Develop Reference

Cannot refer to a non-final variable myVariable inside an inner class defined in a different method

maybe i can't explain exactly my problem but with the code below i hope that helps you to answering my question. am trying to pass a String data between two Activities using Intent, in the same time, inside my StringRequest, i use jSonObject to recuperate data from server using volley, so i'd like to know how to put the sames variables recuperated from server to second activity using putExtra, because i have problem of modifier, if a remove modifier for my variables i have an error in the putExtra it should be final modifier and if i put it i have an error with my jsonobject, So, what's the solution please ? thank's in advance.
String idMed;
final String numTelMed;
final String communeMed;
final String nomMed;
final String emailMed;
final String codePostalMed;
final String prenomMed;
final String rueMed;
final String villeMed;
final String specialiteMed;
final String latitude;
final String longitude;
ListView listeView;
listeView = (ListView) findViewById(R.id.sampleListView);
List<String> listeMed = new ArrayList<String>();
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(Main_Activity.this,android.R.layout.simple_list_item_1, listeMed);
listeView.setAdapter(adapter1);
JSONArray jObjectSearch = new JSONArray(response);
Log.i("OK","JSONObjectOK : "+jObjectSearch);
Log.i("OK","JSONObjectOK : "+jObjectSearch.getString(0));
for(int i=0; i<jObjectSearch.length();i++)
{
JSONObject j = new JSONObject(jObjectSearch.getString(0));
idMed = j.getString("id");
nomMed = j.getString("nomMed");
prenomMed = j.getString("prenomMed");
numTelMed = j.getString("numTelMed");
emailMed = j.getString("emailMed");
rueMed = j.getString("rueMed");
communeMed = j.getString("communeMed");
codePostalMed = j.getString("codePostalMed");
villeMed = j.getString("villeMed");
specialiteMed = j.getString("specialiteMed");
latitude = j.getString("latitude");
longitude = j.getString("longitude");
listeMed.add("Nom : "+nomMed+"\n "+"Prénom : "+prenomMed+"\n "+"Numéro Téléphone : "+numTelMed+"\n "
+"Email : "+emailMed+"\n "+"Adresse : "+rueMed+" "+codePostalMed+" "
+villeMed+" "+communeMed+"\n "+"Spécialité : "+specialiteMed);
listeView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
medecinSearched = new Intent(Main_Activity.this, MedecinSearched.class);
medecinSearched.putExtra("nomMed", nomMed);
medecinSearched.putExtra("prenomMed", prenomMed);
medecinSearched.putExtra("numTelMed", numTelMed);
medecinSearched.putExtra("emailMed", emailMed);
medecinSearched.putExtra("rueMed", rueMed);
medecinSearched.putExtra("communeMed", communeMed);
medecinSearched.putExtra("codePostalMed", codePostalMed);
medecinSearched.putExtra("villeMed", villeMed);
medecinSearched.putExtra("specialiteMed", specialiteMed);
medecinSearched.putExtra("latitude", latitude);
medecinSearched.putExtra("longitude", longitude);
startActivity(medecinSearched);
finish();
}
});
}

If you want to use a variable inside an anonymous class you have to use the final keyword.
However, in this case I would solve this with another approach:
Create a Med class with all the properties you need id, nom, prenom, etc.
Create a MedAdapter extending BaseAdapter instead of using an ArrayAdapter<String>.
onCreate method:
listeView = (ListView) findViewById(R.id.sampleListView);
listeMed = new ArrayList<Med>();
MedAdapter adapter1 = new MedAdapter<String>(Main_Activity.this, listeMed);
listeView.setAdapter(adapter1);
listeView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Med med = listeMed.get(position);
Intent medecinSearched = new Intent(Main_Activity.this, MedecinSearched.class);
medecinSearched.putExtra("EXTRA_MED", med); // Med must implement Serializable or Parcelable
startActivity(medecinSearched);
finish();
}
});
Response callback:
JSONArray jObjectSearch = new JSONArray(response);
for(int i=0; i<jObjectSearch.length(); i++) {
JSONObject jsonObject = new JSONObject(jObjectSearch.getString(0));
Med med = new Med(jsonObject); // Med must have a constructor which receives the JSONObject.
listeMed.add(med);
}
adapter1.notifyDataSetChanged();
Hope it helps.

