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Can not load data to ListView in Activity

I'm using json to load data in Activity class with content following as:
My Activity class:
public class CategoryCarActivity extends ListActivity {
ConnectionDetector cd;
AlertDialogManager alert = new AlertDialogManager();
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
ArrayList<Category> carsList = new ArrayList<Category>();
JSONArray manufacturers = null;
String manufacturer_id, manufacturer_name;
private static final String URL_MANUFACTURERS = "MyURL";
// ALL JSON node names
private static final String TAG_CARS = "cars";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_MANUFACTURER = "name";
private static final String TAG_PRICE = "price";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_category);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(CategoryCarActivity.this, "Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
Intent i = getIntent();
manufacturer_id = i.getStringExtra("id");
carsList = new ArrayList<Category>();
// Loading tracks in Background Thread
new LoadTracks().execute();
// get listview
ListView lv = getListView();
/**
* Listview on item click listener
* SingleTrackActivity will be lauched by passing manufacturer id, car id
* */
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View view, int arg2, long arg3) {
// On selecting single track get car information
Intent i = new Intent(getApplicationContext(), DetailListCarActivity.class);
// to get car information
// both manufacturer id and car is needed
String manufacturer_id = ((TextView) view.findViewById(R.id.manufacturer_id)).getText().toString();
String car_id = ((TextView) view.findViewById(R.id.car_id)).getText().toString();
Toast.makeText(getApplicationContext(), "Manufacturer Id: " + manufacturer_id + ", Car Id: " + car_id, Toast.LENGTH_SHORT).show();
i.putExtra("manufacturer_id", manufacturer_id);
i.putExtra("car_id", car_id);
startActivity(i);
}
});
}
/**
* Background Async Task to Load all tracks under one album
* */
class LoadTracks extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(CategoryCarActivity.this);
pDialog.setMessage("Loading selected car ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting tracks json and parsing
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// post album id as GET parameter
params.add(new BasicNameValuePair(TAG_ID, manufacturer_id));
// getting JSON string from URL
String json = jsonParser.makeHttpRequest(URL_MANUFACTURERS, "GET",
params);
// Check your log cat for JSON reponse
Log.d("Category List JSON: ", json);
try {
JSONObject jObj = new JSONObject(json);
if (jObj != null) {
String manufacturer_id = jObj.getString(TAG_ID);
manufacturer_name = jObj.getString(TAG_MANUFACTURER);
manufacturers = jObj.getJSONArray(TAG_CARS);
if (manufacturers != null) {
// looping through All cars
for (int i = 0; i < manufacturers.length(); i++) {
JSONObject c = manufacturers.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
// track no - increment i value
String track_no = String.valueOf(i + 1);
String name = c.getString(TAG_NAME);
String price = c.getString(TAG_PRICE);
// creating new HashMap
// HashMap<String, String> map = new HashMap<String, String>();
Category category = new Category();
category.setManufacturer_id(manufacturer_id);
category.setId(id);
category.setName(name);
category.setPrice(price);
// adding each child node to HashMap key => value
/*
map.put("manufacturer_id", manufacturer_id); // note here
map.put(TAG_ID, car_id);
map.put("track_no", track_no + ".");
map.put(TAG_NAME, name);
map.put(TAG_PRICE, price);
*/
// adding HashList to ArrayList
// carsList.add(map);
carsList.add(category);
}
} else {
Log.d("Manufacturers: ", "null");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String result) {
pDialog.dismiss();
ListAdapter adapter = new ArrayAdapter<Category>(
CategoryCarActivity.this, // the context
R.layout.list_item_categorys, // Simple list item - will toString() your data
carsList // The arraylist
);
// updating listview
setListAdapter(adapter);
}
}
}
list_item_categorys.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/manufacturer_id"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<!-- Song id / Hidden by default -->
<TextView
android:id="#+id/car_id"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="#+id/track_no"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="15dip"
android:paddingLeft="5dip"
android:paddingTop="15dip"
android:textColor="#000000"
android:textSize="16dip"
android:layout_alignParentLeft="true"/>
<TextView
android:id="#+id/manufacturer_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="15dip"
android:paddingLeft="5dip"
android:paddingTop="15dip"
android:textColor="#000000"
android:textSize="16dip"
android:layout_toRightOf="#+id/track_no"/>
<TextView
android:id="#+id/price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:paddingLeft="3dip"
android:paddingRight="6dip"
android:textColor="#9ed321" />
I have debugged and check Logcat and see that data has loaded and everything normal, but don't know why data can not load to ListView
updated
Logcat:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.totoroads.android.app, PID: 4697
java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:393)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
How to fix this problem?? thank you

