json parsing error in android java

json parsing error in android java - java

hi i'm trying to get element of this url, but every time an error occured
this url get you a json but i couldn't parse it
i try
private class Geturl extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall("https://www.instagram.com/"+username+"/?__a=1".trim());
//Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
//user is correct or i use wrong
//check url and parse it with online json parser
JSONArray contacts = jsonObj.getJSONArray("user");
JSONObject c = contacts.getJSONObject(0);
//profile_pic_url_hd is node or not ?
img_url=c.getString("profile_pic_url_hd");
} catch (final JSONException e) {
//Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
//Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
}
}
parsed Json in picture
no error occur in http handler just in getting elements error happened
httphandler class
import android.util.Log;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
/**
* Created by jefferson on 3/24/2017.
*/
public class HttpHandler {
private static final String TAG = HttpHandler.class.getSimpleName();
public HttpHandler() {
}
public String makeServiceCall(String reqUrl) {
String response = null;
try {
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
// read the response
InputStream in = new BufferedInputStream(conn.getInputStream());
response = convertStreamToString(in);
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (ProtocolException e) {
Log.e(TAG, "ProtocolException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
return response;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
thanks if anyone could tell me i get correct elements or not
thanks in advance.

JSONObject contacts = jsonObj.getJSONObject("user");
img_url=c.getString("profile_pic_url_hd");
The user object is not an array.

Related

I have taken text from JSON format of an API now I want to add image to it from same API in my android app

I'm new to android and finding it tough to update realtime text and images from API's in JSON format. I've successfully added text to my listview. Now I want to add image beside it. Thanks in advance.
MainActivity.java file
package com.example.android.samplelayout;
import android.media.Image;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.net.Uri;
import android.graphics.drawable.Drawable;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
private String TAG = MainActivity.class.getSimpleName();
private ListView lv;
ArrayList<HashMap<String, String>> contactList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList = new ArrayList<>();
lv = (ListView) findViewById(R.id.list);
new GetContacts().execute();
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
Toast.makeText(MainActivity.this,"Json Data is downloading",Toast.LENGTH_LONG).show();
}
#Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String url = "http://webhose.io/search?token=9c55cbb1-2f1c-4700-9c1e-67e685152506&format=json&q=Indian%20Startup";
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
//JSONObject responseObject = jsonObj.getJSONObject("response");
JSONArray responseArray = jsonObj.getJSONArray("posts");
// looping through All Contacts
for (int i = 0; i < responseArray.length(); i++) {
JSONObject firstObject = responseArray.getJSONObject(i);
//JSONObject titleObject = firstObject.getJSONObject("title");
// Extract out the title, time, and tsunami values
//String image = firstObject.getString("main_image");
String title = firstObject.getString("title");
// tmp hash map for single contact
HashMap<String , String> contact = new HashMap<>();
// adding each child node to HashMap key => value
//contact.put("pic", image);
contact.put("name", title);
// adding contact to contact list
contactList.add(contact);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG).show();
}
});
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, contactList,R.layout.list_item, new String[]{"name"}, new int[]{ R.id.name});
lv.setAdapter(adapter);
}
}
}
HttpHandler.java file
package com.example.android.samplelayout;
import android.util.Log;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
public class HttpHandler {
private static final String TAG = HttpHandler.class.getSimpleName();
public HttpHandler() {
}
public String makeServiceCall(String reqUrl) {
String response = null;
try {
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
// read the response
InputStream in = new BufferedInputStream(conn.getInputStream());
response = convertStreamToString(in);
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (ProtocolException e) {
Log.e(TAG, "ProtocolException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
return response;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}

I would suggest using a library that automatically puts an Image into an ImageView only using the Url of the image you want to use. Picasso would be a good Library for your use. You have to fetch the Image URL off the Json object and load it into the ImageView using Picasso's load().into()

