Develop Reference

Android and delete items from ListView and sqlite database

I'm trying to remove items from listView and the database, but I can not cope. I throw the code, and I hope to help. I throw code with showList on screen and save to database sqlite. Any idea? I am also a beginner any help would be greatly appreciated. I was looking at tutorials and removal does not work for me. I have no idea why. And how do though to purge my list after exiting application? Because when I go to the application's data in listView are still visible.
public class PropertyListAdapter extends BaseAdapter {
Context context;
ArrayList<Property> propertyList;
public PropertyListAdapter(Context context, ArrayList<Property> list) {
this.context = context;
propertyList = list;
}
#Override
public int getCount() {
return propertyList.size();
}
#Override
public Object getItem(int position) {
return propertyList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup arg2) {
View vi = convertView;
Property propertyListItems = propertyList.get(position);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vi = inflater.inflate(R.layout.property_list_row, null);
}
TextView tvSlNo = (TextView) convertView.findViewById(R.id.tv_slno);
tvSlNo.setText(String.valueOf(propertyListItems.getId()));
TextView tvName1 = (TextView) convertView.findViewById(R.id.tv_name1);
tvName1.setText(propertyListItems.getType());
TextView tvName = (TextView) convertView.findViewById(R.id.tv_name);
tvName.setText(propertyListItems.getAddress());
TextView tvPhone = (TextView) convertView.findViewById(R.id.tv_phone);
tvPhone.setText(String.valueOf(propertyListItems.getValue()));
TextView tvPhone1 = (TextView) convertView.findViewById(R.id.tv_phone1);
tvPhone1.setText(String.valueOf(propertyListItems.getDebt()));
TextView tvName2 = (TextView) convertView.findViewById(R.id.tv_name2);
tvName2.setText(propertyListItems.getNotes());
Button deletePropertyItem = (Button) vi.findViewById(R.id.DeletePropertyListItem);
deletePropertyItem.setTag(position);
deletePropertyItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Integer index = (Integer)v.getTag();
propertyList.remove(position);
notifyDataSetChanged();
}
});
return vi;
}
db = new MeetingsDataBaseHelper(this);
showList();
add1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Double value1, debt;
String editValueDb1,editDebtDb1;
final Integer idEncounterToPass = AppMainScreen.getMeetingListClickedItem().getEncounter_id();
String type = editTextTypeProperty.getText().toString();
String address = editAddresse1.getText().toString();
// Double value1 = Double.valueOf(editValue1.getText().toString());
String editValue1String = ReportMainScreen.editValue1.getText().toString();
if (editValue1String.length() > 0)
{
value1 = Double.valueOf(editValue1String);
} else {
value1 = Double.valueOf("0.00");
}
// Double debt = editViewDebt1.getText().toString();
String editDebtString = ReportMainScreen.editViewDebt1.getText().toString();
if (editDebtString.length() > 0)
{
debt = Double.valueOf(editDebtString);
} else {
debt = Double.valueOf("0.00");
}
String notes = editNotesProperty.getText().toString();
String encounter_id = String.valueOf(idEncounterToPass);
String posted = "0";
String query = "INSERT INTO property(type,address,value,debt,notes,encounter_id,posted) values ('"
+ type + "','" + address + "','" + value1 + "','" + debt + "','" + notes + "','" + encounter_id + "','" + posted + "')";
db.executeQuery(query);
showList();
editTextTypeProperty.setText("");
editAddresse1.setText("");
editValue1.setText("");
editViewDebt1.setText("");
editNotesProperty.setText("");
}
});
private void showList() {
ArrayList<Property> propertyList = new ArrayList<Property>();
propertyList.clear();
String query = "SELECT * FROM property ";
Cursor c1 = db.selectQuery(query);
if (c1 != null && c1.getCount() != 0) {
if (c1.moveToFirst()) {
do {
Property propertyListItems = new Property();
propertyListItems.setId(Integer.valueOf(c1.getString(c1.getColumnIndex("id"))));
propertyListItems.setType(c1.getString(c1.getColumnIndex("type")));
propertyListItems.setAddress(c1.getString(c1.getColumnIndex("address")));
propertyListItems.setValue(Double.valueOf(c1.getString(c1.getColumnIndex("value"))));
propertyListItems.setDebt(Double.valueOf(c1.getString(c1.getColumnIndex("debt"))));
propertyListItems.setNotes(c1.getString(c1.getColumnIndex("notes")));
propertyList.add(propertyListItems);
} while (c1.moveToNext());
}
}
c1.close();
PropertyListAdapter propertyListAdapter = new PropertyListAdapter(ReportMainScreen.this, propertyList);
first_list_view.setAdapter(propertyListAdapter);
propertyListAdapter.notifyDataSetChanged(); // TODO check this reg. clearing subtables
// propertyList.remove(propertyListAdapter);
}

