Current thread has not called Looper.prepare(). Forcing synchronous mode

Question

I am getting Current thread has not called Looper.prepare(). Forcing synchronous mode warning in logcat.So that I can't get into onsuccess response handler.

I referred this post.But it didn't worked for me.

Stacktrace:

01-19 22:52:30.683: W/AsyncHttpRH(23815): Current thread has not called Looper.prepare(). Forcing synchronous mode.

01-19 22:52:30.685: W/System.err(23815): java.lang.IllegalArgumentException: Synchronous ResponseHandler used in AsyncHttpClient. You should create your response handler in a looper thread or use SyncHttpClient instead.
01-19 22:52:30.686: W/System.err(23815):    at com.loopj.android.http.AsyncHttpClient.sendRequest(AsyncHttpClient.java:1493)
01-19 22:52:30.686: W/System.err(23815):    at com.loopj.android.http.AsyncHttpClient.get(AsyncHttpClient.java:1078)
01-19 22:52:30.686: W/System.err(23815):    at com.loopj.android.http.AsyncHttpClient.get(AsyncHttpClient.java:1052)
01-19 22:52:30.686: W/System.err(23815):    at agriya.talkr.localdb.RestClient.get(RestClient.java:29)
01-19 22:52:30.686: W/System.err(23815):    at agriya.talkr.localdb.ServerCallee.execute(ServerCallee.java:77)
01-19 22:52:30.686: W/System.err(23815):    at agriya.talkr.CreateGroup$synchronizeInBg.doInBackground(CreateGroup.java:213)
01-19 22:52:30.686: W/System.err(23815):    at agriya.talkr.CreateGroup$synchronizeInBg.doInBackground(CreateGroup.java:1)
01-19 22:52:30.686: W/System.err(23815):    at android.os.AsyncTask$2.call(AsyncTask.java:292)
01-19 22:52:30.686: W/System.err(23815):    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
01-19 22:52:30.686: W/System.err(23815):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
01-19 22:52:30.686: W/System.err(23815):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
01-19 22:52:30.686: W/System.err(23815):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
01-19 22:52:30.686: W/System.err(23815):    at java.lang.Thread.run(Thread.java:818)

Below I have posted the code and pointed out the error line:

CreatGroup.java:

public class CreateGroup extends AppCompatActivity {

........
........

    @Override
        protected String doInBackground(String... params) {
          try {

       .......
      ServerCallee.execute(Constants.SERVER_CALL_newGroup, map); --->213th line
    } catch (JSONException e) {

        e.printStackTrace();
        return "1";

        }

ServerCallee.java:

public static void execute(final Constants _service, HashMap<String, String> params){

  ........
  ........


 RestClient.get(null, rqm, new JsonHttpResponseHandler(){  --->77th line

 ........
    @Override
    public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
        System.out.println("onFailure - String: " + _service.toString());

        Log.e("fail 1", "Test");


     }
      .......(On Success response handler)

RestClient.java:

 public class RestClient {

          private static AsyncHttpClient client = new AsyncHttpClient();

      public static void get( String url,  RequestParams params, final JsonHttpResponseHandler responseHandler) {

              client.get(getAbsoluteUrl(url), params, responseHandler); -->29th line

          }

          public static void post(final String url, final RequestParams params, final JsonHttpResponseHandler responseHandler) {

             client.get(getAbsoluteUrl(url), params, responseHandler);

          }
    }

@Jordan I don't know right now what i did on that time.sorry — Stephen, Dec 13 '17 at 10:03
I have searched a bit. It seems that there is a minor bug in this library. For future references check [this](https://github.com/loopj/android-async-http/issues/828). — Jordan, Dec 13 '17 at 12:24

score 7 · Accepted Answer · answered Jan 19 '16 at 13:26

7

Although you did not show it, it seems you call this from an AsyncTask. In this case you can use the SyncHttpClient as suggested by the error message.

answered Jan 19 '16 at 13:26

Henry

42,982
7
68
84

score 0 · Answer 2 · answered Sep 17 '20 at 10:20

0

In my case. Previously i was using

AsyncHttpClient client = new AsyncHttpClient();

Then i changed it to:

SyncHttpClient client = new SyncHttpClient();

client.get(CommentActivity.this, url, params , new JsonHttpResponseHandler()......

answered Sep 17 '20 at 10:20

vijayraj34

2,135
26
27

Current thread has not called Looper.prepare(). Forcing synchronous mode

2 Answers2