ANDROID - how to display JSONArray into textview

I've set up a php script to create json here, but when i try to display the JSONArray i got some error like this on my Android Monitor..
Value (html)(body)(script of type java.lang.String cannot be converted to JSONArray
can someone tell me how to fix it?
MainActivity.java
package flix.yudi.okhttp1;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
private String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
private ListView lv;
// URL to get contacts JSON
private static String url = "http://zxccvvv.cuccfree.com/send_data.php";
ArrayList<HashMap<String, String>> contactList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList = new ArrayList<>();
lv = (ListView) findViewById(R.id.list);
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
*/
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONArray jsonObj = new JSONArray(jsonStr);
// Getting JSON Array node
JSONArray pertanyaan = jsonObj.getJSONArray("pertanyaan");
// looping through All Contacts
for (int i = 0; i < pertanyaan.length(); i++) {
JSONObject c = pertanyaan.getJSONObject(i);
String id = c.getString("id");
String ask = c.getString("ask");
// tmp hash map for single contact
HashMap<String, String> pertanyaans = new HashMap<>();
// adding each child node to HashMap key => value
pertanyaans.put("id", id);
pertanyaans.put("ask", ask);
// adding contact to contact list
contactList.add(pertanyaans);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[]{"ask"}, new int[]{R.id.ask});
lv.setAdapter(adapter);
}
}
}
HttpHandler.java
package flix.yudi.okhttp1;
import android.util.Log;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
public class HttpHandler {
private static final String TAG = HttpHandler.class.getSimpleName();
public HttpHandler() {
}
public String makeServiceCall(String reqUrl) {
String response = null;
try {
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
// read the response
InputStream in = new BufferedInputStream(conn.getInputStream());
response = convertStreamToString(in);
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (ProtocolException e) {
Log.e(TAG, "ProtocolException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
return response;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
I got the reference code from here
any idea/ another reference method to solve?
EDIT
send_data.php
<?php
include 'dbconfig.php';
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT id, ask FROM pertanyaan";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row[] = $result->fetch_assoc()) {
$json = json_encode($row);
}
} else {
echo "0 results";
}
mysql_close($dbname);
echo $json;
?>

you are trying to get a jsonarray from jsonObj with key pertanyaan which in-fact is a string value so just traverse through array while fetching the json object using indexes
JSONArray jsonObj = new JSONArray(jsonStr);
// Getting JSON Array node
//JSONArray pertanyaan = jsonObj.getJSONArray("pertanyaan"); problem
// looping through All Contacts
for (int i = 0; i < jsonObj.length(); i++) {
JSONObject c = jsonObj.getJSONObject(i);
String id = c.getString("id");
String ask = c.getString("ask");
HashMap<String, String> pertanyaans = new HashMap<>();
pertanyaans.put("id", id);
pertanyaans.put("ask", ask);
contactList.add(pertanyaans);
}
Note : There is no such jasonarray with key pertanyaan in your response
PHP update : Use
echo json_encode($json);

According to your service, while Response received you will get JSONArray like this [{"id":"1","ask":"pertanyaan ke 1"},{"id":"2","ask":"pertanyaan ke 2"},{"id":"3","ask":"pertanyaan ke 3"},{"id":"4","ask":"pertanyaan ke 4"},{"id":"5","ask":"pertanyaan ke 5"}]
you just need to store this response in JSONArray
JSONArray jsonArray = new JSONArray();
jsonArray = (response);
now you have respons in your jsonArray so you can opt out value from it.
here is the sample code snippet
for (int i = 0; i < jsonArray.length(); i++) {
try {
String id = jsonArray.getJSONObject(i).getString("id");
String ask = jsonArray.getJSONObject(i).getString("ask");
Log.i("TAG", "id "+ id + " ask "+ ask);
//you can set value to text view here
textview.settext(id + " "+ ask);
} catch (JSONException e) {
e.printStackTrace();
}
}

