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textview of listview in android

I have Listview that contains a Textview, I populate data from sqlite inside them , now I want to change the textview background color for each row based on the value in each one.
I couldn't do it , can anybody help me for how to get each textview from the listview ??
Edit :
Here is my code to populate the listview:
sql = new SqlCommands(getApplicationContext());
Fields = new String[]{SqlCommands.Group, SqlCommands.Subject, SqlCommands.Body, SqlCommands.DateTime};
int [] Dview = new int []{R.id.grop, R.id.sbj,R.id.bdy,R.id.DT};
Cursor c = sql.GetData();
Adpt = new SimpleCursorAdapter(getApplicationContext(),R.layout.items, c , Fields, Dview ,0 );
NotiLst.setAdapter(Adpt);
this is the XML file for the items :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:background="#drawable/grp_shap" >
<ImageView android:id="#+id/Prio"
android:layout_width="32dip"
android:layout_height="32dip"
/>
<TextView
android:id="#+id/grop"
android:layout_width="64sp"
android:layout_height="40sp"
android:layout_alignBottom="#+id/Prio"
android:layout_alignParentLeft="true"
android:text="S"
android:textSize="12sp" />
<TextView
android:id="#+id/DT"
android:layout_width="wrap_content"
android:layout_height="14sp"
android:layout_alignParentRight="true"
android:layout_alignTop="#id/title"
android:gravity="right"
android:text="Date Rec"
android:layout_marginRight="5dip"
android:textSize="12sp"
/>
<TextView
android:id="#+id/bdy"
android:layout_width="fill_parent"
android:layout_height="28sp"
android:layout_below="#+id/DT"
android:layout_toLeftOf="#+id/hi"
android:layout_toRightOf="#+id/Prio"
android:text="Body"
android:textSize="12sp" />
<TextView
android:id="#+id/sbj"
android:layout_width="fill_parent"
android:layout_height="12sp"
android:layout_alignLeft="#+id/bdy"
android:layout_alignParentTop="true"
android:layout_alignRight="#+id/bdy"
android:fontFamily="sans-serif"
android:text="Subject"
android:textSize="12sp" />
<ImageView
android:id="#+id/hi"
android:layout_width="20dip"
android:layout_height="26dip"
android:layout_alignLeft="#+id/DT"
android:layout_below="#+id/DT"
android:layout_marginLeft="15dp"
android:src="#drawable/highprio" />
</RelativeLayout>
and I have a listview on the activity_mail layout which populated whith this items.
I want to change the color for the textview with id grop based on the value inserted on it

You should use a custom adapter:
public class MyAdapter extends BaseAdapter {
private static class ViewHolder {
public final TextView mTv;
}
private final Context mContext;
private final List<String> mList; //you can change this to String array
public MyAdapter (Context context, List<String> list) {
this.mContext = context;
this.mList= list;
}
#Override
public int getCount() {
return mList.size();
}
#Override
public String getItem(int position) {
return mList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder h;
final String string = mList.get(position);
if (convertView == null) {
convertView = View.inflate(mContext, R.layout.item_listview, null);
h = new ViewHolder();
h.mTv= (TextView) convertView .findViewById(R.id.mTvRes);
convertView.setTag(h);
} else {
h = (ViewHolder) convertView.getTag();
}
h.mTv.setText....
h.mTv.setTextColor....
h.mTv.setBackground....
return convertView;
}
}
in your activity:
List<String> list = Arrays.asList(Fields);
MyAdapter adapter = new MyAdapter(this, list);
NotiLst.setAdapter(adapter);
I didn't checked it and you maybe need to do some changes but it should work.

If you have something like this:
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(resource, parent, false);
viewHolder = new ViewHolder();
viewHolder.label = (TextView) convertView.findViewById(android.R.id.text1);
viewHolder.label.setBackground(getResources().getColor(color.white));
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.label.setText(activitiesList.get(position).getName());
return convertView;
}

