java io ioexception 无法解析来自服务器地理编码器的响应

I am using this code to get geographical addresses:

private String getAddress(Location location)
{
    try{
        List<Address>   addresses = new Geocoder(this,Locale.getDefault()).getFromLocation(location.getLatitude(), location.getLongitude(), 1);
        if(addresses!=null)
        {
            String address="Address not available";

            for(int i=0;i<addresses.size();i++) 
            {

                Address addre=addresses.get(i);

                String street=addre.getAddressLine(0);
                if(null==street)
                    street="";

                String city=addre.getLocality();
                if(city==null) city="";

                String state=addre.getAdminArea();
                if(state==null) state="";


                String country=addre.getCountryName();
                if(country==null) country="";

                address=street+", "+city+", "+state+", "+country;

            }
            return address;
        }

    }
    catch (Exception e) {
        return "Address not available";
    }
    return "Address not available";
}

之前我得到一个地址列表返回，但现在我每次都得到这个异常:

java.io.IOException unable to parse response from server