You're not providing your list to the list view. You need to add your list to your list view with an adapter. This tutorial should help walk you through the process. http://www.vogella.com/tutorials/AndroidListView/article.html
In your postExecute of your asyncTask you can than call adapter.notifyDataSetChanged(). And your view will update with the new list content.

This code looks really similar... maybe copy the rest of it?
You need an Adapter for your data.
protected void onPostExecute(String result) {
// dismiss the dialog after getting all tracks
pDialog.dismiss();
ListAdapter adapter = new ArrayAdapter<Category>(
CategoryCarActivity.this, // the context
android.R.layout.simple_list_item_1, // Simple list item - will toString() your data
carList // The arraylist
);
// updating listview
setListAdapter(adapter);
}
You can also make a subclass of ArrayAdapter<Category> if you really want to customize a layout.

Adding to Ben's answer, you need to set the list to the listview adapter after the asynctask completes its background functionality i.e in onPostExecute() method of the asynctask.

Need to set the list view as suggested by Ben in onPostExecute().
ListView listView = (ListView) findViewById(R.id.your_list_view_id);
listView.getAdapter().notifyDataSetChanged();

How to fill ListView with Adapters

I'm aware that this is very simple question but I'm a newbie in Android development so please go easy on me.
Problem that I have is in one of the fragments (AsyncTask specifically) that lays in my main activity.
AsyncTask sends out data to php script which then returns according data in json format. This is then processed and saved to jsonlist array. Up until post execute everything works fine data is downloaded, processed etc. However when program reaches post execute problems start to pop out. And basically i'm unable to list out all the data from jsonlist to listview
//setting up an array
ArrayList<HashMap<String, String>> jsonlist = new ArrayList<HashMap<String, String>>();
//creating list view variable
ListView listview;
//Define work in progress dialog
private ProgressDialog mProgressDialog;
private class ProgressTask extends AsyncTask<String, Void, Boolean> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(getActivity());
// Set progressdialog title
mProgressDialog.setTitle("Please wait");
// Set progressdialog message
mProgressDialog.setMessage("Fetching data...");
mProgressDialog.setIndeterminate(false);
}
#Override
protected Boolean doInBackground(String... params) {
//To do in the background
//Define variable of JSON parser type
JSONParser jParser = new JSONParser();
//Pass url to json parser class to fetch and save it into array variable
JSONArray json = jParser.getJSONFromUrl(url);
//loop from 0 to length of an array by increasing by 1
for (int i = 0; i < json.length(); i++) {
//Try and catch routine to prevent any crashes
try {
//Get an object defined in { ... } in original json file
JSONObject c = json.getJSONObject(i);
//Separate object by obtaining values for each of the sections
String vtitle = c.getString(title);
String vcontent = c.getString(content);
String vuser = c.getString(user);
HashMap<String, String> map = new HashMap<String, String>();
//Fill up an array with data extracted
map.put(title, vtitle);
map.put(content, vcontent);
map.put(user, vuser);
//Add values into jsonlist
jsonlist.add(map);
} catch (JSONException e)
{
//In case of any error Stack trace will be returned
e.printStackTrace();
}
}
//Once everything has been done return null value
return null;
}
#Override
protected void onPostExecute(Boolean aBoolean) {
//Insert all data downloaded through list adapter
ListAdapter adapter = new SimpleAdapter(getActivity(), jsonlist, R.layout.list_activity, new String[] { title, content, user }, new int[] { R.id.title, R.id.content, R.id.user });
// Locate the listview
//listview = (ListView) findViewById(R.id.list);
// Set the adapter to the ListView
//listview.setAdapter(adapter);
//Get rid off dialog when operation of fetching data has been done
if (mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
}
}
}
As you can see i have tried the commented code but listview = (ListView) findViewById(R.id.list); returns following error:
Cannot resolve method findViewById(int)
which prevents me from executing program. This is very upsetting because I literally have all the data i need in an array but only one line of code stops me from displaying it.
I have also tried:
ListAdapter adapter = new SimpleAdapter(context, jsonlist, R.layout.list_activity, new String[] { title, content, user }, new int[] { R.id.title, R.id.content, R.id.user });
setListAdapter(adapter);
lv = getListView();
But as in previous case error of unresolved method is returned. Which is due to the fact that fragment is extended by fragment and adding anything to it crashes it
public class Fragment2 extends Fragment, ListActivity {...}

