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Je suis aux prises avec ce problème depuis un moment maintenant. Je construis une liste filtrable avec edittext. La liste s'est bien remplie initialement MAIS une fois que je tape quelque chose dans le champ edittext. La liste entière est partie et ne renvoie aucun résultat. Ce qui suit sont mes codes.Custom Listadapter Filtrable aucun résultat
Note: Mes codes sont principalement basés sur post de sacoskun.
ThreedListViewActivity.java
public class ThreedListViewActivity extends ActionBarActivity
{
// All static variables
static final String URL = "http://api.androidhive.info/music/music.xml";
// XML node keys
static final String KEY_SONG = "song"; // parent node
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_ARTIST = "artist";
static final String KEY_DURATION = "duration";
static final String KEY_THUMB_URL = "thumb_url";
ListView list;
ThreedListAdapterFilterable adapter;
ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
EditText filterText = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.threed_listview);
setTitle(R.string.view_3d);
list=(ListView)findViewById(R.id.list);
adapter = new ThreedListAdapterFilterable(this, songsList);
new MyAsyncTask().execute();
filterText = (EditText) findViewById(R.id.search_box);
filterText.addTextChangedListener(filterTextWatcher);
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
}
});
}
private TextWatcher filterTextWatcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
adapter.getFilter().filter(s.toString());
}
};
public class MyAsyncTask extends AsyncTask<Void,Void,Void>{
private final ProgressDialog dialog=new ProgressDialog(ThreedListViewActivity.this);
@Override
protected Void doInBackground(Void... params) {
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML from URL
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_SONG);
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_ID, parser.getValue(e, KEY_ID));
map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
map.put(KEY_ARTIST, parser.getValue(e, KEY_ARTIST));
map.put(KEY_DURATION, parser.getValue(e, KEY_DURATION));
map.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL));
// adding HashList to ArrayList
songsList.add(map);
}
return null;
}
@Override
protected void onPreExecute()
{
dialog.setMessage("Loading ...");
dialog.show();
dialog.setCancelable(false);
}
@Override
protected void onPostExecute(Void result)
{
if(dialog.isShowing() == true)
{
dialog.dismiss();
}
// Getting adapter by passing xml data ArrayList
list.setAdapter(adapter);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.action_items, menu);
return true;
}
}
ThreedListAdapterFilterable.java
public class ThreedListAdapterFilterable extends BaseAdapter implements Filterable {
private Activity activity;
ArrayList<HashMap<String, String>> mDataShown;
ArrayList<HashMap<String, String>> mAllData;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
public ThreedListAdapterFilterable(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
mDataShown= (ArrayList<HashMap<String, String>>) d;
mAllData = (ArrayList<HashMap<String, String>>) mDataShown.clone();
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public int getCount() {
return mDataShown.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.threed_listrow, null);
TextView title = (TextView)vi.findViewById(R.id.title); // title
TextView artist = (TextView)vi.findViewById(R.id.artist); // artist name
TextView duration = (TextView)vi.findViewById(R.id.duration); // duration
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image
HashMap<String, String> song = new HashMap<String, String>();
song = mDataShown.get(position);
// Setting all values in listview
title.setText(song.get(ThreedListViewActivity.KEY_TITLE));
artist.setText(song.get(ThreedListViewActivity.KEY_ARTIST));
duration.setText(song.get(ThreedListViewActivity.KEY_DURATION));
imageLoader.DisplayImage(song.get(ThreedListViewActivity.KEY_THUMB_URL), thumb_image);
return vi;
}
public Filter getFilter() {
Filter nameFilter = new Filter() {
@SuppressWarnings("unchecked")
@Override
public String convertResultToString(Object resultValue) {
return ((HashMap<String, String>)(resultValue)).get(ThreedListViewActivity.KEY_TITLE);
}
@Override
protected FilterResults performFiltering(CharSequence s) {
if(s != null)
{
ArrayList<HashMap<String, String>> tmpAllData = mAllData;
ArrayList<HashMap<String, String>> tmpDataShown = mDataShown;
tmpDataShown.clear();
for(int i = 0; i < tmpAllData.size(); i++)
{
if(tmpAllData.get(i).get(ThreedListViewActivity.KEY_TITLE).toLowerCase().startsWith(s.toString().toLowerCase()))
{
tmpDataShown.add(tmpAllData.get(i));
}
}
FilterResults filterResults = new FilterResults();
filterResults.values = tmpDataShown;
filterResults.count = tmpDataShown.size();
return filterResults;
}
else
{
return new FilterResults();
}
}
@Override
protected void publishResults(CharSequence s,
FilterResults results) {
if(results != null && results.count > 0)
{
notifyDataSetChanged();
}
}};
return nameFilter;
}
}
EDIT: C'est un adaptateur mis à jour qui filtre ma liste. MAIS, il ne met pas à jour ma liste lorsque j'efface le texte dans le texte d'entrée.
