Parsing multiple JSON strings

Parsing multiple JSON strings - android

I would like to thank all the users in this community for helping me get as far as I am in my project today.
I now need your help once again. So far, I am able to establish a connection in my project from this JSON link (REMOVED FOR PRIVACY CONCERNS)
The problem is I am only able to parse one string, (firstName)
Here is my code:
public class JSONActivity extends Activity {
static TextView http;
HttpClient client;
JSONObject json;
final static String URL = "REMOVED FOR PRIVACY CONCERNS
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
http = (TextView) findViewById(R.id.http);
client = new DefaultHttpClient();
new Read().execute("firstName");
}
public JSONObject getpw(String password) throws ClientProtocolException,
IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
url.append(password);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONObject getname = new JSONObject(data);
return getname;
} else {
Toast.makeText(JSONActivity.this, "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
json = getpw("trustme");
return json.getString("firstName");
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
http.setText(result);
}
}
}
My question is, how can I parse multiple strings rather than just "firstName"?

You can get it all by doing the following:
String firstname = json.getString("firstName");
String lastname = json.getString("lastName");
int checkedIn = json.getInt("checkedIn");
int updated = json.getInt("checkedindatetime");
JSONObject address = json.getJSONObject("address");
String streetaddress = address.getString("streetAddress");
String city = address.getString("city");
etc...
JSONArray phoneNumbers = json.getJSONArray("phoneNumber");
String type = phoneNumbers.getJSONObject(0).getString("type");
etc...
Hope this helps.
A good resource for looking at json, is this validator.

Related

How to make elements(dynamic) obtained as JSON response, clickable in Android and connecting them to some web link?

The following is the CODE I am using to get the data from Codeforces.com API as JSON response. If anyone can please help me improve this to convert them to clickable links and then attach a web link to them. :
public class Http extends Activity {
TextView httpStuff;
HttpClient client;
JSONObject json;
final static String URL = "http://codeforces.com/api/user.status?handle=";
String m = "";
public static String[] sarr = new String[200];
public static String[] name = new String[200];
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.httpex);
httpStuff = (TextView)findViewById(R.id.tvHttp);
client = new DefaultHttpClient();
new Read().execute("result");
}
public JSONObject lastSub(String username) throws ClientProtocolException, IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
url.append(username);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if(status == 200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONObject last = new JSONObject(data);
//JSONObject last = new JSONObject(data).getJSONArray("result").getJSONObject(0).getJSONObject("problem");
JSONArray array = new JSONObject(data).getJSONArray("result");
String m1=null, m2=null, m3=null;
String n1 = System.getProperty("line.separator");
int cnt=0, flag=0;
for(int k=0; k<array.length(); k++)
{
last = array.getJSONObject(k).getJSONObject("problem");
JSONObject v = array.getJSONObject(k);
if(v.getString("verdict").contentEquals("OK")) {
m1 = last.getString("name");
m2= last.getString("contestId");
m2= m2.concat("/");
m3= last.getString("index");
m2 = m2.concat(m3);
flag = 0;
for(int i=0; i<cnt; i++) {
if (sarr[i].equals(m1)) {
flag = 1;
}
}
if(flag == 0) {
m = m.concat(m1);
m= m.concat(n1);
sarr[cnt] = m1;
name[cnt] = m2;
cnt++;
}
}
}
return last;
}
else {
Toast.makeText(Http.this, "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask <String, Integer, String> {
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
json = lastSub("avm12&from=1&count=100");
return m;
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
httpStuff.setText(result);
}
}
}

Make sure your main layout R.layout.httpex has a ListView.
(Should look like this)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
Create a new layout list_item.xml representing the data you want to display :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/pTitle"
android:textAppearance="#android:style/TextAppearance.DeviceDefault.Medium"
android:padding="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/pUrl"
android:visibility="gone" />
</LinearLayout>
Then edit your code like this :
public class Http extends Activity {
TextView httpStuff;
HttpClient client;
JSONObject json;
final static String URL = "http://codeforces.com/api/user.status?handle=";
String m = "";
ListView list;
public static ArrayList<HashMap<String, String>> problemdata= new ArrayList<HashMap<String, String>>();
//above ArrayList replacing sarr & name
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.httpex);
list=(ListView)findViewById(R.id.list);
httpStuff = (TextView)findViewById(R.id.tvHttp);
client = new DefaultHttpClient();
new Read().execute("result");
}
public JSONObject lastSub(String username) throws ClientProtocolException, IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
url.append(username);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONObject last = new JSONObject(data);
//JSONObject last = new JSONObject(data).getJSONArray("result").getJSONObject(0).getJSONObject("problem");
JSONArray array = new JSONObject(data).getJSONArray("result");
String n1 = System.getProperty("line.separator");
for (int k = 0; k < array.length(); k++) {
last = array.getJSONObject(k).getJSONObject("problem");
JSONObject v = array.getJSONObject(k);
if (v.getString("verdict").contentEquals("OK")) {
HashMap<String, String> d = new HashMap<String, String>();
d.put("NAME",last.getString("name"));
d.put("URL","http://codeforces.com/problemset/problem/"+last.getString("contestId")+"/"+last.getString("index"));
if(!problemdata.contains(d)) {
m = m.concat(last.getString("name")).concat(n1); //m+=last.getString("name")+"\r\n";
problemdata.add(d);
}
}
}
return last;
} else {
Toast.makeText(Http.this, "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
json = lastSub("avm12&from=1&count=100");
return m;
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
httpStuff.setText(result);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//get the url from the invisible TextView ad opens it on the default browser
TextView t=(TextView)view.findViewById(R.id.pUrl);
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(t.getText().toString())));
}
});
ListAdapter adapter = new SimpleAdapter(
Http.this, problemdata,
R.layout.list_item, new String[] { "NAME", "URL" }, new int[] { R.id.pTitle,
R.id.pUrl});
list.setAdapter(adapter);
}
}
}

