解析数据时出错org.json.jsonexception：value .... java.lang.string类型的＃（mystring）无法转换为jsonarray [英] Error parsing data org.json.jsonexception: value ....#(mystring) of type java.lang.string cannot be converted to jsonarray
问题描述
我想在android listView中显示我的json字符串但发现错误
注意：我正在使用WCF服务将我的数据转换为json格式。
解析数据时出错org.json.JSONException：Value [{Id：1，Name：Umair，SSN：11111111}，{Id：2，名称：khan，SSN：2222222}]在java.lang.String类型的JSONDataResult中无法转换为JSONArray
我的Json字符串。 ..
{JSONDataResult：[{\Id\：1，\Name \：\Umair \，\SSN \ ：\ 11111111\ }，{\ Id\ ：2，\ Name\ ：\ khan\ \ SSN\：\ 2222222 \}}}
我的Android编码：..
protected void showList（）{
试试{
// myJSON = myJSON.replace（\， '）;
JSONObject jsonObj =新的JSONObject（myJSON）;
JArray = jsonObj.getJS ONArray（TAG_Obj）;
for（int i = 0; i< jarray mode =hold> JSONObject c = JArray.getJSONObject（i）;
id = c.getString（TAG_ID）;
name = c.getString（TAG_Name）;
ssn = c.getString（TAG_SSN）;
HashMap< string，string> Hashmappersons = new HashMap< string，string>（）;
Hashmappersons.put（TAG_ID，id）;
Hashmappersons.put（TAG_Name ，名称）;
Hashmappersons.put（TAG_SSN，ssn）;
ArraypersonList.add（Hashmappersons）;
$ / b $ b $
ListAdapter listadapter = new SimpleAdapter（
MainActivity.this，ArraypersonList，
R.layout.list_item，
new String [] {TAG_ID，TAG_Name，TAG_SSN}，
new int [] {R.id.tv_id，R.id.tv_Name，R.id.tv_SSN}
）;
listv.setAdapter（listadapter）;
}
catch（JSONException e）{
e.printStackTrace（）;
Log.v（+ e，错误+ e）;
Log.e（log_tag，解析数据时出错+ e.toString（））;
Log.e（ log_tag，失败的数据是：\ n+ listv）;
// tv_Er.setText（错误：+ e）;
Toast.makeText（getApplicationContext（），+ e +，Toast.LENGTH_SHORT）。show（）;
}
}
public void getData（）{
class GetDataJSON扩展了AsyncTask< string，> {
@Override
protected String doInBackground（String ... params）{
DefaultHttpClient httpclient = new DefaultHttpClient（new BasicHttpParams（））;
// HttpPost httppost = new HttpPost（url）;
//取决于您的网络服务
// httppost.setHeader（接受，application / json）;
/ / httppost.setHeader（Content-type，application / json）;
HttpGet httpget = new HttpGet（url）;
httpget.setHeader（Accept，application / json）;
httpget.setHeader（Content-type，application / json）;
// DefaultHttpClient httpClient = new DefaultHttpClient（）;
InputStream inputStream = null;
Strin g result = null;
try {
// HttpResponse response = httpclient.execute（httppost）;
HttpResponse response = httpclient.execute（ http：）
HttpEntity entity = response.getEntity（）;
inputStream = entity.getContent（）;
// HttpResponse response = httpClient.execute（request）;
// HttpEntity responseEntity = response.getEntity（）;
/ / inputStream = responseEntity.getContent（）;
// json默认为UTF-8
BufferedReader reader = new BufferedReader（new InputStreamReader（inputStream，UTF-8），8）;
// BufferedReader reader = new BufferedReader（new InputStreamReader（inputStream， HTTP.UTF_8），8）;
StringBuilder sb = new StringBuilder（）;
String line = null;
while（（line = reader.readLine（）） ！= null）
{
sb.append（line +\ n）;
}
result = sb.toString（）;
} catch（例外e）{
//哎呀
}
最后{
尝试{
if（inputStream！= null）inputStream.close（）;
}
catch（异常挤压）
{
}
}
返回结果;
}
@Override
protected void onPostExecute（String result）{
myJSON = result;
showList（）;
}
}
GetDataJSON g = new GetDataJSON（）;
g.execute（）;
}
我尝试了什么：
i我试图在android listView中显示我的json字符串，但总是发现错误
类型java.lang.String的值无法转换为JSONArray。
在您的Json字符串中，删除双引号，字符串将为关注
{JSONDataResult：[{\Id\：1，\Name \：\ Umair\，\ SSN\：\ 11111111\}，{\ Id\：2，\ Name\：\ khan\， \ SSN\：\ 2222222\}]}
i am trying to show my json string in android listView but Found an Error
Note: i am Using WCF services For converting my data to json format.