Delete on db
private void DeleteItemFormList() {
Property property = new Property();
ArrayList<Property> propertyList = new ArrayList<Property>();
propertyList.clear();
int id = property.getId();
String delQuery = "DELETE FROM Property WHERE id='"+id+"' ";
db.executeQuery(delQuery);
showList();
PropertyListAdapter propertyListAdapter = new PropertyListAdapter(ReportMainScreen.this, propertyList);
first_list_view.setAdapter(propertyListAdapter);
propertyListAdapter.notifyDataSetChanged(); // TODO check this reg. clearing subtables
// propertyList.remove(propertyListAdapter);
}

I think You need to pass Id which is autoIncreament instead of possition.
ie.
int index=propertyList.get(position).get(Id);
Button deletePropertyItem = (Button) vi.findViewById(R.id.DeletePropertyListItem);
deletePropertyItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
propertyList.remove(index);
notifyDataSetChanged();
}
});

edittext value changes position while scrolling in custom listview in android

I have created a custom list view with 6 colomns. Each row is populated.
the first 3 fields are textviews,which are filled from db. Then a spinner and the last two edittexts.
i want to enter values to edittexts and spinner.. this much is ok.
The problem is when i enter values in edittext and after that if i scroll the list, the values entered in edittext changes in position. if i entered in first row, after scrolling it will be in last row or any other.. how i can solve this.. Need help pls..
My adapter class is given below.
public class CustomTransAdapter extends BaseAdapter {
public ArrayList<retrieveTrans> ret_arrArrayList;
private List<retrieveTrans> ret_translist;
private LayoutInflater inflater;
ArrayAdapter<String> adapterspin;
String time, currntdate, status;
String Maxcramnt, balamount;
double Mamount, Bamount, actualamnt;
String idpref, str_agent_id2, accno;
int trcheck;
int d = 0;
String tramnt = "", remarks = "";
Context context;
int count;
public CustomTransAdapter(NewTransactionSheet newTransactionSheet,
int transListPop, List<retrieveTrans> translist) {
// TODO Auto-generated constructor stub
super();
this.ret_translist = translist;
inflater = LayoutInflater.from(newTransactionSheet);
this.ret_arrArrayList = new ArrayList<retrieveTrans>();
this.ret_arrArrayList.addAll(translist);
this.context = newTransactionSheet;
String[] items = new String[] { "Type", "credit", "debit" };
final ArrayAdapter<String> adapterspin = new ArrayAdapter<String>(
newTransactionSheet, android.R.layout.simple_spinner_item,
items);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return ret_translist.size();
}
#Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return ret_translist.get(arg0);
}
#Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
class ViewHolder {
TextView acc_txt, name_txt, balAmnt_txt;
Spinner trans_spinner;
EditText transAmnt_edittxt, remarks_edittxt;
Button save;
}
#Override
public View getView(final int pos, View cv, ViewGroup arg2) {
// TODO Auto-generated method stub
try {
final ViewHolder holder;
View row = cv;
int p = pos;
Log.e("position of getview:", "" + p);
if (cv == null) {
cv = inflater.inflate(R.layout.trans_pop_list, null);
holder = new ViewHolder();
holder.acc_txt = (TextView) cv
.findViewById(R.id.txtTransAccNo_pop);
holder.name_txt = (TextView) cv
.findViewById(R.id.txtTransName_pop);
holder.balAmnt_txt = (TextView) cv
.findViewById(R.id.txtTransBalAmnt_pop);
