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Can not set value to list view using custom adapter

When I am trying to set value to the list view using custom adapter it shows only the last entered value in the hash map. hash map is static.I dont know why I am not getting all the values in the hashmap for that keys I am used in hashmap.
here my code
public class Nextclass extends Activity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nextclass);
list = (ListView)findViewById(R.id.list1);
SelectItems();
ViewItems();
}
private List<Map<String, String>> SelectItems() {
// TODO Auto-generated method stub
try {
datas = new ArrayList<Map<String, String>>();
DatabaseHelper dbHelper = new DatabaseHelper(this.getApplicationContext());
newDB = dbHelper.getWritableDatabase();
Cursor c = newDB.rawQuery("select distinct code ,desc ,name "
+ " from item", null);
while (c.moveToNext()){
String cod = c.getString(c.getColumnIndex("code"));
datanums.put("code", cod);
String desc1 = c.getString(c.getColumnIndex("desc"));
datanums.put("desc", desc1);
String name = c.getString(c.getColumnIndex("name"));
datanums.put("name", name);
datas.add(datanums);
}
} catch (SQLiteException se ) {
Log.e(getClass().getSimpleName(), "Could not create or Open the database");
}
return datas;
}
private void ViewItems() {
// TODO Auto-generated method stub
arrTemp = new String[datas.size()];
MyListAdapter myListAdapter = new MyListAdapter();
list.setAdapter(myListAdapter);
Log.v("list itemm",datas.toString());
}
public class MyListAdapter extends BaseAdapter{
#Override
public int getCount() {
// TODO Auto-generated method stub
if(datas != null && datas.size() != 0){
return datas.size();
}
return 0;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return datas.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
LayoutInflater inflater = Orders.this.getLayoutInflater();
convertView = inflater.inflate(R.layout.order_simple_row, null);
holder.textView1 = (TextView) convertView.findViewById(R.id.name);
holder.textView2 = (TextView) convertView.findViewById(R.id.code);
holder.textview3 = (TextView) convertView.findViewById(R.id.desc);
holder.editText1 = (EditText) convertView.findViewById(R.id.cases);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.ref = position;
holder.textView1.setText(datanums.get("name"));
holder.textview3.setText(datanums.get("code"));
holder.textView2.setText(datanums.get("desc"));
holder.editText1.setText(arrTemp[position]);
holder.editText1.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
#Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
arrTemp[holder.ref] = arg0.toString();
}
});
return convertView;
}
private class ViewHolder {
public Object list;
TextView textView1,textView2,textview3;
EditText editText1,editText2;
int ref;
}
return convertView;
}
private class ViewHolder {
public Object list;
TextView textView1,textView2,textview3;
EditText editText1;
int ref;
}
please help.I used alternate methods,but not worked.thanks in advance

holder.textView1.setText(datas.get(position).get("name"));
holder.textview3.setText(datas.get(position).get("code"));
holder.textView2.setText(datas.get(position).get("desc"));
you are adding hash map in the array list but in the adapter you are trying to get data from the hash map, instead of that you need to take value from arraylist which will return hashmap object and from that object you need to get value for your keys.
hope this will help.

