Develop Reference

Searching a JSON data in Android using ListView

I am trying to search a JSON data fetched from a URL, but whenever the user types a search string the application crashes. How do I fix it?
Here is my code:
MainActivity.java
public class MainActivity extends AppCompatActivity {
private String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
private ListView lv;
private EditText filterText;
private ArrayAdapter<String> listAdapter;
// URL to get contacts JSON
private static String url = "http://210.213.86.195:14344/inventory/getallitemname";
ArrayList<HashMap<String, String>> itemList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
filterText = (EditText)findViewById(R.id.editText);
itemList = new ArrayList<>();
lv = (ListView) findViewById(R.id.list_item);
new GetItems().execute();
filterText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
MainActivity.this.listAdapter.getFilter().filter(s);
}
#Override
public void afterTextChanged(Editable s) {
}
}
);
}
/**
* Async task class to get json by making HTTP call
*/
private class GetItems 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 items = jsonObj.getJSONArray("Data");
// looping through All Contacts
for (int i = 0; i < items.length(); i++) {
JSONObject c = items.getJSONObject(i);
String ItemCode = c.getString("ItemCode");
String ItemName = c.getString("ItemName");
// tmp hash map for single item
HashMap<String, String> item = new HashMap<>();
// adding each child node to HashMap key => value
item.put("ItemCode", ItemCode);
item.put("ItemName", ItemName);
// adding item to item list
itemList.add(item);
}
} 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, itemList,
R.layout.list_item, new String[]{"ItemCode", "ItemName"}, new int[]{R.id.ItemCode,
R.id.ItemName});
lv.setAdapter(adapter);
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jsonparser.MainActivity">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/editText"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<ListView
android:id="#+id/list_item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:layout_marginTop="10dp"
android:layout_below="#+id/editText"
android:layout_alignLeft="#+id/editText"
android:layout_alignStart="#+id/editText" />
</RelativeLayout>
list_item.xml
<?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="wrap_content"
android:orientation="vertical"
android:padding="#dimen/activity_horizontal_margin">
<TextView
android:id="#+id/ItemName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#color/colorPrimaryDark"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="#+id/ItemCode"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:textColor="#color/colorAccent" />
</LinearLayout>

you have not initalized it anywhere in code:-
MainActivity.this.listAdapter
so default is null,in postExecute you are using local adapter variable.

Put
adapter = new ArrayAdapter<String>(this,
R.layout.list_view_rows, R.id.listview, ListofStringYouWantToDisplay);
below
lv = (ListView) findViewById(R.id.list_item);
hear - ListofStringYouWantToDisplay is String[] or ArrayList you want to display
Your problem is you not initializing adapter before use

setOnItemSelectedListener not being called?