Android: Custom ArrayAdapter not working, getView() not getting called

I am using CustomArrayAdapter with ListView. But, even after setting setAdapter it is not working. Following are my code snippets:
PastOrders.java Fragment displaying listView
public class PastOrders extends Fragment {
private View view;
private ListView pastOrdersList;
private Context context;
private ArrayList<Order> orders;
public PastOrders() {
}
#Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
view = inflater.inflate(R.layout.fragment_pastorders, container, false);
context = getActivity();
pastOrdersList = (ListView) view.findViewById(R.id.pastOrdersList);
ParseQuery<ParseObject> query = ParseQuery.getQuery("Order");
query.whereEqualTo("user_id", Vars.currentUser);
query.findInBackground(new FindCallback<ParseObject>() {
#Override
public void done(List<ParseObject> objects, ParseException e) {
if(e != null) {
Log.e("TAG", e.getLocalizedMessage());
} else {
ArrayList<Order> orders = new ArrayList<Order>();
Log.i("TAG", objects.toString());
for (ParseObject object: objects) {
Order temp = new Order();
temp.orderId = object.getObjectId();
temp.date = object.getCreatedAt();
temp.status = object.getString("status");
Log.i("TAG", "orderID: "+ object.getObjectId() + " temp orderID"+ temp.orderId);
orders.add(temp);
Vars.pastOrders.add(object);
}
Log.i("TAG", "after for loop past orders: "+ orders.toString());
PastOrdersAdapter pastOrdersAdapter = new PastOrdersAdapter(getActivity(), R.layout.past_orders_row, orders);
pastOrdersList.setAdapter(pastOrdersAdapter);
}
}
});
return view;
}
#Override
public void onResume() {
super.onResume();
}
}
PastOrdersAdapter.java Custom Adapter
public class PastOrdersAdapter extends ArrayAdapter<Order> {
private Context context;
private ViewHolder holder;
//private ArrayList<Order> orders;
public PastOrdersAdapter(Context context, int resource, List<Order> orders) {
super(context, resource);
// this.orders = orders;
Log.i("TAG", "POA adapter called");
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.i("TAG", "getView from POA");
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
if (convertView == null) {
convertView = inflater
.inflate(R.layout.past_orders_row, parent, false);
holder = new ViewHolder();
holder.orderId = (TextView) convertView.findViewById(R.id.orderId);
holder.date = (TextView) convertView.findViewById(R.id.date);
holder.status = (TextView) convertView.findViewById(R.id.status);
holder.details = (ImageView) convertView.findViewById(R.id.details);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ParseObject order = Vars.pastOrders.get(position);
Log.i("TAG", "order id in adapter: "+ order.getObjectId());
if(order != null) {
holder.orderId.setText(order.getObjectId());
holder.date.setText(getFormattedDate(order.getCreatedAt()));
holder.status.setText(order.getString("status"));
if(order.getString("status").equals("Delivered")) {
holder.status.setTextColor(Color.GREEN);
} else if(order.getString("status").equals("Cancelled")) {
holder.status.setTextColor(Color.RED);
} else {
holder.status.setTextColor(Color.YELLOW);
}
}
return convertView;
}
static class ViewHolder {
TextView orderId;
TextView date;
TextView status;
ImageView details;
}
}
Order.java
public class Order {
public String orderId;
public Date date;
public String status;
}
fragment_pastorders.xml Layout File for Fragment showing ListView
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="#+id/pastOrdersList"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</RelativeLayout>
past_orders_row.xml Layout file for each row of listview
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="150dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="150dp"
android:orientation="vertical"
android:id="#+id/LinearLayout01">
<TextView
android:id="#+id/orderId"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/date"
android:textStyle="italic"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/status"/>
</LinearLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_action_next_item"
android:layout_toRightOf="#id/LinearLayout01"
android:layout_centerVertical="true"
android:id="#+id/details"/>
</RelativeLayout>
I have tried printing getCount() as well and it is non-zero. I have tried everything. Kindly help
Thanks,
Arpit

In the constructor of your custom adapter, your forgot to pass your orders parameter to the parent constructor. So your adapter does not know what to display.

