android json异常类型不匹配
我的应用程序在json上运行得非常好android json异常类型不匹配,android,json,Android,Json,我的应用程序在json上运行得非常好 { "id":"1", "title_en":"Civil War", "artist_en":"MOTORHEAD" } 但是当我尝试添加多首这样的歌曲时 { "song_list":[ {"id":"1", "title_en":"Civil War", "artist_en":"MOTORHEAD"}, {"id":"2", "title_en":"Slide It In", "artist_en":"
{
"id":"1",
"title_en":"Civil War",
"artist_en":"MOTORHEAD"
}
但是当我尝试添加多首这样的歌曲时
{
"song_list":[
{"id":"1",
"title_en":"Civil War",
"artist_en":"MOTORHEAD"},
{"id":"2",
"title_en":"Slide It In",
"artist_en":"WHITESNAKE"}]
}
即使在检索数据之前,它也会生成一个异常
09-08 07:29:53.998: W/System.err(982): org.json.JSONException: Value ? of type java.lang.String cannot be converted to JSONObject
09-08 07:29:53.998: W/System.err(982): at org.json.JSON.typeMismatch(JSON.java:107)
09-08 07:29:53.998: W/System.err(982): at org.json.JSONObject.<init>(JSONObject.java:158)
09-08 07:29:53.998: W/System.err(982): at org.json.JSONObject.<init>(JSONObject.java:171)
09-08 07:29:53.998: W/System.err(982): at com.dwaik.jsonparser.JSONParser.getJSONObject(JSONParser.java:46)
09-08 07:29:53.998: W/System.err(982): at com.dwaik.myapp.CustomizedListView.onCreate(CustomizedListView.java:48)
以及它的号召
final JSONObject jObject = (new JSONParser(this)).getJSONObject(getResources().openRawResource(R.raw.sample));
快速浏览一下,您试图将整个字符串转换为JsonObject,但是,它不是JsonObject,实际上是一个包含多个JsonObject的JsonArray 下面是一个小代码片段,用于指导您完成解析包含json数组的json字符串的类似过程:
public ArrayList<Ride> parse (String str) throws JSONException
{
ArrayList<Ride> rides = new ArrayList<Ride>();
try{
JSONArray ridesJsonArray = new JSONArray(str);
Ride ride;
for (int i=0;i<ridesJsonArray.length();i++)
{
ride = new Ride();
JSONObject o = ridesJsonArray.optJSONObject(i);
ride.rideId=o.optInt("id");
ride.fullName=o.optString("fullname");
ride.origin=o.optString("origin");
ride.destination=o.optString("destination");
ride.date=o.optString("date");
ride.time=o.optString("time");
ride.phone=o.optString("phone");
ride.email=o.optString("email");
ride.comments=o.optString("comments");
//log message to make sure the rides are coming from the server
Log.i("Rides", ride.fullName + " | ");
rides.add(ride);
}
return rides;
}
catch (Exception e) {
e.printStackTrace();
return null;
}
}
public ArrayList parse(String str)抛出JSONException
{
ArrayList rides=新建ArrayList();
试试{
JSONArray=新JSONArray(str);
骑乘;
对于(inti=0;idoesnt),这里的JSON根元素表示一个对象,并在其中包含一个数组?对不起,我是新手JSON@Warlock{
表示json对象节点。[
表示一个json数组节点。您得到的是一个字符串而不是json对象。因此出现了错误。请检查您发送的json数据。我使用json验证程序发现了问题,有一些“و”而不是“,”…键盘语言开关:)
public ArrayList<Ride> parse (String str) throws JSONException
{
ArrayList<Ride> rides = new ArrayList<Ride>();
try{
JSONArray ridesJsonArray = new JSONArray(str);
Ride ride;
for (int i=0;i<ridesJsonArray.length();i++)
{
ride = new Ride();
JSONObject o = ridesJsonArray.optJSONObject(i);
ride.rideId=o.optInt("id");
ride.fullName=o.optString("fullname");
ride.origin=o.optString("origin");
ride.destination=o.optString("destination");
ride.date=o.optString("date");
ride.time=o.optString("time");
ride.phone=o.optString("phone");
ride.email=o.optString("email");
ride.comments=o.optString("comments");
//log message to make sure the rides are coming from the server
Log.i("Rides", ride.fullName + " | ");
rides.add(ride);
}
return rides;
}
catch (Exception e) {
e.printStackTrace();
return null;
}
}