Develop Reference

JSON ListView filter not working

So I've got a project to make a simple job board app. I've retrieved my JSON data and have it displaying on my app but I want to be able to use a SearchView filter but I don't know how to access my SimpleAdapter from outside of an inner-class
Here is my code:
public class jobcategories extends Activity{
private TextView jobData;
private ProgressDialog myprocessingdialog;
ArrayAdapter<String> adapter;
ArrayList<HashMap<String, String>> jobList;
private ListView lv;
private SearchView sv;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.jobcategories);
myprocessingdialog = new ProgressDialog(this);
jobList = new ArrayList<>();
lv = (ListView) findViewById(R.id.list);
sv = (SearchView) findViewById(R.id.search);
sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String text) {
return false;
}
#Override
public boolean onQueryTextChange(String text) {
adapter.getFilter().filter(text);
return false;
}
});
new JSONTask().execute("https://apidata.com");
}
public class JSONTask extends AsyncTask<String,String, String>{
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
//Showing Progress dialogue
myprocessingdialog.setTitle("Please Wait..");
myprocessingdialog.setMessage("Loading");
myprocessingdialog.setCancelable(false);
myprocessingdialog.setIndeterminate(false);
myprocessingdialog.show();
}
#Override
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try{
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line = "";
while((line = reader.readLine()) != null){
buffer.append(line);
}
String finalJson = buffer.toString();
JSONArray parentObject = new JSONArray(finalJson);
for (int i=0; i < parentObject.length(); i++) {
JSONObject job = parentObject.getJSONObject(i);
String JobTitle = job.getString("title");
String JobLocation = job.getString("location");
String finalTitle = JobTitle + " in " + JobLocation;
String JobCompany = "advert by "+job.getString("company");
String JobDescription = job.getString("description");
String JobApply = "How to Apply: " + job.getString("apply");
HashMap<String, String> jobs = new HashMap<>();
jobs.put("title", finalTitle);
jobs.put("company", JobCompany);
jobs.put("description", JobDescription);
jobs.put("apply", JobApply);
jobList.add(jobs);
}
}catch (MalformedURLException e){
Toast.makeText(getApplicationContext(), "Error...the job server is down..." + e.toString(), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), "error parsing..." + e.toString(), Toast.LENGTH_LONG).show();
} finally {
if(connection != null) {
connection.disconnect();
}
try {
if(reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(String results) {
super.onPostExecute(results);
myprocessingdialog.cancel();
ListAdapter adapter = new SimpleAdapter(
jobcategories.this, jobList,
R.layout.list_item, new String[]{"title", "company", "description", "apply"},
new int[]{R.id.title, R.id.company, R.id.description, R.id.apply});
lv.setAdapter(adapter);
}
}
}
Any help would be appreciated, am pretty new to android so if there is a better way for me to filter the data then I am open to changing the code.

Create an interface called OnJsonResultListener like so:
public interface OnJsonResultListener {
void onResult(String result);
}
Then make your Activity/Fragment implement that interface and do whatever with your simple adapter and the result from there. Then make the AsyncTask take a OnJsonResultListener in the constructor. Then in the onPostExecute method, call listener.onResult(results);
This is a simple way of making a callback.