Android Volley JSON parse

I am trying to fetch data from server and to display it in a ListView, but it is not working here, I am using the Volley library. I am looking for the Volley code but I couldn't get it, so can I get the code corresponding to this?
JSONParse.java:
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.client.HttpClient;
import org.json.JSONException;
public class JSONParse {
static InputStream iStream=null;
static JSONArray jarray=null;
static String json="";
public JSONParse(){
}
public JSONArray getJSONFromUrl(String url){
StringBuilder builder=new StringBuilder();
HttpClient client=new DefaultHttpClient();
//------------J.G-----------------
/*HttpClient client=new DefaultHttpClient();
HttpGet httpGet=new HttpGet(url);
httpGet.setHeader("Content-Type", "application/json");
httpGet.setHeader("jwttoken", "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJFUk0iLCJpc3MiOiJFUk0iLCJpYXQiOjE0MzM2OTczMjd9.2zd4OlKjW3Yfcd_q2FOoyEGpNrFbf7EuHeIkZ8ponr0");*/
try {
HttpGet httpGet=new HttpGet(url);
httpGet.setHeader("Content-Type", "application/json");
httpGet.setHeader("jwttoken", "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJFUk0iLCJpc3MiOiJFUk0iLCJpYXQiOjE0MzM2OTczMjd9.2 zd4OlKjW3Yfcd_q2FOoyEGpNrFbf7EuHeIkZ8ponr0");
HttpResponse response = client.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
} else {
Log.e("==>", "Failed to download file");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
jarray= new JSONArray(builder.toString());
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data"+ e.toString());
}
return jarray;
}
}

implement your code like this:
public void getData(){
//Showing a progress dialog
final ProgressDialog loading = ProgressDialog.show(this,"Loading Data", "Please wait...",false,false);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest
(Request.Method.POST, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
loading.dismiss();
parseData(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
Log.d("Json Error:",error.toString());
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(jsonObjectRequest);
}
public void parseData(JSONObject object){
try {
JSONArray jsonArray=object.getJSONArray("worldpopulation");
Log.d("Json Array:", jsonArray.toString());
for (int i=0;i<jsonArray.length();i++){
Data data=new Data();
JSONObject obj;
try {
obj=jsonArray.getJSONObject(i);
data.setImageUrl(obj.getString("flag"));
data.setName(obj.getString("country"));
data.setRank(obj.getString("rank"));
data.setPopulation(obj.getString("population"));
items.add(data);
}
catch (JSONException e){
Log.d("Error in Parse Object:", e.toString());
}
}
} catch (JSONException e) {
Log.d("Error in parse Array:", e.toString());
}
mAdapter = new MyAdapter(items,this);
mRecyclerView.setAdapter(mAdapter);
}
and for more follow this Tutorial

Not sure if this is what you want: JsonRequest.java.
And here's how I use Volley to parse Json data.
Say an url represents the Json data below:
[
{
"name" : "Ravi Tamada",
"email" : "ravi8x#gmail.com",
"phone" : {
"home" : "08947 000000",
"mobile" : "9999999999"
}
},
{
"name" : "Tommy",
"email" : "tommy#gmail.com",
"phone" : {
"home" : "08946 000000",
"mobile" : "0000000000"
}
}
]
The parse code is below:
JsonArrayRequest req = new JsonArrayRequest(urlJsonArry,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
try {
// Parsing json array response
// loop through each json object
jsonResponse = "";
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response
.get(i);
String name = person.getString("name");
String email = person.getString("email");
JSONObject phone = person
.getJSONObject("phone");
String home = phone.getString("home");
String mobile = phone.getString("mobile");
jsonResponse += "Name: " + name + "\n\n";
jsonResponse += "Email: " + email + "\n\n";
jsonResponse += "Home: " + home + "\n\n";
jsonResponse += "Mobile: " + mobile + "\n\n\n";
}
txtResponse.setText(jsonResponse);
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
hidepDialog();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
hidepDialog();
}
});
// Adding request to request queue, please substitute here with your own queue
VolleyQueue.add(req);
For more reference see this link.