error type mismatch asynctask in android

I'm trying to retrieve data from mysql using asynctask. But I got this
" Type mismatch: cannot convert from AsyncTask
to String"
Though the return from the asynctask process is already string
Here's my codes
public void tampilkanPenyakit() {
try {
String nama = URLEncoder.encode(username, "utf-8");
urltampil += "?" + "&nama=" + nama;
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
xResult = getRequestTampil(urltampil);
try {
parse();
} catch (Exception e) {
e.printStackTrace();
}
}
class ProsesTampil extends AsyncTask<String, Void, String>{
#Override
protected String doInBackground(String... params) {
String sret = "";
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(params[0]);
try{
HttpResponse response = client.execute(request);
sret = EditPenyakit.request(response);
}catch(Exception ex){
}
return sret;
// TODO Auto-generated method stub
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
}
public String getRequestTampil(String UrlTampil){
String sret="";
sret= new ProsesTampil().execute(UrlTampil);
return sret;
}
private void parse() throws Exception {
//jObject = new JSONObject(xResult);
jObject = new JSONObject(xResult);
String sret = "";
JSONArray menuitemArray = jObject.getJSONArray("food");
cb_menu1 = (CheckBox) findViewById(R.id.cb_menu1);
cb_menu2 = (CheckBox) findViewById(R.id.cb_menu2);
cb_menu3 = (CheckBox) findViewById(R.id.cb_menu3);
for (int i = 0; i < menuitemArray.length(); i++) {
sret =menuitemArray.getJSONObject(i).getString(
"penyakit").toString();
System.out.println(sret);
if (sret.equals("1")){
cb_menu1.setChecked(true);
}
else if (sret.equals("2")){
cb_menu2.setChecked(true);
}
}
}
Any help would be appreciated. thanks

The AsyncTask execute() method return the Asyntask itself, you cannot convert it to String.
You need to handle the result in the onPostExecute() method.
Other option could be use the AsynTask get method :
sret= new ProsesTampil().execute(UrlTampil).get();
Take in account the doc:
Waits if necessary for the computation to complete, and then retrieves its result.

Android Load JSON and Passing Data to View

Guys
I Am Trying Getting JSONData to ListView
it's Works fine,, but the problem is i Want pass the json data for each row to next view
Here's, My JSON Class
public class GetJSON extends AsyncTask<String, Void, ArrayList<JSONFields>> {
#Override
protected ArrayList<JSONFields> doInBackground(String... params) {
// TODO Auto-generated method stub
try {
String url = params[0];
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
HttpResponse response;
response = client.execute(get);
InputStream content = response.getEntity().getContent();
BufferedReader reader;
reader = new BufferedReader(new InputStreamReader(content));
String line;
String json = "";
while ((line = reader.readLine()) != null) {
json += line;
}
JSONArray array = new JSONArray(json);
ArrayList<JSONFields> alData = new ArrayList<JSONFields>();
for (int i = 0; i < array.length(); i++) {
obj = array.getJSONObject(i);
data = new JSONFields();
data.setID(obj.getString("id"));
data.setTitle(obj.getString("title"));
data.setImage(obj.getString("image"));
data.setYoutube(obj.getString("youtube"));
data.setLength(obj.getString("length"));
alData.add(data);
}
System.out.println("Data returned sucessfully");
return alData;
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(ArrayList<JSONFields> result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
CustomAdapter adapter = new CustomAdapter(MainApp.this, result);
listview.setAdapter(adapter);
}
}
and I have Create Class for Holding JSON Data Fields
here it is
public class JSONFields {
private String id;
private String title;
public String getID() {
return id;
}
public void setID(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
but when I pass with this code
String thetitle = data.getTitle();
Intent showView = new Intent(MainApp.this, Show.class);
showView.putExtra("title", thetitle);
startActivity(showView);
I get only the last row info..
that's my problem
I want if I clicked the row 5 see the attr of row 5 in show View
I am new to Java and android
and I think I should add the position to getTitle(position)
when getting< because in iOS dev, I pass the data of array objectAtIndex:int to NSDic
that's all
but here< I don't know
Thanks in advance