holder.trans_spinner = (Spinner) cv
.findViewById(R.id.spinTrans_Type);
holder.transAmnt_edittxt = (EditText) cv
.findViewById(R.id.editTransAmnt_pop);
holder.save = (Button) cv.findViewById(R.id.save);
holder.remarks_edittxt = (EditText) cv
.findViewById(R.id.editRemarks_pop);
cv.setTag(holder);
} else {
holder = (ViewHolder) cv.getTag();
}
holder.acc_txt.setText("" + ret_translist.get(pos).getRetAccNo());
String hari = holder.acc_txt.getText().toString();
holder.name_txt.setText("" + ret_translist.get(pos).getRetName());
holder.balAmnt_txt.setText(""
+ ret_translist.get(pos).getRetBalAmnt());
String[] items = new String[] { "Type", "credit", "debit" };
final ArrayAdapter<String> adapterspin = new ArrayAdapter<String>(
context, android.R.layout.simple_spinner_item, items);
final String haris = holder.name_txt.getText().toString();
holder.trans_spinner.setAdapter(adapterspin);
/* ******************* Save button Click **************** */
holder.save.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
int position = pos;
final String accno = holder.acc_txt.getText().toString();
final String tramnt = holder.transAmnt_edittxt.getText()
.toString();
String remarks = holder.remarks_edittxt.getText()
.toString();
final String spinner = holder.trans_spinner
.getSelectedItem().toString();
Log.e("accno:", "" + accno);
Log.e("name :", "" + tramnt);
Log.e("position:", "" + position);
Log.e("remark:", "" + remarks);
Log.e("spinner:", "" + spinner);
/****************** time and date **********************/
// ----------Time----------
Calendar c = Calendar.getInstance();
time = (c.get(Calendar.HOUR) + ":" + c.get(Calendar.MINUTE)
+ ":" + c.get(Calendar.SECOND));
Log.e("Current Time", " " + time);
// -----------Date---------
Date now = new Date();
Date alsoNow = Calendar.getInstance().getTime();
currntdate = new SimpleDateFormat("M-d-yyyy").format(now);
Log.e("Date ", " " + currntdate);
status = new String("y");
if (tramnt.equals("")) {
Toast.makeText(arg0.getContext(),
"enter Transaction amount", 5000).show();
Log.e("if cndition", " " + tramnt);
} else if (spinner.equals("type")) {
Toast.makeText(arg0.getContext(),
"enter Transaction type", 5000).show();
Log.e("if cndition", " " + tramnt);
}
else {
if (remarks.equals("")) {
remarks = "null";
}
/************ declaration for dbcall *********************/
AccountDBAdapter db = new AccountDBAdapter(context);
NewTransactionSheet ts = new NewTransactionSheet();
try {
db.open();
String accid = db.getAccID(accno);
String Maxcramnt = db.getMaxCrAmnt(accno);
db.close();
Mamount = Double.parseDouble(Maxcramnt);
Bamount = Double.parseDouble(tramnt);
actualamnt = Mamount - Bamount;
balamount = "" + actualamnt;
db.open();
db.close();
/* Log.e("c value", " " +actualamnt); */
Log.e("tramnt", " " + tramnt);
Log.e("if cndition out", " " + tramnt);
db.open();
db.update_MaxCrAmnt(balamount, accid);
db.close();
actualamnt = 0;
db.open();
String userId = "" + 2;
db.insertTransactionTable(accid.toString(),
currntdate.toString(), spinner.toString(),
tramnt.toString(), userId.toString(),
time.toString(), remarks.toString(),
status.toString());
db.close();
holder.save.setText("SAVED");
holder.save.setBackgroundColor(Color.DKGRAY);
// }
} catch (Exception e) {
Log.e("error", e.getMessage());
}
}
}
});
} catch (Exception c) {
Log.e("adapter error", "" + c.getMessage());
}
return cv;
}
}
Working on this for many days... need help.. Thanks in advance.

