I am pretty new to Android.I am trying to parse a JSON url. But I am getting following error "Json parsing error: No value for unofficial-summary".
Here is the response that I am getting.
Response from url: {"success":true,"data":{"summary":{"total":15616130,"confirmedCasesIndian":15616082,"confirmedCasesForeign":48,"discharged":13276039,"deaths":182553,"confirmedButLocationUnidentified":0},"unofficial-summary":[{"source":"covid19india.org","total":7945975,"recovered":7198877,"deaths":119538,"active":626192}],"regional":[{"loc":"Andaman and Nicobar Islands","confirmedCasesIndian":5466,"confirmedCasesForeign":0,"discharged":5243,"deaths":64,"totalConfirmed":5466},{"loc":"Andhra Pradesh","confirmedCasesIndian":976987,"confirmedCasesForeign":0,"discharged":915626,"deaths":7472,"totalConfirmed":976987},{"loc":"Arunachal Pradesh","confirmedCasesIndian":17113,"confirmedCasesForeign":0,"discharged":16835,"deaths":56,"totalConfirmed":17113},{"loc":"Assam","confirmedCasesIndian":227473,"confirmedCasesForeign":0,"discharged":217296,"deaths":1145,"totalConfirmed":227473},{"loc":"Bihar","confirmedCasesIndian":342059,"confirmedCasesForeign":0,"discharged":283863,"deaths":1841,"totalConfirmed":342059},{"loc":"Chandigarh","confirmedCasesIndian":35148,"confirmedCasesForeign":0,"discharged":30768,"deaths":421,"totalConfirmed":35148},{"loc":"Chhattisgarh","confirmedCasesIndian":574299,"confirmedCasesForeign":0,"discharged":442337,"deaths":6274,"totalConfirmed":574299},{"loc":"Dadra and Nagar Haveli and Daman and Diu","confirmedCasesIndian":5422,"confirmedCasesForeign":0,"discharged":4047,"deaths":4,"totalConfirmed":5422},{"loc":"Delhi","confirmedCasesIndian":905540,"confirmedCasesForeign":1,"discharged":807328,"deaths":12638,"totalConfirmed":905541},{"loc":"Goa","confirmedCasesIndian":69311,"confirmedCasesForeign":1,"discharged":60145,"deaths":926,"totalConfirmed":69312},{"loc":"Gujarat","confirmedCasesIndian":428177,"confirmedCasesForeign":1,"discharged":346063,"deaths":5615,"totalConfirmed":428178},{"loc":"Haryana","confirmedCasesIndian":371610,"confirmedCasesForeign":14,"discharged":318369,"deaths":3483,"totalConfirmed":371624},{"loc":"Himachal Pradesh","confirmedCasesIndian":79410,"confirmedCasesForeign":0,"discharged":68164,"deaths":1219,"totalConfirmed":79410},{"loc":"Jammu and Kashmir","confirmedCasesIndian":150238,"confirmedCasesForeign":0,"discharged":134697,"deaths":2071,"totalConfirmed":150238},{"loc":"Jharkhand","confirmedCasesIndian":172315,"confirmedCasesForeign":0,"discharged":137590,"deaths":1547,"totalConfirmed":172315},{"loc":"Karnataka","confirmedCasesIndian":1198644,"confirmedCasesForeign":0,"discharged":1025821,"deaths":13646,"totalConfirmed":1198644},{"loc":"Kerala","confirmedCasesIndian":1272637,"confirmedCasesForeign":8,"discharged":1148671,"deaths":4978,"totalConfirmed":1272645},{"loc":"Ladakh","confirmedCasesIndian":12556,"confirmedCasesForeign":0,"discharged":10610,"deaths":134,"totalConfirmed":12556},{"loc":"Lakshadweep","confirmedCasesIndian":1335,"confirmedCasesForeign":0,"discharged":817,"deaths":1,"totalConfirmed":1335},{"loc":"Madhya Pradesh","confirmedCasesIndian":433704,"confirmedCasesForeign":0,"discharged":350720,"deaths":4713,"totalConfirmed":433704},{"loc":"Maharashtra","confirmedCasesIndian":3960356,"confirmedCasesForeign":3,"discharged":3213464,"deaths":61343,"totalConfirmed":3960359},{"loc":"Manipur","confirmedCasesIndian":29869,"confirmedCasesForeign":0,"discharged":29106,"deaths":378,"totalConfirmed":29869},{"loc":"Meghalaya","confirmedCasesIndian":15116,"confirmedCasesForeign":0,"discharged":14105,"deaths":154,"totalConfirmed":15116},{"loc":"Mizoram","confirmedCasesIndian":5085,"confirmedCasesForeign":0,"discharged":4569,"deaths":12,"totalConfirmed":5085},{"loc":"Nagaland","confirmedCasesIndian":12650,"confirmedCasesForeign":0,"discharged":12299,"deaths":94,"totalConfirmed":12650},{"loc":"Odisha","confirmedCasesIndian":377464,"confirmedCasesForeign":0,"discharged":349377,"deaths":1953,"totalConfirmed":377464},{"loc":"Puducherry","confirmedCasesIndian":48974,"confirmedCasesForeign":0,"discharged":43184,"deaths":717,"totalConfirmed":48974},{"loc":"Punjab","confirmedCasesIndian":309316,"confirmedCasesForeign":0,"discharged":264562,"deaths":8045,"t
What am I doing wrong?