How to get the value of clicked list item

I just want to get the value of clicked list item,
i.e if list contains apple,ball,cat, then clicked on apple then it gives value as apple, ,In the below code I am using inner class base adapter to display the data.
public class RecordsActivity extends Activity implements
OnItemClickListener
{
ListView listProduct;
ListAdapter adapter;
TextView UserName,Date;
ArrayList<String> billDate = new ArrayList<String>();
ArrayList<String> billNo = new ArrayList<String>();
ArrayList<String >partyName=new ArrayList<String>();
ArrayList<String> billAmount = new ArrayList<String>();
ArrayList<String >receipt=new ArrayList<String>();
ArrayList<String >balance=new ArrayList<String>();
ArrayList<String> week = new ArrayList<String>();
ArrayList<String> amount = new ArrayList<String>();
String get_name,get_date,Name;
String GetAmnt;
Dialog dialog;
AlertDialog alertDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_records);
UserName=(TextView) findViewById(R.id.txt_disuser);
Intent usr=getIntent();
get_name=usr.getStringExtra("user");
UserName.setText(get_name);
Date=(TextView) findViewById(R.id.txt_disdate);
Intent dt=getIntent();
get_date=dt.getStringExtra("date");
Date.setText(get_date);
Intent id =getIntent();
Name=id.getStringExtra("name");
listProduct=(ListView) findViewById(R.id.ListViewFilledRecrd);
listProduct.setAdapter(adapter);
/*listProduct.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
listProduct.setClickable(true);
String data = (String)listProduct.getItemAtPosition(arg2);
Toast.makeText(getApplicationContext(),data,
Toast.LENGTH_SHORT).show();
}
});*/
}
protected void onResume()
{
getAllProduct();
super.onResume();
}
public void getAllProduct(){
SQLiteDatabase db = this.getDB();
Cursor c;
//c=db.rawQuery("SELECT * FROM RECORDS", null);
c=db.rawQuery("SELECT * FROM RECORDS WHERE PARTY_NAME = '" + Name +
"' ", null);
String
BILL_DATE,BILL_NO,PARTY_NAME,BILL_AMOUNT,RECEIPT,BALANCE,WEEK,AMOUNT;
if(c.moveToFirst())
{
do
{
BILL_DATE = c.getString(1);
BILL_NO=c.getString(2);
PARTY_NAME=c.getString(3);
BILL_AMOUNT=c.getString(4);
RECEIPT=c.getString(5);
BALANCE=c.getString(6);
WEEK=c.getString(7);
AMOUNT=c.getString(8);
billDate.add(BILL_DATE);
billNo.add(BILL_NO);
partyName.add(PARTY_NAME);
billAmount.add(BILL_AMOUNT);
receipt.add("RECEIPT");
balance.add(BALANCE);
week.add(WEEK);
amount.add(AMOUNT);
} while (c.moveToNext());
}
DisplyRecords dsptProd=new
DisplyRecords(RecordsActivity.this,billDate,billNo,partyName,
billAmount,receipt,balance,week,amount);
listProduct.setAdapter(dsptProd);
listProduct.setOnItemClickListener(this);
c.close();
db.close();
}
private SQLiteDatabase getDB()
{
String DB_NAME = "odsr.db";
return openOrCreateDatabase(DB_NAME, SQLiteDatabase.OPEN_READWRITE,
null);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
}
}
class DisplyRecords extends BaseAdapter
{
Context c;
ArrayList<String > BILLDATE;
ArrayList<String>BILLNO;
ArrayList<String> PARTYNAME;
ArrayList<String>BILLAMOUNT;
ArrayList<String>RECEIPT;
ArrayList<String> BALANCE;
ArrayList<String>WEEK;
ArrayList<String>AMOUNT;
public DisplyRecords(RecordsActivity recordsactivity,ArrayList<String>
billDate, ArrayList<String> billNo, ArrayList<String>
partyName,ArrayList<String> billAmount, ArrayList<String> receipt,
ArrayList<String> balance, ArrayList<String> week,ArrayList<String> amount)
{
this.c=recordsactivity;
this.BILLDATE=billDate;
this.BILLNO=billNo;
this.PARTYNAME=partyName;
this.BILLAMOUNT=billAmount;
this.RECEIPT=receipt;
this.BALANCE=balance;
this.WEEK=week;
this.AMOUNT=amount;
//TODO Auto-generated constructor stub
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return BILLDATE.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(final int pos, View row, ViewGroup parent)
{
View child=row;
LayoutInflater layoutinflater;
if(child==null)
{
layoutinflater=(LayoutInflater)
c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
child = layoutinflater.inflate(R.layout.list_product,null);
}
TextView txt_billdate=(TextView) child.findViewById(R.id.txt_bill_date);
TextView txt_billno=(TextView) child.findViewById(R.id.txt_bill_no);
TextView txt_partyname=(TextView)
child.findViewById(R.id.txt_party_name);
TextView txt_billamt=(TextView)
child.findViewById(R.id.txt_bill_amount);
TextView txt_receipt=(TextView) child.findViewById(R.id.txt_receipt);
TextView txt_balance=(TextView) child.findViewById(R.id.txt_balance);
TextView txt_wk=(TextView) child.findViewById(R.id.txt_week);
TextView txt_amount=(TextView) child.findViewById(R.id.txt_amount);
txt_billdate.setText(BILLDATE.get(pos));
txt_billno.setText(BILLNO.get(pos));
txt_partyname.setText(PARTYNAME.get(pos));
txt_billamt.setText(BILLAMOUNT.get(pos));
txt_receipt.setText(RECEIPT.get(pos));
txt_balance.setText(BALANCE.get(pos));
txt_wk.setText(WEEK.get(pos));
txt_amount.setText(AMOUNT.get(pos));
// TODO Auto-generated method stub
return child;
}
}