thank's for All, it helps me so much
I have solution but i don't know if it has an inconvenient, here is my solution :
`
String idMed; String numTelMed; String communeMed;
String nomMed; String emailMed; String codePostalMed;
String prenomMed; String rueMed; String villeMed;
String specialiteMed; String latitude; String longitude;
ListView listeView;
listeView = (ListView) findViewById(R.id.sampleListView);
List<String> listeMed = new ArrayList<String>();
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(Main_Activity.this,android.R.layout.simple_list_item_1, listeMed);
listeView.setAdapter(adapter1);
JSONArray jObjectSearch = new JSONArray(response);
Log.i("OK","JSONObjectOK : "+jObjectSearch);
Log.i("OK","JSONObjectOK : "+jObjectSearch.getString(0));
for(int i=0; i<jObjectSearch.length();i++)
{
JSONObject j = new JSONObject(jObjectSearch.getString(0));
final String idMedF = idMed = j.getString("id");
final String nomMedF = nomMed = j.getString("nomMed");
final String prenomMedF =prenomMed = j.getString("prenomMed");
final String numTelMedF =numTelMed = j.getString("numTelMed");
final String emailMedF =emailMed = j.getString("emailMed");
final String rueMedF= rueMed = j.getString("rueMed");
final String communeMedF =communeMed = j.getString("communeMed");
final String codePostalMedF = codePostalMed = j.getString("codePostalMed");
final String villeMedF =villeMed = j.getString("villeMed");
final String specialiteMedF =specialiteMed = j.getString("specialiteMed");
final double latitudeF = j.getDouble("latitude");
final double longitudeF = j.getDouble("longitude");
listeMed.add("Nom : "+nomMed+"\n "+"Prénom : "+prenomMed+"\n "+"Numéro Téléphone : "+numTelMed+"\n "
+"Email : "+emailMed+"\n "+"Adresse : "+rueMed+" "+codePostalMed+" "
+villeMed+" "+communeMed+"\n "+"Spécialité : "+specialiteMed);
listeView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
putData(idMedF, nomMedF, prenomMedF, numTelMedF, emailMedF, rueMedF, communeMedF, codePostalMedF, villeMedF, specialiteMedF, latitudeF, longitudeF);
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}`

how do i apply a condition when the fields are empty then it never post the data to the mysql data base

I am trying to post data to mysql data base and it post it. But now i am trying to apply check if the fields in activity are empty - and data isn't posted to database.
public class Accepter extends Activity implements OnClickListener{
private EditText etName,etAge,etCity,etContact,etQuantity;
private Spinner spBloodGroup;
private ImageView imCancel,imSave;
private String message = "POST";
private static String[] BLOOD_GROUPS = {"Select Blood Group","A +Ve","B +Ve","AB +Ve","O +Ve","A -Ve","B -Ve","AB -Ve","O -Ve"};
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.accepter_entry_form);
etName = (EditText)findViewById(R.id.etNameAcc);
etAge = (EditText)findViewById(R.id.etAgeAcc);
etCity = (EditText)findViewById(R.id.etCityAcc);
etContact = (EditText)findViewById(R.id.etPhoneNoAcc);
etQuantity = (EditText)findViewById(R.id.etQuantityAcc);
spBloodGroup = (Spinner)findViewById(R.id.spBloodGroupAcc);
imCancel = (ImageView)findViewById(R.id.imCancelAcc);
imSave = (ImageView)findViewById(R.id.imSaveAcc);
imCancel.setOnClickListener(this);
imSave.setOnClickListener(this);
ArrayAdapter<String> bgAdapter = new ArrayAdapter<String>(Accepter.this,android.R.layout.simple_spinner_item,BLOOD_GROUPS);
bgAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spBloodGroup.setAdapter(bgAdapter);
}
#Override
public void onClick(View v) {
switch(v.getId())
{
case R.id.imSaveAcc:
String name = etName.getText().toString();
String blood = spBloodGroup.getSelectedItem().toString();
String quantity = etQuantity.getText().toString();
String phone = etContact.getText().toString();
int age = Integer.parseInt(etAge.getText().toString());
String city = etCity.getText().toString();
Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month= c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
String date = String.valueOf(day) + "-" + String.valueOf(month) + "-" + String.valueOf(year);
if(name.length()>1 && blood.length()>1 && phone.length()>1 && age>15 && city.length()>1)
{
AccepterTask task = new AccepterTask(v.getContext());
task.execute(message ,name, blood, phone, String.valueOf(age),city,quantity,date);
etName.setText("");
spBloodGroup.setSelection(0);
etContact.setText("");
etAge.setText("");
etCity.setText("");
etQuantity.setText("");
finish();
}
else
{
Toast.makeText(Accepter.this, "Any field is empty or invalid", Toast.LENGTH_LONG).show();
}
break;
case R.id.imCancelAcc:
Intent i = new Intent(v.getContext(),MainView.class);
i.putExtra("type", "Accepter");
startActivity(i);
break;
}
}
public class AccepterTask extends AsyncTask<String, Void, String>{
private Context context;
private JSONParser jsonParser = new JSONParser();
private JSONObject json;
private String accepter_url = //"http://192.168.0.6/accepter.php";
"http://10.0.2.2/accepter.php";
private String s;
public AccepterTask(Context c)
{
context = c;
}
#Override
protected String doInBackground(String... params)
{
String message = params[0];
if(message.equals("POST"))
{
List<NameValuePair> list = new ArrayList<NameValuePair>();
final String names = params[1];
final String blood = params[2];
final String phone = params[3];
final String age = params[4];
final String city = params[5];
final String quantity = params[6];
final String date = params[7];
list.add(new BasicNameValuePair("name", names));
list.add(new BasicNameValuePair("blood", blood));
list.add(new BasicNameValuePair("quantity", quantity));
list.add(new BasicNameValuePair("phone", phone));
list.add(new BasicNameValuePair("age", age));
list.add(new BasicNameValuePair("city", city));
list.add(new BasicNameValuePair("date", date));
json = jsonParser.makeHttpRequest(accepter_url, params[0], list);
}
try
{
s = json.getString("message");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return s;
}
#Override
protected void onPostExecute(String result)
{
Toast.makeText(context, result, Toast.LENGTH_LONG).show();
}
}
}
here for updates