reloading ListView data from Adapter class in Onclick of Button

I am trying to build up a application which has a custom adapter and all ListView row has three Button. I have onClick operation for all Button in custom adapter. I can change the data source when Button clicked however I can not reload the data from custom adapter.
public class CallListViewCustomAdapter extends ArrayAdapter<Person> {
Context context;
SQLiteDatabase sb;
private static final String SAMPLE_DB_NAME = "androidData.sqlite";
private static final String SAMPLE_TABLE_NAME = "calldetails";
int layoutResourceId;
ArrayList<Person> data = new ArrayList<Person>();
public CallListViewCustomAdapter(Context context, int layoutResourceId, ArrayList<Person> data) {
super(context, layoutResourceId,data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
public void refresh(ArrayList<Person>list)
{
data = list;
notifyDataSetChanged();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = null;
View row = convertView;
final int fPosition = position;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
final WeatherHolder holder = new WeatherHolder();
holder.phoneNumber = (TextView)row.findViewById(R.id.number);
holder.fname = (TextView)row.findViewById(R.id.fName);
holder.call = (Button)row.findViewById(R.id.callButton);
holder.skip = (Button)row.findViewById(R.id.skip);
holder.called = (Button)row.findViewById(R.id.called);
holder.called.setTag(position);
Person weather = data.get(position);
holder.phoneNumber.setText(weather.number);
holder.fname.setText(weather.fName);
holder.call.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
holder.called.setVisibility(View.VISIBLE);///error comes
holder.skip.setVisibility(View.VISIBLE);///error comes
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + data.get(fPosition).number));
callIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(callIntent);
}
});
holder.called.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
//business logic for data source change
refresh(data);///I want listview change here
sb.close();
Log.v("ONMESSAGE", "HARD");
}
});
// holder.desc= (TextView)row.findViewById(R.id.txtViewDescription);
// holder.switchState = (Switch)row.findViewById(R.id.switch1);
row.setTag(holder);
}
return row;
}
static class WeatherHolder
{
TextView phoneNumber;
TextView fname;
Switch switchState;
Button call,skip,called;
}
}
Fragment where The list is used
public class NewFragment extends Fragment{
View rootView;
ProgressDialog pDialog;
private ListView listView1;
CallListViewCustomAdapter adapter;
private static final String SAMPLE_DB_NAME = "androidData.sqlite";
private SQLiteDatabase sampleDB;
ArrayList<Person>list;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
rootView = inflater.inflate(R.layout.newfragment, container, false);
initDB();
list = new ArrayList<Person>();
new CallLogDetails().execute();
return rootView;
}
public int checkTable() {
int return_var = 0;
sampleDB = getActivity().openOrCreateDatabase(SAMPLE_DB_NAME, Context.MODE_PRIVATE, null);
Cursor cc = sampleDB.rawQuery("SELECT * FROM " + "calldetails", null);
if (cc != null){
if (cc.moveToFirst()) {
do {
return_var = cc.getInt(1);
} while (cc.moveToNext());
}
}
return return_var;
}
public void parseandStoreOpearation()
{
try{
CSVReader reader = new CSVReader(new InputStreamReader(getActivity().getAssets().open("batch2.csv")));
String [] nextLine;