A few assumptions here, your actual fields do not need to be ArrayList's since each query returns a single row item from the db, i create a master object with Strings to represent the data...
So here is how i would do it, you need to re structure your data
First i would change your data to a :
public class ParentObject {
public String BILLDATE ;
public String BILLNO ;
public String PARTYNAME ;
public String BILLAMOUNT ;
public String RECEIPT ;
public String BALANCE ;
public String WEEK ;
public String AMOUNT ;
}
UPDATE
then i would change my Activity to:
public class RecordsActivity extends Activity implements OnItemClickListener{
ListView listProduct;
ListAdapter adapter;
TextView UserName,Date;
// your new parent object ArrayList, much cleaner
List<ParentObject> parentObjects;
String get_name,get_date,Name;
String GetAmnt;
Dialog dialog;
AlertDialog alertDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_records);
UserName=(TextView) findViewById(R.id.txt_disuser);
Intent usr=getIntent();
get_name=usr.getStringExtra("user");
UserName.setText(get_name);
Date=(TextView) findViewById(R.id.txt_disdate);
Intent dt=getIntent();
get_date=dt.getStringExtra("date");
Date.setText(get_date);
Intent id =getIntent();
Name=id.getStringExtra("name");
listProduct=(ListView) findViewById(R.id.ListViewFilledRecrd);
listProduct.setAdapter(adapter);
listProduct.setOnItemClickListener(this);
}
protected void onResume(){
getAllProduct();
super.onResume();
}
public void getAllProduct(){
SQLiteDatabase db = this.getDB();
Cursor c;
//c=db.rawQuery("SELECT * FROM RECORDS", null);
c=db.rawQuery("SELECT * FROM RECORDS WHERE PARTY_NAME = '" + Name + "' ", null);
String BILL_DATE,BILL_NO,PARTY_NAME,BILL_AMOUNT,RECEIPT,BALANCE,WEEK,AMOUNT;
if(c.moveToFirst()){
// initialize the parent arrayList
parentObjects = new ArrayList<ParentObject>();
do{
// initialize a single object
ParentObject parentObject = new ParentObject();
// fill in its data
parentObject.BILL_DATE = c.getString(1);
parentObject.BILL_NO=c.getString(2);
parentObject.PARTY_NAME=c.getString(3);
parentObject.BILL_AMOUNT=c.getString(4);
parentObject.RECEIPT=c.getString(5);
parentObject.BALANCE=c.getString(6);
parentObject.WEEK=c.getString(7);
parentObject.AMOUNT=c.getString(8);
// add it to your list
parentObjects.add(parentObject);
} while (c.moveToNext());
}
// pass the List<ParentObject> into your adapter
DisplyRecords dsptProd= new DisplyRecords(RecordsActivity.this, (ArrayList<ParentObject>)parentObjects);
listProduct.setAdapter(dsptProd);
listProduct.setOnItemClickListener(this);
c.close();
db.close();
}
private SQLiteDatabase getDB(){
String DB_NAME = "odsr.db";
return openOrCreateDatabase(DB_NAME, SQLiteDatabase.OPEN_READWRITE,
null);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
// access to all your data through the parentObject
ParentObject data = (ParentObject) listProduct.getItemAtPosition(position);
// access all fields for this parent
Toast.makeText(RecordsActivity.this, "data: "+ data.BILL_DATE, + " ," + data.BILL_NO, " , etc", Toast.LENGTH_LONG).show();
}
}
and then update your Adapter to handle the List
class DisplyRecords extends BaseAdapter {
Context c;
List<ParentObject> parentObjects;
public DisplyRecords(Context context, ArrayList<ParentObject> parentObjects){
this.c=context;
this.parentObjects = parentObjects;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return parentObjects.size();
}
#Override
public Object getItem(int position) {
return parentObjects.get(position); // always return this parent
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(final int pos, View row, ViewGroup parent){
// You should implement the ViewHolder pattern, this is not doing that...
View child=row;
LayoutInflater layoutinflater;
if(child==null){
layoutinflater=(LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
child = layoutinflater.inflate(R.layout.list_product,null);
}
TextView txt_billdate=(TextView) child.findViewById(R.id.txt_bill_date);
TextView txt_billno=(TextView) child.findViewById(R.id.txt_bill_no);
TextView txt_partyname=(TextView) child.findViewById(R.id.txt_party_name);
TextView txt_billamt=(TextView) child.findViewById(R.id.txt_bill_amount);
TextView txt_receipt=(TextView) child.findViewById(R.id.txt_receipt);
TextView txt_balance=(TextView) child.findViewById(R.id.txt_balance);
TextView txt_wk=(TextView) child.findViewById(R.id.txt_week);
TextView txt_amount=(TextView) child.findViewById(R.id.txt_amount);
ParentObject parentObject = parentObjects.get(pos);
txt_billdate.setText(parentObject.BILLDATE);
txt_billno.setText(parentObject.BILLNO.);
txt_partyname.setText(parentObject.PARTYNAME);
txt_billamt.setText(parentObject.BILLAMOUNT);
txt_receipt.setText(parentObject.RECEIPT);
txt_balance.setText(parentObject.BALANCE);
txt_wk.setText(parentObject.WEEK);
txt_amount.setText(parentObject.AMOUNT);
// TODO Auto-generated method stub
return child;
}
}

