using runOnUiThread() inside thread to update User interface

Question

Can I use runOnUiThread() inside a thread to update the user interface while running the thread, or handler is more efficient ? .

Answer 1

Yes you can use runOnUiThread() from a non UI thread to update the UI. That method uses a handler internally if you are not currently on the UI thread so using your own handler will not be more efficient. If you are already on the UI thread then the runnable will be executed immediately.