I am newbie in Android, so I can not estimate how do I save data in database(SQLite) that were got from httprequest through Json.
Here is my code:
final ArrayList<HashMap<String, String>> mylist4 = new ArrayList<HashMap<String, String>>();
try{
JSONObject jObj = new JSONObject(rfiItems);
JSONArray data4 = jObj.getJSONArray("data");
//data4 = json4.getJSONArray("data");
//Toast.makeText(getApplicationContext(), data4.toString(), Toast.LENGTH_LONG).show();
for(int i=0;i<data4.length();i++){
HashMap<String, String> map = new HashMap<String, String>();
JSONObject e = data4.getJSONObject(i);
map.put("id", String.valueOf(i));
map.put("rfi_data1", "" + e.getString("item_type"));
map.put("rfi_data2", "" + e.getString("change_number"));
map.put("rfi_data3", "" + e.getString("to_vendor"));
map.put("rfi_data4", "" + e.getString("status"));
map.put("rfi_data5", "" + e.getString("title"));
map.put("rfi_data6", "" + e.getString("change_date"));
map.put("rfi_data7", "" + e.getString("responded_date"));
mylist4.add(map);
}
}catch(JSONException e) {
Log.e("log_tag", "Error parsing data "+e.toString());
}
ListAdapter adapter4 = new SimpleAdapter(this, mylist4 , R.layout.item_list4,
new String[] { "rfi_data1", "rfi_data2","rfi_data3", "rfi_data4","rfi_data5","rfi_data6","rfi_data7"},
new int[] { R.id.rfi_item_type, R.id.rfi_change_no,R.id.rfi_to_vendor,R.id.rfi_status,R.id.rfi_title,R.id.rfi_change_date,R.id.rfi_responded_date });
setListAdapter(adapter4);
Any help will really be appreciated. THANKS
DataBean.java class create for getter and setter method
public class DataBean {
private String item_type = null;
private String change_number = null;
public String getItem_type() {
return item_type;
}
public void setItem_type(String itemType) {
item_type = itemType;
}
public String getChange_number() {
return change_number;
}
public void setChange_number(String changeNumber) {
change_number = changeNumber;
}
}
in your Activity class..set value in object and insert into database
private DatabaseHelper mDbHelper;
DataBean dataBean;
private Cursor mNotesCursor;
private NewsCursorAdapter adapter = null;
mDbHelper = new DatabaseHelper(this);
ArrayList<DataBean> liststck = new ArrayList<DataBean>();
for(int i=0;i<data4.length();i++){
JSONObject e = data4.getJSONObject(i);
dataBean = new DataBean();
dataBean.setChange_number(e.getString("eqid"));
dataBean.setItem_type(e.getString("magnitude"));
liststck.add(dataBean);
}
mDbHelper.deleteRecords();
for (DataBean dataBean : liststck) {
mDbHelper.insertdata(dataBean);
}
mNotesCursor = mDbHelper.retrievedata();
startManagingCursor(mNotesCursor);
adapter.changeCursor(mNotesCursor);
adapter.notifyDataSetChanged();
you must create NCursorAdapter class for dispay result(like custom listview).
here data.xml file is your custom layout. which content two textview.... "key_no" and "key_item" your database table column name...
public class NCursorAdapter extends CursorAdapter {
private Cursor mCursor;
private Context mContext;
private final LayoutInflater mInflater;
public NCursorAdapter(Context context, Cursor c) {
super(context, c);
// TODO Auto-generated constructor stub
mInflater = LayoutInflater.from(context);
mContext = context;
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
// TODO Auto-generated method stub
TextView title = (TextView) view.findViewById(R.id.title);
title.setText(cursor.getString(cursor.getColumnIndex("key_no")));
TextView date = (TextView) view.findViewById(R.id.date);
date.setText(cursor.getString(cursor.getColumnIndex("key_item")));
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// TODO Auto-generated method stub
final View view = mInflater.inflate(R.layout.data, parent, false);
return view;
}
}
in your database class insert data and retrieve data
public Long insertdata(DataBean dataBean) {
ContentValues contentValues = new ContentValues();
contentValues.put(KEY_NO, dataBean.getChange_number());
contentValues.put(KEY_ITEM, dataBean.getItem_type());
return sqliteDatabase.insert(DATABASE_TABLE, null, contentValues);
}
public Cursor retrievedata() {
return sqliteDatabase.query(DATABASE_TABLE, new String[] { KEY_ROWID,KEY_NO, KEY_ITEM }, null,null);
}
I hope it is useful for your application.