Add this to your code in Fragment2 class.
private ListView listview;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.YOUR_FRAGMENT_LAYOUT, container, false);
listview = (ListView) v.findViewById(R.id.R.id.list);
return v;
}

Since you are in a Fragment you have to call getView() before findViewById, like this
//Insert all data downloaded through list adapter
ListAdapter adapter = new SimpleAdapter(getActivity(), jsonlist, R.layout.list_activity, new String[] { title, content, user }, new int[] { R.id.title, R.id.content, R.id.user });
// Locate the listview
listview = (ListView) getView().findViewById(R.id.list);

How to show employees details on ListView from ArrayList?

Here I am taking three ArrayList (EmpName, EmpID and EmpPhone).
In this, I am storing 5 data in each arraylist and after that I'm trying to show
all data on listview like in each row of list view there will be 3 data.but I'm not
getting exact output. Here my entire code...Please help... Thank you.
activity_main.xml
<ListView
android:id="#+id/main_listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
custom_checkbox.xml
<TextView
android:id="#+id/custom_empname_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/custom_empid_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/custom_empphone_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
MainActivity.java
public class MainActivity extends Activity {
ArrayList<String> EmpName;
ArrayList<String> EmpID;
ArrayList<String> EmpMobile;
void getEmpDetails() {
EmpName.add("Jhon");
EmpName.add("Joy");
EmpName.add("Jain");
EmpName.add("Jason");
EmpName.add("Joky");
EmpID.add("1001");
EmpID.add("1002");
EmpID.add("1003");
EmpID.add("1004");
EmpID.add("1005");
EmpMobile.add("8179789878");
EmpMobile.add("8179789478");
EmpMobile.add("8179789378");
EmpMobile.add("8179789278");
EmpMobile.add("8179789678");
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView list = (ListView)findViewById(R.id.main_listView1);
}
class ListAdapter extends BaseAdapter {
#Override
public int getCount() {
// TODO Auto-generated method stub
return EmpName.size();
}
#Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int index, View v, ViewGroup vg) {
// TODO Auto-generated method stub
v = getLayoutInflater().inflate(R.layout.custom_checkbox, null);
TextView t1 = (TextView)v.findViewById(R.id.custom_empname_textView);
TextView t2 = (TextView)v.findViewById(R.id.custom_empid_textView);
TextView t3 = (TextView)v.findViewById(R.id.custom_empphone_textView);
EmpName = new ArrayList<String>();
EmpID = new ArrayList<String>();
EmpMobile = new ArrayList<String>();
getEmpDetails();
ArrayAdapter<String> a1 =
new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, EmpName);
ArrayAdapter<String> a2 =
new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, EmpID);
ArrayAdapter<String> a3 =
new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, EmpMobile);
t1.setText((CharSequence) a1);
t2.setText((CharSequence) a2);
t3.setText((CharSequence) a3);
return null;
}
}
}

Based on your questions and issues, I would suggest you below points:
Manage a single ArrayList:
Managing different ArrayLists for the same object would be hard to manage. Like you are managing 3 ArrayList for storing information of Employee. Instead, you should manage a single ArrayList where Employee is a class.
Get particular Employee object: You can get particular Employee object inside the getView() method by position.
You are creating ArrayAdapter inside getView() method of your custom adapter. Not required at all.
And your code requires so many changes, better you get any android book and learn Android programming well.

