我正在尝试向服务器发送请求并从服务器获取响应，但是当我运行我的应用程序时它崩溃并显示json数组无法转换为json对象..以下是我的代码和Web服务..
回应：
[
{
"id":"15","name":"",
"contact":"",
"email":"",
"comp_name":"Tailor",
"upload_dir":""
},
{
"id":"16","name":"",
"contact":"",
"email":"",
"comp_name":"Trailor",
"upload_dir":""
},
]
MainActivity.java
JSONParser jsonParser = new JSONParser();
JSONObject json;
JSONArray searchresult=null;
class searchs extends AsyncTask<String, String, String> {
boolean failure = false;
JSONObject jobj;
String resultname;
String match_Detail_id;
String Names;
String Ages;
String Locations;
String Images;
String Casts;
String Profiles;
private ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Processing..");
pDialog.setIndeterminate(true);
// pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress));
pDialog.setCancelable(true);
pDialog.show();
}
@SuppressWarnings("unused")
@Override
protected String doInBackground(String...args) {
//Check for success tag
//int success;
Looper.prepare();
String language=splang.getText().toString();
String religion = sprelg.getText().toString();
String marriage=spmrgstatus.getText().toString();
String contri=spcountry.getText().toString();
String states=spstate.getText().toString();
String city=spcity.getText().toString();
System.out.println("Lang : " + language);
System.out.println("REligions : " + religion);
System.out.println("Maritals : " + marriage);
System.out.println("Countrys : " + contri);
System.out.println("States : " + states);
System.out.println("Citys : " + city);
try {
//Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("cat_id", language));
params.add(new BasicNameValuePair("subcat_id", religion));
params.add(new BasicNameValuePair("product", marriage));
params.add(new BasicNameValuePair("state", contri));
params.add(new BasicNameValuePair("city", states));
Log.d("request!", "starting");
// getting product details by making HTTP request
json = jsonParser.makeHttpRequest (
SEARCH_URL, "POST", params);
//check your log for json response
Log.d("Request attempt", json.toString());
//final String str = json.toString();
// jobj = new JSONObject(json.toString());
// final String msg = jobj.getString("searchresult");
searchresult = new JSONArray(json.toString());
for (int i = 0; i <searchresult.length(); i++) {
JSONObject c = searchresult.getJSONObject(i);
match_Detail_id = c.getString("id");
Log.d("Request attempt", match_Detail_id);
Names = c.getString("name");
Log.d("Request name", Names);
Profiles = c.getString("contact");
Log.d("Request profile", Profiles);
Images = c.getString("upload_dir");
Log.d("Request image", Images);
Casts = c.getString("email");
Log.d("Request cast", Casts);
Ages = c.getString("comp_name");
Log.d("Request age", Ages);
HashMap<String, String> hmp = new HashMap<String, String>();
hmp.put(TAG_AGE, Ages+" years");
hmp.put(TAG_CAST, Casts);
hmp.put(TAG_IMAGE, Images);
hmp.put(TAG_MATCH_ID, match_Detail_id);
hmp.put(TAG_NAME, Names);
hmp.put(TAG_PROFILE, Profiles);
alhmp.add(hmp);
//String age_fromc = c.getString("age_from");
}
/* runOnUiThread(new Runnable()
{
@Override
public void run()
{
Intent intent=new Intent(MainActivity.this,SearchResults.class);
intent.putExtra("match_data", alhmp);
//intent.putExtra("id", strtext);
intent.putExtra("prmatch_id", match_Detail_id);
startActivity(intent);
}
});*/
}catch (JSONException e) {
e.printStackTrace();
}
return null;
}
// After completing background task Dismiss the progress dialog
protected void onPostExecute(String file_url) {
//dismiss the dialog once product deleted
pDialog.dismiss();
alhmp.clear();
splang.setText("Select");
sprelg.setText("Select");
spmrgstatus.setText("Select");
spcountry.setText("Select Country");
spstate.setText("Select State");
spcity.setText("Select City");
/*if(searchresult == null || searchresult.length() == 0){
Intent inss=new Intent(MainActivity.this,SearchResults.class);
inss.putExtra("match_data", alhmp);
//inss.putExtra("id", strtext);
inss.putExtra("prmatch_id", match_Detail_id);
startActivity(inss);
}*/
}}
JSONParser
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
static JSONArray jsonarry=null;
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET method
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method.equals("POST")){
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} else if(method.equals("GET")) {
//request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
}catch (UnsupportedEncodingException e) {
e.printStackTrace();
}catch (ClientProtocolException e) {
e.printStackTrace ();
}catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
Log.d("Request attempt","JSON >>>" + json.toString());
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result" + e.toString());
}
// try parse the string to a JSON object
try { jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON PArser", "Error Parsing data" + e.toString());
}
return jObj;
}
答案 0 :(得分：1)
将jObj中的jObj = new JSONObject(json);更改为JSONArray。
你使用的jsonparser类总是以JSONObject的形式获得响应，你必须检查响应是JSONObject还是JSONArray然后转换它并将它返回给你的主类..
修改
你的答案JSONArray你知道吗？检查您的JSONParser类，您将获得响应json = sb.toString();。然后你将它转换为JSONObject，如jObj = new JSONObject(json);，所以它将显示错误。您必须将其设为JSONArray jArray = new JSONArray(json);，因为您的回复是JSONArray。
答案 1 :(得分：1)
修复你的Json字符串：
{ "record": [
{
"id":"15","name":"",
"contact":"",
"email":"",
"comp_name":"Tailor",
"upload_dir":""
},
{
"id":"16","name":"",
"contact":"",
"email":"",
"comp_name":"Trailor",
"upload_dir":""
}
]
}
使用this site检查您的结构。
答案 2 :(得分：1)
您可以尝试更改此行：
searchresult = new JSONArray(json.toString());
到这一行：
searchresult = json.getJSONArray(0);
但是你应该总是为JSON字符串添加一个键（如Trinimon建议的那样）并使用：
searchresult = json.getJSONArray(KEY_VALUE); // in Tinimon's example "record"
拥有你的JSON数组。