通過 Intent 啟動谷歌地圖 Google Maps App

        final String zoom = "12";
        final double lat = 22.278333; 
        final double lon = 114.158889;
        String startmaps = "geo:" + lat + "," + lon + "?z=" + zoom;
     
        Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(startmaps));
        startActivity(intent);