I'm new to Android and was working on my first app. I was trying to parse the contents of a Google Sheets spreadsheets, specifically a list of names into a Spinner. I've done so successfully by using an ArrayAdapter with an ArrayList as I can see the options when I expand the Spinner. The problem I'm facing is that the Spinner doesn't show the currently selected item when one is selected. If you try to run my code, you'll see that if you try to click the submit Button, it'll tell you that null is being selected, so I've narrowed down my problem to the currently selected name String not being selected.
Here is my MainActivity class:
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
ArrayList<String> names = new ArrayList<String>();
Spinner spBusinessType;
Button btnsubmit;
ArrayAdapter<String> adapterBusinessType;
String sbusinesstype;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spBusinessType = (Spinner) findViewById(R.id.spBussinessType);
btnsubmit=(Button)findViewById(R.id.submit);
btnsubmit.setOnClickListener(this);
new DownloadWebpageTask(new AsyncResult() {
#Override
public void onResult(JSONObject object) {
processJson(object);
}
}).execute("https://spreadsheets.google.com/tq?key=1JKU2Vt_gMNUYYALct4m9xElLdpGlQ3N4uhS9qFRzxOQ");
adapterBusinessType = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, names);
adapterBusinessType.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spBusinessType.setAdapter(adapterBusinessType);
spBusinessType.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapter, View v,
int position, long id) {
// On selecting a spinner item
sbusinesstype = adapter.getItemAtPosition(position).toString();
System.out.println(sbusinesstype);
// Showing selected spinner item
Toast.makeText(getApplicationContext(),
"Bussiness Type : " + sbusinesstype, Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "You have selected " + sbusinesstype,Toast.LENGTH_SHORT).show();
}
private void processJson(JSONObject object) {
try {
JSONArray rows = object.getJSONArray("rows");
for (int r = 0; r < rows.length(); ++r) {
JSONObject row = rows.getJSONObject(r);
JSONArray columns = row.getJSONArray("c");
String name = columns.getJSONObject(0).getString("v");
names.add(name);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
the AsyncResult interface I'm using to obtain a JSON object from Google Sheets:
public interface AsyncResult
{
void onResult(JSONObject object);
}
the DownloadWebpageTask class that is obtaining and parsing the JSON object:
public class DownloadWebpageTask extends AsyncTask<String, Void, String> {
AsyncResult callback;
public DownloadWebpageTask(AsyncResult callback) {
this.callback = callback;
}
#Override
protected String doInBackground(String... urls) {
// params comes from the execute() call: params[0] is the url.
try {
return downloadUrl(urls[0]);
} catch (IOException e) {
return "Unable to download the requested page.";
}
}
// onPostExecute displays the results of the AsyncTask.
#Override
protected void onPostExecute(String result) {
// remove the unnecessary parts from the response and construct a JSON
int start = result.indexOf("{", result.indexOf("{") + 1);
int end = result.lastIndexOf("}");
String jsonResponse = result.substring(start, end);
try {
JSONObject table = new JSONObject(jsonResponse);
callback.onResult(table);
} catch (JSONException e) {
e.printStackTrace();
}
}
private String downloadUrl(String urlString) throws IOException {
InputStream is = null;
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
// Starts the query
conn.connect();
int responseCode = conn.getResponseCode();
is = conn.getInputStream();
String contentAsString = convertStreamToString(is);
return contentAsString;
} finally {
if (is != null) {
is.close();
}
}
}
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();
}
the activity_main layout file:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".MainActivity">
<include layout="#layout/content_main" />
</RelativeLayout>
and the content_main layout file that I put the Spinner in:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".MainActivity">
tools:showIn="#layout/activity_main">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Select Business Type"
android:textColor="#000000"
android:textSize="20sp" />
<Spinner
android:id="#+id/spBussinessType"
style="#style/Base.Widget.AppCompat.Spinner.Underlined"
android:layout_width="match_parent"
android:layout_height="wrap_content"></Spinner>
<Button
android:id="#+id/submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="10dp"
android:text="Submit"
android:textSize="15sp" />
</LinearLayout>
What is causing the adapter to not detect when one of the name strings is being selected? Could it be related to how I'm parsing them from the Google Sheet?

You didnt notify the ArrayAdapter that the data has changed, you originally passed empty Arraylist and upon filling the array list, you have to notifiy the Adapter that data has changed and its time for it to consider that, something like
private void processJson(JSONObject object) {
try {
JSONArray rows = object.getJSONArray("rows");
for (int r = 0; r < rows.length(); ++r) {
JSONObject row = rows.getJSONObject(r);
JSONArray columns = row.getJSONArray("c");
String name = columns.getJSONObject(0).getString("v");
names.add(name);
}
adapterBusinessType.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
That should help.

It would appear no data is being displayed in your Adapter. Nothing can be selected. Your listener code looks fine.
Put adapterBusinessType.notifyDatasetChanged() into the processJson method. Outside the catch or after you add all the data to the list.
Or... replace names.add with adapterBusinessType.add

