Meu primeiro contato com threads

note

final Handler handler = new Handler(){
                    @Override
                    public void handleMessage(Message msg) {
                        switch(msg.what){
                            case 0:
                                nextActivity();
                                progress.dismiss();
                        }
                        super.handleMessage(msg);
                    }
                };

                Thread threadExecute = new Thread(){

                    public void run(){
                        try {
                            executePost();
                            Thread.sleep(1000);
                        }
                        catch (Exception e) {
                            e.printStackTrace();
                        }
                        handler.sendEmptyMessage(0);
                    }
                };
                threadExecute.start();