“A JSONArray text must start with '[' at character 1 of null”

问题:

Just wondering what that error could mean? I get it from the following code..

 try{     JSONArray jArray = new JSONArray(result);     for(int i=0;i<jArray.length();i++){             JSONObject json_data = jArray.getJSONObject(i);             Log.i("log_tag","id: "+json_data.getInt("id")+                     ", name: "+json_data.getString("name")+                     ", sex: "+json_data.getInt("sex")+                     ", birthyear: "+json_data.getInt("birthyear")             );     } } }catch(JSONException e){     Log.e("log_tag", "Error parsing data "+e.toString()); } 

回答1:

Result is null, apparently. Or it simply does not start with [. Print it out before calling JSONArray to see.

Also take a look at the JSONArray source. It is expecting JavaScript array syntax, e.g.:

['this', 'is', 'array', 'syntax']

回答2:

text.trim(); text.trim();

Text is the json file or string , do this at least two times one after another will resolve the problem 99.9%.

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