Listview Pagination in android

I have a listview where I have 50 elements being displayed. I have decided to paginate the view so on each part of the view there are 10 elements and then a next button is clicked to get to the next 10 elements. How can i set 10 data ? I follow this article
http://rakhi577.wordpress.com/2013/05/20/listview-pagination-ex-2/
Here is my code .Can you help me with my code or a link to a guide on how to implement this correctly?
public class MainActivity extends ListActivity {
Context context;
Button btnSearch ;
EditText txtSearch;
private ProgressDialog pDialog;
// URL to get contacts JSON
public int TOTAL_LIST_ITEMS = 50;
public int NUM_ITEMS_PAGE = 10;
private int noOfBtns;
private Button[] btns;
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSearch=(Button)findViewById(R.id.buttonSearch);
txtSearch=(EditText)findViewById(R.id.Searchtext);
}
public String gotourl()
{
final EditText txtSearch=(EditText)findViewById(R.id.Searchtext);
String ts=txtSearch.getText().toString();
String url = "http://latest.bloomapi.com/api/search?limit=50&offset=0&key1=last_name&op1=eq&value1="+ts;
return url ;
}
public void Searchfunction(View v)
{
Btnfooter();
//loadList(0);
CheckBtnBackGroud(0);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_EMAIL, cost);
in.putExtra(TAG_PHONE_MOBILE, description);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
private void Btnfooter()
{
int val = TOTAL_LIST_ITEMS%NUM_ITEMS_PAGE;
val = val==0?0:1;
noOfBtns=TOTAL_LIST_ITEMS/NUM_ITEMS_PAGE+val;
LinearLayout ll = (LinearLayout)findViewById(R.id.btnLay);
btns =new Button[noOfBtns];
for(int i=0;i<noOfBtns;i++)
{
btns[i] = new Button(this);
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setText(""+(i+1));
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.addView(btns[i], lp);
final int j = i;
btns[j].setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
//loadList(j);
CheckBtnBackGroud(j);
}
});
}
}
private void CheckBtnBackGroud(int index)
{
for(int i=0;i<noOfBtns;i++)
{
if(i==index)
{
btns[index].setBackgroundDrawable(getResources().getDrawable(R.drawable.box_green));
btns[i].setTextColor(getResources().getColor(android.R.color.white));
}
else
{
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setTextColor(getResources().getColor(android.R.color.black));
}
}
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(gotourl(), ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
contacts = jsonObj.getJSONArray("result");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
Integer a = contacts.length();
Log.d("loop", a.toString());
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("npi");
String name = c.getString("first_name");
String email = c.getString("last_name");
//String address = c.getString(TAG_ADDRESS);
String gender = c.getString("type");
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put("npi", id);
contact.put("first_name", name);
contact.put("last_name", email);
//contact.put(TAG_PHONE_MOBILE, mobile);
contact.put("type", gender);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.d("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { "first_name", "last_name",
"type" }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}}
I change the code. When i click next button[like 2,3,4,5]. showing first page data. Here is my modified code.Any help Appreciated :
public class MainActivity extends ListActivity {
private TextView title;
Context context;
Button btnSearch ;
EditText txtSearch;
private ListView listview;
private ProgressDialog pDialog;
// URL to get contacts JSON
public int TOTAL_LIST_ITEMS = 50;
public int NUM_ITEMS_PAGE = 10;
private int noOfBtns;
private Button[] btns;
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSearch=(Button)findViewById(R.id.buttonSearch);
txtSearch=(EditText)findViewById(R.id.Searchtext);
title = (TextView)findViewById(R.id.title);
}
public String gotourl()
{
final EditText txtSearch=(EditText)findViewById(R.id.Searchtext);
String ts=txtSearch.getText().toString();
String url = "http://latest.bloomapi.com/api/search?limit=50&offset=0&key1=last_name&op1=eq&value1="+ts;
return url ;
}
public void Searchfunction(View v)
{
Btnfooter();
CheckBtnBackGroud(0);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
if(position%2==0)
{
view.setBackgroundColor(Color.parseColor("#F4FA58"));
}else
{
view.setBackgroundColor(Color.parseColor("#DA81F5"));
}
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_EMAIL, cost);
in.putExtra(TAG_PHONE_MOBILE, description);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
private void Btnfooter()
{
int val = TOTAL_LIST_ITEMS%NUM_ITEMS_PAGE;
val = val==0?0:1;
noOfBtns=TOTAL_LIST_ITEMS/NUM_ITEMS_PAGE+val;
LinearLayout ll = (LinearLayout)findViewById(R.id.btnLay);
btns =new Button[noOfBtns];
for(int i=0;i<noOfBtns;i++)
{
btns[i] = new Button(this);
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setText(""+(i+1));
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.addView(btns[i], lp);
final int j = i;
btns[j].setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
new GetContacts().execute();
CheckBtnBackGroud(j);
}
});
}
}
private void CheckBtnBackGroud(int index)
{
title.setText("Page "+(index+1)+" of "+noOfBtns);
for(int i=0;i<noOfBtns;i++)
{
if(i==index)
{
btns[index].setBackgroundDrawable(getResources().getDrawable(R.drawable.box_green));
btns[i].setTextColor(getResources().getColor(android.R.color.white));
}
else
{
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setTextColor(getResources().getColor(android.R.color.black));
}
}
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(gotourl(), ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
int number = 0;
int start = number * NUM_ITEMS_PAGE;
// looping through All Contacts
// Getting JSON Array node
contacts = jsonObj.getJSONArray("result");
// looping through All Contacts
//for (int i = 0; i < contacts.length(); i++) {
for(int i=start;i<(start)+NUM_ITEMS_PAGE;i++) {
Integer a = contacts.length();
Log.d("loop", a.toString());
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("npi");
String name = c.getString("first_name");
String email = c.getString("last_name");
String gender = c.getString("type");
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put("npi", id);
contact.put("first_name", name);
contact.put("last_name", email);
//contact.put(TAG_PHONE_MOBILE, mobile);
contact.put("type", gender);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.d("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { "first_name", "last_name",
"type" }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}}