Update listview when run onResume() in Android

I create a listview get all contact from address book of Android. I try to update listview by onResume() but It's not working.
Here is my code:
public class Display extends Activity implements OnItemClickListener{
List<String> name1 = new ArrayList<String>();
List<String> phno1 = new ArrayList<String>();
List<String> email1 = new ArrayList<String>();
MyAdapter ma ;
ListView lv;
int countContact;
TextView textViewManyCount;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.display);
getAllContacts(this.getContentResolver());
lv= (ListView) findViewById(R.id.lv);
ma = new MyAdapter();
lv.setAdapter(ma);
lv.setOnItemClickListener(this);
lv.setItemsCanFocus(false);
lv.setTextFilterEnabled(true);
textViewManyCount = (TextView) findViewById(R.id.textViewManyCount);
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
}
public void getAllContacts(ContentResolver cr) {
Cursor phones = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");
countContact = phones.getCount();
while (phones.moveToNext())
{
String name=phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
String email = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
System.out.println(".................."+phoneNumber);
name1.add(name);
phno1.add(phoneNumber);
email1.add(email);
}
phones.close();
}
class MyAdapter extends BaseAdapter implements CompoundButton.OnCheckedChangeListener
{ private SparseBooleanArray mCheckStates;
LayoutInflater mInflater;
TextView textViewName,textViewPhone,textViewEmail;
MyAdapter()
{
mCheckStates = new SparseBooleanArray(name1.size());
mInflater = (LayoutInflater)Display.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return name1.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi=convertView;
if(convertView==null)
vi = mInflater.inflate(R.layout.list_user, null);
textViewName = (TextView) vi.findViewById(R.id.textViewName);
textViewPhone = (TextView) vi.findViewById(R.id.textViewPhone);
textViewEmail = (TextView) vi.findViewById(R.id.textViewEmail);
textViewName.setText("Name :"+ name1.get(position));
textViewPhone.setText("Phone No :"+ phno1.get(position));
textViewEmail.setText("Email :"+ email1.get(position));
textViewManyCount.setText("Contacts: "+countContact);
return vi;
}
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
}
}
When I running app, It's load all contact but when I click button Home and change some information in Address book then click icon app to open app again. And onResume() method not working.
Here my onResume()
#Override
protected void onResume()
{
super.onResume();
if (lv != null)
{
updateData();
}
}
private void updateData()
{
getAllContacts(this.getContentResolver());
ma = new MyAdapter();
lv.setAdapter(ma);
ma.notifyDataSetChanged();
}
So some body help me! Plz!

