EditText edittext = (EditText)findViewById(R.id.edittext);  

edittext.setFocusable(true);  

edittext.setFocusableInTouchMode(true);  

edittext.requestFocus();  

Timer timer = new Timer();  

timer.schedule(new TimerTask() {  

                   public void run() {  

                       InputMethodManager inputManager =  

                               (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);  

                       inputManager.showSoftInput(edittext, 0);  

                   }  

               },  

        200);