你不能使用asynctask . Volley关心它 . 您可以使用回调来处理数据和ui . 看起来像这样：

public class LoginActivity extends SinglePaneActivity implements DownloadCallback {

//...

public void sendRequest(){

Downloader download = new Download(this);

downloader.download(userName, password);

progresbar.show();

}

public void requestFinish(){

progersbar.dismis();

//... continue

}

}

打回来：

public interface DownloadCallback {

void requestFinish();

}

在课程下载器中

private RequestQueue requestQueue;

DownloadCallback mcallback;

public void Downloader(DownloadCallback callback){

mCallback = callback;

requestQueue = Volley.newRequestQueue(mContext);

initVolleyListeners();

}

private void initVolleyListeners() {

mSuccessListener = new Response.Listener() {

@Override

public void onResponse(JSONObject response) {

mCallback.requestFinish();

}

};

mErrorListener = new Response.ErrorListener() {

@Override

public void onErrorResponse(VolleyError error) {

mCallback.requestFinish();

}

};

public void download(String user, String pass){

JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, createJson(user, pass), mSuccessListener , mErrorListener ) {

//header for send JSON to server

@Override

public Map getHeaders() throws AuthFailureError {

HashMap headers = new HashMap();

headers.put("Content-Type", "application/json; charset=utf-8");

return headers;

}

};

requestQueue.add(jsonObjectRequest );

}

还有一点 . 不要在json中发送用户名 . 你把它作为param发送到 Headers 中 . 使用此 application/x-www-form-urlencoded 并设置将用户名传递为 Headers 中的params .