android How to limit ListView items displayed?

android How to limit ListView items displayed? - android

Now I am using Local database to get and display item on application but I want to split the items and display them in different pages 1,2,3 and so on. How do I do that? This is the Code to display data and display all the items in ListView format. What do I do to limit the number of items on List? And please tell me where to make changes too, if you know.. Thanks
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
mToggle = new ActionBarDrawerToggle(this,mDrawerLayout,R.string.open,R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
NavigationView navigationView = (NavigationView)findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(this);
listView = (ListView)findViewById(R.id.listView);
adapter = new ArrayAdapter<String> (this,android.R.layout.simple_list_item_1);
listView.setAdapter(adapter);
new Connection().execute();
btn =(Button) findViewById(R.id.button2);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
openActivity2();
}
});
}
private void openActivity2() {
Intent in = new Intent(this,Main2Activity.class);
startActivity(in);
}
#Override
public void onPointerCaptureChanged(boolean hasCapture) {
}
class Connection extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... strings) {
String result = "";
String host = "http://10.0.3.2/Client/docks.php";
try
{
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet();
request.setURI(new URI(host));
HttpResponse response = client.execute(request);
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer stringBuffer = new StringBuffer("");
String line = "";
while ((line = reader.readLine())!=null)
{
stringBuffer.append(line);
break;
}
reader.close();
result = stringBuffer.toString();
}
catch(Exception e)
{
return new String("There exception: "+e.getMessage());
}
return result;
}
#Override
protected void onPostExecute(String result)
{
Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
try {
JSONObject jsonResult = new JSONObject(result);
int success = jsonResult.getInt("success");
if(success==1)
{
JSONArray data = jsonResult.getJSONArray("abc");
for(int i = 0; i < data.length(); i++)
{
JSONObject data1 = data.getJSONObject(i);
int id = data1.getInt("dock_id");
String name = data1.getString("dock_name");
String description = data1.getString("dock_desc");
int flightarrival = data1.getInt("flight_arrival");
int count = data1.getInt("trolley_count");
String time = data1.getString("snapshot_time");
String line = id+"."+name+"-"+count+"-"+flightarrival+"-"+time;
adapter.add(line);
}
}
else
{
Toast.makeText(getApplicationContext(), "there is no data", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
if(mToggle.onOptionsItemSelected(item))
{
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if( id == R.id.home)
{
Toast.makeText(this,"This is home", Toast.LENGTH_SHORT).show();
}
if( id == R.id.trolleycount)
{
Toast.makeText(this,"This is trolleycount", Toast.LENGTH_SHORT).show();
}
if( id == R.id.log)
{
Intent in = new Intent(this,MainActivity.class);
startActivity(in);
Toast.makeText(this,"You have successfully logged out of your account", Toast.LENGTH_SHORT).show();
}
return false;
}

Looks like you could modify this code in your onPostExecute() method:
JSONArray data = jsonResult.getJSONArray("abc");
for(int i = 0; i < data.length(); i++)
{
...
adapter.add(line);
}
What you could do is change your loop condition to check that i is less than both data.length() and also whatever limit you want to impose. Let's say your limit is 100:
JSONArray data = jsonResult.getJSONArray("abc");
for(int i = 0; i < Math.min(100, data.length()); i++)
{
...
adapter.add(line);
}
The Math.min() method will return whichever of the two numbers is smaller, so you'll get data.length() items when there are fewer than 100 items and you'll get 100 items when there are more.