Parsing data or executing data Errror

I have this application the app bring data from database and store it in a list view then every record have a history i want when i click on the record in the ListView to show me the history of that record. for now i made it when i click on a record then click find id button it will give me the id of the record then i will click History to clear this ListView and showing the history of this record on the same ListView.
Screen Shot for the app1 ,
Screen Shot for the app2
Any one Can help me, my app run but when i want to show the history it don't pass this (if) i don't know why
#Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
if(integer == 1){
ArrayAdapter<String > adapter= new ArrayAdapter<String>(c,android.R.layout.simple_list_item_1, patients );
lv.setAdapter(null);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Snackbar.make(view,patients.get(i), Snackbar.LENGTH_SHORT).show();
}
});
}else{
Toast.makeText(c,"Unable to parse data", Toast.LENGTH_SHORT).show();
}
progressDialog.dismiss();
}
the PHP side
<?php
$host='127.0.0.1';
$username='root';
$password='';
$database='app';
$con =mysqli_connect($host, $username, $password, $database) or die ('unable to connect');
if (mysqli_connect_error($con))
{
echo "Failed to connect to Database ".mysqli_connect_error();
}
$patientID = $_GET['patientID'];
$query= mysqli_query($con, "SELECT * FROM history where
patientID='$patientID' ");
if ($query)
{
while ($row = mysqli_fetch_array($query))
{
$flag[]= $row;
}
print(json_encode($flag));
}
mysqli_close($con);
?>
HistoryDownloader Java Class
public class HistoryDownloader extends AsyncTask<Void, Integer, String> {
Context c;
String address;
ListView lv;
ProgressDialog progressDialog;
public HistoryDownloader(Context c, String address, ListView lv) {
this.c = c;
this.address = address;
this.lv = lv;
}
//Before the job start
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog= new ProgressDialog(c);
progressDialog.setTitle("Fetch Data");
progressDialog.setMessage("Fetching data .... Please wait ");
progressDialog.show();
}
#Override
protected String doInBackground(Void... strings) {
String data= downloadData();
return data;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
progressDialog.dismiss();
if (s != null){
HistoryParser h= new HistoryParser(c,lv,s);
h.execute();
}else{
Toast.makeText(c, "Unable to download data ", Toast.LENGTH_SHORT).show();
}
}
private String downloadData(){
//connect and get a stream
InputStream is= null;
String line =null;
try{
URL url = new URL(address);
HttpURLConnection con= (HttpURLConnection) url.openConnection();
is =new BufferedInputStream( con.getInputStream());
BufferedReader br= new BufferedReader(new InputStreamReader(is));
StringBuffer sb= new StringBuffer() ;
if(br !=null){
while((line=br.readLine()) !=null){
sb.append(line+"\n");
}
}
else{
return null;
}
return sb.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if (is != null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
}
HistoryParser java Class
public class HistoryParser extends AsyncTask<Void, Integer, Integer> {
String lls;
Context c;
ListView lv;
String data;
ArrayList<String > patients= new ArrayList<>();
ProgressDialog progressDialog;
public HistoryParser (Context c, ListView lv, String data) {
this.c = c;
this.lv = lv;
this.data = data;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog= new ProgressDialog(c);
progressDialog.setTitle("Parser");
progressDialog.setMessage("Parsing the data ... please wait");
progressDialog.show();
}
#Override
protected Integer doInBackground(Void... voids) {
return this.histoParse();
}
#Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
if(integer == 1){
ArrayAdapter<String > adapter= new ArrayAdapter<String>(c,android.R.layout.simple_list_item_1, patients );
lv.setAdapter(null);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Snackbar.make(view,patients.get(i), Snackbar.LENGTH_SHORT).show();
}
});
}else{
Toast.makeText(c,"Unable to parse data", Toast.LENGTH_SHORT).show();
}
progressDialog.dismiss();
}
// parse the reciv
private int histoParse (){
try {
//adding the data to json aray first
JSONArray js= new JSONArray(data);
//create json object to hold a singel item
JSONObject jo= null;
patients.clear();
// loop the array
for(int i=0 ;i<js.length();i++){
jo= js.getJSONObject(i);
//retriving the name
//TODO: write the strring depend on the column name in the database
// write the strring depend on the column name in the database
String case1=jo.getString("case1");
/* String case2=jo.getString("case2");
String case3=jo.getString("Case3");
String case4=jo.getString("Case4");
String case5=jo.getString("Case5");
String case6=jo.getString("Case6");
String case7=jo.getString("Case7");
String case8=jo.getString("Case8");
String case9=jo.getString("Case9");
String case10=jo.getString("Case10");
String trt1=jo.getString("trt1");
String trt2=jo.getString("trt2");
String trt3=jo.getString("trt3");
String trt4=jo.getString("trt4");
String trt5=jo.getString("trt5");
String trt6=jo.getString("trt6");
String trt7=jo.getString("trt7");
String trt8=jo.getString("trt8");
String trt9=jo.getString("trt9");
String trt10=jo.getString("trt10");
//add it to our array list
patients.add("Patient History");
patients.add("");
patients.add("Cases");
patients.add("");
*/ patients.add(case1);
/* patients.add(case2);
players.add(case3);
players.add(case4);
players.add(case5);
players.add(case6);
players.add(case7);
players.add(case8);
players.add(case9);
players.add(case10);
players.add("");
players.add("Treatments");
players.add("");
players.add(trt1);
players.add(trt2);
players.add(trt3);
players.add(trt4);
players.add(trt5);
players.add(trt6);
players.add(trt7);
players.add(trt8);
players.add(trt9);
players.add(trt10);
*/
}
return 1;
} catch (JSONException e) {
e.printStackTrace();
}
return 0;
}
}
Main Class Java
public class MainActivity extends AppCompatActivity {
Context context;
String url="http://10.0.2.2/Android/Fetch.php";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
final TextView textView= (TextView) findViewById(R.id.textView);
final ListView lv=(ListView) findViewById(R.id.lv);
final Downloader d= new Downloader(this,url,lv);
String urlHistory="http://10.0.2.2/Android/History.php?patientID="+textView.getText().toString().trim();
final HistoryDownloader dd= new HistoryDownloader(this,urlHistory,lv);
final Button btn= (Button ) findViewById(R.id.button);
final Button btn2=(Button) findViewById(R.id.button2);
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
lv.setAdapter(null);
//String kk=textView.getText().toString().trim();
dd.execute();
if(textView.getText() != ""){
}else{
}
}
});

