute01 );
    MediaRouteActionProvider mediaRouteActionProvider =
            (MediaRouteActionProvider)MenuItemCompat.getActionProvider(
                    mediaRouteItem);
    mediaRouteActionProvider.setRouteSelector(mMediaRouteSelector);
    mMediaRouteButton = (MediaRouteButton) mediaRouteItem.getActionView();
    return true;}

 public  boolean checkGooglePlaySevices(final Activity activity) {
        final int googlePlayServicesCheck = GooglePlayServicesUtil.isGooglePlayServicesAvailable(
                activity);
        switch (googlePlayServicesCheck) {
            case ConnectionResult.SUCCESS:
                return true;
            default:
               Log.v("cc5zhenhua","test");          }
        return false;
 }
private class MyMediaRouterCallback extends MediaRouter.Callback 
{
  @Override
  public void onRouteSelected(MediaRouter router, RouteInfo info) {
    mSelectedDevice = CastDevice.getFromBundle(info.getExtras());
    String routeId = info.getId();
    Log.v("cc5zhenhua", "MainActivity.onRouteSelected");        
  }
  @Override
  public void onRouteUnselected(MediaRouter router, RouteInfo info) {
    //teardown();
    mSelectedDevice = null;
  }
}

}

There is no build error. However, when I start the main action, the media channel button cannot be pressed at all. Please tell me where I missed? Thank!

My color chromatin is registered using APPID before the publication of the new SDK. I also can not use this appID for the management category, it does not exclude valida application exception.

My casting application is also available to expand the chrome in my computer.

Answer 1

, . , sdk googlecast AVD, SDK. , , . .

Answer 2

, :

mMediaRouter.addCallback(mMediaRouteSelector, mMediaRouterCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN);

, . , , ; Chrome http://<chromecast-ip>:9222, , ; , ,