Related

API not displaying correct value for food calories

I'm currently developing a Calorie app where the user enter a food and uses an api food database to retrieve the calories. For some reason every time I enter a food it retrieves the same value. I'm not sure why its giving me this value.
Thanks in advance. I'm new to android studio and using API.
AddEntry.java
public class AddEntry extends Fragment implements View.OnClickListener {
EditText FoodET,CalorieET;
ImageButton Savebtn, Cancelbtn;
Button searchbutton;
String foodET,calorieET;
//database
private DatabaseHandler dba;
public AddEntry() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View myView = inflater.inflate(R.layout.fragment_add_entry, container,
false);
Savebtn = (ImageButton) myView.findViewById(R.id.SaveBtn);
Savebtn.setBackgroundColor(Color.TRANSPARENT);
Savebtn.setOnClickListener(this);
searchbutton = (Button) myView.findViewById(R.id.SearchButton);
searchbutton.setOnClickListener(this);
Cancelbtn = (ImageButton) myView.findViewById(R.id.CancelBtn);
Cancelbtn.setBackgroundColor(Color.TRANSPARENT);
Cancelbtn.setOnClickListener(this);
return myView;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
FoodET= (EditText)view.findViewById(R.id.foodEditText);
FoodET.setInputType(InputType.TYPE_CLASS_TEXT);
CalorieET=(EditText)view.findViewById(R.id.caloriesEditText);
CalorieET.setInputType(InputType.TYPE_CLASS_NUMBER);
foodET = ((EditText)
view.findViewById(R.id.foodEditText)).getText().toString();
calorieET = ((EditText)
view.findViewById(R.id.caloriesEditText)).getText().toString();
}
public void saveDataToDB (){
Food food = new Food();
String FoodName = FoodET.getText().toString().trim();
String calString = CalorieET.getText().toString().trim();
//convert the claories numbers to text
if (!calString.equals("")) {
int cal = Integer.parseInt(calString);
food.setFoodName(FoodName);
food.setCalories(cal);
//call addFood method from the DatabaseHandler
dba.addFood(food);
dba.close();
//clear the editTexts
FoodET.setText("");
CalorieET.setText("");
//take the user to the next screen
//
((appMain) getActivity()).loadSelection(0);
;
}
else
{
Toast.makeText(getActivity(), "Please enter information",
Toast.LENGTH_LONG).show();
}
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.SearchButton:
FoodSearch search = new FoodSearch(foodET, CalorieET );
search.execute();
break;
case R.id.SaveBtn:
foodET = FoodET.getText().toString();
calorieET=CalorieET.getText().toString();
if (FoodET.getText().toString().equals(null) ||
CalorieET.getText().toString().equals(null)||
CalorieET.getText().toString().equals("")){
Toast.makeText(getActivity(), "Please enter information",
Toast.LENGTH_LONG).show();
}
((appMain) getActivity()).loadSelection(0);
break;
case R.id.CancelBtn:
// EditText descriptionET=
(EditText)getView().findViewById(R.id.foodEditText);
//descriptionET.setText("");
//EditText calorieET=
(EditText)getView().findViewById(R.id.caloriesEditText);
//calorieET.setText("");
((appMain) getActivity()).loadSelection(0);
break;
}
}
#Override
public void onDestroy() {
super.onDestroy();
}
#Override
public void onDetach() {
super.onDetach();
}
private class FoodSearch extends AsyncTask<Void, Void, String> {
String food;
EditText calories;
FoodSearch(String food, EditText calories){
this.food = food;
this.calories = calories;
}
#Override
protected String doInBackground(Void... params) {
try {
food = food.replaceAll(" ", "%20");
URL url = new URL("http://api.nal.usda.gov/ndb/search/?
format=JSON&q=" + food +
"&max=1&offset=0&sort=r&api_
key=2PmoCzLAhkNUeJcwq2VfOaSNY66UgFVDEcco2qMP");
HttpURLConnection urlConnection = (HttpURLConnection)
url.openConnection();
try {
BufferedReader bufferedReader = new BufferedReader(new
InputStreamReader(urlConnection.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
bufferedReader.close();
String result = stringBuilder.toString();
if(result.contains("zero results")) {
String s = "empty";
return s;
}
JSONObject object = (JSONObject) new
JSONTokener(result).nextValue();
JSONObject list = object.getJSONObject("list");
JSONArray items = list.getJSONArray("item");
String item = items.get(0).toString();
int i = item.indexOf("ndbno\":\"") + 8;
int f = item.indexOf("\"", i);
String ndbno = item.substring(i,f);
Log.d("DEBUG", ndbno);
URL url2 = new URL("http://api.nal.usda.gov/ndb/reports/?
ndbno=" + ndbno +
"&type=b&format=JSON&api_
key=2PmoCzLAhkNUeJcwq2VfOaSNY66UgFVDEcco2qMP");
HttpURLConnection urlConnection2 = (HttpURLConnection)
url2.openConnection();
BufferedReader bufferedReader2 = new BufferedReader(new
InputStreamReader(urlConnection2.getInputStream()));
StringBuilder stringBuilder2 = new StringBuilder();
String line2;
while ((line2 = bufferedReader2.readLine()) != null) {
stringBuilder2.append(line2).append("\n");
}
bufferedReader2.close();
String res = stringBuilder2.toString();
int index = res.indexOf("\"unit\": \"kcal\",") + 46;
int index2 = res.indexOf("\"", index);
String calories = res.substring(index,index2);
urlConnection2.disconnect();
return calories;
}
finally{
urlConnection.disconnect();
}
}
catch(Exception e) {
Log.e("ERROR", e.getMessage(), e);
String s = "empty";
return s;
}
}
protected void onPostExecute(String response) {
if(!response.isEmpty() && !response.equals("empty")) {
calories.setText(response);
} else {
AlertDialog foodNotFound = new
AlertDialog.Builder(getContext()).create();
foodNotFound.setTitle("Error");
foodNotFound.setMessage("Food not found :(");
foodNotFound.setButton(AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int
which) {
dialog.dismiss();
}
});
}
}
}
}

