在自定義類中

  @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (!isFocused()) {
            if (messageViewListener!=null){
                messageViewListener.onHiderBottomBar();
            }
            // 隱藏鍵盤
            IBinder token = sendContainer.getWindowToken();
            InputMethodManager inputMethodManager = (InputMethodManager) getContext()
                    .getSystemService(Context.INPUT_METHOD_SERVICE);
            inputMethodManager.hideSoftInputFromWindow(token,
                    InputMethodManager.HIDE_NOT_ALWAYS);
        }
        return super.onTouchEvent(event);
    }