使用handler和Message获取xutils发送POST请求从服务器端返回数据

注意：应该在handleMessage中处理从服务器返回的数据，否则会因为线程问题拿不到结果。另外可以在onSuccess方法中更新UI，因为xutils封装了handler。

public class MainActivity extends Activity{
    private String responseInfo;
    private Handler handler;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                responseInfo = (String) msg.obj;
                Gson gson = new Gson();
                Type type = new TypeToken<JsonBean>() {
                }.getType();
                JsonBean jsonBean = gson.fromJson(responseInfo, type);
                System.out.println(jsonBean);
            }
        };
        getFromServer();
    }
    
    /**
     * 使用xutils发送POST请求得到服务器返回的数据
     */
    public void getFromServer() {
        String url = "http://182.92.195.162:8088/index.php?r=api/client/init";
        RequestParams params = new RequestParams();
        JSONObject json = new JSONObject();
        JSONObject request = new JSONObject();
        try {
            json.put("uid", "");
            json.put("sid", "");
            json.put("ver", "1");
            json.put("request", request);
            params.addBodyParameter("json", json.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        HttpUtils http = new HttpUtils();
        http.send(HttpMethod.POST, url, params, new RequestCallBack<String>() {
            @Override
            public void onFailure(HttpException arg0, String arg1) {

            }

            @Override
            public void onSuccess(ResponseInfo<String> arg0) {
                Message msg = Message.obtain();
                msg.obj = arg0.result;
                handler.sendMessage(msg);
            }
        });
    }
}