I need to set my app content offline

I am getting my content from json through server.I have two TextView and one ImageView in my layout.i have written the content from json to a file. but i not able to set my data while offline
I am getting the data from a file also.
MainActivity.java:
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private Context context;
private NavigationView mNavigationView;
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
NewsAdapter adapter;
ArrayList<News> Newslist;
private Toolbar mToolbar;
private ProgressDialog pDialog;
private String TAG = MainActivity.class.getSimpleName();
private static String url = "https://www.amrita.edu/amrita_api/v1/news_android.jsonp";
String image;
String imageurl;
ArrayList<HashMap<String, String>> arraylist;
// ArrayList<String> newsList = new ArrayList<String>();
WebView descWView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_json);
Newslist = new ArrayList<News>();
context=getApplicationContext();
//initViews();
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle(R.string.title);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setIcon(R.drawable.app_icon);
initViews();
initContentWebView();
setUpNavDrawer();
new GetContacts().execute();
}
private void initViews(){
mNavigationView = (NavigationView) findViewById(R.id.navigation_view);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
}
void initContentWebView(){
String htmlText = " %s ";
// ArrayList<String> myData = newsList;
// descWView = (WebView) findViewById(R.id.content_wview);
// String htmlData= "<html><body style='text-align:justify;font-size:"+getResources().getInteger(R.integer.main_text)+"px'><p>'sajhdsakjc;osalcjklsx'</p>"+myData.toString()+"</body></Html >";
//descWView.getSettings().setDefaultTextEncodingName("utf-8");
// descWView.loadData(htmlData, "text/html", "utf-8");
// descWView.loadDataWithBaseURL(String.format(htmlText, htmlData), String.valueOf(myData), "text/html", "UTF-8", String.format(htmlText, htmlData));
// descWView.s(myData);
}
private void setUpNavDrawer() {
mDrawerToggle=new ActionBarDrawerToggle(this,mDrawerLayout,mToolbar,R.string.drawer_open,R.string.drawer_close);
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerToggle.syncState();
mNavigationView.setNavigationItemSelectedListener(this);
}
public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);
String item=menuItem.getTitle().toString();
String dPath=menuItem.getTitleCondensed().toString();
if(item.equals("News")){
//this.finish();
mDrawerLayout.closeDrawers();
Intent intent = new Intent(context, MainActivity.class);
startActivity(intent);
this.finish();
//Toast.makeText(getApplicationContext(), "god", Toast.LENGTH_SHORT).show();
}
else if(item.equals("Events")){
mDrawerLayout.closeDrawers();
Intent intent = new Intent(context, EventActivity.class);
startActivity(intent);
this.finish();
Toast.makeText(getApplicationContext(), "god1", Toast.LENGTH_SHORT).show();
}
else if(item.equals("Latest Publications")){
mDrawerLayout.closeDrawers();
Toast.makeText(getApplicationContext(), "god2", Toast.LENGTH_SHORT).show();
} else if(item.equals("Students Achivements")){
mDrawerLayout.closeDrawers();
Toast.makeText(getApplicationContext(), "god3", Toast.LENGTH_SHORT).show();
}
else if(item.equals("Important Announcements")){
mDrawerLayout.closeDrawers();
Toast.makeText(getApplicationContext(), "god4", Toast.LENGTH_SHORT).show();
}
else if(item.equals("Research")){
mDrawerLayout.closeDrawers();
Intent intent = new Intent(context, ResearchActivity.class);
startActivity(intent);
this.finish();
//Toast.makeText(getApplicationContext(), "god5", Toast.LENGTH_SHORT).show();
}
else if(item.equals("Ranking")){
mDrawerLayout.closeDrawers();
//Toast.makeText(getApplicationContext(), "god6", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, RankingActivity.class);
startActivity(intent);
this.finish();
}
else if(item.equals("International")){
mDrawerLayout.closeDrawers();
//Toast.makeText(getApplicationContext(), "god7", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, InternationalActivity.class);
startActivity(intent);
this.finish();
}
else if(item.equals("About")){
mDrawerLayout.closeDrawers();
Intent intent = new Intent(context, AboutActivity.class);
startActivity(intent);
this.finish();
// Toast.makeText(getApplicationContext(), "god8", Toast.LENGTH_SHORT).show();
}
else if(item.equals("Contact Us")) {
mDrawerLayout.closeDrawers();
// Toast.makeText(getApplicationContext(), "god9", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, ContactUs.class);
intent.putExtra("keyId", item);
intent.putExtra("descPath",dPath);
startActivity(intent);
// this.finish();
}
return true;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_share) {
/*Intent intent=new Intent(context,AboutActivity.class);
startActivity(intent);
return true;*/ Toast.makeText(getApplicationContext(), "msg msg", Toast.LENGTH_SHORT).show();
}
return super.onOptionsItemSelected(item);
}
/**
* Async task class to get json by making HTTP call
*/
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) {
HttpHandler sh = new HttpHandler();
// arraylist = new ArrayList<HashMap<String, String>>();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
JSONArray jsonarray = null;
try {
jsonarray = new JSONArray(jsonStr);
for (int i = 0; i <jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
News news = new News();
JSONObject jsonobject = jsonarray.getJSONObject(i);
JSONObject jsonimage=jsonobject.getJSONObject("image");
//Log.d(String.valueOf(jsonimage), String.valueOf(jsonimage.length()));
String imageurl=jsonimage.getString("filename");
// System.out.println(imageurl);
// Retrive JSON Objects
news.setTitle(jsonobject.getString("title"));
news.setBody(jsonobject.getString("body"));
// news.setImage(jsonobject.getString("image"));
news.setImage(jsonimage.getString("filename"));
// Set the JSON Objects into the array
Newslist.add(news);
/*image = jsonobject.getString("image");
String title = jsonobject.getString("title");
String content = jsonobject.getString("content");
newsList.add(image);
newsList.add(title);
newsList.add(content);*/
// Log.d(newsList.get(i),"image");
// Log.d(title,"title");
// System.out.println("All MinQuantitiy"+newsList);
}
} catch (JSONException e) {
e.printStackTrace();
}
/* try {
JSONObject jsonObj = new JSONObject(jsonStr);
Log.d(jsonStr,"json");
// Getting JSON Array node
JSONArray contacts = jsonObj.getJSONArray("news");
// looping through All Contacts
*//*for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("id");
String name = c.getString("name");
String email = c.getString("email");
String address = c.getString("address");
String gender = c.getString("gender");
// Phone node is JSON Object
JSONObject phone = c.getJSONObject("phone");
String mobile = phone.getString("mobile");
String home = phone.getString("home");
String office = phone.getString("office");
// tmp hash map for single contact
HashMap<String, String> contact = new HashMap<>();
// adding each child node to HashMap key => value
contact.put("id", id);
contact.put("name", name);
contact.put("email", email);
contact.put("mobile", mobile);
// adding contact to contact list
contactList.add(contact);
}*//*
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}*/
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
int sizeofarray= Newslist.size();
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