Related
This is my query in my DatabaseHelper
public List<String> getallstatus(){
List<String> list = new ArrayList<>();
String query = "select * from ref_status";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(query,null);
try{
if(cursor.moveToFirst()){
do{
list.add(cursor.getString(0));
list.add(cursor.getString(1));
}while(cursor.moveToNext());
}
cursor.close();
db.close();
}catch(Exception e){
Log.e("onins" , e.getMessage(),e);
}
return list;
}
This is my dataProvider class
public class DataProvider {
private String regcode, regname;
public DataProvider(String regcode, String regname){
this.regcode =regcode;
this.regname = regname;
}
public String getRegcode(){ return regcode; }
public void setRegCode(){ this.regcode = regcode; }
public String getRegname(){ return regname; }
public void setRegname() { this.regname = regname; }
#Override
public String toString(){
return regname;
}
#Override
public boolean equals(Object obj) {
if(obj instanceof DataProvider){
DataProvider c = (DataProvider ) obj;
if(c.getRegname().equals(regname) && c.getRegcode()==regcode )
return true;
}
return false;
}
}
and this is my onCreate in my main activity
db = new DatabaseHelper(getApplicationContext());
List<String> result = db.getallstatus();
//spinner elements
ArrayList<DataProvider> datalist = new ArrayList<>();
ArrayAdapter<DataProvider> adapter = new ArrayAdapter<DataProvider>(this,android.R.layout.simple_spinner_dropdown_item,datalist);
// Drop down layout style - list view with radio button
// adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//attaching adapter to spinner
valueofspin.setAdapter(adapter);
// valueofspin.setSelection(adapter.getPosition(myItem));
I just wanna pass the result of this List result to my array adapter. I'm new in android studio hope somebody can help me. Thanks in advance.
Do this Create a constructor in your Arrayadapter
public class ArrayAdapter extends....{
ArrayList<DataProvider> dataList;
List<String> list;
ArrayAdapter(Context context,resources id,ArrayList<DataProvider>
dataList,List<String> list){
this.context=context;
this.dataList = datalist;
this.list = list
}
}
On your Activity...Do this
ArrayAdapter<DataProvider> adapter = new ArrayAdapter<DataProvider>(this,android.R.layout.simple_spinner_dropdown_item,datalist,result);
Pass result through constructor..
I am new to android development and must take the value of the id in the clicked item database.
Already searched several posts but not found the answer .
Below is my code Listview :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.seleciona_jogador_act);
final BancoController bc = new BancoController(this);
final ArrayList<JogadorEntidade> jogadorEntidade = bc.arrayJogador(this);
listView = (ListView) findViewById(R.id.lvSelecionar);
final SelecionaAdapter adapter = new SelecionaAdapter(this, R.layout.adapter_seleciona, jogadorEntidade);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setBackgroundTintList(ColorStateList.valueOf(background));
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertInserirJogador(SelecionaJogadorAct.this);
}
});
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//I NEED THIS CODE
Context context = getApplicationContext();
CharSequence text = "ID: " + ", Posicao: " + position;
int duration = Toast.LENGTH_SHORT;
Toast.makeText(context, text, duration).show();
//bc.deletaRegistro(id_player);
Intent intent = getIntent();
SelecionaJogadorAct.this.finish();
startActivity(intent);
}
});
}
My Adapter:
public class SelecionaAdapter extends ArrayAdapter<JogadorEntidade> {
Context context;
int layoutID;
ArrayList<JogadorEntidade> alJogador;
public SelecionaAdapter(Context context, int layoutID, ArrayList<JogadorEntidade> alJogador){
super(context, layoutID, alJogador);
this.context = context;
this.alJogador = alJogador;
this.layoutID = layoutID;
}
#Override
public View getView(int position, View convertView, ViewGroup parent){
View row = convertView;
PlayerHolder holder = null;
if (row == null){
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutID, parent, false);
holder = new PlayerHolder();