sampleDB = getActivity().openOrCreateDatabase(SAMPLE_DB_NAME, Context.MODE_PRIVATE, null);
while ((nextLine = reader.readNext()) != null) {
//Log.v("ONMESSAGE", "YES");
Log.v("ONMESSAGE", "Name: [" + nextLine[0] + "]\nAddress: [" + nextLine[1] + "]\nEmail: [" + nextLine[2] + "]");
if(!nextLine[0].equals("First Name"))
{
//Person newPerson = new Person(nextLine[0],nextLine[1], nextLine[2], 1);
ContentValues cv = new ContentValues();
cv.put("callNumber", nextLine[2]);
cv.put("fName", nextLine[0]);
cv.put("lName", nextLine[1]);
cv.put("callflag", 1);
sampleDB.insert("calldetails", null, cv);
//list.add(newPerson);
}
}
}
catch(Exception e)
{
Log.v("ONMESSAGE", "EXCEPTION " + e.toString());
}
}
public ArrayList<Person> getList()
{
ArrayList<Person> arr = new ArrayList<Person>();
sampleDB= getActivity().openOrCreateDatabase(SAMPLE_DB_NAME, Context.MODE_PRIVATE, null);
Cursor cc = sampleDB.rawQuery("SELECT * FROM " +"calldetails", null);
if(cc != null)
if(cc.moveToFirst()){
do
{ Log.v("Datas",cc.getString(2)+ " " +cc.getString(3) + " " + cc.getString(1) + " " + cc.getInt(4));
Person ph = new Person(cc.getString(2), cc.getString(3), cc.getString(1),cc.getInt(4),cc.getInt(0));
arr.add(ph);
}while(cc.moveToNext());
}
sampleDB.close();
Log.v("ONMESSAGE", new Integer(arr.size()).toString());
return arr;
}
private void initDB() {
sampleDB = getActivity().openOrCreateDatabase(SAMPLE_DB_NAME, Context.MODE_PRIVATE, null);
sampleDB.execSQL("CREATE TABLE IF NOT EXISTS " +
"calldetails" +" (callid INTEGER PRIMARY KEY AUTOINCREMENT,"+ "callNumber TEXT," +
" fName TEXT," + "lName TEXT," + "callflag INTEGER);");
}
private class CallLogDetails extends AsyncTask<Void,Void,Void>{
#Override
protected void onPreExecute(){
pDialog = new ProgressDialog(getActivity());
pDialog.setTitle("Processing");
pDialog.setMessage("Loading Number List");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
protected void onPostExecute(Void params){
super.onPostExecute(params);
pDialog.dismiss();
if(list.size() == 0)
{
list.add(new Person("No Data", "NO Data", "No Data", 0,0));
}
Collections.reverse(list);
if(adapter != null)
adapter.clear();
adapter = new CallListViewCustomAdapter(getActivity(),
R.layout.listview_row, list);
listView1 = (ListView)getActivity().findViewById(R.id.lvAlbumList);
listView1.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
final int arg2, long arg3) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Delete Record");
builder.setMessage("Do you want to delete the record?");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
if(list.size() > 0){
sampleDB=getActivity().openOrCreateDatabase(SAMPLE_DB_NAME, SQLiteDatabase.OPEN_READWRITE, null);
//sampleDB.execSQL("DELETE FROM "+ SAMPLE_DB_NAME + " " + "WHERE callDesc= " + desc);
//sampleDB.execSQL("DELETE FROM calldetails WHERE callDesc='"+desc+"';");
Toast.makeText(getActivity(), "Row Deleted", Toast.LENGTH_LONG).show();
sampleDB.close();
new CallLogDetails().execute();
}
else
Toast.makeText(getActivity(), "This is a default object. You can not delete this.", Toast.LENGTH_LONG).show();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
arg0.cancel();
}
});
builder.show();
return false;
}
});
listView1.setAdapter(adapter);
}
#Override
protected Void doInBackground(Void... arg0) {
list.clear();
if(checkTable() == 0)
{
parseandStoreOpearation();
}
list = getList();
Log.v("ONMESSAGE", "Doing");
return null;
}
}
}