package com.sudarshan.jsonparse2;
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 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 = "https://api.rootnet.in/covid19-in/stats/latest";
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 c = jsonObj.getJSONArray("unofficial-summary").getJSONObject(0);
String source = c.getString("source");
int total = c.getInt("total");
int recovered = c.getInt("recovered");
int deaths = c.getInt("deaths");
int active = c.getInt("active");
// tmp hash map for single contact
HashMap<String, String> summary = new HashMap<>();
// adding each child node to HashMap key => value
summary.put("source", "source: "+source);
summary.put("total", "total:" +String.valueOf(total));
summary.put("recovered", "recovered" +String.valueOf(recovered));
summary.put("deaths", "deaths" + String.valueOf(deaths));
summary.put("active", "active" + String.valueOf(active));
// adding contact to contact list
contactList.add(summary);
} 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[]{ "source","total","recovered","deaths","active"},
new int[]{R.id.source, R.id.total,R.id.recovered,R.id.deaths,R.id.active});
lv.setAdapter(adapter);
}
}
}
Json is like
{
"success": true,
"data": {
"summary": {
//...
},
"unofficial-summary": [
{
//...
}]
}
}
Shoud get data first:
#Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String url = "https://api.rootnet.in/covid19-in/stats/latest";
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
// Add: 2021/4/26 add get data first
JSONObject jsonObj = new JSONObject(jsonStr);
String data = jsonObj.getString("data");
Log.w(TAG, "doInBackground: " + data);
// Getting JSON Array node
JSONObject c = new JSONObject(data).getJSONArray("unofficial-summary").getJSONObject(0);
String source = c.getString("source");
int total = c.getInt("total");
int recovered = c.getInt("recovered");
int deaths = c.getInt("deaths");
int active = c.getInt("active");
// tmp hash map for single contact
HashMap<String, String> summary = new HashMap<>();
// adding each child node to HashMap key => value
summary.put("source", "source: " + source);
summary.put("total", "total:" + String.valueOf(total));
summary.put("recovered", "recovered" + String.valueOf(recovered));
summary.put("deaths", "deaths" + String.valueOf(deaths));
summary.put("active", "active" + String.valueOf(active));
// adding contact to contact list
contactList.add(summary);
} catch (final JSONException e) {
//...
}
} else {
//...
}
return null;
}
I wrote this code and ı wrote httphandler etc. But when ı ran the app ı saw error:
.............
Java parsing error:Value of type java.lang.String cannot be converted to JSONObject
ı searched on internet but ı cannot solve it. what is wrong? where should ı add code?
MainActivity.java
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 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 = 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://api.androidhive.info/contacts/";
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
JSONArray contacts = jsonObj.getJSONArray("contacts");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("id");
String name = c.getString("name");
String email = c.getString("email");
// Phone node is JSON Object
JSONObject phone = c.getJSONObject("phone");
String mobile = phone.getString("mobile");
// tmp hash map for single contact
HashMap<String, String> contact = new HashMap<>();
// adding each child node to HashMap key => value
contact.put("id", id);
contact.put("name", name);
contact.put("email", email);
contact.put("mobile", mobile);
// 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[]{"email", "mobile"},
new int[]{R.id.email, R.id.mobile});
lv.setAdapter(adapter);
}
}
}
HttpHandler.java
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();
}
}
You need to receive JSON content but the server is returning HTML content.
