獲得螢幕的寬高.

    /**
     * 獲得螢幕的寬高.
     *
     * @return the sreen width height
     */
    public void getSreenWidthHeight() {
/*
        DisplayMetrics dm = new DisplayMetrics();
        getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);

        m_density = dm.density;
        mWidth = dm.widthPixels;
        mHeight = dm.heightPixels;
        m_dpi = dm.densityDpi;
        */

    }