我有一个JSONParser，它解析为从原始资源文件夹中提取的字符串。当它在一个活动中时，它工作得非常好。由于我需要在其他活动中重用它，我将它移动到它自己的类中。
我无法弄清楚为什么或我现在错了。它几乎不变......？ 请看看我的方法，看看你的想法。日Thnx
片段活动：
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
InputStream file = getResources().openRawResource(R.raw.regulatory_list);
JSONParser jParser = new JSONParser();
JSONArray json = jParser.getJSONFromFile(file);
callback(jParser);
}
The Parser Class：
public class JSONParser {
static JSONArray jArray = null;
// constructor
public JSONParser() {
}
public JSONArray getJSONFromFile(InputStream file) {
Writer writer = new StringWriter();
char[] buffer = new char[1024];
try {
Reader reader = new BufferedReader(new InputStreamReader(file, "UTF-8"));
int n;
while ((n = reader.read(buffer)) != -1) {
writer.write(buffer, 0, n);
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
file.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
String jsonString = writer.toString();
// try parse the string to a JSON object
try {
jArray = new JSONArray(jsonString);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jArray;
}
}
从JSONException到Log的错误：
06-08 16:04:21.504: E/JSON Parser(27082): Error parsing data org.json.JSONException: Value [{"title":"Advisory Circulators","label":"AC","date":"2008-03-03","_id":"1","gotoURL":null,"description":"Provides guidance such as methods, procedures, and practices for complying with regulations and requirements."},{"title":"Airworthiness Directives","label":"AD","date":"2012-06-08","_id":"2","gotoURL":"javascript:navClickListener('bodyContent', dns + '\/wiki\/index.php\/Airworthiness_Directive #content');","description":"Legally enforceable rules that apply to aircraft, aircraft engines, propellers, and appliances."},{"title":"Code of Federal Regulations","label":"CFR","date":"2012-01-31","_id":"3","gotoURL":"javascript:navClickListener('bodyContent', dns + '\/wiki\/index.php\/Main_Page #content');","description":"Official Rulemaking documents of the CFR in Title 14 and have been published in the Federal Register"},{"title":"Parts Manufacturer Approvals","label":"PMA","date":"2012-01-31","_id":"4","gotoURL":null,"description":"Parts Manufacturer Approvals"},{"title":"Special Airworthiness Info Bulletins","label":"SAIB","date":"2012-01-31","_id":"5","gotoURL":null,"description":"Bulletins issued by manufacturers to provide modification or inspection instructions."},{"title":"Special Federal Aviation Regulation","label":"SFAR","date":"2012-01-31","_id":"6","gotoURL":null,"description":"Official Rulemaking documents that have changed the language of the CFR in Title 14 CFR for aviation."},{"title":"Supplemental Type Certificates","label":"STC","date":"2012-01-31","_id":"7","gotoURL":null,"description":"Document issued by the Federal Aviation Administration approving a product (aircraft, engine, or propeller) modification"},{"title":"Technical Standard Orders","label":"TSO","date":"2012-01-31","_id":"8","gotoURL":null,"description":"Minimum performance standards issued by the FAA for specified materials, parts, processes, and appliances used on civil aircraft."},{"title":"Type Certificate Data Sheets","label":"TCDS","date":"2012-01-31","_id":"9","gotoURL":null,"description":"Repository of Make and Model information of aircraft, engine or propeller including airspeed, weight, and thrust limitations, etc."}] of type org.json.JSONArray cannot be converted to JSONObject
编辑后记录：
06-08 16:44:42.744: E/JSON Parser(27515): Error parsing data org.json.JSONException: Value [{"title":"Advisory Circulators","label":"AC","date":"2008-03-03","_id":"1","gotoURL":null,"description":"Provides guidance such as methods, procedures, and practices for complying with regulations and requirements."},{"title":"Airworthiness Directives","label":"AD","date":"2012-06-08","_id":"2","gotoURL":"javascript:navClickListener('bodyContent', dns + '\/wiki\/index.php\/Airworthiness_Directive #content');","description":"Legally enforceable rules that apply to aircraft, aircraft engines, propellers, and appliances."},{"title":"Code of Federal Regulations","label":"CFR","date":"2012-01-31","_id":"3","gotoURL":"javascript:navClickListener('bodyContent', dns + '\/wiki\/index.php\/Main_Page #content');","description":"Official Rulemaking documents of the CFR in Title 14 and have been published in the Federal Register"},{"title":"Parts Manufacturer Approvals","label":"PMA","date":"2012-01-31","_id":"4","gotoURL":null,"description":"Parts Manufacturer Approvals"},{"title":"Special Airworthiness Info Bulletins","label":"SAIB","date":"2012-01-31","_id":"5","gotoURL":null,"description":"Bulletins issued by manufacturers to provide modification or inspection instructions."},{"title":"Special Federal Aviation Regulation","label":"SFAR","date":"2012-01-31","_id":"6","gotoURL":null,"description":"Official Rulemaking documents that have changed the language of the CFR in Title 14 CFR for aviation."},{"title":"Supplemental Type Certificates","label":"STC","date":"2012-01-31","_id":"7","gotoURL":null,"description":"Document issued by the Federal Aviation Administration approving a product (aircraft, engine, or propeller) modification"},{"title":"Technical Standard Orders","label":"TSO","date":"2012-01-31","_id":"8","gotoURL":null,"description":"Minimum performance standards issued by the FAA for specified materials, parts, processes, and appliances used on civil aircraft."},{"title":"Type Certificate Data Sheets","label":"TCDS","date":"2012-01-31","_id":"9","gotoURL":null,"description":"Repository of Make and Model information of aircraft, engine or propeller including airspeed, weight, and thrust limitations, etc."}] of type org.json.JSONArray cannot be converted to JSONObject
有效的原始课程：
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
InputStream is = getResources().openRawResource(R.raw.regulatory_list);
Writer writer = new StringWriter();
char[] buffer = new char[1024];
try {
Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
int n;
while ((n = reader.read(buffer)) != -1) {
writer.write(buffer, 0, n);
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
String jsonString = writer.toString();
callback(jsonString);
}
答案 0 :(得分：1)
从日志中显示你的JSON是一个数组，即它看起来像这样：
["foo":bar]
如果它是一个对象，它将如下所示：
{"foo":bar}
你要做的第一件事是：
new JSONObject(jsonString);
但它是一个阵列！所以你需要创建一个数组：
new JSONArray(jsonString);
然后，您可以通过循环遍历数组来获取对象。
答案 1 :(得分：1)
您的异常表明您正在尝试从JSONArray的数据加载JSONObject。
这个page包含一些有用的（简明！）有关JSON数据格式的信息，这些信息将指导您使用JSON库。