I want to get data from php file to Android using JSON. This is my code:
....
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(0);
return last;
When I debug the program there is JSONException on this line:
JSONObject last = timeline.getJSONObject(0);
data = {"a":1,"b":2,"c":3,"d":4,"e":5}
and the Exception is: "org.json.JSONException: Value {"d":4,"e":5,"b":2,"c":3,"a":1} of type org.json.JSONObject cannot be converted to JSONArray"
In Json object are described using [].
ReplyDeleteThere you define an object with five attributes.
data = {"a":1,"b":2,"c":3,"d":4,"e":5}
ReplyDeleteis already json array not json object.
that's whay one by one get json array element.
The exception message is quite explicit and a look at the JSON syntax diagrams should be illustrative. The JSON string that your code received is:
ReplyDelete{"a":1,"b":2,"c":3,"d":4,"e":5}
This string represents an object, not an array. An example of an array would be this:
[1, 2, 3, 4, 5]
or even this:
[{"a":1,"b":2,"c":3,"d":4,"e":5}]
Note that starting and closing brackets.
I think that you will find that the exception location is slightly misleading. I don't know if it is a result of some sort of lazy initialization or something else, but I believe that the cause is actually this line:
JSONArray timeline = new JSONArray(data);
Since the data string represents a JSON object and not an array, this operation is clearly impossible.