Your code will not work, because you are using adapter wrong (and not setting to ListView at all).
Unfortunately, your code needs too many changes (for example, you should change new object Employee, you should pass array of these objects to adapter and bing values of Employee to item views) for resolving it in my answer, so just read good tutorial about adapters and try to write this code again:
http://www.javacodegeeks.com/2013/09/android-listview-with-adapter-example.html
http://www.vogella.com/tutorials/AndroidListView/article.html
Hope it helps.

How do I make separators for a ListView with a SimpleAdapter

I'm new to the java programming language and I'm trying to build an app. The app has to make a list of worked hours that have been saved in an MySQL database. I found an example app, that helped me retrieving the data from the database and putting it in a ListView.
But now we get to my problem. I want to put separators in the listview.
Now, the date of the worked hours is in every item of the ListView. I want the date only above the first item.
I've searched the internet for a way to do this, but it didn't help me.
This it the code that gets the data and puts it in a ListView:
public class AllUrenActivity extends ListActivity {
String url_all_uren;
String ip;
String proid;
String uid = MainScreenActivity.uid;
String datum;
String datum1;
ImageView btntoevoegen;
// Progress Dialog
private ProgressDialog pDialog;
TextView tvDatum;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>>urenList;
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_UREN = "uren";
private static final String TAG_TRID = "trid";
private static final String TAG_PROID = "proid";
private static final String TAG_WERKZAAMHEID = "werkzaamheid";
private static final String TAG_TIJD = "tijd";
private static final String TAG_DATUM = "datum";
// products JSONArray
JSONArray uren = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_uren);
SharedPreferences settings = getSharedPreferences("databaseIP", 0);
ip = settings.getString("ip", "").toString();
url_all_uren = ("http://"+ip+"/android_connect/get_all_uren.php");
// Hashmap for ListView
urenList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllUren().execute();
// Get listview
ListView lv = getListView();
// on selecting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String proid = ((TextView) view.findViewById(R.id.tvProid)).getText()
.toString();
String werkzaamheid = ((TextView) view.findViewById(R.id.tvWerkzaamheid)).getText()
.toString();
String trid = ((TextView) view.findViewById(R.id.tvTrid)).getText()
.toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
AllProjectsActivity.class);
// sending pid to next activity
in.putExtra(TAG_PROID, proid);
in.putExtra(TAG_TRID, trid);
in.putExtra(TAG_WERKZAAMHEID, werkzaamheid);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Edit Product Activity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllUren extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllUrenActivity.this);
pDialog.setMessage("Uren laden...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("uid", uid));
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_uren, "GET", params);
// Check your log cat for JSON reponse
Log.d("Uren: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
uren = json.getJSONArray(TAG_UREN);
// looping through All Products
for (int i = 0; i < uren.length(); i++) {
JSONObject c = uren.getJSONObject(i);
// Storing each json item in variable
String trid = c.getString(TAG_TRID);
String proid = c.getString(TAG_PROID);
String werkzaamheid = c.getString(TAG_WERKZAAMHEID);
String datum = c.getString(TAG_DATUM);
String tijd = c.getString(TAG_TIJD);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_TRID, trid);
map.put(TAG_WERKZAAMHEID, werkzaamheid);
map.put(TAG_PROID, proid);
map.put(TAG_TIJD, tijd);
map.put(TAG_DATUM, datum);
// adding HashList to ArrayList
urenList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
NewProductActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AllUrenActivity.this, urenList,
R.layout.list_uren, new String[] { TAG_TRID, TAG_PROID, TAG_WERKZAAMHEID, TAG_TIJD, TAG_DATUM},
new int[] { R.id.tvTrid, R.id.tvProid, R.id.tvWerkzaamheid, R.id.tvTijd, R.id.tvDatum });
// updating listview
setListAdapter(adapter);
}
});
}
}
}
list_uren.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" >
<TextView
android:id="#+id/tvTrid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
<!-- Name Label -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/tvDatum"
android:layout_width="269dp"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingLeft="6dip"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="17sp"
android:visibility="visible" />
<ImageView
android:id="#+id/toevoegen"
android:layout_width="25dp"
android:layout_height="25dp"
android:src="#android:drawable/ic_menu_add" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/tvTijd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="6dip"
android:text="8:00-12:00"
android:textSize="17sp"
android:textStyle="bold"
android:visibility="visible" />
<TextView
android:id="#+id/tvProid"
android:layout_width="138dp"
android:layout_height="wrap_content"
android:layout_marginLeft="25dp"
android:paddingLeft="6dip"
android:text="Project"
android:textSize="17sp" />
</LinearLayout>
<TextView
android:id="#+id/tvWerkzaamheid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="6dip"
android:paddingTop="6dip"
android:text="Werkzaamheid"
android:textSize="17sp" />
</LinearLayout>
all_uren.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="fill_parent"
android:orientation="vertical">
<!-- Main ListView
Always give id value as list(#android:id/list)
-->
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
What is the best way to get the date separators? Thank you.