You are passing empty list orders to you adapter. And then in adapter you are using different list: Vars.pastOrders.
So your adapter has empty list.
Replace this:
PastOrdersAdapter pastOrdersAdapter =
new PastOrdersAdapter(getActivity(), R.layout.past_orders_row, orders);
with this:
PastOrdersAdapter pastOrdersAdapter =
new PastOrdersAdapter(getActivity(), R.layout.past_orders_row, Vars.pastOrders);

My listView shows only one record of 3

I have a list view which displays only one record always, I've traced my program and find that there are 3 records in my arrayList which I'm passing to the listView adapter. After tracing into getView of list view I find that It executes more that 3 times with position of 0!
I have no idea what's the problem, please help me if you can.
activity_news.xml:
<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:background="#color/background"
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=".News" >
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ListView
android:id="#+id/lvNews"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="50dp" />
</ScrollView>
</RelativeLayout>
this is row template for listView: news_row.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:background="#drawable/message_row_style"
android:layout_gravity="right"
android:gravity="right"
android:orientation="vertical" >
<LinearLayout
android:layout_marginTop="50dp"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/txtTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#color/dark_purple"
android:layout_gravity="right"
android:gravity="right"
android:background="#color/red"
/>
<TextView
android:id="#+id/txtDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/dark_purple"
android:layout_gravity="right"
android:background="#color/blue"
android:gravity="right" />
</LinearLayout>
</LinearLayout>
newsAdapter.java:
public class NewsAdapter extends BaseAdapter{
private Context context;
private ArrayList<News> list;
private Activity activity;
public NewsAdapter(Context c,Activity activity,ArrayList<News> l) {
Log.d("Ehsan", "News Adapter Constructor");
context = c;
list = l;
this.activity = activity;
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int i) {
return list.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.news_row, parent,false);
TextView title = (TextView) row.findViewById(R.id.txtTitle);
TextView date = (TextView) row.findViewById(R.id.txtDate);
News temp = list.get(position);
title.setText(temp.getTitle());
date.setText(temp.getsDate());
title.setTag(temp.getid());
title.setOnClickListener(onClickListener);
return row;
}
private OnClickListener onClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
String date = null,title = null,description = null;
int id=1;
Intent i = null;
News news = new News(activity);
news.load(id);
date = news.getsDate()+" - ";
title = news.getTitle();
description = news.getDescription();
i = new Intent(activity,ShowInfo.class);
i.putExtra("date", date);
i.putExtra("title", title);
i.putExtra("description", description);
activity.startActivity(i);
activity.finish();
}
};
}

Do following changes in your getView
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
ViewHolder holder=new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.news_row, parent,false);
TextView title = (TextView) row.findViewById(R.id.txtTitle);
TextView date = (TextView) row.findViewById(R.id.txtDate);
convertView.setTag(holder);
}
ViewHolder hold=(ViewHolder)convertView.getTag();
News temp = list.get(position);
hold.title.setText(temp.getTitle());
hold.date.setText(temp.getsDate());
title.setOnClickListener(onClickListener);
return row;
}
add this class in your adapter file
static class ViewHolder
{
TextView title;
TextView date;
}

You should call super in the constructor of your adapter change your adapter as following:
public class NewsAdapter extends ArrayAdapter<News>{
private Context context;
private ArrayList<News> list;
private Activity activity;
public NewsAdapter(Context c,Activity activity,ArrayList<News> l) {
super(c,-1,l);//<-- **pass your item list to super**
Log.d("Ehsan", "News Adapter Constructor");
context = c;
list = l;
this.activity = activity;
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int i) {
return list.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.news_row, parent,false);
TextView title = (TextView) row.findViewById(R.id.txtTitle);
TextView date = (TextView) row.findViewById(R.id.txtDate);
News temp = list.get(position);
title.setText(temp.getTitle());
date.setText(temp.getsDate());
title.setTag(temp.getid());
title.setOnClickListener(onClickListener);
return row;
}
private OnClickListener onClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
String date = null,title = null,description = null;
int id=1;
Intent i = null;
News news = new News(activity);
news.load(id);
date = news.getsDate()+" - ";
title = news.getTitle();
description = news.getDescription();
i = new Intent(activity,ShowInfo.class);
i.putExtra("date", date);
i.putExtra("title", title);
i.putExtra("description", description);
activity.startActivity(i);
activity.finish();
}
};
}

