I am having issues with my attempt to connect via JSON to a PHP file to access MySQL in android. I cannot for the life of me figure out why this is causing my app to crash. Any ideas?
It is throwing the following error:
AndroidRuntime
FATAL EXCEPTION: main
I am attemping to call this from my main activity:
new getData().getMovie();
Which calls this:
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.*;
import org.json.*;
import android.util.Log;
import android.widget.Toast;
public class getData extends FullscreenActivity{
public void getMovie() {
String result = "";
String rID="1";
//the year data to send
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("ids",rID));
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://website.com/myphp.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
}catch(Exception e){
Toast.makeText(this, "Error in http connection "+e.toString(), Toast.LENGTH_LONG).show();
//Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
InputStream is = null;
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();
result=sb.toString();
}catch(Exception e){
Toast.makeText(this, "Error converting result "+e.toString(), Toast.LENGTH_LONG).show();
//Log.e("log_tag", "Error converting result "+e.toString());
}
//parse json data
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.getString("id")+
", 1: "+json_data.getString("1")+
", 2: "+json_data.getString("2")+
", 3: "+json_data.getString("3")+
", 4: "+json_data.getString("4")+
", 5: "+json_data.getString("5")
);
}
} catch (JSONException e) {
Toast.makeText(this, "Error parsing data "+e.toString(), Toast.LENGTH_LONG).show();
//Log.e("log_tag", "Error parsing data "+e.toString());
}
}
}
First, make sure your app requests the INTERNET permission. More on that here. Second, you can significantly declutter your code using the droidQuery library:
public void getMovie() {
$.ajax(new AjaxOptions().url("http://website.com/myphp.php")
.type("POST")
.dataType("JSON")
.data("{ids: 1}")
.context(this)
.success(new Function() {
#Override
public void invoke($ droidQuery, Object... params) {
JSONArray json = (JSONArray) params[0];
Object[] datas = $.makeArray(json);
for (Object data : datas) {
JSONObject obj = (JSONObject) data;
Map<String, ?> map = $.map(obj);
Log.i("log_tag", map.toString());//will print all JSON Objects in a Key-Value format, such as "{1, 'text'}"
}
}
})
.error(new Function() {
#Override
public void invoke($ droidQuery, Object... params) {
String reason = (String) params[2];
droidQuery.toast("Error in Ajax Request: " + reason, Toast.LENGTH_LONG);
}
}));
}
Thirdly, if you are still getting error, surround your call to getMovie() in a try-catch block, catching a Throwable instead of an Exception:
try {
new getData().getMovie();
}
catch (Throwable t) {
t.printStackTrace();
}
Related
I tried to parse some strings from this JSON-site:
I wrote this code with asynctask:
package com.example.nortti.jsonexample;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class MainActivity extends Activity {
TextView txView;
//URL to get JSON Array
private static String url = "http://localhost:10101/api/stats/1";
//JSON Node Names
private static final String TAG_USER = "";
private static final String TAG_NAME = "PersonName";
private static final String TAG_EMAIL = "Rank";
JSONArray user;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
user = null;
new JSONParse().execute();
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
txView = (TextView)findViewById(R.id.txView);
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array
user = json.getJSONArray("ArrayOfCommonStatViewModel");
Toast.makeText(getApplication(),user.toString(),Toast.LENGTH_SHORT).show();
JSONObject c = user.getJSONObject(0);
// Storing JSON item in a Variable
String name = c.getString(TAG_NAME);
String email = c.getString(TAG_EMAIL);
//Set JSON Data in TextView
txView.setText(name+" " +email);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
And I have another class like:
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpPost = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
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();
} 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 JSON String
return jObj;
}
}
But it says that I have a NullPointerException
I want to get a JSONArray to get information and put it into a ListView.