Add this at the end of list_uren.xml before closing the LinearLayout
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#666666" />
You can change the background to whatever you want.

Adding ListView Sub Item Text in Android

I have created an RSS reader that lists items in a listview. I also want a date below each item, but I have no idea how to do that. I need someone's help to make the Sub Item text display the pubDate that was retrieved from the RSS feed.
This is the code I have for my class:
public class RSSReader extends Activity implements OnItemClickListener
{
public final String RSSFEEDOFCHOICE = "http://app.calvaryccm.com/mobile/android/v1/devos";
public final String tag = "RSSReader";
private RSSFeed feed = null;
/** Called when the activity is first created. */
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
// go get our feed!
feed = getFeed(RSSFEEDOFCHOICE);
// display UI
UpdateDisplay();
}
private RSSFeed getFeed(String urlToRssFeed)
{
try
{
// setup the url
URL url = new URL(urlToRssFeed);
// create the factory
SAXParserFactory factory = SAXParserFactory.newInstance();
// create a parser
SAXParser parser = factory.newSAXParser();
// create the reader (scanner)
XMLReader xmlreader = parser.getXMLReader();
// instantiate our handler
RSSHandler theRssHandler = new RSSHandler();
// assign our handler
xmlreader.setContentHandler(theRssHandler);
// get our data via the url class
InputSource is = new InputSource(url.openStream());
// perform the synchronous parse
xmlreader.parse(is);
// get the results - should be a fully populated RSSFeed instance, or null on error
return theRssHandler.getFeed();
}
catch (Exception ee)
{
// if we have a problem, simply return null
System.out.println(ee.getMessage());
System.out.println(ee.getStackTrace());
System.out.println(ee.getCause());
return null;
}
}
public boolean onCreateOptionsMenu(Menu menu)
{
super.onCreateOptionsMenu(menu);
menu.add(Menu.NONE, 0, 0, "Refresh");
Log.i(tag,"onCreateOptionsMenu");
return true;
}
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()) {
case 0:
Log.i(tag,"Set RSS Feed");
return true;
case 1:
Log.i(tag,"Refreshing RSS Feed");
return true;
}
return false;
}
private void UpdateDisplay()
{
TextView feedtitle = (TextView) findViewById(R.id.feedtitle);
TextView feedpubdate = (TextView) findViewById(R.id.feedpubdate);
ListView itemlist = (ListView) findViewById(R.id.itemlist);
if (feed == null)
{
feedtitle.setText("No RSS Feed Available");
return;
}
if(feedtitle != null)
feedtitle.setText(feed.getTitle());
if(feedpubdate != null)
feedpubdate.setText(feed.getPubDate());
ArrayAdapter<RSSItem> adapter = new ArrayAdapter<RSSItem>(this,android.R.layout.simple_list_item_1,feed.getAllItems());
itemlist.setAdapter(adapter);
itemlist.setOnItemClickListener(this);
itemlist.setSelection(0);
}
#Override
public void onItemClick(AdapterView parent, View v, int position, long id)
{
//Log.i(tag,"item clicked! [" + feed.getItem(position).getTitle() + "]");
Intent itemintent = new Intent(this,ShowDescription.class);
Bundle b = new Bundle();
b.putString("title", feed.getItem(position).getTitle());
b.putString("description", feed.getItem(position).getDescription());
b.putString("link", feed.getItem(position).getLink());
b.putString("pubdate", feed.getItem(position).getPubDate());
itemintent.putExtra("android.intent.extra.INTENT", b);
startActivity(itemintent);
}
}
This is my XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Android RSSReader"
android:id="#+id/feedtitle"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=""
android:id="#+id/feedpubdate"/>
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/itemlist"
android:fastScrollEnabled="true"/>
</LinearLayout>
This is what it looks like now in Eclipse:
This is what it looks like running:
How to make the Sub Item text display the pubDate that was retrieved from the RSS feed?

