Question

I am calling a webservice through asynctask, to call the webservice i am calling one method named makeRequest() in doInBackground(), I am getting the response in another methods success(), In success method i am updating the listview

But i am getting error like

android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views."

Here Im adding my code.Im calling synctask from activity

new MyTask(this,urlAsString,sp).execute(); 

here is the Asynctask class

class MyTask extends AsyncTask<Void, Void, Void> {
        ProgressDialog progress;

        String url;
        SharedPreferences sp;
        HomepageH2desk c;
          public MyTask(HomepageH2desk context,String url,SharedPreferences sp) {
            this.c = context;
            this.url = url;
            this.sp = sp;
            progress = new ProgressDialog(this.c);
            progress.setMessage("Loading...");
          }

          public void onPreExecute() {
            progress.show();
          }

          public Void doInBackground(Void... unused) {
             c.getTickets(url,sp);
            return null;
            //progress.setMessage("Loading...");
          }

          public void onPostExecute(Void unused) {
            progress.dismiss();
          }
        }

Here im getting webservice response

 public void success(Object result) {

     list = (ArrayList<Map<String, String>>) result;

    this.adapter.setList(list);
            this.adapter.notifyDataSetChanged();
}

listview is not getting updated and showing error

android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

Help me to solve this problem…

Answer 1

You should update your List like this.

Activity_name.this.runOnUiThread(new Runnable() {

@Override
public void run() {
      list = (ArrayList<Map<String, String>>) result;
      this.adapter.setList(list);
      this.adapter.notifyDataSetChanged();
    }
});