Try by Replacing your updateData():
private void updateData()
{
getAllContacts(this.getContentResolver());
ma.notifyDataSetChanged();
}

You may be referencing an old ListView (lv) that is not the new ListView you see when you resume your Activity. Try getting the reference to lv again using Activity.findViewById(R.id.xxxx) in onResume().
You could also try reusing the old adapter instead of creating a brand new one (by clearing it and updating it's content). If you're reusing the old adapter, just make sure you give the old adapter to the new ListView using ListView.setAdapter(ma).
You should also have MyAdapter.getItemId(int position) return position instead of 0.

Android - How to get checkbox to work with sqlite database

I am trying to create a listview with checkbox, and user can check the options to select which customer to pay the particular expense. I created the listview with checkbox, the problem is how to access database from my custom adapter class? It seems like i can't declare my sqlite database in that class. But i would like to add the expense to checked customer by referring to the customerId. How can i do that? I stuck in onCheckChanged method in my custom adapter class. Sorry for my bad english. Thanks
This is my AddExpense class:
public class AddExpense extends ListActivity implements OnClickListener {
EditText expenseName;
Spinner expenseType;
EditText expensePrice;
EditText expenseQuantity;
EventController controller = new EventController(this);
Button btnadd;
ListView lv;
#SuppressWarnings("unchecked")
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.addexpense);
expenseName = (EditText) findViewById(R.id.expenseName);
expenseType = (Spinner) findViewById(R.id.expenseType);
// Create an ArrayAdapter using the string array and a default spinner
// layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.type, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
expenseType.setAdapter(adapter);
expensePrice = (EditText) findViewById(R.id.expensePrice);
expenseQuantity = (EditText) findViewById(R.id.expenseQuantity);
btnadd = (Button) findViewById(R.id.btnaddexp);
btnadd.setOnClickListener(this);
#SuppressWarnings("rawtypes")
ArrayList person = new ArrayList();
person.clear();
Intent objIntent = getIntent();
String eventId = objIntent.getStringExtra("eventId");
String query = "SELECT * FROM friends WHERE friendEvent = " + eventId;
Cursor c1 = controller.selectQuery(query);
if (c1 != null & c1.getCount() != 0) {
if (c1.moveToFirst()) {
do {
getParticipant person1 = new getParticipant();
person1.setfriendId(c1.getString(c1
.getColumnIndex("friendId")));
person1.setfriendName(c1.getString(c1.getColumnIndex("friendName")));
person.add(person1);
} while (c1.moveToNext());
}
}
c1.close();
ListAdapter listadapter = new ListAdapter(AddExpense.this,person);
adapter.notifyDataSetChanged();
setListAdapter(listadapter);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
HashMap<String, String> queryValues = new HashMap<String, String>();
Intent objIntent = getIntent();
String eventId = objIntent.getStringExtra("eventId");
queryValues.put("eventId", eventId);
queryValues.put("expenseName", expenseName.getText().toString());
queryValues
.put("expenseType", expenseType.getSelectedItem().toString());
queryValues.put("expensePrice", expensePrice.getText().toString());
queryValues
.put("expenseQuantity", expenseQuantity.getText().toString());
controller.insertExpense(queryValues);
this.callHomeActivity(v);
finish();
}
public void callHomeActivity(View view) {
super.onResume();
}
This is my custom adapter code:
public class ListAdapter extends BaseAdapter implements OnCheckedChangeListener{
Context ctx;
LayoutInflater lInflater;
ArrayList<getParticipant> objects;
ListAdapter(Context context, ArrayList<getParticipant> friendList) {
ctx = context;
objects = friendList;
lInflater = (LayoutInflater) ctx
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return objects.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return objects.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
getParticipant person = objects.get(position);
View view = convertView;
if (view == null) {
view = lInflater.inflate(R.layout.view_expenses_participant_entry, parent, false);
}
TextView friendId = (TextView)view.findViewById(R.id.friendId);
friendId.setText(person.getfriendId());
TextView friendName = (TextView)view.findViewById(R.id.friendName);
friendName.setText(person.getfriendName());
CheckBox cbperson = (CheckBox)view.findViewById(R.id.list_checkbox);
cbperson.setOnCheckedChangeListener(this);
return view;
}
#Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
// TODO Auto-generated method stub
}