HTTP Get Request in Android json

Hi, i don't undestand why this doesn't work, i am trying to retrieve whatever comes after "offer" in the specified url and then display it but when i click on the Offer button on android screen nothing happens. Please help if you could. I have the internet permission in manifest.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
public class LoggedIn extends Activity {
AlertDialog alertDialogStores;
ObjectItem[] ObjectItemData = new ObjectItem[5];
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.logged_in);
// a button to show the pop up with a list view
View.OnClickListener handler = new View.OnClickListener(){
public void onClick(View v) {
switch (v.getId()) {
case R.id.buttonShowPopUp:
LoaderTask task = new LoaderTask();
task.execute();
break;
}
}
};
findViewById(R.id.buttonShowPopUp).setOnClickListener(handler);
}
class LoaderTask extends AsyncTask<Void , Void ,String>{
ProgressDialog progressDialog ;
public LoaderTask(){
progressDialog = new ProgressDialog(SplashActivity.this);
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(false);
progressDialog.setMessage("Loading app data...");
}
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.show();
}
#Override
protected String doInBackground(Void... params) {
return connect("http://ec2-54-175-18-179.compute-1.amazonaws.com/customers/37.json");
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
showPopUp(result);
}
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
public String connect(String url)
{
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
HttpResponse response;
try {
response = httpclient.execute(httpget);
//Log.i(TAG,response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
instream.close();
return result;
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return null;
}
public void showPopUp(String result){
try{
JSONArray jsonArray = new JSONArray(result);
for(int i = 0 ; i <= 5 ; i++){
JSONObject o = jsonArray.getJSONObject(i);
String http_response = o.getString("offer");
System.out.println("test "+http_response);
//ObjectItemData[i] = new ObjectItem(o);
ObjectItemData[0] = new ObjectItem(http_response);
ObjectItemData[1] = new ObjectItem(http_response);
ObjectItemData[2] = new ObjectItem(http_response);
ObjectItemData[3] = new ObjectItem(http_response);
ObjectItemData[4] = new ObjectItem(http_response);
// adapter instance
ArrayAdapterItem adapter = new ArrayAdapterItem(this, R.layout.list_view_row_item, ObjectItemData);
// create a new ListView, set the adapter and item click listener
ListView listViewItems = new ListView(this);
listViewItems.setAdapter(adapter);
listViewItems.setOnItemClickListener(new OnItemClickListenerListViewItem());
// put the ListView in the pop up
alertDialogStores = new AlertDialog.Builder(LoggedIn.this)
.setView(listViewItems)
.setTitle("Offers")
.show();
}
} catch(Exception e){e.printStackTrace();}
finally{System.out.println("Success");
}
}
}

class LoaderTask extends AsyncTask<Void , Void ,String>{
ProgressDialog progressDialog ;
public LoaderTask(){
progressDialog = new ProgressDialog(SplashActivity.this);
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(false);
progressDialog.setMessage("Loading app data...");
}
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.show();
}
#Override
protected String doInBackground(Void... params) {
return connect("http://ec2-54-175-18-179.compute-1.amazonaws.com/customers/37.json");
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
showPopUp(result);
}
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
public String connect(String url)
{
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
HttpResponse response;
try {
response = httpclient.execute(httpget);
//Log.i(TAG,response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
instream.close();
return result;
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return null;
}
public void showPopUp(String result){
try{
JSONArray jsonArray = new JSONArray(result);
for(int i = 0 ; i < jsonArray.length() ; i++){
JSONObject o = jsonArray.getJSONObject(i);
String http_response = o.getString("offer");
System.out.println("test "+http_response);
ObjectItemData[i] = new ObjectItem(http_response);
}
//and populate your listview here
} catch(Exception e){e.printStackTrace();}
finally{System.out.println("Success");
}
}
and call this to do task
new LoaderTask().execute();