Below is my code to show list view with pagination. There is two blue button for change pages.
You can customize according to you need.
Create UserCategory.java
package com.UserCategory;
import java.net.URL;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
public class UserCategory extends Activity implements OnClickListener{
private final int PAGE_SIZE = 5;
private int StartingIndex = 0;
ArrayList<String> userClass=new ArrayList<String>();
int textlength=0;
private String lv_arr[];
private ListView lv1;
EditText searchText;
//Button Previous;
private String Machine[]={"Machine 1","Machine 2","Machine 3","Machine 4","Machine 5","Machine 6","Machine 7","Machine 8","Machine 9","Machine 10","Machine 11","Machine 12","Machine 1","Machine 2","Machine 3","Machine 4","Machine 5","Machine 6","Machine 7","Machine 8","Machine 9","Machine 10","Machine 11","Machine 12"};
ImageView next,Previous;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
searchText=(EditText)findViewById(R.id.et_Serchlist);
next=(ImageView)findViewById(R.id.btn_next);
Previous=(ImageView)findViewById(R.id.btn_previous);
next.setOnClickListener(this);
Previous.setOnClickListener(this);
//parsing();
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , Machine));
changeListViewModel(0);
}
private void changelist(int startingIndex) {
if(startingIndex < 0) {
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(1);
Previous.setVisibility(4);
startingIndex = 0;
}else if(startingIndex >= userClass.size())
startingIndex -= PAGE_SIZE;
StartingIndex = startingIndex;
int endingIndex = startingIndex + PAGE_SIZE;
System.out.println("ending index"+endingIndex);
if(StartingIndex!=0){
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(4);
Previous.setVisibility(1);
}
if(endingIndex == userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(1);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(4);
}
if(endingIndex != userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(4);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(1);
}
if(endingIndex > userClass.size()) endingIndex = userClass.size();
try {
String[] subSet = getDataSubset1(startingIndex, endingIndex);
System.out.println("subSet array"+subSet);
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , subSet));
} catch (Exception e) {
e.printStackTrace();
}
}
private String[] getDataSubset1(int startingIndex, int endingIndex){
String[] changeList = new String[endingIndex - startingIndex];
int index = -1;
for(int x = startingIndex; x < endingIndex; x++)
changeList[++index] = userClass.get(x);
return changeList;
}
private void changeListViewModel(int startingIndex){
if(startingIndex < 0) {
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(1);
Previous.setVisibility(4);
startingIndex = 0;
}
else if(startingIndex >= Machine.length){
startingIndex -= PAGE_SIZE;
}
System.out.println("strating"+startingIndex);
System.out.println("startingIndex"+startingIndex);
StartingIndex = startingIndex;
int endingIndex = startingIndex + PAGE_SIZE;
System.out.println("endingIndex"+endingIndex);
if(StartingIndex!=0)
{
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(4);
Previous.setVisibility(1);
}
if(endingIndex == userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(1);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(4);
}
if(endingIndex != userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(4);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(1);
}
System.out.println("ending index"+endingIndex);
if(endingIndex > Machine.length) {
endingIndex = Machine.length;
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(1);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(4);
}
String[] subSet = getDataSubset(startingIndex, endingIndex);
System.out.println("subSet main array"+subSet.length);
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , subSet));
}
private String[] getDataSubset(int startingIndex, int endingIndex){
String[] toRet = new String[endingIndex - startingIndex];
int index = -1;
System.out.println("index"+index);
for(int x = startingIndex; x < endingIndex; x++)