Can't find TextView in recursive custom Listview adapter

I created this class called GeoArea, which is suppose to store "Geographical Area" that have children Geographical Areas, this is fairly strait foward:
public class GeoArea {
public String id;
public String name;
public List<GeoArea> subGeoAreas;
public GeoArea parentGeoArea;
public GeoArea(String id) {
this.id = id;
name = id;
subGeoAreas = new LinkedList<GeoArea>();
}
#Override
public String toString() {
return name;
}
}
I have created the following Layout to render it on Android, the idea here is to for each GeoArea to recursively render it self and then it's children GeoArea in a listView:
//layout_geo_area.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/txtGeoAreaName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:gravity="left"
android:text="Geo Area Name"
android:textAppearance="?android:attr/textAppearanceLarge" />
<ListView
android:id="#+id/listViewChildGeoAreas"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/txtGeoAreaName"
android:gravity="left" >
</ListView>
</RelativeLayout>
This is my adapter I created for GeoArea to be displayed in a listView:
public class AdapterGeoArea extends ArrayAdapter<GeoArea>{
private ArrayList<GeoArea> _myGeoArea;
private Context _myContext;
LayoutInflater _inflater;
public AdapterGeoArea(Context context, ArrayList<GeoArea> myGeoArea) {
super(context, 0, myGeoArea);
_myGeoArea = myGeoArea;
_inflater = LayoutInflater.from(context);
_myContext = context;
}
public int getCount() {
return _myGeoArea.size();
}
public View getView(int position, View convertView, ViewGroup parent) {
GeoAreaLayoutHolder holder;
if (convertView == null) {
convertView = _inflater.inflate(R.layout.layout_geo_area,parent,false);
holder = new GeoAreaLayoutHolder();
holder.txtGeoAreaName = (TextView)convertView.findViewById(R.id.txtGeoAreaName);
holder.txtGeoAreaName.setTag(convertView);
holder.listViewChildGeoAreas = (ListView)convertView.findViewById(R.id.listViewChildGeoAreas);
holder.listViewChildGeoAreas.setTag(convertView);
} else {
holder = (GeoAreaLayoutHolder) convertView.getTag();
}
GeoArea curGeoArea = _myGeoArea.get(position);
holder.txtGeoAreaName.setText(curGeoArea.name);
if(curGeoArea.subGeoAreas.size()>0){
ArrayList<GeoArea> testList = new ArrayList<GeoArea>();
AdapterGeoArea adapter = new AdapterGeoArea(_myContext, testList);
for(GeoArea childGeoArea:curGeoArea.subGeoAreas){
testList.add(childGeoArea);
}
holder.listViewChildGeoAreas.setAdapter(adapter);
}
return convertView;
}
static class GeoAreaLayoutHolder {
public TextView txtGeoAreaName;
public ListView listViewChildGeoAreas;
}
}
And here is my Activity that I am using to set it all up:
public class ActivityGeoAreas extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_geo_area);
GeoArea.searchTerm = "Bar & Grill";
GeoArea torontoArea = new GeoArea("cityOfToronto");
ArrayList<GeoArea> testList = new ArrayList<GeoArea>();
testList.add(torontoArea);
AdapterGeoArea adapter = new AdapterGeoArea(this, testList);
ListView lv = (ListView) findViewById(R.id.listViewChildGeoAreas);
lv.setAdapter(adapter);
}
}
When I try to run it, I get the error nullPointerException on the line:
holder.txtGeoAreaName.setText(curGeoArea.name);
What am I doing wrong?

You may want to check ExpandableListView may suit your needs better
http://developer.android.com/reference/android/widget/ExpandableListView.html
An example # http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/
Continuing from my previous answer to your question ( i though that solved your problem)
To display just name in your listview
list_row.xml // this is the layout with textview to be inflated in getView.
Each row will have textview
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/textGeoArea"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="14dp"
android:text="Choose Area"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
layout_geo_area.xml // with only listview no textview
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="#+id/listViewChildGeoAreas"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:gravity="left" >
</ListView>
</RelativeLayout>
Now your adapter class
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_row,parent,false);
// inflate list_row.xml with textview
holder = new ViewHolder();
holder.tv = (TextView)convertView.findViewById(R.id.textGeoArea);
holder.setTag(convertView);
}
else {
holder = (ViewHolder) convertView.getTag();
}
GeoArea curGeoArea = _myGeoArea.get(position);
holder.tv.setText(curGeoArea.name);
return convertView;
}
static class ViewHolder // use a view holder for smooth scrolling an performance
{
TextView tv;
}
You have a custom adapter.
public class AdapterGeoArea extends ArrayAdapter<GeoArea>{
Now you set the adapter to listview like below
AdapterGeoArea adapter = new AdapterGeoArea(this, testList);
ListView lv = (ListView) findViewById(R.id.listViewChildGeoAreas);
lv.setAdapter(adapter);
So why do you need the below. remove these
if(curGeoArea.subGeoAreas.size()>0){
ArrayList<GeoArea> testList = new ArrayList<GeoArea>();
AdapterGeoArea adapter = new AdapterGeoArea(_myContext, testList);
for(GeoArea childGeoArea:curGeoArea.subGeoAreas){
testList.add(childGeoArea);
}
holder.listViewChildGeoAreas.setAdapter(adapter);