Error parsing data org.json.JSONException: Value [{"Id":1,"Name":"Umair","SSN":"11111111"},{"Id":2,"Name":"khan","SSN":"2222222"}] at JSONDataResult of type java.lang.String cannot be converted to JSONArray
My Json String ...
{"JSONDataResult":"[{\"Id\":1,\"Name\":\"Umair\",\"SSN\":\"11111111\"},{\"Id\":2,\"Name\":\"khan\",\"SSN\":\"2222222\"}]"}
My Android Coding :..
protected void showList(){
try {
// myJSON = myJSON.replace("\"","'");
JSONObject jsonObj = new JSONObject(myJSON);
JArray = jsonObj.getJSONArray(TAG_Obj);
for(int i=0;i<jarray mode="hold"> JSONObject c = JArray.getJSONObject(i);
id = c.getString(TAG_ID);
name = c.getString(TAG_Name);
ssn = c.getString(TAG_SSN);
HashMap<string,string> Hashmappersons = new HashMap<string,string>();
Hashmappersons.put(TAG_ID,id);
Hashmappersons.put(TAG_Name,name);
Hashmappersons.put(TAG_SSN,ssn);
ArraypersonList.add(Hashmappersons);
}
ListAdapter listadapter = new SimpleAdapter(
MainActivity.this, ArraypersonList,
R.layout.list_item,
new String[]{TAG_ID,TAG_Name,TAG_SSN},
new int[]{R.id.tv_id, R.id.tv_Name,R.id.tv_SSN}
);
listv.setAdapter(listadapter);
}
catch (JSONException e) {
e.printStackTrace();
Log.v("" + e, "Error" + e);
Log.e("log_tag", "Error parsing data "+e.toString());
Log.e("log_tag", "Failed data was:\n" +listv);
// tv_Er.setText("Error: " + e);
Toast.makeText(getApplicationContext(),""+e+"",Toast.LENGTH_SHORT).show();
}
}
public void getData(){
class GetDataJSON extends AsyncTask<string,> {
@Override
protected String doInBackground(String... params) {
DefaultHttpClient httpclient = new DefaultHttpClient(new BasicHttpParams());
// HttpPost httppost = new HttpPost(url);
// Depends on your web service
// httppost.setHeader("Accept", "application/json");
// httppost.setHeader("Content-type", "application/json");
HttpGet httpget = new HttpGet(url);
httpget.setHeader("Accept", "application/json");
httpget.setHeader("Content-type", "application/json");
// DefaultHttpClient httpClient = new DefaultHttpClient();
InputStream inputStream = null;
String result = null;
try {
// HttpResponse response = httpclient.execute(httppost);
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
inputStream = entity.getContent();
// HttpResponse response = httpClient.execute(request);
// HttpEntity responseEntity = response.getEntity();
// inputStream = responseEntity.getContent();
// json is UTF-8 by default
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
// BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, HTTP.UTF_8), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
} catch (Exception e) {
// Oops
}
finally {
try{
if(inputStream != null)inputStream.close();
}
catch(Exception squish)
{
}
}
return result;
}
@Override
protected void onPostExecute(String result){
myJSON=result;
showList();
}
}
GetDataJSON g = new GetDataJSON();
g.execute();
}
What I have tried:
i am trying to show my json string in android listView but always Found an Error
value of type java.lang.String cannot be converted to JSONArray .
In your Json String, Remove the double quotes and the string would be as follows
{"JSONDataResult":[{\"Id\":1,\"Name\":\"Umair\",\"SSN\":\"11111111\"},{\"Id\":2,\"Name\":\"khan\",\"SSN\":\"2222222\"}]}
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