百度地图手机四角坐标

var mp = new BMap.Map('map');
mp.centerAndZoom(new BMap.Point(121.491, 31.233), 17);
...
左下角坐标(mp.getBounds().getSouthWest().lng, mp.getBounds().getSouthWest().lat)
右下角坐标(mp.getNorthEast().getNorthEast().lng, mp.getBounds().getNorthEast().lat)
中心坐标(mp.getCenter().lng, mp.getCenter().lat)

Adndroid



true]GeoPoint centerPoint =mapview.getMapCenter();
//地图中心坐标 int tbSpan = mapview.getLatitudeSpan();
//当前纬线的跨度（从地图的上边缘到下边缘） 
int lrSpan =mapview.getLongitudeSpan();
//当前经度的跨度(从地图的左边缘到地图的右边缘) 
GeoPoint ltPoint = new GeoPoint(centerPoint.getLatitudeE6() - tbSpan / 2, centerPoint.getLongitudeE6() - lrSpan / 2);
//左上角坐标 
GeoPoint rbPoint = new GeoPoint(centerPoint.getLatitudeE6() + tbSpan / 2, centerPoint.getLongitudeE6() + lrSpan / 2);
//右下角坐标