holder.txtNome = (TextView)row.findViewById(R.id.txtNomeSelecionar);
holder.txtVitorias = (TextView)row.findViewById(R.id.txtVitóriasSelecionar);
holder.txtDerrotas = (TextView)row.findViewById(R.id.txtDerrotasSelecionar);
row.setTag(holder);
}else {
holder = (PlayerHolder)row.getTag();
}
JogadorEntidade jogadorEntidade = alJogador.get(position);
holder.txtNome.setText(jogadorEntidade.getNome());
holder.txtVitorias.setText("V: " + jogadorEntidade.vitórias);
holder.txtDerrotas.setText("D: " + jogadorEntidade.derrotas);
return row;
}
static class PlayerHolder{
TextView txtNome;
TextView txtVitorias;
TextView txtDerrotas;
}
JogadorEntidade:
public class JogadorEntidade {
public String nome;
public Integer id_jogador;
public String vitórias;
public String derrotas;
public Integer getId_jogador() {
return id_jogador;
}
public void setId_player(int id_player) {
this.id_jogador = id_player;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public String getVitórias() {
return vitórias;
}
public void setVitórias(String vitórias) {
this.vitórias = vitórias;
}
public String getDerrotas() {
return derrotas;
}
public void setDerrotas(String derrotas) {
this.derrotas = derrotas;
}
public JogadorEntidade(String nome, String vitórias, String derrotas){
super();
this.nome = nome;
this.vitórias = vitórias;
this.derrotas = derrotas;
}
public JogadorEntidade(){}
public void insereJogador(JogadorEntidade jogadorEntidade) {
db = banco.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(banco.NOME_JOGADOR, jogadorEntidade.getNome());
values.put(banco.VITORIAS, jogadorEntidade.getVitórias());
values.put(banco.DERROTAS, jogadorEntidade.getDerrotas());
db.insert(CriaBanco.TABELA_JOGADOR, null, values);
db.close();
}
public Cursor carregaJogador() {
Cursor cursor;
String[] campos = {banco.NOME_JOGADOR, banco.VITORIAS, banco.DERROTAS};
db = banco.getReadableDatabase();
cursor = db.query(banco.TABELA_JOGADOR, campos, null, null, null, null, null, null);
if (cursor != null) {
cursor.moveToFirst();
}
db.close();
return cursor;
}
public void deletaRegistro(int id){
String where = CriaBanco.ID_JOGADOR + "=" + id;
db = banco.getReadableDatabase();
db.delete(CriaBanco.TABELA_JOGADOR, where, null);
db.close();
}
public ArrayList<JogadorEntidade> arrayJogador(Context context) {
ArrayList<JogadorEntidade> al = new ArrayList<JogadorEntidade>();
BancoController bancoController = new BancoController(context);
Cursor cursor;
cursor = bancoController.carregaJogador();
if (cursor != null) {
if (cursor.moveToFirst()) {
String nome = cursor.getString(cursor.getColumnIndex(banco.NOME_JOGADOR));
String vitorias = cursor.getString(cursor.getColumnIndex(banco.VITORIAS));
String derrotas = cursor.getString(cursor.getColumnIndex(banco.DERROTAS));
JogadorEntidade jogadorEntidade = new JogadorEntidade(nome, vitorias, derrotas);
al.add(jogadorEntidade);
while (cursor.moveToNext()) {
nome = cursor.getString(cursor.getColumnIndex(banco.NOME_JOGADOR));
vitorias = cursor.getString(cursor.getColumnIndex(banco.VITORIAS));
derrotas = cursor.getString(cursor.getColumnIndex(banco.DERROTAS));
jogadorEntidade = new JogadorEntidade(nome, vitorias, derrotas);
al.add(jogadorEntidade);
}
}
}
return al;
}
First you need to request the id when making the query (if the id is the one created in the database the column mame is _id or you can use tablename._id or whatever you need):
String[] campos = {"_id", banco.NOME_JOGADOR, banco.VITORIAS, banco.DERROTAS};
Then you need to add the id to the object when you read the cursor:
public ArrayList<JogadorEntidade> arrayJogador(Context context) {
ArrayList<JogadorEntidade> al = new ArrayList<JogadorEntidade>();
BancoController bancoController = new BancoController(context);
Cursor cursor;
cursor = bancoController.carregaJogador();
if (cursor != null) {
if (cursor.moveToFirst()) {
String nome = cursor.getString(cursor.getColumnIndex(banco.NOME_JOGADOR));
String vitorias = cursor.getString(cursor.getColumnIndex(banco.VITORIAS));
String derrotas = cursor.getString(cursor.getColumnIndex(banco.DERROTAS));