The simplest solution is probably to substitute the ArrayAdapter and the android.R.layout.simple_list_item_1 that you are using with a SimpleAdapter and the android.R.layout.simple_list_item_2 predefined layout. This layout is composed by two TextViews, with an id of android.R.id.text1 (the "item") and android.R.id.text2 (the "sub item") respectively, which you will need as a reference for the SimpleAdapter to work.
By looking at the constructor for SimpleAdapter you will notice that, apart from a Context instance and the id of a layout resource, it takes three parameters that may be new to you:
a List<? extends Map<String, ?>> instance where you put the elements you want the ListView to show. Elements are in the form of a Map, i.e. something akin to a struct composed by properties in form of name/value pairs. For example, you may use "title" and "date" as keys for the title and date of each RSS item, respectively.
an array of strings, where to put the names of the keys in each map that you want to show on the ListView.
an array of integers where you need to put the ids of the parts in the list item view where you want the single elements referenced by the keys in the preceding array of strings to be shown. For example, if you want to show the title and date of a RSS item in the "item" and "sub item" views respectively, you use new String[] { "title", "date" } as the array of strings argument, and new int[] { android.R.id.text1, android.R.id.text2 } as this argument.
A rough code example, just to give you the idea:
List<Map<String, String>> data = new ArrayList<Map<String, String>>();
for (RSSItem item : feed.getAllItems()) {
Map<String, String> datum = new HashMap<String, String>(2);
datum.put("title", item.getTitle());
datum.put("date", item.getDate().toString());
data.add(datum);
}
SimpleAdapter adapter = new SimpleAdapter(this, data,
android.R.layout.simple_list_item_2,
new String[] {"title", "date"},
new int[] {android.R.id.text1,
android.R.id.text2});
itemList.setAdapter(adapter);
The documentation states that "the maps contain the data for each row, and should include all the entries specified in the from parameter", so both title and date should always be present.
Please note that this is all off the top of my head. I haven't actually tested all the code, so you may very well encounter some quirk or bug that you need to adjust or fix on your way up.

You should have an item_list.xml file like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="6dp" >
<TextView
android:id="#+id/page_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#D8000000"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="#+id/page_date"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/page_title"
android:ellipsize="marquee"
android:lines="3"
android:marqueeRepeatLimit="marquee_forever"
android:textColor="#D8000000"
android:textSize="12sp" />
</RelativeLayout>
and in your listadapter in the method getview :
View row = convertView;
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
row = inflater.inflate(R.layout.item_list, parent, false);
TextView listTitle = (TextView) row.findViewById(R.id.page_title);
listTitle.setText(title);
TextView date = (TextView) row.findViewById(R.id.page_date);
date.setText( <here put your date from RSS feed>);
return row;
this should do it!

Since you want to map multiple data items to multiple views, you can't use an ArrayAdapter. You'll have to use a SimpleAdapter instead.
Also, I noticed you're getting the RSS feed on the main UI thread. This is going to cause your application to be highly non-responsive. If you don't know what I'm talking about, take a gander at the Painless Threading article (I consider it a must read for any android developer). What you should do instead is use a Loader. They were designed for exactly you type of situation. Although they weren't introduced until API-10 you can still use them on lesser API levels via the Support Package.

create a custom listView http://saigeethamn.blogspot.com/2010/04/custom-listview-android-developer.html