i did not use Transmitting Network Data Volley thats why im getting :)

I am trying to show data using api . but data is not showing in custom listView . list is empty

I am trying to show data in custom listView using API
there is no error but data is not shown in custom list .i made separate
class for asyncTask ,Adapters and model.
code of asyncTask is
public class CourseOutlinesTask extends AsyncTask<String, String, String> {
ProgressDialog dialog;
Context context;
private ArrayList<CourseModel> postList = new ArrayList<CourseModel>();
private ListView listView;
private View root;
TrainerCourseAdapter adapter;
String json_string;
#Override
protected void onPreExecute() {
}
#Override
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null)
connection.disconnect();
try {
if (reader != null)
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//close process dialog
if (this.dialog != null) {
this.dialog.dismiss();
}
//parse json
try {
JSONObject jsonParse = new JSONObject(result);
JSONArray query = jsonParse.getJSONArray("courses");
for (int i = 0; i < query.length(); i++) {
try {
JSONObject jsonParser = query.getJSONObject(i);
CourseModel post = new CourseModel();
post.setId(jsonParser.getInt("id"));
post.setTitle(jsonParser.getString("title"));
post.setStatus(jsonParser.getString("status"));
post.setDescription(jsonParser.getString("description"));
System.out.println(post.getStatus()+"asdadasdad");
System.out.println(post);
postList.add(post);
TrainerCourseAdapter adapter = new TrainerCourseAdapter(context,postList);
}catch (Exception e) {
System.out.println(e);
}
// Parsing json
post.setDescription(obj.getString("description"));
// ****Handle CreationDate-Object
// Genre is json array
}
} else {
MyAppUtil.getToast(getApplicationContext(), message);
}*/
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
code of my adapter class is
public class TrainerCourseAdapter extends BaseAdapter {
private List list;
private Context context;
private static LayoutInflater inflater = null;
String [] cName;
String [] cDetail;
String [] created;
String [] cStatus;
TextView c_name,c_detail,c_date,c_status;
ArrayList<CourseModel> itemList;
Context mcontext;
public TrainerCourseAdapter(Context context,List list) {
mcontext = context;
itemList = (ArrayList<CourseModel>) list;
}
#Override
public int getCount() {
return itemList.size();
}
#Override
public Object getItem(int i) {
return i;
}
#Override
public long getItemId(int i) {
return i;
}
public void setItemList(ArrayList<CourseModel> itemList) {
this.itemList = itemList;
}
public class Holder
{
TextView c_name;
TextView c_detail;
TextView c_date ;
Button c_status;
}
#Override
public View getView(final int i, View view, ViewGroup viewGroup) {
Holder holder = new Holder();
View rowView;
rowView = inflater.inflate(R.layout.row_courses_list, viewGroup,false);
this.c_name = (TextView) rowView.findViewById(R.id.txt_courseName);
this.c_detail = (TextView) rowView.findViewById(R.id.txt_courseDetail);
this.c_date = (TextView) rowView.findViewById(R.id.txt_courseDate);
this.c_status = (Button) rowView.findViewById(R.id.btn_courseStatus);
System.out.println("Mudassir Don");
final CourseModel data = itemList.get(i);
this.c_name.setText(data.getTitle());
this.c_detail.setText(data.getDescription());
this.c_status.setText(data.getStatus());
this.c_date.setText(data.getId());
System.out.println(c_date);
rowView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(context, "You Clicked "+ cName[i], Toast.LENGTH_LONG).show();
}
});
return rowView;
}
}
code of activity is
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_course_outlines);
CourseOutlinesTask task = new CourseOutlinesTask();
task.execute("http://mantis.vu.edu.pk/bridging_the_gap/public/viewCourseOutlines");
mylist = task.viewResult();
listView = (ListView) findViewById(R.id.course_listView);
listView.setAdapter(new TrainerCourseAdapter(CourseOutlinesActivity.this,mylist ) {
});