toRet[++index] = Machine[x];
return toRet;
}
private void parsing() {
// TODO Auto-generated method stub
try {
URL url = new URL("http://10.10.1.100/DogEventsWebService/EventService.svc/categories/1");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("UserCategory");
Machine = new String[nodeList.getLength()];
for (int i = 0; i < nodeList.getLength(); i++)
{
Node node = nodeList.item(i);
Machine[i] = new String();
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("ClassDescription");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
Machine[i]=((Node) nameList.item(0)).getNodeValue();
}
System.out.println("after for loop Machine"+Machine);
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.btn_next:
textlength=searchText.getText().length();
System.out.println("nextbutton"+textlength);
if(textlength==0){
changeListViewModel(StartingIndex + PAGE_SIZE);
}else{
changelist(StartingIndex + PAGE_SIZE);
}
break;
case R.id.btn_previous:
textlength=searchText.getText().length();
if(textlength==0){
changeListViewModel(StartingIndex - PAGE_SIZE);
}else{
changelist(StartingIndex - PAGE_SIZE);
}
break;
default:
break;
}
}
}
create main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<View android:layout_height="35dp"
android:layout_width="fill_parent"
android:background="#ffffff"/>
<TextView android:id="#+id/tv_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello"
android:layout_alignParentTop="true"
android:layout_marginLeft="0dp"
android:textSize="25dp"/>
<EditText
android:id="#+id/et_Serchlist"
android:layout_height="35dp"
android:paddingLeft="19dp"
android:layout_marginLeft="60dp"
android:layout_toRightOf="#+id/tv_header"
android:maxLength="20"
android:maxLines="1"
android:inputType="text"
android:hint="Search"
android:textColor="#ffffff"
android:background="#drawable/my_border"
android:layout_width="100dip"/>
<ListView
android:id="#+id/ListView01"
android:layout_width="fill_parent"
android:textSize="4px"
android:layout_below="#+id/tv_header"
android:layout_above="#+id/btn_previous"
android:layout_height="wrap_content" />
<View android:layout_height="55dp"
android:layout_below="#+id/ListView0"
android:layout_alignParentBottom="true"
android:layout_width="fill_parent"
android:background="#ffffff"/>
<ImageView
android:src="#drawable/grewprevious"
android:id="#+id/btn_Whiteprevious"
android:layout_width="wrap_content"
android:layout_marginLeft="12dp"
android:layout_marginBottom="6dp"
android:layout_below="#+id/ListView0"
android:visibility="invisible"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"/>
<ImageView
android:src="#drawable/right"
android:id="#+id/btn_grewforward"
android:layout_width="wrap_content"
android:layout_marginLeft="259dp"
android:layout_marginBottom="6dp"
android:layout_below="#+id/ListView0"
android:visibility="invisible"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"/>
<ImageView
android:src="#drawable/backward"
android:id="#+id/btn_previous"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginLeft="12dp"
android:layout_marginBottom="6dp"
android:layout_below="#+id/ListView0"
android:onClick="backButtonClicked"/>
<ImageView android:src="#drawable/forward"
android:id="#+id/btn_next"
android:layout_width="80dp"
android:layout_marginBottom="6dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_below="#+id/ListView0"
android:layout_marginLeft="249dp"
android:text="Next"
android:onClick="nextButtonClicked"/>
</RelativeLayout>
Create userlist.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView android:id="#+id/tv_className"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>
</LinearLayout>
Add my_border.xml into Drawable folder:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<stroke android:width="2dip" android:color="#ee777777" />
<solid android:color="#ee444444"/>
<padding
android:left="20dip"
android:top="2dip"
android:right="20dip"
android:bottom="2dip" />
<corners android:radius="15dip" />
![enter image description here][1]</shape>
If it give error for iamges then use any other images and run application.
Let me know it work for you.
Thanks