android.view.View cannot be cast to android.support.v7.widget.RecyclerView

I'm following this tutorial http://javatechig.com/android/android-recyclerview-example
while after done coding, i'm getting one error android.view.View cannot be cast to android.support.v7.widget.RecyclerView. thanks in advance
My MainActivity.java
public class MainActivity extends AppCompatActivity {
private static final String TAG = "RecyclerViewExample";
private List<FeedItem> feedsList;
private RecyclerView mRecyclerView;
private MyRecyclerAdapter adapter;
private ProgressBar progressBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initialize recycler view
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerd_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
progressBar = (ProgressBar) findViewById(R.id.progress_bar);
progressBar.setVisibility(View.VISIBLE);
// Downloading data from below url
final String url = "http://javatechig.com/?json=get_recent_posts&count=45";
new AsyncHttpTask().execute(url);
}
public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {
#Override
protected void onPreExecute() {
setProgressBarIndeterminateVisibility(true);
}
#Override
protected Integer doInBackground(String... params) {
Integer result = 0;
HttpURLConnection urlConnection;
try {
URL url = new URL(params[0]);
urlConnection = (HttpURLConnection) url.openConnection();
int statusCode = urlConnection.getResponseCode();
// 200 represents HTTP OK
if (statusCode == 200) {
BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder response = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
response.append(line);
}
parseResult(response.toString());
result = 1; // Successful
} else {
result = 0; //"Failed to fetch data!";
}
} catch (Exception e) {
Log.d(TAG, e.getLocalizedMessage());
}
return result; //"Failed to fetch data!";
}
#Override
protected void onPostExecute(Integer result) {
// Download complete. Let us update UI
progressBar.setVisibility(View.GONE);
if (result == 1) {
adapter = new MyRecyclerAdapter(MainActivity.this, feedsList);
mRecyclerView.setAdapter(adapter);
} else {
Toast.makeText(MainActivity.this, "Failed to fetch data!", Toast.LENGTH_SHORT).show();
}
}
}
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONArray posts = response.optJSONArray("posts");
feedsList = new ArrayList<>();
for (int i = 0; i < posts.length(); i++) {
JSONObject post = posts.optJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(post.optString("title"));
item.setThumbnail(post.optString("thumbnail"));
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:class="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:id="#+id/relativ"
tools:context="com.example.ict4.recyclerviewasyntask.MainActivity">
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerd_view"
android:layout_centerInParent="true"
class="android.support.v7.widget.RecyclerView"/>
<ProgressBar
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/progress_bar"
android:layout_centerInParent="true"
/>
</RelativeLayout>

In your XML layout, change
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerd_view"
android:layout_centerInParent="true"
class="android.support.v7.widget.RecyclerView"/>
to
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/recyclerd_view"
android:layout_centerInParent="true" />

Don't get any output on TextView

I made a small app that returns the html of a website for practice. But i'm not getting the output on the textview. Here's the code:
public class MainActivity extends Activity {
TextView httpresponse;
EditText WebAddress;
String website;
Button getHtml;
HttpClient client;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebAddress = (EditText) findViewById(R.id.editText1);
//client = new DefaultHttpClient();
httpresponse = (TextView) findViewById(R.id.tvHttpStuff);
getHtml = (Button) findViewById(R.id.getHtmlBtn);
getHtml.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
website = WebAddress.getText().toString();
//httpresponse.setText(website);
//GetThatHttp http = new GetThatHttp();
String returned;
try{
returned = getInternetData();
httpresponse.setText(returned);
}catch(Exception e){
e.printStackTrace();
}
}
});
}
public String getInternetData() throws Exception{
BufferedReader buffReader=null;
String data =null;
try{
HttpClient client = new DefaultHttpClient();
URI websiteURL = new URI(website);
HttpGet request = new HttpGet();
request.setURI(websiteURL);
HttpResponse response = client.execute(request);
buffReader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer stringBuilder = new StringBuffer("");
String line = " ";
String newLine = System.getProperty("line.separator");
while((line = buffReader.readLine())!= null){
stringBuilder.append(line + newLine);
}
buffReader.close();
data = stringBuilder.toString();
return data;
}finally{
if(buffReader !=null){
try{
buffReader.close();
return data;
}catch(Exception e){
e.printStackTrace();
}
}
}
}
}
EDIT: Just added my XML file
Here is the XML file.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="#+id/tvHttpStuff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/editText1"
android:layout_marginTop="28dp"
android:layout_marginRight="20dp"
android:layout_marginLeft="20dp"
android:text="TextView" />
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/tvHttpStuff"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:ems="10"
android:hint="http://website.com" >
<requestFocus />
</EditText>
<Button
android:id="#+id/getHtmlBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/editText1"
android:layout_marginRight="20dp"
android:layout_marginLeft="20dp"
android:text="Get HTML" />
I tested it already out with a website. It still didn't work. I hope someone can help me with this.

