/**     * 将实际地理距离转换为屏幕像素值     *      * @param distance     *            实际距离,单位为米     * @param currScale     *            当前地图尺寸     * @param context     * @return     */    public static double metreToScreenPixel(double distance, double currScale,            Context context) {        float dpi = context.getResources().getDisplayMetrics().densityDpi;        // 当前地图范围内1像素代表多少地图单位的实际距离        double resolution = (25.39999918 / dpi)                * currScale / 1000;        return distance / resolution;    }    /**     * 将屏幕上对应的像素距离转换为当前显示地图上的地理距离(米)     *      * @param pxlength     * @param currScale     * @param context     * @return     */    public static double screenPixelToMetre(double pxlength, double currScale,            Context context) {        float dpi = context.getResources().getDisplayMetrics().densityDpi;        double resolution = (25.39999918 / dpi)                * currScale / 1000;        return pxlength * resolution;    }