Populate list in ListFragment through custom ArrayAdapter - my data doesn't show but are present in the adapter

I am new in android app dev and I am trying to create a ListFragment consisting of a TextView and a ListView. I want to try and populate the ListView with data from a custom class and thus created a custom ArrayAdapter. My app runs but doesn't show anything in the list and I can't figure out why not. I have logged the data and it is present in the holder and the text seems to be set but something is wrong.
row_layout.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip" >
<LinearLayout
android:orientation="vertical"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="fill_parent">
<TextView
android:id="#+id/TextViewStation"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:gravity="center_vertical"
android:text="My Application" />
<TextView
android:id="#+id/TextViewType"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:singleLine="true"
android:ellipsize="marquee"
android:text="Simple application that shows how to use RelativeLayout" />
</LinearLayout>
</RelativeLayout>
list_layout.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" >
<TextView
android:id="#+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="No items to display." />
<ListView
android:id="#+id/android:list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
SimpleArrayAdapter.java
public class SimpleArrayAdapter extends ArrayAdapter<Warning> {
private final Context context;
private final List<Warning> objects;
public SimpleArrayAdapter(Context context, int resource,
List<Warning> objects) {
super(context, resource);
this.context = context;
this.objects = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = new ViewHolder();
if (row == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.row_layout, parent, false);
holder.v1 = (TextView) row.findViewById(R.id.TextViewStation);
holder.v2 = (TextView) row.findViewById(R.id.TextViewType);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
final Warning warning = objects.get(position);
if (warning != null) {
holder.v1.setText(warning.getStation());
holder.v2.setText(warning.getType());
// Log.d("Adapter", "holder.v1.getText(): " + holder.v1.getText());
}
return row;
}
public static class ViewHolder {
TextView v1; // view1
TextView v2; // view2
}
#Override
public int getCount() {
return objects.size();
}
#Override
public Warning getItem(int position) {
// TODO Auto-generated method stub
return objects.get(position);
}
}
List_View.java - the ListFragment
public class List_View extends ListFragment {
List<Warning> items = new ArrayList<Warning>();
Gson gson = new Gson();
private SimpleArrayAdapter adapter;
private ListView mListView;
// #Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ---- Get data!
JsonElement je = new JsonParser().parse(result);
JsonObject jo = je.getAsJsonObject();
JsonArray ja = jo.getAsJsonArray("warnings");
for (int i = 0; i < ja.size(); i++) {
Warning war = new Warning();
war = gson.fromJson(ja.get(i).getAsJsonObject(), Warning.class);
items.add(war);
}
// ----
}
// #Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater
.inflate(R.layout.list_layout, container, false);
// RESTManager manager = new RESTManager();
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.d("Adapter", "items.size(): "+ items.size());
adapter = new SimpleArrayAdapter(getActivity(), R.layout.row_layout,
items);
setListAdapter(adapter);
}
}
In SimpleArrayAdapter, me logging the result from holder.v1.getText() returns correct value but still nothing is showing in the ListView in the app.

Try this :
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
TextView station, type ;
if (row == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.row_layout, parent, false);
station = (TextView) row.findViewById(R.id.TextViewStation);
type = (TextView) row.findViewById(R.id.TextViewType);
}
Warning warning = objects.get(position);
if (warning != null) {
station.setText(warning.getStation());
type.setText(warning.getType());
// Log.d("Adapter", "holder.v1.getText(): " + holder.v1.getText());
}
return row;
}

I found the problem. Stupidly for some reason I had android:layout_width="0dip" for the textviews........ changed to android:layout_width="fill_parent" and boom, there is my data!