You need to assign your custom Adapter to listView.
yourListView.setAdapter(yourAdapter);
In your case, inside onPostExecute method of CourseOutlinesTask you should write it.
TrainerCourseAdapter adapter = new TrainerCourseAdapter(context,postList);
listView = (ListView) findViewById(R.id.course_listView);
listview.setAdapter(adapter);
Hope this helps.

You need to write a interface and get response in your activity and set adapter to list view
like.
TrainerCourseAdapter adapter = new TrainerCourseAdapter(context,postList);
listView = (ListView) findViewById(R.id.course_listView);
listview.setAdapter(adapter);

You can use callBack interface to get itemArraylist data to your activity class.
After getting itemlist data in activity class you can set adapter to listview.
TrainerCourseAdapter adapter = new TrainerCourseAdapter(context, postList);
listView = (ListView) findViewById(R.id.course_listView);
listview.setAdapter(adapter);
// You can create interface in your CourseOutlinesClass with two method onSuccess() and onFailure() and in onPostExecute() send arraylist data using this interface to activity , then set adapter to fill data in listview.

Use the below code:-
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_course_outlines);
listView = (ListView) findViewById(R.id.course_listView);
new CourseOutlinesTask().execute("http://mantis.vu.edu.pk/bridging_the_gap/public/viewCourseOutlines");
}
and in postExecute of your AsyncTask setAdapter to listView
TrainerCourseAdapter adapter = new TrainerCourseAdapter(context,postList);
listView.setAdapter(adapter);

Why JSON parser not working on Android?

I have an app which downloads YouTube JSON data. The code works perfectly in a desktop app, but not in android (the list is null when trying to iterate through it). Here's my code which matters:
public String DownloadJSONData(){
BufferedReader reader = null;
String webc = "";
try{
URL url = new URL("http://gdata.youtube.com/feeds/api/users/thecovery/uploads?v=2&alt=json");
reader = new BufferedReader(new InputStreamReader(url.openStream()));
StringBuffer buffer = new StringBuffer();
int read;
char[] chars = new char[1024];
while((read = reader.read(chars)) != -1){
buffer.append(chars,0,read);
}
webc = buffer.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
return webc;
} catch (IOException e) {
e.printStackTrace();
}
}
}
System.out.println(webc);
return webc;
}
public void GetData() throws JSONException {
JSONObject obj = new JSONObject(DownloadJSONData());
JSONArray feed = obj.getJSONObject("feed").getJSONArray("entry");
for(int i = 0; i < feed.length(); i++){
EPISODE_NAME.add(feed.getJSONObject(i).getJSONObject("title").getString("$t"));
EPISODE_LINK.add(feed.getJSONObject(i).getJSONArray("link").getJSONObject(0).getString("href"));
}
ListView episodes = (ListView) findViewById(R.id.episodeChooser);
ArrayAdapter<String> episodesSource = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,EPISODE_NAME);
}
}
In the onCreate method, I call the GetData() method, and I try to set the adapter to the ListView from the EPISODE_NAME ArrayList, but it's null. I also tried to set the adapter after the method, in onCreate, but no luck. Anyone can help?