Android listview header

i have an app that is showing data in listview ,but i want first row to be inflated by diferent layout , and i did that but since there is gona be a big number of listitems , i want to optimize listview and there is issue. i cant optimize listview when iam filling listview on that way , so how can i put content that should go in fist row inside listview header witch is inflated by some layout ,here is the code of Adapter
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
LinearLayout content = (LinearLayout) findViewById(R.id.content);
LinearLayout refLayout = (LinearLayout) findViewById(R.id.refLayout);
refLayout.setVisibility(View.GONE);
mBtnNaslovnica = (Button) findViewById(R.id.mBtnNaslovnica);
mBtnNaslovnica.setSelected(true);
TextView txtView=(TextView) findViewById(R.id.scroller);
txtView.setSelected(true);
loadPage();
ImageButton mBtnRefresh = (ImageButton) findViewById(R.id.btnRefresh);
mBtnRefresh.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new LoadingTask().execute(URL);
}
});
}
public void loadPage(){
ArrayList<HashMap<String, String>> homeList = new ArrayList<HashMap<String, String>>();
JSONObject jsonobj;
try {
jsonobj = new JSONObject(getIntent().getStringExtra("json"));
JSONObject datajson = jsonobj.getJSONObject("data");
JSONArray news = datajson.getJSONArray(TAG_NEWS);
JSONArray actual = datajson.getJSONArray("actual");
for(int i = 0; i < news.length(); i++){
JSONObject c = news.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
String title = c.getString(TAG_TITLE);
String story = c.getString(TAG_STORY);
String shorten = c.getString(TAG_SH_STORY);
String author = c.getString(TAG_AUTHOR);
String datetime = c.getString(TAG_DATETIME);
String img = c.getString(TAG_IMG);
String big_img = c.getString(TAG_BIG_IMG);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_TITLE, title);
map.put(TAG_STORY, story);
map.put(TAG_IMG, img);
map.put(TAG_BIG_IMG, big_img);
map.put(TAG_DATETIME, datetime);
map.put(TAG_AUTHOR, author);
// adding HashList to ArrayList
homeList.add(map);}
for(int i = 0; i < actual.length(); i++){
JSONObject c = actual.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ACT_TIME);
String body = c.getString(TAG_ACT_BODY);
String anews = " | "+ id+ " " + body;
String cur_anews = ((TextView) findViewById(R.id.scroller)).getText().toString();
String complete = anews + cur_anews;
TextView anewstv = (TextView) findViewById(R.id.scroller);
anewstv.setText(complete);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
list=(ListView)findViewById(R.id.list);
// Getting adapter by passing xml data ArrayList
adapter=new LazyAdapter(this, homeList);
list.setAdapter(adapter);
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
String cur_title = ((TextView) view.findViewById(R.id.title)).getText().toString();
String cur_story = ((TextView) view.findViewById(R.id.einfo2)).getText().toString();
String cur_author = ((TextView) view.findViewById(R.id.einfo1)).getText().toString();
String cur_datetime = ((TextView) view.findViewById(R.id.tVdatetime)).getText().toString();
String cur_actual = ((TextView) findViewById(R.id.scroller)).getText().toString();
ImageView cur_img = (ImageView) view.findViewById(R.id.list_image);
String cur_img_url = (String) cur_img.getTag();
Intent i = new Intent("com.example.androidhive.CURENTNEWS");
i.putExtra("CUR_TITLE", cur_title);
i.putExtra("CUR_STORY", cur_story);
i.putExtra("CUR_AUTHOR", cur_author);
i.putExtra("CUR_DATETIME", cur_datetime);
