stop UI thread until http responses

Question

I need to get data from a server via a php script I'm using an AsyncHttpClient and an AsyncHttpResponseHandler from the loopj library.

public void buttonListener (View view) {
    if (view.getId() == R.id.button) {
        //start loading...

        AsyncHttpClient client = new AsyncHttpClient();
        client.get("http://host.com/data.php", new AsyncHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                //loading succeeded

                //now I can parse the byte[] responseBody to a JSONObject...
            }

            @Override
            public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
                //loading failed
            }
        });

        //I want my program to stop at this point until onSuccess() or onFailure() is called
    }
}

At the described point in my program I want to wait until the server does response. I found some examples using Threads and the methods wait() and notifyAll() but I've no idea how to use them in my situation.

Can anybody help me?

THX

You should not block the UI thread, your application will stop responding and the system will offer the user a dialog to kill it — StenSoft, Jan 09 '16 at 15:02
you dont 'wait' in the UI thread. read up on 'observer' pattern.. https://en.wikipedia.org/wiki/Observer_pattern#Example ... The UI thread is one of the 'observers' that is notified onAsyncopCompletion... This happens via a 'callback' which you can code in a variety of ways in android... ( asyncTask, Handlers ) — Robert Rowntree, Jan 09 '16 at 15:19
Please read about how thread work in Java and specially in Android — Kshitij Aggarwal, Jan 09 '16 at 16:13

score 0 · Answer 1 · answered Jan 09 '16 at 15:05

public void buttonListener (View view) {
        if (view.getId() == R.id.button) {
            //start loading...

            AsyncHttpClient client = new AsyncHttpClient();
            Dialog dialog = new Dialog(MainActivity.this);
            dialog.setTitle("");
            // show a dialog that can't be close by user.
            final ProgressDialog progressDialog = new ProgressDialog(view.getContext());
            progressDialog.setIndeterminate(true);
            progressDialog.setCancelable(false);
            progressDialog.setCanceledOnTouchOutside(false);
            progressDialog.show();

            client.get("http://host.com/data.php", new AsyncHttpResponseHandler() {
                @Override
                public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                    //loading succeeded
                    //close the dialog
                    //now I can parse the byte[] responseBody to a JSONObject...
                    progressDialog.dismiss();
                }

                @Override
                public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
                    //loading failed
                    //close the dialog
                    progressDialog.dismiss();
                }
            });

            //I want my program to stop at this point until onSuccess() or onFailure() is called
        }
    }

THX, I already got a solution, in the end the dialog is part of my solution because the user can't do anything until the HttpClient gets a response so it works — sith, Jan 11 '16 at 12:56

stop UI thread until http responses

1 Answers1