It works fine
Add Below permission in Manifest.xml
<uses-permission android:name="android.permission.INTERNET"/>
ManiActivity.java
public class MainActivity extends Activity {
private ListView listView;
private List<FeedsDTO> feedsList = new ArrayList<FeedsDTO>();
private FeedsDTO dto = null;
private BackgroundThread backgroundThread;
private CustomAdapter customAdapter = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listview);
backgroundThread = new BackgroundThread();
backgroundThread.execute();
}
private void setListViewAdapter(){
customAdapter = new CustomAdapter(this, R.layout.listitem, feedsList);
listView.setAdapter(customAdapter);
}
private class BackgroundThread extends AsyncTask<Void, Void, String> {
private ProgressDialog progressBar = null;
#Override
protected void onPreExecute() {
super.onPreExecute();
progressBar = new ProgressDialog(MainActivity.this);
progressBar.setCancelable(false);
progressBar.show();
}
#Override
protected String doInBackground(Void... params) {
BufferedReader reader = null;
String webc = "";
try{
URL url = new URL("http://gdata.youtube.com/feeds/api/users/thecovery/uploads?v=2&alt=json");
reader = new BufferedReader(new InputStreamReader(url.openStream()));
StringBuffer buffer = new StringBuffer();
int read;
char[] chars = new char[1024];
while((read = reader.read(chars)) != -1){
buffer.append(chars,0,read);
}
webc = buffer.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
return webc;
} catch (IOException e) {
e.printStackTrace();
}
}
}
System.out.println(webc);
return webc;
}
#Override
protected void onPostExecute(String result) {
JSONObject obj;
try {
obj = new JSONObject(result);
JSONArray feed = obj.getJSONObject("feed").getJSONArray("entry");
Log.i("=======", "========="+feed.length());
for(int i = 0; i < feed.length(); i++){
dto = new FeedsDTO();
dto.setName(feed.getJSONObject(i).getJSONObject("title").getString("$t"));
dto.setLink(feed.getJSONObject(i).getJSONArray("link").getJSONObject(0).getString("href"));
feedsList.add(dto);
dto = null;
}
Log.i("=======LIst Size", "========="+feedsList.size());
progressBar.dismiss();
setListViewAdapter();
} catch (JSONException e) {
e.printStackTrace();
}
super.onPostExecute(result);
}
}
}
CustomAdapter.java
public class CustomAdapter extends ArrayAdapter<FeedsDTO>{
private LayoutInflater inflater;
private int layoutID;
public CustomAdapter(Context cntx, int resource, List<FeedsDTO> objects) {
super(cntx, resource, objects);
this.inflater =(LayoutInflater) cntx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.layoutID = resource;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
try {
ViewHolder holder = null;
if (convertView == null) {
convertView = inflater.inflate(layoutID, null);
holder = new ViewHolder();
holder.NameTV = (TextView) convertView.findViewById(R.id.textview);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
FeedsDTO feedsDTO = getItem(position);
holder.NameTV.setText(feedsDTO.getName());
feedsDTO = null;
} catch (Exception e) {
e.printStackTrace();
}
return convertView;
}
private class ViewHolder{
TextView NameTV;
}
}
FeedsDTO.java
public class FeedsDTO {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
private String link;
}
listitem.xlm:-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/textview"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</TextView>
I hope this code will work perfectly

Most apps include several different activities that allow the user to
perform different actions. Whether an activity is the main activity
that's created when the user clicks your app icon or a different
activity that your app starts in response to a user action, the system
creates every new instance of Activity by calling its onCreate()
method.
You must implement the onCreate() method to perform basic application
startup logic that should happen only once for the entire life of the
activity. For example, your implementation of onCreate() should define
the user interface and possibly instantiate some class-scope
variables.
For example, the following example of the onCreate() method shows some
code that performs some fundamental setup for the activity, such as
declaring the user interface (defined in an XML layout file), defining
member variables, and configuring some of the UI.
You are basically mixing stuff left and right. First create your Interface in the onCreate() and do the logic in onStart().
You should read the android lifecycle. See here