Android Emulator connecting to Local Web service

Hi all I have a local web service set up on my machine, it is a web service which was built in netbeans using the JPA. I have it connecting locally to a mySQL server also. I have both the database and web service connecting. The webservice can display XML/JSON. My problem is getting the android emulator to consume the JSON from the web service. The URL we are using is "http://10.0.2.2:8080/Web4/resources/hotel2s/" this should allow the emulator to connect to the web service am I correct? When I try to launch and consume the emulator crashes. Here is some source code. We are sure that it should read in and parse with GSON etc but we are not sure if it is connecting or not.
RESULT CLASS
public class hotel_Result
{
#SerializedName("hotelAddress")
protected String hotelAddress;
#SerializedName("HotelDescription")
protected String hotelDescription;
#SerializedName("hotelName")
protected String hotelName;
#SerializedName("hotelRating")
protected int hotelRating;
}
HOTEL RESPONSE CLASS
public class hotel_Response
{
public List<hotel_Result> hotelresults;
public String query;
}
MAIN CLASS
public class connectRest extends Activity
{
// We tried Reg's machines ip here as well and it crashed also used different ips is this correct for the emulator to connect to it?
String url = "http://10.0.2.2:8080/Web4/resources/hotel2s/";
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
InputStream source = retrieveStream(url); // Stream in the URL
Gson gson = new Gson(); // GSON object
Reader reader = new InputStreamReader(source); // Read in the stream
hotel_Response response = gson.fromJson(reader,hotel_Response.class); // Fill in the variables in the class hotel_response
Toast.makeText(this,response.query,Toast.LENGTH_SHORT).show();
List<hotel_Result> hotelresults = response.hotelresults;
for(hotel_Result hotel_Result : hotelresults)
{
Toast.makeText(this,hotel_Result.hotelName,Toast.LENGTH_SHORT).show();
}
}
private InputStream retrieveStream(String url)
{
DefaultHttpClient client = new DefaultHttpClient();
HttpGet getRequest = new HttpGet(url);
try{
HttpResponse getResponse = client.execute(getRequest);
final int statusCode = getResponse.getStatusLine().getStatusCode();
if(statusCode != HttpStatus.SC_OK)
{
Log.w(getClass().getSimpleName(),"Error" + statusCode + " for URL " + url);
return null;
}
HttpEntity getResponseEntity = getResponse.getEntity();
return getResponseEntity.getContent();
}
catch(IOException e)
{
getRequest.abort();
Log.w(getClass().getSimpleName(),"Error for URL " + url, e);
}
return null;
}
}

Make sure you have the allow internet access permission in your manifest.
Here's a better try-catch implementation and it does the work in an AsyncTask() to keep the UI thread happy :) The original article can be found on Java Code Geeks (http://www.javacodegeeks.com/2011/01/android-json-parsing-gson-tutorial.html) but it lacks my improvements!
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.gson.Gson;
import com.javacodegeeks.android.json.model.Result;
import com.javacodegeeks.android.json.model.SearchResponse;
public class JsonParsingActivity extends Activity {
private static final String url = "http://search.twitter.com/search.json?q=javacodegeeks";
protected InitTask _initTask;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button)findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
_initTask = new InitTask();
_initTask.execute( getApplicationContext() );
}
});
}
#Override
public void onStop() {
super.onStop();
_initTask.cancel(true);
}
protected class InitTask extends AsyncTask<Context, String, SearchResponse>
{
#Override
protected SearchResponse doInBackground( Context... params )
{
InputStream source = retrieveStream(url);
SearchResponse response = null;
if (source != null) {
Gson gson = new Gson();
Reader reader = new InputStreamReader(source);
try {
response = gson.fromJson(reader, SearchResponse.class);
publishProgress( response.query );
reader.close();
} catch (Exception e) {
Log.w(getClass().getSimpleName(), "Error: " + e.getMessage() + " for URL " + url);
}
}
if (!this.isCancelled()) {
return response;
} else {
return null;
}
}
#Override
protected void onProgressUpdate(String... s)
{
super.onProgressUpdate(s);
Toast.makeText(getApplicationContext(), s[0], Toast.LENGTH_SHORT).show();
}
#Override
protected void onPostExecute( SearchResponse response )
{
super.onPostExecute(response);
StringBuilder builder = new StringBuilder();
if (response != null) {
String delim = "* ";
List<Result> results = response.results;
for (Result result : results) {
builder.append(delim).append(result.fromUser);
delim="\n* ";
}
}
if (builder.length() > 0) {
Toast.makeText(getApplicationContext(), builder.toString(), Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "The response was empty.", Toast.LENGTH_SHORT).show();
}
}
#Override
protected void onCancelled() {
super.onCancelled();
Toast.makeText(getApplicationContext(), "The operation was cancelled.", 1).show();
}
private InputStream retrieveStream(String url) {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet getRequest;
try {
getRequest = new HttpGet(url);
HttpResponse getResponse = client.execute(getRequest);
HttpEntity getResponseEntity = getResponse.getEntity();
return getResponseEntity.getContent();
} catch (Exception e) {
Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
return null;
}
}
}
}

