将图像添加到标记的infowindow

Question

我想在infowindow中添加一个图像，我已经看到了一些例子但不太了解。 这是我的代码

public class MainActivity extends FragmentActivity {

GoogleMap gmap;
LatLng latlng=null;
String result=null;
final MarkerOptions marker_options=new MarkerOptions();

         @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    gmap=((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.gmap)).getMap();
    gmap.setOnMapClickListener(new OnMapClickListener() {

        @Override
        public void onMapClick(LatLng point) {

            latlng=point;
            new CityAsyncTask(latlng).execute();
        }
    });


    gmap.setInfoWindowAdapter(new InfoWindowAdapter() {

        @Override
        public View getInfoWindow(Marker marker) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public View getInfoContents(Marker marker) {

View view=getLayoutInflater().inflate(R.layout.info_iamge_window, null);
LatLng position=marker.getPosition();
TextView txt_info_image=(TextView) findViewById(R.id.txt_image);
ImageView img_view=(ImageView)findViewById(R.id.info_image);
    txt_info_image.setText(marker.getTitle());
            return view;
        }
    });
}
class CityAsyncTask extends AsyncTask<String, String, String>
{   public CityAsyncTask(LatLng latlng_points) {
    latlng=latlng_points;
    System.out.println("latlng points are:::::"+latlng);
    }

    @Override
    protected String doInBackground(String... params) {
        Geocoder gcoder=new Geocoder(MainActivity.this,Locale.getDefault());
        try
        {
    List<Address> addresses=gcoder.getFromLocation(latlng.latitude, latlng.longitude,1);
    Log.e("Addresses "," :: "+addresses);
    StringBuilder sb=new StringBuilder();
        if(addresses.size()>0)
    {
    Address address=addresses.get(0);
sb.append(address.getAddressLine(0)).append("\n");
    sb.append(address.getCountryName());
                       }
    result=sb.toString();
        }catch(IOException e)
        {
            e.printStackTrace();
        }
        return result;
    }
    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        marker_options.position(latlng);
        marker_options.title(result);
        marker_options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE));

    Marker marker=gmap.addMarker(marker_options);
    marker.showInfoWindow();

    }



}
}