JSON Array of strings (no objects), extracting data

问题

I have a long JSON string representing a string[] array being returned from a WCF service. The array elements are simply strings, they are not objects. This is an example of the return data

    ["1|ArrayElement1","2|ArrayElement2","3|ArrayElement3"..."n|ArrayElementn"]

I don't mind the index being included in the string, but I need to parse the strings into an ArrayList in Android so that I can adapt it to a ListView.

Since these technically aren't JSONObjects, how can I iterate over them and extract the string from each array element?

回答1:

this is a valid JSON array of strings, you can parse it normally like this

JSONArray jsonStrings = json.getJSONArray("items");
String strings[] = new String[jsonStrings.length()];
for(int i=0;i<strings.length;i++) {
strings[i] = jsonStrings.getString(i);
}

回答2:

Maybe this post can help you out:

JSON Array iteration in Android/Java

  HashMap<String, String> applicationSettings = new HashMap<String,String>();
    for(int i = 0; i < settings.length(); i++){
        String value = settings.getJSONObject(i).getString("value");
        String name = settings.getJSONObject(i).getString("name");
        applicationSettings.put(name, value);
    }

 JSONArray names= json.names();
    JSONArray values = json.toJSONArray(names);
    for(int i = 0 ; i < values.length(); i++){
        if(names.getString(i).equals("description")){
            setDescription(values.getString(i));
        }
        else if(names.getString(i).equals("expiryDate")){
            String dateString = values.getString(i);
            setExpiryDate(stringToDateHelper(dateString)); 
        }
        else if(names.getString(i).equals("id")){
            setId(values.getLong(i));
        }
        else if(names.getString(i).equals("offerCode")){
            setOfferCode(values.getString(i));
        }
        else if(names.getString(i).equals("startDate")){
            String dateString = values.getString(i);
            setStartDate(stringToDateHelper(dateString));
        }
        else if(names.getString(i).equals("title")){
            setTitle(values.getString(i));
        }
    }

回答3:

Just to clarify, as I understand it you are receiving a JSON array of strings which are strings of valid JSON prefixed with the array index and a pipe character?

First, I would suggest contacting the creator of this abomination and lecturing them on violating standards. If they won't listen, talk to their bosses. This kind of thing is unacceptable in my opinion and needs to stop.

Second, I'd suggest doing something like this:

string[] element_strings = JSON.deserialize(WCF_string_result);
object[] elements = new object[element_strings.length];
for(int x = 0; x < elements.length; x++)
{
    int pipeIndex = element_strings.indexOf("|");
    elements[x] = JSON.deserialize(element_strings[x].substr(pipeIndex + 1));
}

Of course this assumes you have some kind of method for deserializing strings of JSON objects. If you don't I'd recommend using the built in library available in Android:

http://developer.android.com/reference/org/json/package-summary.html

来源：https://stackoverflow.com/questions/10147851/json-array-of-strings-no-objects-extracting-data