Android: Accessing UI Element from timer thread

Question

public Button stb;
static int cnt=0;
public ArrayList Butgrp1 = new ArrayList();
Timer myt; 
TimerTask t;
stb.setOnClickListene         


        

Answer 1

You don't need to call runOnUIThread inside the handler. By calling post on the Handler instance, the runnable you pass will be executed on the UI thread at some point in the future. Change your code to look like this and it should work:

 Handler h=new Handler();

    h.post(new Runnable() {

        public void run() {

                    // TODO Auto-generated method stub
                    Butgrp1.get(cnt).setChecked(true);
                    cnt=cnt+1;
                    if(cnt>4)
                        cnt=0;
                    if(cnt>0)
                    //  Butgrp1.get(cnt-1).setChecked(false);
                    System.out.println(cnt);
                }
            });