why can't you access your database here, You have Context of your activity in ctx variable, you can access db in OnCheckedChanged() method, See below
#Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
// TODO Auto-generated method stub
YOURSQLITEdatabase db = new YOURSQLITEdatabse(ctx);
db.performYourOperationsHere();
db.close();
}

Cursor Adapter should simplify things for you or you can add the id as tag in the check box view, take a look at setTag and then get the tag in your onCheckedChanged and
do operations in onCheckedChanged OR
keep storing it in an array or removing it depending on weather it's checked or unchecked and use this array of ids to perform db operations when adding expense on click of submit button, if you have something like that on your screen as doing db operation on every click will slow things for the user
Am not sure if you are doing this the correct way, Better would be if you study cursor adapters first.

Listvew with textview and checkbox

I want to have a listview with textview + check box. I was able to create the listview. I can capture listview item select. However when I try to capture check box select, unselect I get a null pointer exception. How to write the setOnCheckedChangeListener() for the check box..
public class LocationActivity extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.locationmain);
ListView listview = (ListView) findViewById(R.id.listView1);
String selectQuery = "SELECT * FROM " + DatabaseHandler.TABLE_LOCATIONLABLES;
SQLiteDatabase db = new DatabaseHandler(this).getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
final List<String> locLables = new ArrayList<String>();
if(cursor != null){
if (cursor.moveToFirst()) {
do {
locLables.add(cursor.getString(1));
} while (cursor.moveToNext());
}
}
//String[] locLables = new String[] {"Home","University","Office"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.locationmain_entry,R.id.textView12, locLables);
//cb gives a null pointer exception
CheckBox cb = (CheckBox) listview.findViewById(R.id.checkBox12);
cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked){
System.out.println("selected");
}else if(!isChecked){
System.out.println("not selected");
}
}
});
listview.setAdapter(adapter);
listview.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), locLables.get(arg2), Toast.LENGTH_SHORT).show();
}
});
}

You can maintain seperate adpater class so that you can achive this easily....
public class bsAdapter extends BaseAdapter
{
Activity cntx;
public bsAdapter(Activity context)
{
// TODO Auto-generated constructor stub
this.cntx=context;
}
public int getCount()
{
// TODO Auto-generated method stub
return listview_arr.length;
}
public Object getItem(int position)
{
// TODO Auto-generated method stub
return listview_arr[position];
}
public long getItemId(int position)
{
// TODO Auto-generated method stub
return listview_array.length;
}
public View getView(final int position, View convertView, ViewGroup parent)
{
View row=null;
LayoutInflater inflater=cntx.getLayoutInflater();
row=inflater.inflate(R.layout.search_list_item, null);
TextView tv=(TextView)row.findViewById(R.id.title);
CheckBox cb=(CheckBox)row.findViewById(R.id.cb01);
tv.setText(listview_arr[position]);
cb.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
if(cb.ischecked)
{
//ur code
}
else //ur code
}
});
return row;
}
}

Do not use listview.findViewById(), just use findViewById() like you did for your list.
Unless the checkbox is part of each of the list items, in which case you would have to access the checkbox from within the getView() of your ListAdapter.