Fragment Tabs not Appearing

In my program i am showing multilevel Listview, but whenever i am calling another Activity then Fragment Tabs are not appearing.
I am using this great tutorial: http://www.androidbegin.com/tutorial/android-actionbarsherlock-viewpager-tabs-tutorial/
See below Images, 1st Level ListView:
2nd Level ListView:
ListCategoryFragment.xml:-
public class ListCategoryFragment extends SherlockFragment implements OnItemClickListener {
ListView lview3;
ListCategoryAdapter adapter;
private ArrayList<Object> itemList;
private ItemBean bean;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab1.xml
View view = inflater.inflate(R.layout.fragment_category_tab, container, false);
prepareArrayList();
lview3 = (ListView) view.findViewById(R.id.listView1);
adapter = new ListCategoryAdapter(getActivity(), itemList);
lview3.setAdapter(adapter);
lview3.setOnItemClickListener(this);
return view;
}
private static final int categoryFirst = 0;
private static final int categorySecond = 1;
private static final int categoryThird = 2;
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// Set up different intents based on the item clicked:
switch (position)
{
case categoryFirst:
Intent intent1 = new Intent(getActivity(), ListItemActivity.class);
intent1.putExtra("category", "Category - 1");
startActivity(intent1);
break;
case categorySecond:
Intent intent2 = new Intent(getActivity(), ListItemActivity.class);
intent2.putExtra("category", "Category - 2");
startActivity(intent2);
break;
case categoryThird:
Intent intent3 = new Intent(getActivity(), ListItemActivity.class);
intent3.putExtra("category", "Category - 3");
startActivity(intent3);
break;
default:
break;
}
}
public void prepareArrayList()
{
itemList = new ArrayList<Object>();
AddObjectToList("Category - 1");
AddObjectToList("Category - 2");
AddObjectToList("Category - 3");
}
// Add one item into the Array List
public void AddObjectToList(String title)
{
bean = new ItemBean();
bean.setTitle(title);
itemList.add(bean);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
}
}
ListItemActivity.java:-
public class ListItemActivity extends SherlockFragmentActivity {
static String URL = "http://www.site.url/tone.json";
static String KEY_CATEGORY = "item";
static final String KEY_TITLE = "title";
ListView list;
ListItemAdapter adapter;
/** Called when the activity is first created. */
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
getActionBar().setDisplayHomeAsUpEnabled(true);
setContentView(R.layout.activity_item_list);
final ArrayList<HashMap<String, String>> itemsList = new ArrayList<HashMap<String, String>>();
list = (ListView) findViewById(R.id.listView1);
adapter = new ListItemAdapter(this, itemsList);
list.setAdapter(adapter);
Bundle bdl = getIntent().getExtras();
KEY_CATEGORY = bdl.getString("category");
if (isNetworkAvailable()) {
new MyAsyncTask().execute();
} else {
AlertDialog alertDialog = new AlertDialog.Builder(ListItemActivity.this).create();
alertDialog.setMessage("The Internet connection appears to be offline.");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
private Intent getDefaultShareIntent(){
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "SUBJECT");
intent.putExtra(Intent.EXTRA_TEXT, "TEXT");
startActivity(Intent.createChooser(intent, "Share via"));
return intent;
}
/** The event listener for the Up navigation selection */
#Override
public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
switch(item.getItemId())
{
case android.R.id.home:
finish();
break;
case R.id.menu_item_share:
getDefaultShareIntent();
break;
}
return true;
}
private boolean isNetworkAvailable() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
return (info != null);
}
class MyAsyncTask extends
AsyncTask<String, Integer, ArrayList<HashMap<String, String>>> {
private ProgressDialog progressDialog = new ProgressDialog(
ListItemActivity.this);
#Override
protected void onPreExecute() {
progressDialog.setMessage("Loading, Please wait.....");
progressDialog.show();
}
final ArrayList<HashMap<String, String>> itemsList = new ArrayList<HashMap<String, String>>();
#Override
protected ArrayList<HashMap<String, String>> doInBackground(
String... params) {
HttpClient client = new DefaultHttpClient();
// Perform a GET request for a JSON list
HttpUriRequest request = new HttpGet(URL);
// 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(KEY_CATEGORY);
for (int i = 0; i < jsonArray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsonObject = jsonArray.getJSONObject(i);
map.put("id", String.valueOf(i));
map.put(KEY_TITLE, jsonObject.getString(KEY_TITLE));
itemsList.add(map);
}
return itemsList;
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return null;
}
#Override
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
list = (ListView) findViewById(R.id.listView1);
adapter = new ListItemAdapter(ListItemActivity.this, itemsList);
list.setAdapter(adapter);
TextView lblTitle = (TextView) findViewById(R.id.text);
lblTitle.setText(KEY_CATEGORY);
this.progressDialog.dismiss();
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
HashMap<String, String> map = itemsList.get(position);
Intent in = new Intent(ListItemActivity.this, ListItemDetailActivity.class);
in.putExtra(KEY_TITLE, map.get(KEY_TITLE));
startActivity(in);
}
});
}
}
}

This is the normal behavior because you are moving from the Fragment Activity to a normal Activity. But only your first activity has the tabs.
The correct way of doing this is to remove the intents and the new activities. Instead it should be replaced with fragments itself.
For example, in the list item click, stop calling the Intent to the new fragment activity, and replace it calling a fragment itself.
There will be only one Activity and that will be the one which is holding the tabs and all others should be fragments. You just need to replace the fragments from within the same activity.