You can use onItemClickListener to get the position of clicked view,
And than you can get the same object from the list or from array which you have set to adapter.

populating listview through a fragment

I have a class extending listFragment. I have written code for fetching json response in a method which is called in oncreate of the class. For fetching json in background I have created new inner class which extends asyncTask. I can get the jsonarrays and strings in the json response in the logcat. But when I try to save them in a string array and pass them my custom baseadapter, I get a nullpointer exception.
public class OnlineInfo extends ListFragment {
public static String result;
public String[] Technologies1;
public String[] TechnologyDescription1;
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
}
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
downloadjsonresponse();
}
public class Download extends AsyncTask<String, Void, String>
{
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
StringBuilder stringbuilder = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpGet url = new HttpGet(params[0]);
try
{
Log.d("in background", "in background");
HttpResponse response = client.execute(url);
HttpEntity entity = response.getEntity();
InputStream stream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
String line ;
while((line = reader.readLine()) != null)
{
stringbuilder.append(line);
}
}
catch(ClientProtocolException e)
{
Log.d("error in clientprotocol", "error");
e.printStackTrace();
}
catch(IOException e)
{
Log.d("error in IO", "error");
e.printStackTrace();
}
return stringbuilder.toString();
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
OnlineInfo.result = result;
try {
JSONObject jsonobject = new JSONObject(result);
JSONArray raja = jsonobject.getJSONArray("Technologies");
//String raja = jsonobject.getJSONArray("Technologies").getJSONObject(0).getString("desc");
//Log.d("desc:", raja);
for(int i=0; i<raja.length();i++)
{
Technologies1[i] = raja.getJSONObject(i).getString("name");
TechnologyDescription1[i] = raja.getJSONObject(i).getString("desc");
Log.d("technology :", raja.getJSONObject(i).getString("name"));
Log.d("technologydescription :", raja.getJSONObject(i).getString("desc"));
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.d("desc:", "error");
}
getListView().setAdapter(new AdapterForOnlineInfo(getActivity(), OnlineInfo.this.Technologies1, OnlineInfo.this.TechnologyDescription1));
}
}
public void downloadjsonresponse()
{
Download jsonresponse = new Download();
jsonresponse.execute("http://www.avantajsoftwares.com/result.json");
}
}
I could get the results in logcat whenever I comment these two lines in for-loop:
Technologies1[i] = raja.getJSONObject(i).getString("name");
TechnologyDescription1[i] = raja.getJSONObject(i).getString("desc");
Don't know what's going wrong. Please somebody provide me some insight....:-(

I think you need to allocate space in your string arrays to hold the new strings.
Just before your for loop, try putting something like this:
Technologies1 = new String[raja.length()];
TechnologyDescription1 = new String[raja.length()];

Parsing Google Shopping Json Search Results

After a few weeks of trying numerous examples found here and it seems throughout the web, I'm stumped. I can retrieve the desired search results from Google Shopping just fine:
{ "items": [ { "product": {
"title": "The Doctor's BrushPicks Toothpicks 250 Pack",
"brand": "The Doctor's" } } ] }
My problem is that I have the data sitting in a string, how do I extract the two values (title,brand) in order to use them elsewhere in the program?
Here is the class in question:
public class HttpExample extends Activity {
TextView httpStuff;
DefaultHttpClient client;
JSONObject json;
final static String URL = "https://www.googleapis.com/shopping/search...";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.httpex);
httpStuff = (TextView) findViewById(R.id.tvHttp);
client = new DefaultHttpClient();
new Read().execute("items");
}
public JSONObject products(String upc) throws ClientProtocolException, IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
url.append(upc);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONObject timeline = new JSONObject(data);
return timeline;
} else {
Toast.makeText(HttpExample.this, "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
String upc = ExportMenuActivity.upc;
json = products(upc);
return json.getString(params[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result){
httpStuff.setText(result);
}
}
}
The output of httpStuff.setText(result):
[{"product":{"brand":"The Doctor's, "title":"The Doctor's..."}}]

A solution that'd work on all versions of Android would look something like this:
JSONObject products = products(jsonStr);
JSONArray itemArray = products.getJSONArray("items");
for(int i=0; i<itemArray.length(); i++) {
if(itemArray.isNull(i) == false) {
JSONObject item = itemArray.getJSONObject(i);
String title = item.getString("title");
String brand = item.getString("brand");
}
}
JsonReader is nice, but is only available in API 10 and up. So it might or might not work for you.

You should use a JsonReader for reading the json string. Its very easy and well documented with very good sample.. here

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Parsing multiple JSON strings - android

Related

How to make elements(dynamic) obtained as JSON response, clickable in Android and connecting them to some web link?

error type mismatch asynctask in android

Android Load JSON and Passing Data to View

populating listview through a fragment

Parsing Google Shopping Json Search Results

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