UPD: Here is JSON screenshot
UPD2: full log
12-17 14:17:03.712 20308-20308/com.example.nortti.politrange E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.nortti.politrange, PID: 20308
android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147)
at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:44)
at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:102)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:318)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:373)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:225)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:178)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
at com.example.nortti.politrange.utils.WebApiAdapter.select(WebApiAdapter.java:33)
at com.example.nortti.politrange.intefaces.impls.PersonCatalog.populateData(PersonCatalog.java:37)
at com.example.nortti.politrange.views.GeneralFragment.listData(GeneralFragment.java:65)
at com.example.nortti.politrange.views.GeneralFragment.onClick(GeneralFragment.java:88)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19761)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5253)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:900)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:695)
you are getting a NetworkOnMainThread exception because you are implementing a network operation in a UI thread so for loading the json data from your localhost you need to implement a seperate thread for it
You are getting NetworkOrMainThreadException.
Put below code on onCreate():
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
Hope this will help you.
You are trying to parse an XML document with a JSON Parser, it won't work. Let's take a look on this link , it will show you how to parse an XML document (in Android environment) on a proper way:
The content that you are trying to parse is actually xml not JSON. If you need to do network requests, parse the JSON, you can use Retrofit library. It is very simple and hassle-free. Here is a nice tutorial for the same. Hope it helps.
instead of developping the whole parsing code, try to use the Volley library of Google, it's an asynchrone library for parsing JSON.
here is a good tutorial.
enter code here
////In android studio add http client and http core libs/////
class mytask extends AsyncTask {
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
String url = "http://192.168.1.13/mywebservice/getbook.php";
json = getJSONFromUrl(url);
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Toast.makeText(ctx, json, Toast.LENGTH_LONG).show();
parser_01();
}
}
// from url to json object starts.......................................
public String getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
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");
sb.append(line);
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
return json;
}
// from url to json object Ends.......................................
public void parser_01() {
try {
String jstring = json;
JSONObject jobject = new JSONObject(jstring);
JSONArray bookarray = jobject.getJSONArray("data");
for (int i = 0; i < bookarray.length(); i++) {
String isdn = bookarray.getJSONObject(i).getString("isdn") + "";
String title = bookarray.getJSONObject(i).getString("title") + "";
String author = bookarray.getJSONObject(i).getString("author") + "";
String price = bookarray.getJSONObject(i).getString("price") + "";
}
} catch (Exception e) {
// TODO: handle exception
}
}
This is the URL which returns me the json object Link.
Now I need to get the json data to my code. When I try to access the link I get the html script. How do I get the json data from the above URL to my code. Here is my code.
class task extends AsyncTask<String, String, Void>
{
private ProgressDialog progressDialog = new
`ProgressDialog(MainActivity.this);`
InputStream is = null ;
String result = "";
protected void onPreExecute() {
progressDialog.setMessage("Fetching data...");
progressDialog.show();
progressDialog.setOnCancelListener(new OnCancelListener() {
#Override
public void onCancel(DialogInterface arg0) {
task.this.cancel(true);
}
});
}
#Override
protected Void doInBackground(String... params) {
String url_select1 = "http://andpermission.byethost5.com/PermissionList.php";
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url_select1);
ArrayList<NameValuePair> param = new ArrayList<NameValuePair>();
try {
httpPost.setEntity(new UrlEncodedFormEntity(param));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
//read content
is = httpEntity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection "+e.toString());
//Toast.makeText(MainActivity.this, "Please Try Again", Toast.LENGTH_LONG).show();
}
try {
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = "";
while((line=br.readLine())!=null)
{
sb.append(line+"\n");
}
is.close();
result=sb.toString();
} catch (Exception e) {
// TODO: handle exception
Log.e("log_tag", "Error converting result "+e.toString());
}
return null;
}
protected void onPostExecute(Void v) {
// ambil data dari Json database
try {
JSONArray Jarray = new JSONArray(result);
for(int i=0;i<Jarray.length();i++)
{
JSONObject Jasonobject = null;
//text_1 = (TextView)findViewById(R.id.txt1);
Jasonobject = Jarray.getJSONObject(i);
//get an output on the screen
//String id = Jasonobject.getString("id");
String name = Jasonobject.getString("name");
String db_detail="";
if(et.getText().toString().equalsIgnoreCase(name)) {
db_detail = Jasonobject.getString("detail");
text.setText(db_detail);
break;
}
//text_1.append(id+"\t\t"+name+"\t\t"+password+"\t\t"+"\n");
}
this.progressDialog.dismiss();
} catch (Exception e) {
// TODO: handle exception
Log.e("log_tag", "Error parsing data "+e.toString());
}
}
}
Using string builder I append the content and I find only the java script and I don't find the json data. How to I get the json data from the above URL.