Here's a full try-catch implementation of the code above. I implemented this first and then realized all I really needed to know was pass/fail. Anyway, might help someone. Again, props go to Java Code Geeks for getting me started ... Android JSON Parsing with GSON Tutorial
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.gson.Gson;
import com.google.gson.JsonIOException;
import com.google.gson.JsonSyntaxException;
import com.javacodegeeks.android.json.model.Result;
import com.javacodegeeks.android.json.model.SearchResponse;
public class JsonParsingActivity extends Activity {
private static final String url = "http://search.twitter.com/search.json?q=javacodegeeks";
protected InitTask _initTask;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button)findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
_initTask = new InitTask();
_initTask.execute( getApplicationContext() );
}
});
}
#Override
public void onStop() {
super.onStop();
_initTask.cancel(true);
}
protected class InitTask extends AsyncTask<Context, String, SearchResponse>
{
#Override
protected SearchResponse doInBackground( Context... params )
{
InputStream source = retrieveStream(url);
SearchResponse response = null;
if (source != null) {
Gson gson = new Gson();
Reader reader = new InputStreamReader(source);
try {
response = gson.fromJson(reader, SearchResponse.class);
publishProgress( response.query );
} catch (JsonSyntaxException e) {
Log.w(getClass().getSimpleName(), "Error: " + e.getMessage() + " for URL " + url);
return null;
} catch (JsonIOException e) {
Log.w(getClass().getSimpleName(), "Error: " + e.getMessage() + " for URL " + url);
return null;
} finally {
try {
reader.close();
} catch (IOException e) {
Log.w(getClass().getSimpleName(), "Error: " + e.getMessage() + " for URL " + url);
}
}
}
if (!this.isCancelled()) {
return response;
} else {
return null;
}
}
#Override
protected void onProgressUpdate(String... s)
{
super.onProgressUpdate(s);
Toast.makeText(getApplicationContext(), s[0], Toast.LENGTH_SHORT).show();
}
#Override
protected void onPostExecute( SearchResponse response )
{
super.onPostExecute(response);
StringBuilder builder = new StringBuilder();
if (response != null) {
String delim = "* ";
List<Result> results = response.results;
for (Result result : results) {
builder.append(delim).append(result.fromUser);
delim="\n* ";
}
}
if (builder.length() > 0) {
Toast.makeText(getApplicationContext(), builder.toString(), Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "The response was empty.", Toast.LENGTH_SHORT).show();
}
}
#Override
protected void onCancelled() {
super.onCancelled();
Toast.makeText(getApplicationContext(), "The operation was cancelled.", 1).show();
}
private InputStream retrieveStream(String url) {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet getRequest;
try {
getRequest = new HttpGet(url);
try {
HttpResponse getResponse = client.execute(getRequest);
final int statusCode = getResponse.getStatusLine().getStatusCode();
if (statusCode != HttpStatus.SC_OK) {
Log.w(getClass().getSimpleName(), "Error " + statusCode + " for URL " + url);
return null;
}
HttpEntity getResponseEntity = getResponse.getEntity();
try {
return getResponseEntity.getContent();
} catch (IllegalStateException e) {
getRequest.abort();
Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
return null;
} catch (IOException e) {
getRequest.abort();
Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
return null;
}
} catch (ClientProtocolException e) {
getRequest.abort();
Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
} catch (IOException e) {
getRequest.abort();
Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
}
} catch (IllegalArgumentException e) {
Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
}
return null;
}
}
}

Develop Reference

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json parsing error in android java - java

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