Modify your server and add application/json as content type:
Content-type:application/json
Here is my code:
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, contactList,
R.layout.list_item, new String[]{ "rendered", "renderedcont"},
new int[]{R.id.title, R.id.content});
//new int[]{R.id.title});
lv.setAdapter(adapter);
}
How I can show the text with HTML supported?
Here is the full code:
package com.codespeedy.jsonreader;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
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 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 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 = "https://www.eyeswift.com/wp-json/wp/v2/posts/";
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
JSONArray jsnarray = new JSONArray(jsonStr);
// looping through All Contacts
for (int i = 0; i < jsnarray.length(); i++) {
JSONObject c = jsnarray.getJSONObject(i);
String id = c.getString("id");
String date = c.getString("date");
String type = c.getString("type");
String link = c.getString("link");
String author = c.getString("author");
// String gender = c.getString("title");
// Phone node is JSON Object
JSONObject title = c.getJSONObject("title");
String rendered = title.getString("rendered");
JSONObject content = c.getJSONObject("content");
String renderedcont = content.getString("rendered");
// tmp hash map for single contact
HashMap<String, String> contact = new HashMap<>();
// adding each child node to HashMap key => value
contact.put("id", id);
contact.put("date", date);
contact.put("author", author);
contact.put("link", link);
contact.put("rendered", rendered);
contact.put("renderedcont", renderedcont);
// 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[]{ "rendered", "renderedcont"},
new int[]{R.id.title, R.id.content});
//new int[]{R.id.title});
lv.setAdapter(adapter);
}
}
}
I want to add a searchview to filter results. Please help me with this. I have tried all the methods available online but all are for custom adapter and none seems to be working for my project.
My MainActivity.class
package info.androidhive.jsonparsing;
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://api.androidhive.info/contacts/";
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 {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
JSONArray contacts = jsonObj.getJSONArray("contacts");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("id");
String name = c.getString("name");
String email = c.getString("email");
String address = c.getString("address");
String gender = c.getString("gender");
// Phone node is JSON Object
JSONObject phone = c.getJSONObject("phone");
String mobile = phone.getString("mobile");
String home = phone.getString("home");
String office = phone.getString("office");
// tmp hash map for single contact
HashMap<String, String> contact = new HashMap<>();
// adding each child node to HashMap key => value
contact.put("id", id);
contact.put("name", name);
contact.put("email", email);
contact.put("mobile", mobile);
// 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);
// 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[]{"name", "email",
"mobile"}, new int[]{R.id.name,
R.id.email, R.id.mobile});
lv.setAdapter(adapter);
}
}
}
My HttpHandler.class
package info.androidhive.jsonparsing;
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 Ravi Tamada on 01/09/16.
* www.androidhive.info
*/
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();
}
}
U can use latest recylerview to achieve this (robust and better performance)
Or Easy way: try this MaterialSearchViewlibrary
I am trying to show JSON data into Mapview, but always getting blank map.
I knew that to populate I need to use onPostExecute() in my activity but I am confuse where I need to put onPostExecute() method and what are the lines I need to place in that.
Please someone make these changes, below I have written my code, advance thanks to viewers and readers
JSON Data:-
{
"maps": [
{
"title": "Place One",
"latitude" : "46.483742",
"longitude" : "7.663157",
"country": "Switzerland"
},
{
"title" : "Place Two",
"latitude" : "59.25235",
"longitude" : "18.465536",
"country" : "Sweden"
},
{
"title" : "Place Three",
"latitude" : "56.404182",
"longitude" : "-3.818855",
"country" : "Scotland"
}
]
}
Activity Code:-
mapOverlays = mapView.getOverlays();
drawable = getResources().getDrawable(R.drawable.ic_launcher);
itemizedOverlay = new SimpleItemizedOverlay (drawable, mapView);
itemizedOverlay.setShowClose(false);
itemizedOverlay.setShowDisclosure(true);
itemizedOverlay.setSnapToCenter(false);
class DownloadWebPageTask extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... urls) {
HttpClient client = new DefaultHttpClient();
// Perform a GET request for a JSON list
HttpUriRequest request = new HttpGet("https://dl.***.com/maps.json");
// Get the response that sends back
HttpResponse response = null;
try {
response = client.execute(request);
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Convert this response into a readable string
String jsonString = null;
try {
jsonString = StreamUtils.convertToString(response.
