我正在尝试使用Volley来使用Web服务。这是我的logcat输出:
12-14 10:45:41.750:I / Annuaire2error(4005):org.json.JSONException:Value [{“label”:[{“pers_nom”:“yen”,“pers_id”:“1”, “pers_prenom”: “分级表”, “pers_email”: “yen98.ines@gmail.com”, “pers_phone”: “443456784”},{ “pers_nom”: “悯”, “pers_id”: “2”,“pers_prenom “:”Derkok“,”pers_email“:”jamin.drk23 @ gmail.com“,”pers_phone“:”2345512398“}]}]类型org.json.JSONArray无法转换为JSONObject
它似乎无法访问我的网络服务label
的值。如何从JSONArray
转换为JSONObject
?
这是我的代码:
mRequestQueue = Volley.newRequestQueue(getActivity().getApplicationContext());
JsonObjectRequest jr = new JsonObjectRequest(Request.Method.GET,url,null,new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.i(TAG,response.toString());
try{
JSONObject value = response.getJSONObject("label");
String essai = value.getString("pers_nom");
/**
* just for check
* */
Toast.makeText(getActivity(), ""+essai, Toast.LENGTH_SHORT).show();
Log.d("volley output", essai);
} catch(Exception e) {
e.printStackTrace();
}
}
},new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), "errrrroooor", Toast.LENGTH_LONG).show();
Log.i(TAG+"error",error.getMessage());
}
});
mRequestQueue.add(jr);
答案 0 :(得分:4)
您获得的响应是JSONArray而不是JSONObject
public void onResponse(JSONObject response)// resposne should be JSONArray
// Change it to JSONArray
此
JSONObject value = response.getJSONObject("label"); // wrong
// label is a json array
你的json
[ // json array node
{ // json object node
"label": [ // json array label
{
"pers_nom": "yen",
"pers_id": "1",
"pers_prenom": "ines",
"pers_email": "yen98.ines@gmail.com",
"pers_phone": "443456784"
},
{
"pers_nom": "Jamin",
"pers_id": "2",
"pers_prenom": " Derkok",
"pers_email": "jamin.drk23@gmail.com",
"pers_phone": "2345512398"
}
]
}
]
应该像
@Override
public void onResponse(JSONArray response) {
Log.i(TAG,response.toString());
try{
JSONObject value = response.getJSONObject(0);
JSONArray jr = value.getJSONArray("label");
for(int i=0;i<jr.length();i++)
{
JSONObject jb = (JSONObject) jr.get(i);
String pers_nom = jb.getString("pers_nom");
Log.i(".........",pers_nom);
...// similarly for id and so on..
}
...// rest of the code
编辑:
Response.Listener<JSONArray> listener = new Response.Listener<JSONArray>()
{
@Override
public void onResponse(JSONArray response) {
// TODO Auto-generated method stub
}
};
Response.ErrorListener errorListener = new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
}
};
并使用
JsonArrayRequest jr =new JsonArrayRequest(Request.Method.GET,url, listener, errorListener) ;
编辑2:
我查看来源,看起来如下
public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
super(Method.GET, url, null, listener, errorListener);
}