viewPager.setAdapter(new CustomPagerAdapter(context,sizeofarray ));
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
TextView tvtitle=(TextView)findViewById(R.id.tvtitle);
TextView tvbody=(TextView)findViewById(R.id.tvbody);
ImageView im=(ImageView)findViewById(R.id.NewsImage);
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
for(position=0;position<20;position++) {
tvtitle.setText(Newslist.get(position).getTitle());
tvbody.setText(Newslist.get(position).getBody());
// Toast.makeText(getApplicationContext(),position//, Toast.LENGTH_LONG).show();
}
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
// im.setImageResource(String.format("https://www.amrita.edu/sites/default/files/%s", Newslist.get().getImage()));
Toast.makeText(getApplicationContext(),"sizeNewslist"+sizeofarray, Toast.LENGTH_LONG).show();
// Updating parsed JSON data into ListView
/*for(int i=1;i<3;i++){
Toast.makeText(getApplicationContext(),
"aaa"+newsLists,
Toast.LENGTH_LONG)
.show();
}*/
/* ListAdapter adapter = new SimpleAdapter(
MainActivity.this, newsList,
R.layout.list_item, new String[]{"name", "email",
"content"}, new int[]{R.id.image,
R.id.title, R.id.co});
lv.setAdapter(adapter);*/
}
}
}
/* public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}*/
adapter class
public class CustomPagerAdapter extends PagerAdapter {
String image_url;
private Context mContext;
int size;
ArrayList<News> Newslist;
File file,file1;
StringBuffer buffer,buffer1;
DataHandler handler;
public CustomPagerAdapter(Context context, int arraysize, ArrayList<News> newslist) {
mContext = context;
size=arraysize;
Newslist=newslist;
}
#Override
public Object instantiateItem(ViewGroup collection, int position) {
ModelObject modelObject = ModelObject.values()[position];
LayoutInflater inflater = LayoutInflater.from(mContext);
ViewGroup layout = (ViewGroup) inflater.inflate(R.layout.row, collection, false);
collection.addView(layout);
TextView tvtitle=(TextView)layout.findViewById(R.id.tvtitle);
TextView tvbody=(TextView)layout.findViewById(R.id.tvbody);
ImageView im=(ImageView)layout.findViewById(R.id.NewsImage);
im.setScaleType(ImageView.ScaleType.FIT_XY);
SugarContext.init(mContext);
ConnectivityManager ConnectionManager=(ConnectivityManager)mContext.getSystemService(mContext.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo=ConnectionManager.getActiveNetworkInfo();
if(networkInfo != null && networkInfo.isConnected()==true )
{
tvtitle.setText(Html.fromHtml(Newslist.get(position).getTitle()));
tvbody.setText(Html.fromHtml(Newslist.get(position).getBody()));
image_url = "https://www.amrita.edu/sites/default/files/" + Newslist.get(position).getImage();
Picasso.with(mContext).load(image_url).into(im);
/*****************88*/
ArrayList<News> content = Newslist;
// String content="hello";
File file,file1;
FileOutputStream outputStream,outputStream1;
try {
//file = File.createTempFile("MyCache", null,getCacheDir());
file = new File(mContext.getCacheDir(), "newstitle");
file1 = new File(mContext.getCacheDir(), "newsbody");
outputStream = new FileOutputStream(file);
outputStream1 = new FileOutputStream(file1);
outputStream.write(content.get(position).getTitle().getBytes());
outputStream1.write(content.get(position).getBody().getBytes());
//outputStream.write(Integer.parseInt(content.get(position).getImage()));
// outputStream.write(Integer.parseInt(content.get(position).getTitle()));
// outputStream.write(Integer.parseInt(content.get(position).getBody()));
outputStream.close();
Log.d("filecreated", String.valueOf(file));
} catch (IOException e) {
e.printStackTrace();
}
BufferedReader input = null;
BufferedReader input1=null;
file = null;
file1=null;
try {
file = new File(mContext.getCacheDir(), "newstitle");
file1 = new File(mContext.getCacheDir(), "newsbody");// Pass getFilesDir() and "MyFile" to read file
input = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
input1 = new BufferedReader(new InputStreamReader(new FileInputStream(file1)));
String line,line1;
buffer = new StringBuffer();
buffer1 = new StringBuffer();
while ((line = input.readLine()) != null) {
buffer.append(line);
}
while ((line1 = input1.readLine()) != null) {
buffer1.append(line1);
}
String s=buffer.toString();
String t=buffer1.toString();
//Log.d("bufferdsample", buffer.toString());
Toast.makeText(mContext, "asas"+s, Toast.LENGTH_LONG).show();
Toast.makeText(mContext, "body"+t, Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
/*****************************88*/
/* try {
handler = new DataHandler(mContext);
handler.open();
} catch (Exception e) {
Toast.makeText(mContext, "exc " + e,
Toast.LENGTH_SHORT).show();
}
handler.insertData(Newslist.get(position).getImage(),Newslist.get(position).getTitle(),Newslist.get(position).getBody());
*/
Toast.makeText(mContext, "Network Available", Toast.LENGTH_LONG).show();
}
else
{
BufferedReader input = null;
BufferedReader input1=null;
file = null;
file1=null;
try {
file = new File(mContext.getCacheDir(), "newstitle");
file1 = new File(mContext.getCacheDir(), "newsbody");// Pass getFilesDir() and "MyFile" to read file
input = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
input1 = new BufferedReader(new InputStreamReader(new FileInputStream(file1)));
String line,line1;
buffer = new StringBuffer();
buffer1 = new StringBuffer();
while ((line = input.readLine()) != null) {
buffer.append(line);
}
while ((line1 = input1.readLine()) != null) {
buffer1.append(line1);
}
String s=buffer.toString();
String t=buffer1.toString();
//Log.d("bufferdsample", buffer.toString());
Toast.makeText(mContext, "asas"+s, Toast.LENGTH_LONG).show();
Toast.makeText(mContext, "body"+t, Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
}
Toast.makeText(mContext, "Network Available", Toast.LENGTH_LONG).show();
/* image_url = "https://www.amrita.edu/sites/default/files/" + Newslist.get(position).getImage();
Picasso.with(mContext).load(image_url).into(im);*/
}
/* String fileName="cachefile";
try {
cacheThis.writeObject(mContext, fileName, Newslist);
} catch (IOException e) {
e.printStackTrace();
}
try {
Newslist.addAll((List<News>) cacheThis.readObject(mContext, fileName));
Log.d("aaasasa", String.valueOf(Newslist));
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}*/
// ImageLoader class instance
// whenever you want to load an image from url
// call DisplayImage function
// url - image url to load
// loader - loader image, will be displayed before getting image
// image - ImageView
//im.setImageBitmap(getBitmapFromURL("https://3.bp.blogspot.com/-yEE6FqiglKw/VeBH_MmGGzI/AAAAAAAAbHE/HUYcYvkIwl0/s1600/AndroidImageViewSetImageFromURL2.png"));
// im.setImageResource(Uri.parse("https://www.amrita.edu/sites/default/files/%s", Newslist.get(position).getImage()));
// new DownloadImageTask(im).execute("https://www.amrita.edu/sites/default/files/" + Newslist.get(position).getImage());
return layout;
}
/*public void ofline(View view){
String filr_name="newfile";
FileOutputStream fileOutputStream = mContext.OpenfileOutput(filr_name,MODE_PRIVATE)
}
public void readmessage(View view){
}*/
#Override
public void destroyItem(ViewGroup collection, int position, Object view) {
collection.removeView((View) view);
}
#Override
public int getCount() {
return size;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
#Override
public CharSequence getPageTitle(int position) {
ModelObject customPagerEnum = ModelObject.values()[position];
return mContext.getString(customPagerEnum.getTitleResId());
}
}