getEntity().getContent());
} catch (IllegalStateException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Create a JSON object that we can use from the String
JSONObject json = null;
try {
json = new JSONObject(jsonString);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try{
JSONArray jsonArray = json.getJSONArray("maps");
Log.e("log_tag", "Opening JSON Array ");
for
(int i=0;i < jsonArray.length();i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
String latitude = jsonObject.getString("latitude");
String longitude = jsonObject.getString("longitude");
String title = jsonObject.getString("title");
String country = jsonObject.getString("country");
double lat = Double.parseDouble(latitude);
double lng = Double.parseDouble(longitude);
Log.e("log_tag", "ADDING GEOPOINT"+title);
point = new GeoPoint(
(int) (lat * 1E6),
(int) (lng * 1E6));
OverlayItem overlayItem = new OverlayItem(point, title,
country);
itemizedOverlay.addOverlay(overlayItem);
}
}catch(JSONException e) {
Log.e("log_tag", "Error parsing data "+e.toString());
}
itemizedOverlay.populateNow();
mapOverlays.add(itemizedOverlay);
if (savedInstanceState == null) {
MapController controller = mapView.getController();
controller.setCenter(point);
controller.setZoom(7);
} else {
// example restoring focused state of overlays
int focused;
focused = savedInstanceState.getInt("focused_1", -1);
if (focused >= 0) {
itemizedOverlay.setFocus
(itemizedOverlay.getItem(focused));
}
}
return jsonString; }
}
}
I understand your problem, the following code is how to get the json data and showing in a listview. It is helpful for you to show when you will write the PostExecute Method. you have to set the overlay items in PostExecute method.
package com.androidhive.jsonparsing;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
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.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class AndroidJSONParsingActivity extends ListActivity {
// url to make request
private static String url = "http://api.androidhive.info/contacts/";
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// contacts JSONArray
JSONArray contacts = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
new GetEventsTask().execute("");
}
protected class GetEventsTask extends
AsyncTask<String, Integer, ArrayList<HashMap<String, String>>> {
protected ArrayList<HashMap<String, String>> contactList;
private final ProgressDialog dialog = new ProgressDialog(
AndroidJSONParsingActivity.this);
//PreExecute Method
protected void onPreExecute() {
this.dialog.setMessage("Loading, Please Wait..");
this.dialog.setCancelable(false);
this.dialog.show();
}
//doInBackground Method
#Override
protected ArrayList<HashMap<String, String>> doInBackground(
String... params) {
contactList = new ArrayList<HashMap<String, String>>();
// 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();
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 (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
Log.i("json objects",""+json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
try {
// Getting Array of Contacts
contacts = jObj.getJSONArray(TAG_CONTACTS);
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
String email = c.getString(TAG_EMAIL);
String address = c.getString(TAG_ADDRESS);
String gender = c.getString(TAG_GENDER);
// Phone number is agin JSON Object
JSONObject phone = c.getJSONObject(TAG_PHONE);
String mobile = phone.getString(TAG_PHONE_MOBILE);
String home = phone.getString(TAG_PHONE_HOME);
String office = phone.getString(TAG_PHONE_OFFICE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
map.put(TAG_EMAIL, email);
map.put(TAG_PHONE_MOBILE, mobile);
// adding HashList to ArrayList
contactList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
return contactList;
}
//onPostExecute Method
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
// selecting single ListView item
ListView lv = getListView();
ListAdapter adapter = new SimpleAdapter(getApplicationContext(),
contactList, R.layout.list_item, new String[] { TAG_NAME,
TAG_EMAIL, TAG_PHONE_MOBILE }, new int[] {
R.id.name, R.id.email, R.id.mobile });
lv.setListAdapter(adapter);
// Launching new screen on Selecting Single ListItem
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
String description = ((TextView) view
.findViewById(R.id.mobile)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
SingleMenuItemActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_EMAIL, cost);
in.putExtra(TAG_PHONE_MOBILE, description);
startActivity(in);
}
});
//Dismiss the dialog
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
}
}
}