Sorry for my bad english.I am new to android and i parsed json data into listview,now i want to put on him a search functionality,but i have a problem,when i entered a words in edittext,then in the listview my items are duplicated,and items has been increases,look my code and screen shots.Thanks in advance and any help will be much appreciated.
My Artist Activity:
public class Artists extends Activity {
// Connection detector
ConnectionDetector cd;
// Alert dialog manager
AlertDialogManager alert = new AlertDialogManager();
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
// This is not using now if you want you can remove its all references :)
ArrayList<HashMap<String, String>> albumsList;
ArrayList<AdapterDTOArtist> mAdapterDTOs = null;
private LazyAdapterArtist mLazyAdatper = null;
private ArrayList<String> array_sort = new ArrayList<String>();
int textlength = 0;
// albums JSONArray
JSONArray albums = null;
LinearLayout ll_artists_chart;
LinearLayout ll_artists_newrelease;
private EditText etSearch;
private static String URL_ALBUMS = "http://triplevmusic.com/dev/webservice/index.php?op=fetch_artists.json";
// JSON Node names
private static final String TAG_CONTACTS = "data";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private ListView lv = null;
EditText et_artists_searchWord;
// contacts JSONArray
JSONArray contacts = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.artists);
lv = (ListView) findViewById(R.id.artist_main_list_id);
cd = new ConnectionDetector(getApplicationContext());
// Check for internet connection
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(Artists.this,
"Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Hashmap for ListView
albumsList = new ArrayList<HashMap<String, String>>();
mAdapterDTOs = new ArrayList<AdapterDTOArtist>();
// Loading Albums JSON in Background Thread
new LoadAlbums().execute();
// get listview
/**
* Listview item click listener TrackListActivity will be lauched by
* passing album id
* */
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int arg2,
long arg3) {
// on selecting a single album
}
});
ll_artists_chart = (LinearLayout) findViewById(R.id.ll_artists_chart);
ll_artists_newrelease = (LinearLayout) findViewById(R.id.ll_artists_newrelease);
et_artists_searchWord = (EditText) findViewById(R.id.et_artists_searchWord);
et_artists_searchWord.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
// ((Filterable) Artists.this.mAdapterDTOs).getFilter().filter(s);
List<AdapterDTOArtist> list = filter(s.toString(),mAdapterDTOs, true);
mAdapterDTOs.addAll(list);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
ll_artists_chart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(getBaseContext(), ChartActivity.class);
startActivity(intent);
// finish();
}
});
ll_artists_newrelease.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(getBaseContext(), NewReleases.class);
startActivity(intent);
//finish();
}
});
}
/**
* Background Async Task to Load all Albums by making http request
* */
class LoadAlbums extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Artists.this);
pDialog.setMessage("Listing Artists ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Albums JSON
* */
protected String doInBackground(String... args) {
// Building Parameters
//List<NameValuePair> params = new ArrayList<NameValuePair>();
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
JSONObject json = jParser.getJSONFromUrl(URL_ALBUMS);
// getting JSON string from URL
//String json = jsonParser.makeHttpRequest(URL_ALBUMS, "GET", params);
// Check your log cat for JSON reponse
Log.i("Albums JSON: ", "> " + json);
try {
//albums = new JSONArray(json);
albums = json.getJSONArray(TAG_CONTACTS);
if (albums != null) {
// looping through All albums
for (int i = 0; i < albums.length(); i++) {
JSONObject c = albums.getJSONObject(i);
// Storing each json item values in variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
/*String EateryThmbnailUrl = c
.getString(TAG_THMBNAIL_URL);*/
// ~\/Uploads\/EateryImages\/\/7\/41283f1f-8e6f-42d4-b3c1-01f990efb428.gif
/*EateryThmbnailUrl = HOST_URL
+ EateryThmbnailUrl.replace("~", "");*/
AdapterDTOArtist adapterDTO = new AdapterDTOArtist();
adapterDTO.setmTag_Id(id);
adapterDTO.setmTag_Name(name);
// adapterDTO.setmImage_URL(EateryThmbnailUrl);
mAdapterDTOs.add(adapterDTO);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
HashMap<String, Integer> map1 = new HashMap<String, Integer>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_NAME, name);
// adding HashList to ArrayList
albumsList.add(map);
}
} else {
Log.d("Albums: ", "null");
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all albums
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
// updating listview
mLazyAdatper = new LazyAdapterArtist(Artists.this,
mAdapterDTOs);
lv.setAdapter(mLazyAdatper);
// mLazyAdatper.setDataSet(mAdapterDTOs);
}
});
}
}
public static List<AdapterDTOArtist> filter(String string,
Iterable<AdapterDTOArtist> iterable, boolean byName) {
if (iterable == null)
return new LinkedList<AdapterDTOArtist>();
else {
List<AdapterDTOArtist> collected = new LinkedList<AdapterDTOArtist>();
Iterator<AdapterDTOArtist> iterator = iterable.iterator();
if (iterator == null)
return collected;
while (iterator.hasNext()) {
AdapterDTOArtist item = iterator.next();
collected.add(item);
}
return collected;
}
}
}
My AdapterDTOArtist class :
public class AdapterDTOArtist {
private String mTag_Id;
private String mTag_Name;
public String getmTag_Name() {
return mTag_Name;
}
public void setmTag_Name(String mTag_Name) {
this.mTag_Name = mTag_Name;
}
public String getmTag_Id() {
return mTag_Id;
}
public void setmTag_Id(String mTag_Id) {
this.mTag_Id = mTag_Id;
}
}
My LazyAdapterArtist class:
public class LazyAdapterArtist extends BaseAdapter {
private Context mContext = null;
private ArrayList<AdapterDTOArtist> mAdapterDTOs = null;
public LazyAdapterArtist(Context context,
ArrayList<AdapterDTOArtist> mAdapterDTOs2) {
// TODO Auto-generated constructor stub
this.mContext = context;
this.mAdapterDTOs = mAdapterDTOs2;
}
public void setDataSet(ArrayList<AdapterDTOArtist> adapterDTOs) {
this.mAdapterDTOs = adapterDTOs;
notifyDataSetChanged();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mAdapterDTOs.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View row = convertView;
ViewHolder mHolder = new ViewHolder();
if (row == null) {
// Cell is inflating for first time
row = LayoutInflater.from(mContext)
.inflate(com.whizpool.triplevmusic.R.layout.row_artists,
null, false);
mHolder.mNameTxt = (TextView) row
.findViewById(com.whizpool.triplevmusic.R.id.tv_row_artists);
row.setTag(mHolder);
} else {
// recycling of cells
mHolder = (ViewHolder) row.getTag();
}
mHolder.mNameTxt.setText(mAdapterDTOs.get(position).getmTag_Name());
return row;
}
static class ViewHolder {
TextView mNameTxt = null;
}
}
when parsed json data into listview my app look like this:
when enter word in edittext field then my app look like this:
I just want,when i entered the word for example i enter "D" then in a listview only those words were display which have starting word is "D".Thanks Alot and again sorry for my english.
