我正在开发一个关于android中最近的地方的应用程序。但我不知道如何计算距离以及如何在列表视图中按升序排序。我该怎么用?
答案 0 :(得分:1)
我使用Volley的Foursquare服务
做了这样的例子该项目最重要的部分是:
private void getPlaces(){
String apiCall = "https://api.foursquare.com/v2/venues/search?client_id="+CLIENT_ID+"&client_secret="+CLIENT_SECRET+"&v=20130815%20&ll="+latitude+","+longtitude;
JsonObjectRequest Request = new JsonObjectRequest(com.android.volley.Request.Method.GET,
apiCall,
(String) null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("Respuesta", response.toString());
//Parseamos la frase
venuesList = (ArrayList<FoursquareVenue>) parseFoursquare(response);
List<String> listTitle = new ArrayList<String>();
for (int i = 0; i < venuesList.size(); i++) {
listTitle.add(i, venuesList.get(i).getName() + ", " + venuesList.get(i).getCategory() + "" + venuesList.get(i).getCity());
}
// set the results to the list
// and show them in the xml
myAdapter = new ArrayAdapter<String>(MainActivity.this, R.layout.row_layout, R.id.listText, listTitle);
setListAdapter(myAdapter);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("Respuesta", "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
"Error: "+ error.getMessage(),
Toast.LENGTH_SHORT).show();
}
});
//Añadimos la solicitud a la cola de solicitudes
AppController.getInstance().addToRequestQueue(Request);
}
以下是整个project