In string "Result" in my code I get the below output.
<html>
<body>
<script type="text/javascript" src="/aes.js"></script>
<script>
function toNumbers(d) {
var e = [];
d.replace(/(..)/g, function(d) {
e.push(parseInt(d, 16))
});
return e
}
function toHex() {
for (var d = [], d = 1 == arguments.length && arguments[0].constructor == Array ? arguments[0] : arguments, e = "", f = 0; f < d.length; f++) e += (16 > d[f] ? "0" : "") + d[f].toString(16);
return e.toLowerCase()
}
var a = toNumbers("f655ba9d09a112d4968c63579db590b4"),
b = toNumbers("98344c2eee86c3994890592585b49f80"),
c = toNumbers("b8eeb5e790c4a5395d01cde6b8230fdd");
document.cookie = "__test=" + toHex(slowAES.decrypt(c, 2, a, b)) + "; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/";
location.href = "http://andpermission.byethost5.com/PermissionList.php?ckattempt=1";
</script>
<noscript>This site requires Javascript to work, please enable Javascript in your browser or use a browser with Javascript support</noscript>
How do I get only the json data from the URL instead the java script.
Try the full URL: http://andpermission.byethost5.com/PermissionList.php?ckattempt=1.
And also make sure you are using GET instead of POST, because that's what the URL refers to.
Here a good example: http://www.learn2crack.com/2013/10/android-json-parsing-url-example.html
On the other hand, there are some libraries like Aquery, Okhttp and Volley, that do this job very good.
I am getting a exception while working in json . My JSONPresr class is as follow
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.AsyncTask;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
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, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
System.out.println(" value in json sting"+json);
} 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());
Log.e("JSON Parser", "Error parsing data [" + e.getMessage()+"] "+json);
System.out.println(" error is here");
}
// return JSON String
return jObj;
}
}
I am getting my data by these code
String TAG_user_detail = "user_details";
String TAG_user_id = "user_id";
String TAG_user_name = "user_name";
String TAG_user_phone = "user_phone";
String TAG_ref_id = "ref_id";
JSONArray user_detail_jsonarray = null;
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting Array of Contacts
user_detail_jsonarray = json.getJSONArray(TAG_user_detail);
// looping through All Contacts
for(int i = 0; i < user_detail_jsonarray.length(); i++){
JSONObject c = user_detail_jsonarray.getJSONObject(i);
// Storing each json item in variable
int id = c.getInt(TAG_user_id);
System.out.println("user id from json"+id);
String name_fromjson = c.getString(TAG_user_name);
System.out.println("user name from json"+name_fromjson);
int phone_no_fromjson = c.getInt(TAG_user_phone);
System.out.println("user phone from json"+phone_no_fromjson);
int ref_id_fromjson = c.getInt(TAG_ref_id);
System.out.println("user ref id from json"+ref_id_fromjson);
}
} catch (JSONException e) {
e.printStackTrace();
}
But i am countiniously getting Exception in this line
user_detail_jsonarray = json.getJSONArray(TAG_user_detail);
My Stake Trace message is as
{"ref_id":1295,"user_name":"chand","user_phone":"9620085675","user_id":"1"} at user_details of type org.json.JSONObject cannot be converted to JSONArray
I tried many link but unfortunately i am not able to get my result. Please any body just help me to solve this issue. Thanks in advance to all
Its clear from error that you are trying to convert Json Object into Json array. That should not.
Here is the code to read your JSON response.
String json = "Assuming that here is your JSON response";
try {
JSONObject parentObject = new JSONObject(json);
JSONObject userDetails = parentObject.getJSONObject("user_details");
//And then read attributes like
String name = userDetails.getString("user_name");
String phone = userDetails.getString("user_phone");
String id = userDetails.getString("ref_id");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Above code is for {"user_details":{"user_id":"1","user_name":"chand","user_phone":"9620085675","ref_id":6386}} JSON.
Learn from exception
org.json.JSONObject cannot be converted to JSONArray
You are getting this exception org.json.JSONObject cannot be converted to JSONArray
because you are trying to convert JSONObject to JSONArray which is not possible.
