Android에서 키보드 사라지게 하기

다음처럼부르면 됨

DDUtil.setupUI(MainActivity.this, findViewById(R.id.parent));


다음처럼 간단히

public class DDUtil {
    public static void setupUI(final Activity activity, View view) {
        //Set up touch listener for non-text box views to hide keyboard.
        if(!(view instanceof EditText)) {
            view.setOnTouchListener(new View.OnTouchListener() {
                public boolean onTouch(View v, MotionEvent event) {
                    hideSoftKeyboard(activity);//MainActivity.this
                    return false;
                }
            });
        }
        //If a layout container, iterate over children and seed recursion.
        if (view instanceof ViewGroup) {
            for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
                View innerView = ((ViewGroup) view).getChildAt(i);
                setupUI(activity, innerView);
            }
        }
    }
    public static void hideSoftKeyboard(Activity activity)
    {
        InputMethodManager inputMethodManager = (InputMethodManager)  activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
        inputMethodManager.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
    }
}

참고 :
http://stackoverflow.com/questions/4165414/how-to-hide-soft-keyboard-on-android-after-clicking-outside-edittext