Unless you changed it (you didn't), you can't do networking on main thread. You're probably having a NetworkOnMainThreadException, did you check the logs?
To have a cleaner code, add a callback to handle the button click:
<Button
android:id="#+id/getHtmlBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/editText1"
android:layout_marginRight="20dp"
android:layout_marginLeft="20dp"
android:text="Get HTML"
android:onClick="onClickButtonGetHtml" />
Then you need a new thread to do the networking stuff. If there's no problem with it (any exceptions calling your getInternetData()), you should use the UI thread to update your TextView. I didn't touch your getInternetData().
public class MainActivity extends Activity {
TextView httpresponse;
EditText webAddress;
String website;
HttpClient client;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webAddress = (EditText) findViewById(R.id.editText1);
httpresponse = (TextView) findViewById(R.id.tvHttpStuff);
}
public void onClickButtonGetHtml(View view) {
// get the website URL from the EditText
website = webAddress.getText().toString();
// use a new thread to do the network stuff
new Thread(new Runnable() {
#Override
public void run() {
try {
// get the HTML
final String returned = getInternetData();
// update your TextView using the UI Thread
runOnUiThread(new Runnable() {
#Override
public void run() {
httpresponse.setText(returned);
}
});
}
catch(Exception ex) { ex.printStackTrace();}
}
}).start();
}
public String getInternetData() throws Exception {
BufferedReader buffReader = null;
String data = null;
try {
HttpClient client = new DefaultHttpClient();
URI websiteURL = new URI(website);
HttpGet request = new HttpGet();
request.setURI(websiteURL);
HttpResponse response = client.execute(request);
buffReader = new BufferedReader(new InputStreamReader(response
.getEntity().getContent()));
StringBuffer stringBuilder = new StringBuffer("");
String line = " ";
String newLine = System.getProperty("line.separator");
while ((line = buffReader.readLine()) != null) {
stringBuilder.append(line + newLine);
}
buffReader.close();
data = stringBuilder.toString();
return data;
}
finally {
if (buffReader != null) {
try {
buffReader.close();
return data;
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
Edit: make sure that you have the network permission on the manifest.
<uses-permission android:name="android.permission.INTERNET"></uses-permission>

Try changing httpresponse.setText(website); for httpresponse.setText("Something"); and show if you gets the text that you writed in the output. If not you should post your layout xml file.
EDIT:
Try adding:
</RelativeLayout>
In the end of your xml file. Then clean your project and try again, maybe this layout error is causing a a bad R.java built.

How to use ChrisBanes' ActionBar-PullToRefresh library with Tab view at bottom in activity

