Android调用地图的几种方式

自动判断系统装了哪些地图客户端（百度 google 高德 等）然后显示,主要代码如下

JSONObject jo = getLocationInfo(address.getText().toString());
                GeoPoint gp = getGeoPoint(jo);
                Uri uri= Uri.parse("geo:" + gp.getLatitudeE6() / 1E6 + ","
                        + gp.getLongitudeE6() / 1E6 + "?q=" + address.getText());
                Intent intent = new Intent(Intent.ACTION_VIEW,uri);
　　　　　　　　  startActivity(intent);

通过浏览器调用百度地图

uri=Uri.parse("http://api.map.baidu.com/geocoder?address="+address.getText()+"&output=html";

Intent intent= new Intent(Intent.ACTION_VIEW, uri);

intent.setData(uri);

startActivity(intent);

调用百度地图客户端

JSONObject jo = getLocationInfo("" + address.getText());

GeoPoint gp = getGeoPoint(jo);

Intent intent = new Intent(Intent.ACTION_VIEW);

Uri uri = Uri.parse("geo:" + gp.getLatitudeE6() / 1E6 + ","

+ gp.getLongitudeE6() / 1E6 + ","

+ address.getText());

intent.setData(uri);

intent.setPackage("com.baidu.BaiduMap");

startActivity(intent);