When device is offline you can import /read from a File or database which contains this json value . After getting internet update the database or file .
For file you must make or move the file in
Environment.getExternalStorageDirectory();
And for writing in a file follow the code
private void writeToFile(String data,Context context) {
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(context.openFileOutput("test.txt", Context.MODE_PRIVATE));
outputStreamWriter.write(data);
outputStreamWriter.close();
}
catch (IOException e) {
Log.e("Exception", "File write failed: " + e.toString());
}
}
And reading from external storage follow the following code
private String readFromFile(Context context) {
String ret = "";
try {
InputStream inputStream = context.openFileInput("test.txt");
if ( inputStream != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();
while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append(receiveString);
}
inputStream.close();
ret = stringBuilder.toString();
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}
return ret;
}

Android Spinner's random item id not getting properly

I have a android spinner like this
First one is item name and second one is their respective item id.I want to send respective item id to server when item name is selected and I don't want to desplay item id also.How to resolve this here is my code:
public class Form extends BaseActivity implements AdapterView.OnItemClickListener {
private static final String REGISTER_URL = "http://url/Service.asmx/GenerateTicket";
public static final String PREFS_NAME = "MyPrefsFile";
public static final String CUSTOMERID = "customerId";
public static final String USERNAME = "name";
public static final String HOUSENO = "houseNo";
public static final String LOCALITY = "areaName";
public static final String SERVICE = "serviceId";
public static final String MOBILE = "mobile";
public static final String EMAIL = "email";
public static final String PROBLEM = "jobBrief";
private ProgressDialog pDialog;
Spinner spin;
// flag for Internet connection status
Boolean isInternetPresent = false;
// Connection detector class
ConnectionDetector cd;
// ArrayList<String> listItems = new ArrayList<>();
// ArrayAdapter<String> adapter;
private List<Item> customerList = new ArrayList<Item>();
private SpinAdapter adapter;
private List<Item> items;
private EditText editname, houseNo, mobile, email, problem;
Spinner service_need;
AutoCompleteTextView autoCompView;
String obj;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getLayoutInflater().inflate(R.layout.activity_form, frameLayout);
autoCompView = (AutoCompleteTextView) findViewById(R.id.colony);
autoCompView.setAdapter(new GooglePlacesAutocompleteAdapter(this, R.layout.list_item));
autoCompView.setOnItemClickListener(this);
editname = (EditText) findViewById(R.id.name);
houseNo = (EditText) findViewById(R.id.houseNo);
//
mobile = (EditText) findViewById(R.id.mobile);
email = (EditText) findViewById(R.id.email);
problem = (EditText) findViewById(R.id.problem);
Button submit = (Button) findViewById(R.id.submit);
pDialog = new ProgressDialog(this);
cd = new ConnectionDetector(getApplicationContext());
// get Internet status
isInternetPresent = cd.isConnectingToInternet();
//
assert submit != null;
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (editname.getText().toString().trim().equals("")) {
Toast.makeText(getApplicationContext(),
"Please enter your name", Toast.LENGTH_SHORT)
.show();
} else if (houseNo.toString().trim().equals("")) {
Toast.makeText(Form.this, "Please enter your house no", Toast.LENGTH_SHORT).show();
} else if (autoCompView.toString().trim().equals("")) {
Toast.makeText(Form.this, "Please enter your locality", Toast.LENGTH_SHORT).show();}
// } else if (service_need.getSelectedItem().toString().trim().equals("Select Service")) {
// Toast.makeText(Form.this, "Please Select item", Toast.LENGTH_SHORT).show();
//
// }
else if (mobile.toString().trim().equals("")) {
Toast.makeText(Form.this, "Please enter your mobile number", Toast.LENGTH_SHORT).show();
}
else if (mobile.getText().length() < 10) {
Toast.makeText(getApplicationContext(),
"Please enter valid mobile number", Toast.LENGTH_SHORT)
.show();
}
else if (problem.toString().trim().equals("")) {
Toast.makeText(Form.this, "Please describe your problem", Toast.LENGTH_SHORT).show();
}
else if (!email.getText().toString().trim().equals(""))
{
if (!android.util.Patterns.EMAIL_ADDRESS.matcher(
email.getText().toString().trim()).matches()) {
Toast.makeText(getApplicationContext(),
"Please enter valid e-mail id", Toast.LENGTH_SHORT)
.show();
}
else {
if (isInternetPresent) {
registerUser();
pDialog.setMessage("Loading...");
pDialog.show();
Toast.makeText(getApplicationContext(),
"connecting...", Toast.LENGTH_SHORT)
.show();
} else {
Toast.makeText(Form.this, "Unable to connect the server, please check your data settings", Toast.LENGTH_LONG)
.show();
}
}
}
else {
// Do your stuff
if (isInternetPresent) {
registerUser();
pDialog.setMessage("Loading...");
pDialog.show();
Toast.makeText(getApplicationContext(),
"connecting...", Toast.LENGTH_SHORT)
.show();
}
else {
Toast.makeText(Form.this, "Unable to connect the server, please check your data settings", Toast.LENGTH_LONG)
.show();
}
}
}
});
//
spin = (Spinner) findViewById(R.id.service_need);
adapter = new SpinAdapter(this, customerList);
spin.setAdapter(adapter);
}
private void registerUser() {
final SharedPreferences mSharedPreference= PreferenceManager.getDefaultSharedPreferences(getBaseContext());
final String value=(mSharedPreference.getString("customerId", "Default_Value"));
final String customer_id = value.trim();
final String username = editname.getText().toString().trim();
final String house = houseNo.getText().toString().trim();
final String local_area = autoCompView.getText().toString().trim();
**Something wrong with this line**
**final String service = spin.getSelectedItem().toString().trim();**
final String mobile_no = mobile.getText().toString().trim();
final String email_id = email.getText().toString().trim();
final String prob = problem.getText().toString().trim();
Toast.makeText(Form.this, username.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Form.this, service.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Form.this, local_area.toString(), Toast.LENGTH_LONG).show();
StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
hidePDialog();
try {
//String result="";
//Do it with this it will work
JSONArray jsonarray = new JSONArray(response);
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject person = jsonarray.getJSONObject(i);
String excep = person.getString("Exception");
String message1 = person.getString("Message");
String job = person.getString("JobNo");
if (excep.equalsIgnoreCase("True")) {
Toast.makeText(Form.this, excep, Toast.LENGTH_LONG)
.show();
} else {
Toast.makeText(Form.this, excep, Toast.LENGTH_LONG)
.show();
editname.setText("");
// if email and mb is valid than login
Intent i1 = new Intent(Form.this, Suceessful.class);
i1.putExtra("job_id", job);
startActivity(i1);
finish();
Toast.makeText(Form.this, excep.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Form.this, message1.toString(), Toast.LENGTH_LONG).show();
Toast.makeText(Form.this, job.toString(), Toast.LENGTH_LONG).show();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(Form.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(CUSTOMERID,customer_id);
params.put(USERNAME, username);
params.put(HOUSENO, house);
params.put(LOCALITY, local_area);
params.put(SERVICE, service);
params.put(MOBILE, mobile_no);
params.put(EMAIL, email_id);
params.put(PROBLEM, prob);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
adapter.notifyDataSetChanged();
}
protected Void doInBackground(Void... params) {
InputStream is = null;
String result = "";
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://url/Service.asmx/GetServiceList");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// Get our response as a String.
is = entity.getContent();
} catch (IOException e) {
e.printStackTrace();
}
//convert response to string
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"));
String line = null;
while ((line = reader.readLine()) != null) {
result += line;
}
is.close();
//result=sb.toString();
} catch (Exception e) {
e.printStackTrace();
}
// parse json data
try {
JSONArray jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
JSONObject obj = jArray.getJSONObject(i);
Item customer = new Item();
customer.setiD(obj.getString("ServiceId"));
customer.setsText(obj.getString("ServiceName"));
// adding movie to movies array
customerList.add(customer);
}
} catch (JSONException e) {
e.printStackTrace();
}
// adapter.notifyDataSetChanged();
return null;
}
protected void onPostExecute(Void result) {
customerList.addAll(items);
adapter.notifyDataSetChanged();
}
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
// Inflate menu to add items to action bar if it is present.
inflater.inflate(R.menu.main, menu);
MenuItem item = menu.findItem(R.id.refresh);
item.setVisible(false);
return true;
}
}

