点击键盘外，让软键盘消失

这个操作还是很有必要滴，，笔记也是得做滴

@Override
public boolean onTouchEvent(MotionEvent event) {
    InputMethodManager manager = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
    // TODO Auto-generated method stub
    if(event.getAction() == MotionEvent.ACTION_DOWN){
        if(getCurrentFocus()!=null && getCurrentFocus().getWindowToken()!=null){
            manager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }
    return super.onTouchEvent(event);
}