For an ArrayAdapter, notifyDataSetChanged() only works if you use the add, insert, remove, and clear functions on the Adapter.
Try following code:
public void refresh(ArrayList<Person>list)
{
data.clear();
data.addAll(list);
this.notifyDataSetChanged();
}

Do something like this inside activity
CallListViewCustomAdapter thadapter=new CallListViewCustomAdapter(MainActivity.this, R.layout.list,numAl);
NumberList.setAdapter(thadapter);
#Override
public void onClick(View v) {
thadapter.notifyDataSetChanged();
}
});

Call notifyDataSetChanged() and recall adapter

Call notifyDataSetChanged() method to the ListView adapter object.

Creating custom listview from pre-existing arraylist

I'm obviously missing something in making this custom adapter. Basically, I've got code that grabs JSON from the site, then breaks it down into a ArrayList. I can do a .toString() and spit it all out onto a listview just fine, but everything I find on the net for creating a custom adapter creates the list inside of it. Is there a way to just supply your pre-created list? I've yet to make any headway on getting the custom one to work...but, as I said I can get the string to work just fine, so I'll include that code.
Here's my classes:
public class JSONEvents {
String eid;
String bid;
private String bname;
private String valid;
#Override
public String toString() {
return "Events [eid=" + eid + ", bid=" + bid + ", bname=" + bname
+ ", start=" + start + ", end=" + end + ", points=" + points
+ ", title=" + title + ", description=" + description
+ ", cat=" + cat + ", type=" + type + ", subtype=" + subtype
+ ", valid=" + valid + "]";
}
public String getEventInfo(String field){
if("eid".equals(field)){return eid;}
else if("bid".equals(field)){return bid;}
else if("bname".equals(field)){return bname;}
else if("valid".equals(field)){return valid;}
return "none";
}
}
public class JSONAdventures {
private String aid;
private String bid;
private String start;
private String valid;
#Override
public String toString() {
return "Adventures [aid=" + aid + ", bid=" + bid + ", start=" + start
+ ", end=" + end + ", points=" + points + ", title=" + title
+ ", description=" + description + ", cat=" + cat + ", type="
+ type + ", subtype=" + subtype + ", steps_comp=" + steps_comp
+ ", total_steps=" + total_steps + ", valid=" + valid + "]";
}
public String getEventInfo(String field){
if("aid".equals(field)){return aid;}
else if("bid".equals(field)){return bid;}
else if("start".equals(field)){return start;}
else if("valid".equals(field)){return valid;}
return "none";
}
}
public class JSONEandA {
private ArrayList<JSONEvents> events;
private ArrayList<JSONAdventures> adventures;
#Override
public String toString() {
return "ResponseHolder [events=" + events + ", adventures="
+ adventures + "]";
}
public ArrayList<JSONEvents> getJSONEvents() {
return events;
}
public ArrayList<JSONAdventures> getJSONAdventures() {
return adventures;
}
}
For the code in m activity:
List<JSONEvents> eventlist = new ArrayList<JSONEvents>();
try {
Gson googleJson = new Gson();
JSONEandA rh = googleJson.fromJson(example,
JSONEandA.class);
for (JSONEvents e : rh.getJSONEvents()) {
eventlist.add(e);
//eventlist.addAll(e);
// System.out.println(e.toString());
System.out.println(e.getEventInfo("eid"));
System.out.println(e.toString());
}
final ListView listview = (ListView) findViewById(R.id.eventlistview);
String[] values = new String[eventlist.size()];
eventlist.toArray(values);
// String[] values = new String[] {e.toString()};
final ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < values.length; ++i) {
list.add(values[i]);
}
final StableArrayAdapter adapter = new StableArrayAdapter(
Events.this,
android.R.layout.simple_list_item_1, list);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent,
final View view, int position, long id) {
final String item = (String) parent
.getItemAtPosition(position);
list.remove(item);
adapter.notifyDataSetChanged();
Toast.makeText(getApplicationContext(),
"Item Removed", Toast.LENGTH_LONG).show();
});
I've also pieced together an attempt at an adapter from various tutorials and such, but can't figure out how to tie it all together:
class EventAdapter extends ArrayAdapter<JSONEvents> {
private ArrayList<JSONEvents> items;
public EventAdapter(Context context, int textViewResourceId,
ArrayList<JSONEvents> items) {
super(context, textViewResourceId, items);
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list_events, null);
}
JSONEvents q = items.get(position);
if (q != null) {
TextView nameText = (TextView) v.findViewById(R.id.firstline);
TextView priceText = (TextView) v.findViewById(R.id.secondLine);
if (nameText != null) {
nameText.setText(q.getEventInfo("eid"));
}
if (priceText != null) {
priceText.setText(q.getEventInfo("bid"));
}
}
return v;
}
}
I would appreciate any help, thanks!

Did you put tha data into your adapter?
adapter.addAll(String[] data);
Or you could do it while creating adapter:
EventAdapter adapter = new EventAdapter(this, R.id.some_id, eventlist);

