Starting a runnable in background thread
custListLoadThread = new Thread(loadRunnable);custListLoadThread.start();You need to start the thread, not call the run() method in the current thread.
If you want to execute code on a background thread that does not do something with the UI:
Runnable runnable = new Runnable() { @Override public void run() { //your action } }; AsyncTask.execute(runnable);Of course as written before you can also create a new thread (that is independent from the UI thread):
new Thread(runnable).start();In your example you want to update UI elements, so better use a AsyncTask (must be called from UI thread!):
new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(Void... params) { // your async action return null; } @Override protected void onPostExecute(Void aVoid) { // update the UI (this is executed on UI thread) super.onPostExecute(aVoid); } }.execute();