[Android]無法將ID編號超過32的衛星資訊通知回上層

感謝Danny網友詢問有關Android GPS的問題發現以下問題

Android GPS底層Driver在parse GPGSV

http://nelsonchunglife.blogspot.com/2010/12/gps-nmea-gpgsa-and-gpgsv.html

會需要將資訊填入GpsSvStatus

/** Represents SV status. */

typedef struct {

        /** Number of SVs currently visible. */

        int         num_svs;

        /** Contains an array of SV information. */

        GpsSvInfo   sv_list[GPS_MAX_SVS];

        /** Represents a bit mask indicating which SVs

         * have ephemeris data.

         */

        uint32_t    ephemeris_mask;

        /** Represents a bit mask indicating which SVs

         * have almanac data.

         */

        uint32_t    almanac_mask;

        /**

         * Represents a bit mask indicating which SVs

         * were used for computing the most recent position fix.

         */

        uint32_t    used_in_fix_mask;

} GpsSvStatus;

可是目前定義的長度只有32bit (uint32_t)

所以當你衛星ID超過32而且是fix的狀態

Android AP會無法得知

會造成某種程度定位資訊上的差異