long id = cursor.getLong(cursor.getColumnIndex("_id",0));
JogadorEntidade jogadorEntidade = new JogadorEntidade(id, nome, vitorias, derrotas);
al.add(jogadorEntidade);
while (cursor.moveToNext()) {
nome = cursor.getString(cursor.getColumnIndex(banco.NOME_JOGADOR));
vitorias = cursor.getString(cursor.getColumnIndex(banco.VITORIAS));
derrotas = cursor.getString(cursor.getColumnIndex(banco.DERROTAS));
long id = cursor.getLong(cursor.getColumnIndex("_id",0));
jogadorEntidade = new JogadorEntidade(id, nome, vitorias, derrotas);
al.add(jogadorEntidade);
}
}
}
return al;
}
Anyway this is not the way to go in android. You should read all the list and then show it. You should use the viewholder pattern and only load the player when you are going to show it. Also instead of using a list you should move to recyclerviews. Listviews can be consider deprecated at this point. See the tutorial: http://developer.android.com/training/material/lists-cards.html
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.
I have code to get phone contact from server in android , I use menu item to make it , this is my code
Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");
int row = cursor.getCount();
friend_item = new MenuItem [row];
//int i=0;
while(cursor.moveToNext()){
nama = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
phone = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
// friend_item[i] = new MenuItem(nama,phone);
//i++;
}
cursor.moveToFirst();
while(!cursor.isAfterLast()){
Log.d("", "" + cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)));
phone = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
phoneList.add(phone);
cursor.moveToNext();
}
cursor.close();
String [] phonearray = (String[]) phoneList.toArray(new String[phoneList.size()]);
// friendarray();
String friends=phonearray[0]+"";
for(int a=1; a<phonearray.length; a++){
friends = friends + ","+ phonearray[a];
}
Log.d("" , "" + friends);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("phone", mPhoneNumber));
params.add(new BasicNameValuePair("friend", friends));
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(Constants.url_phone_contact, "POST", params);
// Check your log cat for JSON reponse
Log.d("All Friend: ", json.toString());
try {
friend = json.getJSONArray("friend");
friend_item = new MenuItem[friend.length()];
// looping through All Products
for (int a = 0; a < friend.length(); a++) {
JSONObject c = friend.getJSONObject(a);
//Storing each json item in variable
phone_friend= c.getString("phone");
id_friend = c.getString("id_ref");
Log.e("id_user", id_friend);
namaFriend = getName(phone_friend);
if(phone_friend == null){
Toast.makeText(getApplicationContext(), "contact not found", Toast.LENGTH_LONG).show();
}else{
friend_item[a] = new MenuItem(namaFriend, phone_friend);
// creating new HashMap
HashMap<String, String> map1 = new HashMap<String, String>();
// adding each child node to HashMap key => value
//map1.put("phone", mPhoneNumber);
map1.put("id_ref", id_friend);
map1.put("nama_friend", namaFriend);
// adding HashList to ArrayList
friendList.add(map1);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
//i++;*/
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
pDialog.dismiss();
if(friend_item != null && friend_item.length > 0){
mainlist.setAdapter(new ListMenuAdapter(friend_item));
} else
Toast.makeText(getApplicationContext(), "You don't have friend using Shoop! yet, please invite them :)", Toast.LENGTH_LONG).show();
}
}
to get name from android device , I use this code
private String getName(String number) {
// define the columns I want the query to return
String[] projection = new String[] {
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER};
// encode the phone number and build the filter URI
Uri contactUri = Uri.withAppendedPath(ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI, Uri.encode(number));
// query time
Cursor c = getContentResolver().query(contactUri, projection, null,
null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME +" ASC");
// if the query returns 1 or more results
// return the first result