I am trying to use Chris Banes' library Actionbar-PullToRefresh. It can be found here.
I am using Tabs at bottom of screen in my app. as you can see in screen shot.
I read through the sample code. He says that all you have to do is, wrap your refreshable view in a PullToRefreshLayout like this: How do i integrate it into my app.
public class MainActivity extends Activity implements OnTabChangeListener {
private TabHost mTabHost;
public static final String TAB_1 = "Open";
public static final String TAB_2 = "Approved";
public static final String TAB_3 = "Decline";
private int mCurrentTab;
public String result;
Vector<String> msgvector = new Vector<String>();
Vector<String> usernamevector = new Vector<String>();
Vector<String> feedIdvector = new Vector<String>();
Vector<String> userIdvector = new Vector<String>();
ListView listview,listview1,listview2;
private ProgressDialog simpleWaitDialog;
List<Rowfeeds> rowfeedlist;
public String result2;
public String result3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
listview = (ListView)findViewById(R.id.tab_1);
listview1 = (ListView)findViewById(R.id.tab_2);
listview2 = (ListView)findViewById(R.id.tab_3);
new Feedsdata().execute();
setupTabs();
mTabHost.setOnTabChangedListener(this);
mTabHost.setCurrentTab(mCurrentTab);
}
private class Feedsdata extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
Log.i("doInBackground", "doInBackground");
HttpClient hc = new DefaultHttpClient();
HttpPost postMethod = new HttpPost("http://192.168.21.74/mynetwork/formapi/top_feeds");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("from", "0"));
nameValuePairs.add(new BasicNameValuePair("to", "10"));
postMethod.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse rp = hc.execute(postMethod);
if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
result = EntityUtils.toString(rp.getEntity());
Log.v("suggestion_data", "" + result);
JSONArray jsonary = new JSONArray(result);
for (int i = 0; i < jsonary.length(); i++) {
//Log.v("jsonary.length", "" +jsonary.length());
String sr = ""+jsonary.getJSONObject(i);
//Log.v("sr", "" +sr);
JSONObject jobj = new JSONObject(sr);
Log.v("======================", "=================" );
Log.v("feed_id", "" +jobj.getString("feed_id"));
Log.v("feed_message", "" +jobj.getString("feed_message"));
Log.v("user_id", "" +jobj.getString("user_id"));
Log.v("username", "" +jobj.getString("username"));
Log.v("======================", "=================" );
msgvector.add(""+jobj.getString("feed_message").toString().trim());
usernamevector.add("" +jobj.getString("username").toString().trim());
feedIdvector.add("" +jobj.getString("feed_id").toString().trim());
userIdvector.add("" +jobj.getString("user_id").toString().trim());
}
//for (int i = 0; i < feedIdvector.size(); i++) {
//Log.v("feedIdvector", "" +feedIdvector.elementAt(i));
//}
}else{
Log.d("JSON", "StatusCode "+rp.getStatusLine().getStatusCode());
}
} catch (Exception e) {
// TODO Auto-generated catch block
Log.i("AsyncTaskException", e.toString());
}
Log.i("popularAsyncTaskException", e.toString());
}
return null;
}
#Override
protected void onPreExecute() {
Log.i("Async-Example", "onPreExecute Called");
simpleWaitDialog = ProgressDialog.show(MainActivity.this,"Wait", "Downloading feeds");
}
#Override
protected void onPostExecute(String result) {
rowfeedlist = new ArrayList<Rowfeeds>();
for (int i = 0; i < msgvector.size(); i++) {
Rowfeeds rowfeeds = new Rowfeeds(msgvector.elementAt(i),usernamevector.elementAt(i),feedIdvector.elementAt(i));
rowfeedlist.add(rowfeeds);
}
Customfeedadapter feedadapter = new Customfeedadapter(getApplicationContext(),R.layout.feeds,rowfeedlist
,feedIdvector,userIdvector);
listview.setAdapter(feedadapter);
simpleWaitDialog.dismiss();
}
private void setupTabs() {
mTabHost.setup(); // you must call this before adding your tabs!
mTabHost.addTab(newTab(TAB_1, R.id.tab_1));
mTabHost.addTab(newTab(TAB_2, R.id.tab_2));
mTabHost.addTab(newTab(TAB_3, R.id.tab_3));
}
private TabSpec newTab(String tag, int tabContentId) {
Log.i("tag", tag);//fff498
Log.i("tabContentId", ""+tabContentId);//fff498
TabSpec spec = mTabHost.newTabSpec(tag);
spec.setContent(tabContentId);
if(tag.equalsIgnoreCase("Open")){
spec.setIndicator("", getResources().getDrawable(R.drawable.feed));
spec.setContent(tabContentId);
}else if(tag.equalsIgnoreCase("Approved")){
spec.setIndicator("", getResources().getDrawable(R.drawable.trend));
spec.setContent(tabContentId);
}else if(tag.equalsIgnoreCase("Decline")){
spec.setIndicator("", getResources().getDrawable(R.drawable.popularr));
spec.setContent(tabContentId);
}
for(int i=0;i<mTabHost.getTabWidget().getChildCount();i++)
{
mTabHost.getTabWidget().getChildAt(0).setBackgroundColor(Color.parseColor("#fff498"));
}
return spec;
}
public void onTabChanged(String tabId) {
for(int i=0;i<mTabHost.getTabWidget().getChildCount();i++)
{
mTabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.WHITE);
}
if (TAB_1.equals(tabId)) {
// updateTab(R.id.tab_1);
mCurrentTab = 0;
//Toast.makeText(getApplicationContext(), "1No Guest list for Today", Toast.LENGTH_SHORT).show();
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#fff498"));
}
if (TAB_2.equals(tabId)) {
//updateTab(R.id.tab_2);
mCurrentTab = 1;
//Toast.makeText(getApplicationContext(), "2No Guest list for Today", Toast.LENGTH_SHORT).show();
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#fff498"));
//http://192.168.21.74/mynetwork/formapi/trending
//http://192.168.21.74/mynetwork/formapi/popular
}
if (TAB_3.equals(tabId)) {
//updateTab(R.id.tab_2);
mCurrentTab = 2;
// Toast.makeText(getApplicationContext(), "3No Guest list for Today", Toast.LENGTH_SHORT).show();
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#fff498"));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Xml layout:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" >
<ListView
android:id="#+id/tab_1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<ListView
android:id="#+id/tab_2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<ListView
android:id="#+id/tab_3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</FrameLayout>
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0" >
</TabWidget>
</LinearLayout>
</TabHost>