There are several ways to achieve this. I think the simplest way is to create a model class for your spinner item.
public class Item implements Serializable {
public String sText;
public int iD;
public int getiD() {
return iD;
}
public void setiD(int iD) {
this.iD = iD;
}
public Item(String sText, int iD) {
this.sText = sText;
this.iD=iD;
}
public String getsText() {
return sText;
}
public void setsText(String sText) {
this.sText = sText;
}
#Override
public boolean equals(Object o) {
Item item = (Item) o;
if (item.getiD()==iD)
return true;
else
return false;
}
#Override
public String toString() {
return this.sText; // What to display in the Spinner list.
}
}
In the activity class you can create an ArrayAdapter.
private ArrayAdapter adapter;
private List<Item> items;
Inside onCreate initialize list and adapter and set the adapter.
items= new ArrayList<>();
adapter = new ArrayAdapter<Item>(getActivity(), android.R.layout.simple_spinner_item, items);
service_need.setAdapter(adapter);
Replace json parsing like this:
// parse json data
try {
JSONArray jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
JSONObject jsonObject = jArray.getJSONObject(i);
// add interviewee name to arraylist
items.add(new Item(jsonObject.getString("ServiceName"),jsonObject.getString("ServiceId")));
}
} catch (JSONException e) {
e.printStackTrace();
}
Then call adapter.notifyDataSetChanged() inside onPostExecute().
In the onClick, you can fetch the customer ID from the spinner.
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String customer_id=customerList.get(spinner_cat.getSelectedItemPosition()).getiD();

To hide the Id you must not add it to the array you are passing to spinner.
Use a structure to create objects with properties name and id.
private static class Items
{
public String name;
public String id;
}
You can add setters and getters methods.
Create a list of Items object. Set each object values for name and id from server.
Create an array of strings for spinner consisting of names of Items objects in order.
On selection event of spinner, get the id of Items object in the list from selected position and use it to send to server.