if (c.moveToFirst()) {
String name = c.getString(c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
return name;
}
// return the original number if no match was found
return number;
}
this List menu adapter
private class ListMenuAdapter extends BaseAdapter{
private MenuItem [] item;
protected ListMenuAdapter(MenuItem... item){
this.item = item;
}
public int getCount() {
return item.length;
}
public Object getItem(int pos) {
return item[pos];
}
public long getItemId(int position) {
return position;
}
public ViewGroup getViewGroup(int position, View view, ViewGroup parent){
if(view instanceof ViewGroup){
return (ViewGroup) view;
}
Context context = parent.getContext();
LayoutInflater inflater = LayoutInflater.from(context);
ViewGroup viewgroup = (ViewGroup)inflater.inflate(R.layout.custom_content_friend, null);
return viewgroup;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewGroup group = getViewGroup(position, convertView, parent);
MenuItem menu = item[position];
TextView name = (TextView) group.findViewById(R.id.content_friend_myname);
TextView phone = (TextView) group.findViewById(R.id.content_friend_desc);
if(menu.my_name == null || menu.phone == null){
Toast.makeText(getApplicationContext(), "Contact not found", Toast.LENGTH_LONG).show();
}else{
name.setText(menu.my_name);
phone.setText(menu.phone);
}
return group;
}
}
private class MenuItem{
private String my_name, phone;
protected MenuItem(String my_name, String phone){
this.my_name = my_name;
this.phone= phone;
}
}
and now , I want to get List view that contain name and phone with sorting ascending by name , How to do that?? thanks for ur advice
- First use an ArrayList instead of Array to store the data which will further being used by the Adapter.
- Use java.util.Comparator<T> to sort the name and phone (ie. contacts) according to the name.
- Use Collections.sort(List<?> l , Comparator c) to invoke the sorting.
- And also call notifyDataSetChanged() on the Adapter after setting the ListView with the adapter.
Eg:
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
class Car {
private String name;
private String brand;
private double cost;
public Car(String name, String brand, double cost) {
this.name = name;
this.brand = brand;
this.cost = cost;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public double getCost() {
return cost;
}
public void setCost(double cost) {
this.cost = cost;
}
public String toString() {
return getName();
}
}
public class Hog {
ArrayList<Car> cars = new ArrayList<Car>();
public void setIt() {
cars.add(new Car("Padmini", "Fiat", 100008.00));
cars.add(new Car("XYlo", "Mahindra", 100000.00));
cars.add(new Car("Swift", "Maruti", 200000.00));
}
public void sortIt() {
Collections.sort(cars, new NameComparator());
System.out.println(cars);
Collections.sort(cars, new BrandComparator());
System.out.println(cars);
Collections.sort(cars, new CostComparator());
System.out.println(cars);
}
class NameComparator implements Comparator<Car> {
public int compare(Car c1, Car c2) {
return c1.getName().compareTo(c2.getName());
}
}
class BrandComparator implements Comparator<Car> {
public int compare(Car c1, Car c2) {
return c1.getBrand().compareTo(c2.getBrand());
}
}
class CostComparator implements Comparator<Car> {
public int compare(Car c1, Car c2) {
return new Double(c1.getCost()).compareTo(new Double(c2.getCost()));
}
}
public static void main(String[] args) {
Hog h = new Hog();
h.setIt();
h.sortIt();
}
}
In your activity class write this:
public class MyActivity extends Activity {
....
private ListView listView01;
private ArrayList<MenuItem> list;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// ...
listView01 = (ListView)findViewById(R.id.listView1);
list=new ArrayList<MyActivity.MenuItem>();
// code to fill your ArrayList
Collections.sort(list, myComparator);
listView01.setAdapter(new ListMenuAdapter());
}
Comparator<MenuItem> myComparator = new Comparator<MenuItem>()
{
public int compare(MenuItem arg0,MenuItem arg1)
{
return arg0.my_name.compareTo(arg1.my_name);
}
};
}
I am retrieving data from sqlite to base adapter by cursor.