i.putExtra("CUR_IMG_URL", cur_img_url);
i.putExtra("CUR_ACTUAL", cur_actual);
startActivity(i);
}
});
}
public void reloadPage(String jsonstring){
ArrayList<HashMap<String, String>> homeList = new ArrayList<HashMap<String, String>>();
JSONObject jsonobj;
try {
jsonobj = new JSONObject(jsonstring);
JSONObject datajson = jsonobj.getJSONObject("data");
JSONArray news = datajson.getJSONArray(TAG_NEWS);
JSONArray actual = datajson.getJSONArray("actual");
for(int i = 0; i < news.length(); i++){
JSONObject c = news.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
String title = c.getString(TAG_TITLE);
String story = c.getString(TAG_STORY);
String shorten = c.getString(TAG_SH_STORY);
String author = c.getString(TAG_AUTHOR);
String datetime = c.getString(TAG_DATETIME);
String img = c.getString(TAG_IMG);
String big_img = c.getString(TAG_BIG_IMG);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_TITLE, title);
map.put(TAG_STORY, story);
map.put(TAG_IMG, img);
map.put(TAG_BIG_IMG, big_img);
map.put(TAG_DATETIME, datetime);
map.put(TAG_AUTHOR, author);
// adding HashList to ArrayList
homeList.add(map);}
for(int i = 0; i < actual.length(); i++){
JSONObject c = actual.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ACT_TIME);
String body = c.getString(TAG_ACT_BODY);
String anews = " | "+ id+ " " + body;
String cur_anews = ((TextView) findViewById(R.id.scroller)).getText().toString();
String complete = anews + cur_anews;
TextView anewstv = (TextView) findViewById(R.id.scroller);
anewstv.setText(complete);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
list=(ListView)findViewById(R.id.list);
// Getting adapter by passing xml data ArrayList
adapter=new LazyAdapter(this, homeList);
list.setAdapter(adapter);
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
String cur_title = ((TextView) view.findViewById(R.id.title)).getText().toString();
String cur_story = ((TextView) view.findViewById(R.id.einfo2)).getText().toString();
String cur_author = ((TextView) view.findViewById(R.id.einfo1)).getText().toString();
String cur_datetime = ((TextView) view.findViewById(R.id.tVdatetime)).getText().toString();
String cur_actual = ((TextView) findViewById(R.id.scroller)).getText().toString();
ImageView cur_img = (ImageView) view.findViewById(R.id.list_image);
String cur_img_url = (String) cur_img.getTag();
Intent i = new Intent("com.example.androidhive.CURENTNEWS");
i.putExtra("CUR_TITLE", cur_title);
i.putExtra("CUR_STORY", cur_story);
i.putExtra("CUR_AUTHOR", cur_author);
i.putExtra("CUR_DATETIME", cur_datetime);
i.putExtra("CUR_IMG_URL", cur_img_url);
i.putExtra("CUR_ACTUAL", cur_actual);
startActivity(i);
}
});
}
public void startNewActivity(){
}
public class LoadingTask extends AsyncTask<String, Object, Object>{
XMLParser parser = new XMLParser();
JSONParser jParser = new JSONParser();
LinearLayout content = (LinearLayout) findViewById(R.id.content);
LinearLayout refLayout = (LinearLayout) findViewById(R.id.refLayout);
protected void onPreExecute(){
content.setClickable(false);
refLayout.setVisibility(View.VISIBLE);
}
#Override
protected Object doInBackground(String... params) {
// TODO Auto-generated method stub
String URL = params[0];
JSONObject json = jParser.getJSONFromUrl(URL);
//String xml = parser.getXmlFromUrl(URL); // getting XML from URL
// getting DOM element
return json;
}
protected void onPostExecute(Object result){
String json;
json = result.toString();
reloadPage(json);
refLayout.setVisibility(View.GONE);
}
}
}