my llistview load multiple time same data on screen

my listview repeat data some time which click on buttons fastly what do i do please help me see this images http://imgur.com/ed5uDtp after some time is show like this http://imgur.com/jAt4yn7
is show correctly data on listview but some time when click fastly buttons is load duplicate data how i will fixed this? plaa help me
public class thirdstep extends Activity implements View.OnClickListener {
int count = 0;
String id;
String title;
String tmpString, finaldate;
String valll;
ProgressBar prgLoading;
TextView txtAlert;
int IOConnect = 0;
String mVal9;
Button e01;
Button e02;
Button e03;
Button e04;
Button e05;
String SelectMenuAPI;
String url;
String URL;
String URL2, URL3, URL4;
String menu_title;
JSONArray school;
ListView listCategory;
String status;
String School_ID;
String Menu_ID;
String School_name;
String Meal_groupid;
String _response;
String _response2;
String CategoryAPI;
String SelectMenuAPI2;
TextView menu_nametxt;
thirdstepAdapter cla;
static ArrayList<Long> Category_ID = new ArrayList<Long>();
static ArrayList<String> school_name = new ArrayList<String>();
static ArrayList<String> menu_name = new ArrayList<String>();
static ArrayList<String> dish_name = new ArrayList<String>();
static ArrayList<String> dish_ID = new ArrayList<String>();
static ArrayList<String> day = new ArrayList<String>();
static ArrayList<Long> Vacation_ID = new ArrayList<Long>();
static ArrayList<String> Vacation_name = new ArrayList<String>();
static ArrayList<String> Vacation_Date = new ArrayList<String>();
String mydate;
String mode;
String s2;
ArrayList<String> myList,myList2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.category_list2);
listCategory = (ListView) findViewById(R.id.thirdscreenlist);
prgLoading = (ProgressBar) findViewById(R.id.prgLoading);
txtAlert = (TextView) findViewById(R.id.txtAlert);
e01 = (Button) findViewById(R.id.e01);
e02 = (Button) findViewById(R.id.e02);
e03 = (Button) findViewById(R.id.e03);
e04 = (Button) findViewById(R.id.e04);
e05 = (Button) findViewById(R.id.e05);
e01.setOnClickListener(this);
e02.setOnClickListener(this);
e03.setOnClickListener(this);
e04.setOnClickListener(this);
e05.setOnClickListener(this);
cla = new thirdstepAdapter(thirdstep.this);
listCategory.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
// TODO Auto-generated method stub
Intent intent = new Intent(thirdstep.this, fifthscreen.class);
startActivity(intent);
}
});
new getDataTask().execute();
}
void clearData() {
Category_ID.clear();
school_name.clear();
menu_name.clear();
dish_name.clear();
dish_ID.clear();
day.clear();
Vacation_ID.clear();
Vacation_name.clear();
Vacation_Date.clear();
}
public class getDataTask extends AsyncTask<Void, Void, Void> {
getDataTask() {
if (!prgLoading.isShown()) {
prgLoading.setVisibility(0);
txtAlert.setVisibility(8);
}
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
}
#Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
parseJSONData();
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
prgLoading.setVisibility(8);
if ((Category_ID.size() > 0) || IOConnect == 0) {
listCategory.setAdapter(cla);
cla.notifyDataSetChanged() ;
listCategory.invalidateViews();
} else {
txtAlert.setVisibility(0);
menu_nametxt.setText("");
listCategory.setVisibility(View.GONE);
}
}
}
public void parseJSONData() {
clearData();
SelectMenuAPI="";
SelectMenuAPI = Utils.Schoolmenu +Menu_ID+"&sid="+School_ID+"&lid=" +
SchoolLevelId+"&mealid="+Meal_groupid;
URL = SelectMenuAPI;
URL2 = URL.replace(" ", "%20");
try {
Log.i("url",""+URL2);
HttpClient client = new DefaultHttpClient();
HttpConnectionParams
.setConnectionTimeout(client.getParams(), 15000);
HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
HttpUriRequest request = new HttpGet(URL2);
HttpResponse response = client.execute(request);
HttpEntity resEntity = response.getEntity();
_response=EntityUtils.toString(resEntity);
JSONObject json5 = new JSONObject(_response);
status = json5.getString("status");
if (status.equals("1")) {
JSONArray school5 = json5.getJSONArray("data");
}
}
else {
}
SelectMenuAPI2="";
SelectMenuAPI2 = Utils.SchoolVacation+mVal9;
// clearData();
URL3 = SelectMenuAPI2;
URL4 = URL3.replace(" ", "%20");
Log.i("url",""+URL4);
JSONObject json2 = new JSONObject(_response);
status = json2.getString("status");
if (status.equals("1")) {
if (Vacation_Date.contains(mydate)) {
message = "holiday";
JSONObject json4 = new JSONObject(str2);
status = json4.getString("status");
if (status.equals("1")) {
school = json4.getJSONArray("data");
for (int k = 0; k < school.length(); k++) {
JSONObject jb = (JSONObject) school .getJSONObject(k);
Vacation_ID.add((long) k);
String[] mVal = new String[school.length()];
if(school.getJSONObject(k).getString("date").equals(mydate))
{
mVal[k] = school.getJSONObject(k).getString("title");
mVal3 = mVal[k];
}
}
}
} else {
JSONArray school = json2.getJSONArray("data");
for (int i = 0; i < school.length(); i++) {
JSONObject object = school.getJSONObject(i);
if (object.getString("Schedule").equals("weekly")) {
if (object.getString("day").equals(Todayday)) {
Category_ID.add((long) i);
school_name
.add(object.getString("school_name"));
dish_ID.add(object.getString("dish_id"));
dish_name.add(object.getString("dish_name"));
menu_name.add(object.getString("menu_title"));
day.add(object.getString("day"));
count = count + 1;
String[] mVal = new String[school.length()];
for (int k = 0; k < school.length(); k++) {
mVal[k] = school.getJSONObject(k).getString("menu_title");
message = "weekly";
mVal2 = mVal[0];
}
}
if(dish_name != null &&
!dish_name.isEmpty())
{
message = "weekly";
}
else {
message = "error";
}
}
else {
message = "error";
}
}
}
}
else {
message = "error";
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
IOConnect = 1;
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.e01:
// do stuff;
listCategory.setVisibility(View.GONE);
new getDataTask().execute();
break;
case R.id.e02:
// do stuff;
listCategory.setVisibility(View.GONE);
new getDataTask().execute();
break;
case R.id.e03:
// do stuff;
listCategory.setVisibility(View.GONE);
new getDataTask().execute();
break;
case R.id.e04:
// do stuff;
listCategory.setVisibility(View.GONE);
new getDataTask().execute();
break;
case R.id.e05:
listCategory.setVisibility(View.GONE);
// do stuff;
new getDataTask().execute();
break;
}
}
}

You are calling asynctask twice and that is making all parts twice, I mean you are cleaning twice before filling and fill arrays twice. You should control your async task for do not execute before last one finished.
1-Create a boolean value
2-Put condition on onClicks:
if(yourBoolean){
new getDataTask().execute();}
3- in your asyncTask's onPreExecute make yourBoolean=false and onPostExecute make yourBoolean=true again.