{ represents json object node
[ represents json array node
your jsondata is json object format. change this line
JsonObject user_detail_jsonobj = json.getJSONObject(TAG_user_detail);
public class HttpPosrHitter {
public static String getJSONfromURL(String url, String member_id,
String phonenumber) {
InputStream is = null;
String result = "";
JSONObject jArray = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("memberid", member_id));
pairs.add(new BasicNameValuePair("numbers", phonenumber));
httppost.setEntity(new UrlEncodedFormEntity(pairs));
// http post
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection " + e.toString());
}
// convert response to string
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result = sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
try {
jArray = new JSONObject(result);
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return result;
}
}
This is class from which i am Post Phone Number to web service and getting response .
when i Post Number of Phone which has 15 to 20 contact i am getting response . but when i post number which has 150 contact i am not getting response one at a time i have to relaunch app two time then i am getting response . i dont know where i am doing mistake . even i am unable to read phone large file in chunks with fixed size buffer.
Just to solve all your potential bugs in one single shot: is there anything preventing you from using Retrofit and GSON or Jackson?
Each time I see such JSON/InputStream/URLConnection/... questions, I keep wondering why people keep on spending time to reinvent basic stuff instead of actually writing apps.
public class HttpPosrHitter {
public static String getJSONfromURL(String url, String member_id,
String phonenumber) {
InputStream is = null;
String result = "";
JSONObject jArray = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("memberid", member_id));
pairs.add(new BasicNameValuePair("numbers", phonenumber));
httppost.setEntity(new UrlEncodedFormEntity(pairs));
// http post
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
result = EntityUtils.toString(entity); //changes Made
} catch (Exception e) {
Log.e("log_tag", "Error in http connection " + e.toString());
}
try {
jArray = new JSONObject(result);
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return result;
}
}
Guys can you help me a little bit, Im getting this error:
"JSONException: Value <!DOCTYPE of type java.lang cannot be converted to JSONObject"
When I'm parsing the data here is my code:
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
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();
}catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
Here is the code where I'm instantiating the Parser:
private void fillSpinnerCabTypes() {
List<String> cabTypesSpinner = new ArrayList<String>();
JSONParser jsonParser = new JSONParser();
JSONObject cabTypesObject = jsonParser.getJSONFromUrl(urlTypeCabs);
try{
TypesArray = cabTypesObject.getJSONArray(TAG_TYPES);
for(int i = 0; i < TypesArray.length(); i++){
JSONObject c = TypesArray.getJSONObject(i);
String name = c.getString(TAG_NAME);
cabTypesSpinner.add(name);
}
}catch(Exception e ){
e.printStackTrace();
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, cabTypesSpinner);
final Spinner spnCabTypes = (Spinner)findViewById(R.id.spnTypeOfCab);
adapter.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
spnCabTypes.setAdapter(adapter);
}
I'm really stuck with this. I'm populating the spinner from a database in a backend on Django in the server.
This is my JSON data
{"Types": [{"name": "Normal"}, {"name": "Discapacitados"}, {"name": "Buseta"}]}
This issue comes from the server.
The URL you're requesting, send you back data but not in the JSON format.
The Exception you get is telling you that the String the server send you back starts with:
<!DOCTYPE
This can be:
A simple webpage (instead of raw JSON). It correspond to the first XML tag of a web page (source)
An error page generated by the server, and printed in HTML
To debug this further, simply print the content of your json variable in the logcat:
Log.d("Debug", json.toString());
jObj = new JSONObject(json);
This problem came in my code also.and solution was different.It occured due to spelling mistake of webservice.
Solution 1:
for example real the url is
http://example.com/directory/file.php
and i had used
http://example.com/directory/file1.php
Solution 2:
use loopj library .it exactly gives you the explained error.
AsyncHttpClient client = new AsyncHttpClient();
client.post(str , localRequestParams, new AsyncHttpResponseHandler() {
#Override
public void onFinish() {
super.onFinish();
Log.i("onFinish","onFinish");
}
#Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
Log.i("onSuccess","onSuccess");
}
#Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
Log.i("onFailure","onFailure");
}
});