main.java
SQLiteDatabase db = dbHelper.getReadableDatabase();
Cursor c=db.rawQuery("select * from budget",null);
while (c.moveToNext()) {
String tes0 = Integer.toString(c.getInt(c.getColumnIndex("_id")));
String tes1 = Double.toString(c.getDouble(c.getColumnIndex("material_actual")));
tes2 = c.getString(c.getColumnIndex("start_date"));
tes3 = c.getString(c.getColumnIndex("end_date"));
String[] v0 = new String[] { tes0 };
String[] v01 = new String[] { tes1 };
String[] v02 = new String[] { tes2 };
String[] v03 = new String[] { tes3 };
Adapter_ListView adapter = new Adapter_ListView(getBaseContext(),
v01, v02 , v03, theTotal); //string[]
TaskList.setAdapter(adapter);
}
Then, Adapter_listView.java
public class Adapter_ListView extends BaseAdapter {
private int count;
private Context context;
private String[] string1;
private String[] string2;
private String[] string3;
private String con1;
private String con2;
private String con3;
public Adapter_ListView(Context baseContext, String[] v01, String[] v02, String[] v03, int theTotal) {
this.count = theTotal;
this.context = baseContext;
this.string1 = v01;
this.string2 = v02;
this.string3 = v03;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return count;
}
#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 position, View contentView, ViewGroup arg2) {
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
contentView = inflater.inflate(R.layout.layout_inflate_list2, null);
TextView title = (TextView)contentView.findViewById(R.id.inflate_title);
TextView body = (TextView)contentView.findViewById(R.id.inflate_body);
TextView sub = (TextView)contentView.findViewById(R.id.inflate_sub);
title.setText(string1[position]);
body.setText(string2[position]);
sub.setText(string3[position]);
return contentView;
}
}
from this code always error --> ArrayOuOfBound if execute this code
title.setText(string1[position]);
how i can solve it?
You need to open your database in the activity you retrieve or insert data into your SQLite database. Also make sure you close it when your finished.
final DatabaseHelper m = new DatabaseHelper(this);
m.open();
In your onDestroy or pause. Call
m.close();
This may be the issue, because i dont see where you open your database in the code.
EDIT :
In your DatabaseHelper class. Create a method.
public void open(){
db.open();
}
public void close(){
db.close()
}
Then you will have the method to close and open the database in your activities where you need to insert and retrieve information.
To retrive data from cursor, first you must go to first row data in cursor.
Some code like this:
SQLiteDatabase db = dbHelper.getReadableDatabase();
Cursor c=db.rawQuery("select * from budget",null);
if (c!=null) c.moveToFirst();
while (c.moveToNext()) {
...
}
good luck!! :D
It seems you want to load resultset into list, if so please change your code to set adapter outside of loop:
SQLiteDatabase db = dbHelper.getReadableDatabase();
Cursor c=db.rawQuery("select * from budget",null);
int theTotal=c.getCount();
String[] v0 = new String[theTotal];
String[] v01 = new String[theTotal];
String[] v02 = new String[theTotal];
String[] v03 = new String[theTotal];
int i=0;
if (c!=null) c.moveToFirst();
while (c.moveToNext()) {
String tes0 = Integer.toString(c.getInt(c.getColumnIndex("_id")));
String tes1 = Double.toString(c.getDouble(c.getColumnIndex("material_actual")));
tes2 = c.getString(c.getColumnIndex("start_date"));
tes3 = c.getString(c.getColumnIndex("end_date"));
v0[i] =tes0 ;
v01[i] = tes1 ;
v02[i] = tes2 ;
v03[i] = tes3 ;
}
Adapter_ListView adapter = new Adapter_ListView(getBaseContext(),
v01, v02 , v03, theTotal); //string[]
TaskList.setAdapter(adapter);
Try this:
main.java
SQLiteDatabase db = dbHelper.getReadableDatabase();
Cursor c=db.rawQuery("select * from budget",null);
if(c.getCount()>0)
{
int i=0;
int clength=c.getCount();
String[] v0=new String[clength];
String[] v1=new String[clength];
String[] v2=new String[clength];
String[] v3=new String[clength];
while (c.moveToNext())
{
String tes0 = Integer.toString(c.getInt(c.getColumnIndex("_id")));
String tes1 = Double.toString(c.getDouble(c.getColumnIndex("material_actual")));
tes2 = c.getString(c.getColumnIndex("start_date"));
tes3 = c.getString(c.getColumnIndex("end_date"));
v0[i]=tes0;
v01[i]=tes1;
v01[i]=tes2;
v01[i]=tes3;
i++;
}
Adapter_ListView adapter = new Adapter_ListView(getBaseContext(),v01, v02 , v03, theTotal); //string[]
TaskList.setAdapter(adapter);
}