public class ProjectListAdapter extends BaseAdapter implements Filterable{
private Activity activity;
ArrayList<HashMap<String, String>> mDataShown;
ArrayList<HashMap<String, String>> mAllData;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
HashMap<String, String> song = new HashMap<String, String>();
ArrayList<HashMap<String, String>> filteredItems;
public ProjectListAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
mDataShown= (ArrayList<HashMap<String, String>>) d;
mAllData = (ArrayList<HashMap<String, String>>) mDataShown.clone();
filteredItems = mDataShown;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mDataShown.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi;
if(convertView==null){
vi=new View(activity);
vi = inflater.inflate(R.layout.recents_listrow, null);
}else{
vi = (View)convertView;
}
TextView title = (TextView)vi.findViewById(R.id.title); // title
TextView artist = (TextView)vi.findViewById(R.id.company); // artist name
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image
title.setText(filteredItems.get(position).get(RecentsFragment.KEY_TITLE));
artist.setText(filteredItems.get(position).get(RecentsFragment.KEY_COMPANY));
imageLoader.DisplayImage(filteredItems.get(position).get(RecentsFragment.KEY_THUMB_URL), thumb_image);
return vi;
}
public Filter getFilter() {
Filter nameFilter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
if(constraint != null && constraint.toString().length() > 0) {
constraint = constraint.toString().toUpperCase();
ArrayList<HashMap<String, String>> filt = mDataShown;
ArrayList<HashMap<String, String>> tmpItems = mAllData;
filt.clear();
for(int i = 0; i < tmpItems.size(); i++) {
if(tmpItems.get(i).get(RecentsFragment.KEY_TITLE).toLowerCase().startsWith(constraint.toString().toLowerCase()))
{
filt.add(tmpItems.get(i));
}
}
FilterResults filterResults = new FilterResults();
filterResults.count = filt.size();
filterResults.values = filt;
return filterResults;
}else{
return new FilterResults();
}
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
mDataShown = (ArrayList<HashMap<String, String>>)results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};
return nameFilter;
}
}
Le fragment de liste je suis en train de mettre en œuvre: RecentsFragment
public class RecentsFragment extends ListFragment {
// All static variables
static final String URL = "http://www.sundancepost.com/ivue/projects.xml";
// XML node keys
static final String KEY_PROJECT = "project"; // parent node
static final String KEY_TITLE = "title";
static final String KEY_COMPANY = "company";
static final String KEY_THUMB_URL = "thumb_url";
int mCurCheckPosition = 0;
ListView list;
ProjectListAdapter adapter;
ArrayList<HashMap<String, String>> projectsList = new ArrayList<HashMap<String, String>>();
EditText filterText = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.recents_list, container, false);
list = (ListView)view.findViewById(android.R.id.list);
filterText = (EditText)view.findViewById(R.id.filter_box);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if(null == savedInstanceState){
ConnectivityManager cMgr = (ConnectivityManager)getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
if (cMgr.getActiveNetworkInfo() != null && cMgr.getActiveNetworkInfo().isConnectedOrConnecting()) {
new MyAsyncTask().execute();
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Please check your internet connection");
builder.setTitle("Failed to download resources");
builder.setCancelable(false);
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
return;
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
adapter = new ProjectListAdapter(getActivity(), projectsList);
list.requestFocus();
list.setTextFilterEnabled(true);
filterText.addTextChangedListener(filterTextWatcher);
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(getActivity(), DetailsActivity.class);
intent.putExtra("title",projectsList.get(position).get(KEY_TITLE));
intent.putExtra("company", projectsList.get(position).get(KEY_COMPANY));
startActivity(intent);
}
});
}
@Override
public void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
outState.putInt("workaround", mCurCheckPosition);
}
private TextWatcher filterTextWatcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
adapter.getFilter().filter(s);
}
};
@Override
public void onDestroy() {
super.onDestroy();
filterText.removeTextChangedListener(filterTextWatcher);
}
public class MyAsyncTask extends AsyncTask<Void,Void,Void>{
private final ProgressDialog recents_dialog = new ProgressDialog(getActivity());
@Override
protected Void doInBackground(Void... params) {
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML from URL
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_PROJECT);
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
map.put(KEY_COMPANY, parser.getValue(e, KEY_COMPANY));
map.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL));
// adding HashList to ArrayList
projectsList.add(map);
}
return null;
}
@Override
protected void onPreExecute()
{
projectsList.clear();
recents_dialog.setMessage("Loading ...");
recents_dialog.show();
recents_dialog.setCancelable(false);
}
@Override
protected void onPostExecute(Void result)
{
if(recents_dialog.isShowing() == true)
{
recents_dialog.dismiss();
}
// Getting adapter by passing xml data ArrayList
list.setAdapter(adapter);
}
}
}
Utilisez le débogueur. Mettez des points d'arrêt dans votre adaptateur. Le filtre renvoie-t-il réellement des résultats? PublishResults est-il jamais appelé? –
Je pense que les résultats publiés ne sont pas passés dans la fonction getView. Donc, la liste n'est pas mise à jour.Merci pour le rappel, @ChristopherPerry –