Android Studio Baidu Map Development (6) Marker bind event, calculate two point distance

Android Studio Baidu Map Development (6) Marker bind event, calculate two point distance

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Development Environment : Win7 64-bit,android Studio, please note that Android Studio, using the Navigation SDK version: 3.1.0.

• Baidu Map Application (1): Android Studio Baidu Map Development (1) Configure project, show map
  

• Baidu Map Application (2):Android Studio Baidu Map Development (2) Map positioning

• Baidu Map Application (3): Android Studio Baidu Map Development (3) Map navigation

• Baidu Map Application (4): Android Studio Baidu Map Development (4) touch point, geocoding

• Baidu Map Application (5):Android Studio Baidu Map Development (5) Query peripheral services (petrol station)

One. Maker binding a point-and-click event

/**         * For Baidu map marker increased click Listener function *        /Baidumap.setonmarkerclicklistener (New Baidumap.onmarkerclicklistener () {            @Override public            boolean Onmarkerclick (Marker Marker) {           //response to click event                return false;            }        });

Two. Calculate the distance between two points according to Baidu map coordinates:

/**     * Calculates the distance between two points     * @param start     * @param end     * @return meters */public    String getdistance (latlng start , Latlng end) {        double lat1 = (math.pi/180) *start.latitude;        Double lat2 = (math.pi/180) *end.latitude;        Double lon1 = (math.pi/180) *start.longitude;        Double lon2 = (math.pi/180) *end.longitude;        Earth radius        Double R = 6371;        Two points away, if you want rice, the result *1000        double d =  Math.acos (Math.sin (LAT1) *math.sin (LAT2) +math.cos (LAT1) *math.cos ( LAT2) *math.cos (lon2-lon1)) *r;        if (d<1)            return (int) d*1000+ "M";        else            return String.Format ("%.2f", D) + "km";    }

Android Studio Baidu Map Development (6) Marker bind event, calculate two point distance