Try this..
Just remove the below line and try it..
listCategory.invalidateViews();
because
ListView.invalidateViews() is used to tell the ListView to invalidate all its child item views (redraw them). Note that there not need to be an equal number of views than items. That's because a ListView recycles its item views and moves them around the screen in a smart way while you scroll.

how to parsing with json from 2 different server?

i need help here.
i wanna do parse with json from 2 url server and then show the array at 1 listview.
this's my code.
public class MainActivity extends Activity {
private JSONObject jObject;
private String jsonResult ="";
private JSONObject jObject2;
private String jsonResult2 ="";
private String url = "http://10.0.2.2/kota/daftarkota.php";
private String url2 = "http://10.0.2.2/kota/delkota.php";
private String url3 = "http://www.hatsa.byethost33.com/kota_daftarkota.php";
String[] daftarid;
String[] daftarnama;
String[] daftarlatitude;
String[] daftarlongitude;
Menu menu;
public static MainActivity ma;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ma=this;
RefreshList();
}
public void RefreshList() {
try {
jsonResult = getRequest(url);
jObject = new JSONObject(jsonResult);
JSONArray menuitemArray = jObject.getJSONArray("kota");
daftarid = new String[menuitemArray.length()];
daftarnama = new String[menuitemArray.length()];
daftarlatitude = new String[menuitemArray.length()];
daftarlongitude = new String[menuitemArray.length()];
for (int i = 0; i < menuitemArray.length(); i++)
{
daftarid[i] = menuitemArray.getJSONObject(i).getString("id").toString();
daftarnama[i] = menuitemArray.getJSONObject(i).getString("nama").toString();
daftarlatitude[i] = menuitemArray.getJSONObject(i).getString("latitude").toString();
daftarlongitude[i] = menuitemArray.getJSONObject(i).getString("longitude").toString();
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
jsonResult2 = getRequest(url3);
jObject2 = new JSONObject(jsonResult2);
JSONArray menuitemArray = jObject2.getJSONArray("kota");
daftarid = new String[menuitemArray.length()];
daftarnama = new String[menuitemArray.length()];
daftarlatitude = new String[menuitemArray.length()];
daftarlongitude = new String[menuitemArray.length()];
for (int i = 0; i < menuitemArray.length(); i++)
{
daftarid[i] = menuitemArray.getJSONObject(i).getString("id").toString();
daftarnama[i] = menuitemArray.getJSONObject(i).getString("nama").toString();
daftarlatitude[i] = menuitemArray.getJSONObject(i).getString("latitude").toString();
daftarlongitude[i] = menuitemArray.getJSONObject(i).getString("longitude").toString();
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ListView ListView01 = (ListView)findViewById(R.id.ListView01);
ListView01.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, daftarnama));
ListView01.setSelected(true);
ListView01.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
final String selectionid = daftarid[arg2];
final String selectionnama = daftarnama[arg2];
final String selectionlatitude = daftarlatitude[arg2];
final String selectionlongitude = daftarlongitude[arg2];
final CharSequence[] dialogitem = {"Edit", "Delete"};
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Pilih ?");
builder.setItems(dialogitem, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
switch(item){
case 0 :
Intent i = new Intent(getApplicationContext(), EditActivity.class);
i.putExtra("id", selectionid);
i.putExtra("nama", selectionnama);
i.putExtra("latitude", selectionlatitude);
i.putExtra("longitude", selectionlongitude);
startActivity(i);
break;
case 1 :
getRequest(url2 + "?id=" + selectionid);
RefreshList();
break;
}
}
});
builder.create().show();
}});
((ArrayAdapter)ListView01.getAdapter()).notifyDataSetInvalidated();
}
/**
* Method untuk Mengirimkan data ke server
*/
public String getRequest(String Url){
String sret="";
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(Url);
try{
HttpResponse response = client.execute(request);
sret =request(response);
}catch(Exception ex){
Toast.makeText(this,"Gagal "+sret, Toast.LENGTH_SHORT).show();
}
return sret;
}
/**
* Method untuk Menerima data dari server
*/
public static String request(HttpResponse response){
String result = "";
try{
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null){
str.append(line + "\n");
}
in.close();
result = str.toString();
}catch(Exception ex){
result = "Error";
}
return result;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
this.menu = menu;
menu.add(0, 1, 0, "Tambah").setIcon(android.R.drawable.btn_plus);
menu.add(0, 2, 0, "Refresh").setIcon(android.R.drawable.ic_menu_rotate);
menu.add(0, 3, 0, "Exit").setIcon(android.R.drawable.ic_menu_close_clear_cancel);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 1:
Intent i = new Intent(MainActivity.this, AddActivity.class);
startActivity(i);
return true;
case 2:
RefreshList();
return true;
case 3:
finish();
return true;
}
return false;
}
}
if i run it, the listview only show me the array from 'url' and there's nothing from 'url3'.
i don't know how should my code is, if i wanna make the listview show the array from 'url' and 'url3'.
thanks. :)

It actually looks the other way around. I guess you see the data from url3, since you create the array daftarnama twice - the second time with the data from url3. Use a List<String> instead of the array. Create the list just once and then add all the items from both urls. Also, you should rethink your code. You have a lot of duplicate code here (DRY - don't repeat yourself).

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