Put all your list views in PullToRefreshLayout and give R.id.tab_1 R.id.tab_2 R.id.tab_3 id's to your PullToRefreshLayout instead of ListView
<uk.co.senab.actionbarpulltorefresh.library.PullToRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tab_1"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="#+id/listview1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</uk.co.senab.actionbarpulltorefresh.library.PullToRefreshLayout>
same for rest of the listview
In java inside onCreate of the activity:
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mPullToRefreshLayout= (ListView)findViewById(R.id.tab_1);
mPullToRefreshLayout1 = (ListView)findViewById(R.id.tab_2);
mPullToRefreshLayout2 = (ListView)findViewById(R.id.tab_3);
listview = (ListView)findViewById(R.id.listview1);
listview1 = (ListView)findViewById(R.id.listview2);
listview2 = (ListView)findViewById(R.id.listview3);
ActionBarPullToRefresh.from(this)
// Mark All Children as pullable
.allChildrenArePullable()
// Set the OnRefreshListener
.listener(this)
// Finally commit the setup to our PullToRefreshLayout
.setup(mPullToRefreshLayout);
on tab change:
public void onTabChanged(String tabId) {
for(int i=0;i<mTabHost.getTabWidget().getChildCount();i++)
{
mTabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.WHITE);
}
if (TAB_1.equals(tabId)) {
// updateTab(R.id.tab_1);
mCurrentTab = 0;
//Toast.makeText(getApplicationContext(), "1No Guest list for Today", Toast.LENGTH_SHORT).show();
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#fff498"));
ActionBarPullToRefresh.from(this)
// Mark All Children as pullable
.allChildrenArePullable()
// Set the OnRefreshListener
.listener(this)
// Finally commit the setup to our PullToRefreshLayout
.setup(mPullToRefreshLayout);
}
if (TAB_2.equals(tabId)) {
//updateTab(R.id.tab_2);
mCurrentTab = 1;
//Toast.makeText(getApplicationContext(), "2No Guest list for Today", Toast.LENGTH_SHORT).show();
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#fff498"));
//http://192.168.21.74/mynetwork/formapi/trending
//http://192.168.21.74/mynetwork/formapi/popular
ActionBarPullToRefresh.from(this)
// Mark All Children as pullable
.allChildrenArePullable()
// Set the OnRefreshListener
.listener(this)
// Finally commit the setup to our PullToRefreshLayout
.setup(mPullToRefreshLayout1);
}
if (TAB_3.equals(tabId)) {
//updateTab(R.id.tab_2);
mCurrentTab = 2;
// Toast.makeText(getApplicationContext(), "3No Guest list for Today", Toast.LENGTH_SHORT).show();
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#fff498"));
ActionBarPullToRefresh.from(this)
// Mark All Children as pullable
.allChildrenArePullable()
// Set the OnRefreshListener
.listener(this)
// Finally commit the setup to our PullToRefreshLayout
.setup(mPullToRefreshLayout2);
}
}