Display Data from a database in a listview with a arrayadapter

Hy guys!
I've got a problem. My app should display all routes in a listview. But there is something wrong with the arrayadapter. If i try my arrayadapter like this:
ArrayAdapter<DefineRoute> adapter = new ArrayAdapter<DefineRoute>(
this, android.R.layout.simple_list_item_1,verbindungen.getVerbindungen());
it works, but it only display the objectname of DefineRoute and i wanna display the output of the cursor.
Ithink i should try:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
this, android.R.layout.simple_list_item_1,verbindungen.getVerbindungen());
But here comes the error: Cannot resolve constructor ArrayAdapter
Here is my Acticity:
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated constructor stub
super.onCreate(savedInstanceState);
setContentView(R.layout.planausgabelayout);
//Aufruf der TextViews
TextView txtStart = (TextView)findViewById(R.id.txtAusgabeStart);
TextView txtZiel = (TextView)findViewById(R.id.txtAusgabeZiel);
TextView txtZeit = (TextView)findViewById(R.id.txtAusgabeZeit);
intent = getIntent();
txtStart.setText(intent.getStringExtra("StartHaltestelle"));
txtZiel.setText(intent.getStringExtra("ZielHaltestelle"));
txtZeit.setText(intent.getStringExtra("Zeit"));
getRoute();
}
public void getRoute() {
lvList = (ListView)findViewById(R.id.lvList);
Verbindungen verbindungen = new Verbindungen(this);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
this, android.R.layout.simple_list_item_1,verbindungen.getVerbindungen());
lvList.setAdapter(adapter);
}
Here is my Activity Define Route:
public class DefineRoute {
private String abfahrtszeit;
private String ankunftszeit;
private String dauer;
private String umstieg;
public DefineRoute(String abfahrtszeit, String ankunftszeit, String dauer, String umstieg)
{
this.abfahrtszeit = getAbfahrtszeit();
this.ankunftszeit = getAnkunftszeit();
this.dauer = getDauer();
this.umstieg = getUmstieg();
}
public String getAbfahrtszeit() {
return abfahrtszeit;
}
public String getAnkunftszeit() {
return ankunftszeit;
}
public String getDauer() {
return dauer;
}
public String getUmstieg() {
return umstieg;
}
}
Here is my Activity Verbindungen:
public class Verbindungen {
SQLiteDatabase db;
LinkedList<DefineRoute> route;
DefineRoute[] routeArray;
Context context;
DatabaseHelper myDbHelper = null;
public Verbindungen(Context context) {
route = new LinkedList<DefineRoute>();
this.context = context;
myDbHelper = new DatabaseHelper(context);
}
public DefineRoute[] getVerbindungen() {
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
myDbHelper.openDataBase();
}catch(SQLException sqle){
throw sqle;
}
db = myDbHelper.getReadableDatabase();
// Alle Daten der Datenbank abrufen mithilfe eines Cursors
Cursor cursor = db.rawQuery("SELECT strftime('%H:%M', f.abfahrt) AS Abfahrt," +
"strftime('%H:%M', f.ankunft) AS Ankunft," +
"strftime('%H:%M', strftime('%s',f.ankunft)- strftime('%s',f.abfahrt), 'unixepoch') AS Dauer," +
"r.name AS Route," +
"count(u.fahrt_id) AS Umstiege " +
"FROM scotty_fahrt f " +
"JOIN scotty_haltestelle start ON f.start_id = start.id " +
"JOIN scotty_haltestelle ziel ON f.ziel_id = ziel.id " +
"JOIN scotty_route r ON f.route_id = r.id " +
"LEFT OUTER JOIN scotty_umstiegsstelle u ON f.id = u.fahrt_id " +
"WHERE start.name = 'Linz/Donau Hbf (Busterminal)' " +
"AND ziel.name = 'Neufelden Busterminal (Schulzentrum)' " +
"GROUP BY u.fahrt_id",null);
cursor.moveToFirst();
int i=0;
while (cursor.moveToNext()){
//in this string we get the record for each row from the column "name"
i++;
}
routeArray = new DefineRoute[i];
cursor.moveToFirst();
int k =0;
while (cursor.moveToNext())
{
routeArray[k] = new DefineRoute(cursor.getString(0),cursor.getString(1),cursor.getString(2),
cursor.getString(3));
k++;
}
//here we close the cursor because we do not longer need it
//}
cursor.close();
myDbHelper.close();
return routeArray;
}
please help me.
Now i am creating a ArrayAdapter class where i define my ouput in the listview with:
public class RouteAdapter extends ArrayAdapter<DefineRoute>{
Activity context;
DefineRoute[] defineroute;
public RouteAdapter(Activity context, DefineRoute[] defineroute){
super(context, R.layout.layoutausgabe, defineroute);
this.defineroute = defineroute;
this.context = context;
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View row = inflater.inflate(R.layout.layoutausgabe,null);
TextView txZeit = (TextView)row.findViewById(R.id.txZeit);
TextView txDauer = (TextView)row.findViewById(R.id.txDauer);
TextView txUmstieg = (TextView)row.findViewById(R.id.txUmstieg);
DefineRoute defineRoute = defineroute[position];
txZeit.setText(defineRoute.getAbfahrtszeit() + " - " + defineRoute.getAnkunftszeit());
txDauer.setText(defineRoute.getDauer());
txUmstieg.setText(defineRoute.getUmstieg());
return row;
}
}
How should i continue?
and what should my adapter look like?

Your ArrayAdapter<String> is type of String so pass String list to it's constructor instead of verbindungen.getVerbindungen() list of objects.

ArrarAdapter < T > is any type of class you can use
in your case ArrayAdapter so you need override toString method of DefineRoute class
in your case
#Override
public String toString() {
return ankunftszeit+" "+ankunftszeit;
//or what ever you want to displat
}
or there is other Solution is Create your Own adapter extending by BaseAdapter Class.