If I got your point - you can go with 2 approaches:
Add headerView to the list. That is just easy as inflate your View and pass it to
addHeaderView(View) of your List. Note: you must add this view before setting the adapter, or it will throw the exception.
However, as your 'header' is representing the same data as all other items, but has different layout - I suggest not to use Header here. Instead, try to implement getItemViewType() in your adapter. http://developer.android.com/reference/android/widget/BaseAdapter.html#getItemViewType(int)
If you'll do - you'll have ability to check which type of layout to return in getView() method. And Android will take care of optimizing and reusing your inflated Views for you, so you can be sure that convertView, passed to your getView will be of the right type and layout.
Please let me know if I should explain with more details.

You can do it like this:
...
convertView.setOnClickListener(new OnItemClick(position));
...
public class OnItemClick implements OnClickListener {
private final int index;
public OnItemClick(int _index) {
this.index = _index;
}
#Override
public void onClick(View v) {
//dosomething
}
}

Saving Android Preferences

Hi, I have a listview and i'm wanting it so that when you press on an item it stores your selection in shared preferences. The purpose for this is so that next time I open the app it skips the selection process.
So what I'm wanting to know is how do I incorporate this function into my code?
Here is my code so far:
public class SelectTeamActivity extends ListActivity {
public String fulldata = null;
public String position = null;
public String divisionName= null;
public List<String> teamsList = null;
public String divName = null;
protected void loadData() {
fulldata = getIntent().getStringExtra("fullData");
position = getIntent().getStringExtra("itemIndex");
Log.v("lc", "selectteamActivity:" + fulldata);
Log.v("lc", "position:" + position);
int positionInt = Integer.parseInt(position);
try{
JSONObject obj = new JSONObject(fulldata);
teamsList = new ArrayList<String>();
JSONObject objData = obj.getJSONObject("data");
JSONArray teamInfoArray = objData.getJSONArray("structure");
for(int r = 0; r < teamInfoArray.length(); r++ ){
JSONObject teamFeedStructureDict = teamInfoArray.getJSONObject(r);
JSONArray teamStructureArray =
(JSONArray) teamFeedStructureDict.get("divisions");
JSONObject teamFeedDivisionsDictionary =
teamStructureArray.getJSONObject(positionInt);
divName = teamFeedDivisionsDictionary.getString("name");
JSONArray teamNamesArray =
(JSONArray) teamFeedDivisionsDictionary.get("teams");
for(int t = 0; t < teamNamesArray.length(); t++){
JSONObject teamNamesDict = teamNamesArray.getJSONObject(t);
teamsList.add(teamNamesDict.getString("name"));
}
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.selectact);
loadData();
TextView headerText = (TextView) findViewById(R.id.header_text);
headerText.setText(divName);
TextView redHeaderText = (TextView) findViewById(R.id.redheadertext);
redHeaderText.setText("Please select your team:");
setListAdapter( new ArrayAdapter<String>(this, R.layout.single_item,
teamsList));
ListView list = getListView();
list.setTextFilterEnabled(true);
}
#Override
protected void onListItemClick (ListView l, View v, int position, long id) {
Intent intent = new Intent(this, HomeActivity.class);
String curPos = Integer.toString(position);
//or just use the position:
intent.putExtra("itemIndex", curPos);
intent.putExtra("fullData", fulldata); //or just the part you want
startActivity(intent);
}
}

In your Activity's onCreate():
SharedPreferences preferences = getSharedPreferences("preferences", MODE_WORLD_WRITEABLE);
In your onListItemClick():
preferences.edit().putInt("KEY", position).commit();
Everywhere in your project:
int position = preferences.getInt("KEY", -1);
(-1 is a default value that means when there is no value with the given key, return this value)