List Filter Custom Adapter no da resultado

Estoy desarrollando una aplicación donde hay una lista y texto de edición superior, el momento en que escribiré algo en editText debería obtener la coincidencia de resultados para la palabra escrita. No puedo obtener el resultado, por ejemplo, ¿dónde estoy cometiendo un error? A continuación están mi Actividad y Adaptador.

** Actividad * *

public class ListFilterActivity extends ListActivity{ ListView list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.list_filter); list = getListView(); list.isTextFilterEnabled(); // final ArrayAdapter adapter = new ArrayAdapter(this, // android.R.layout.simple_list_item_1, android.R.id.text1, // getModel()); final CustomAdapter adapter = new CustomAdapter(ListFilterActivity.this, getModel()); setListAdapter(adapter); EditText filterEditText = (EditText) findViewById(R.id.filterText); filterEditText.addTextChangedListener(new TextWatcher() { public void onTextChanged(CharSequence s, int start, int before, int count) { adapter.getFilter().filter(s.toString()); } public void beforeTextChanged(CharSequence s, int start, int count, int after) { } public void afterTextChanged(Editable s) { } }); } private ArrayList getModel() { ArrayList list = new ArrayList(); list.add("Linux"); list.add("Windows7"); list.add("Suse"); list.add("Eclipse"); list.add("Ubuntu"); list.add("Solaris"); list.add("Android"); list.add("Ayes"); list.add("iPhone"); return list; } } 

Adaptador ***

  public class CustomAdapter extends ArrayAdapter { private final Context context; private final ArrayList names; private LayoutInflater mInflater; private TextView txt; public CustomAdapter(Context context, ArrayList names) { super(context, R.layout.row, names); this.context = context; this.names = names; mInflater = LayoutInflater.from(context); } public Filter getFilter() { if(newFilter == null) { newFilter = new Filter() { @Override protected void publishResults(CharSequence constraint, FilterResults results) { // TODO Auto-generated method stub Log.d("TAG", "publishResults"); notifyDataSetChanged(); } @Override protected FilterResults performFiltering(CharSequence prefix) { FilterResults results = new FilterResults(); ArrayList i = new ArrayList(); if (prefix!= null && prefix.toString().length() > 0) { for (int index = 0; index < names.size(); index++) { String si = names.get(index); if(si.compareTo(prefix.toString()) == 0){ i.add(si); } } results.values = i; results.count = i.size(); } else{ synchronized (names){ results.values = names; results.count = names.size(); } } return results; } }; } // Log.d("TAG", "end getFilter"); return newFilter; } @Override public String getItem(int position) { return super.getItem(position); } @Override public int getCount() { return super.getCount(); } @Override public View getView(int position, View convertView, ViewGroup parent) { View rowView = convertView; if(rowView == null) { rowView = mInflater.inflate(R.layout.row, null); txt = (TextView)rowView.findViewById(R.id.text1); } else { rowView.getTag(); } txt.setText(names.get(position)); return rowView; } } 

por favor ayúdenme …

getFilter() implementar Filterable en su Clase de adaptador y Anular getFilter()

Consulte este ejemplo completo para Filtrar adaptadores personalizados.

ACTUALIZAR:

  public class ListFilterActivity extends ListActivity { private List list = new ArrayList(); List mOriginalValues; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final MyAdapter adapter = new MyAdapter(this, getModel()); setListAdapter(adapter); EditText filterEditText = (EditText) findViewById(R.id.filterText); // Add Text Change Listener to EditText filterEditText.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { // Call back the Adapter with current character to Filter adapter.getFilter().filter(s.toString()); } @Override public void beforeTextChanged(CharSequence s, int start, int count,int after) { } @Override public void afterTextChanged(Editable s) { } }); } private List getModel() { list.add("Linux"); list.add("Windows7"); list.add("Suse"); list.add("Eclipse"); list.add("Ubuntu"); list.add("Solaris"); list.add("Android"); list.add("iPhone"); list.add("Windows XP"); return list; } // Adapter Class public class MyAdapter extends BaseAdapter implements Filterable { List arrayList; List mOriginalValues; // Original Values LayoutInflater inflater; public MyAdapter(Context context, List arrayList) { this.arrayList = arrayList; inflater = LayoutInflater.from(context); } @Override public int getCount() { return arrayList.size(); } @Override public Object getItem(int position) { return arrayList.get(position); } @Override public long getItemId(int position) { return position; } private class ViewHolder { TextView textView; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) { holder = new ViewHolder(); convertView = inflater.inflate(R.layout.row, null); holder.textView = (TextView) convertView .findViewById(R.id.textview); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.textView.setText(arrayList.get(position)); return convertView; } @Override public Filter getFilter() { Filter filter = new Filter() { @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint,FilterResults results) { arrayList = (List) results.values; // has the filtered values notifyDataSetChanged(); // notifies the data with new filtered values } @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values List FilteredArrList = new ArrayList(); if (mOriginalValues == null) { mOriginalValues = new ArrayList(arrayList); // saves the original data in mOriginalValues } /******** * * If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values * else does the Filtering and returns FilteredArrList(Filtered) * ********/ if (constraint == null || constraint.length() == 0) { // set the Original result to return results.count = mOriginalValues.size(); results.values = mOriginalValues; } else { constraint = constraint.toString().toLowerCase(); for (int i = 0; i < mOriginalValues.size(); i++) { String data = mOriginalValues.get(i); if (data.toLowerCase().contains(constraint.toString())) { FilteredArrList.add(data); } } // set the Filtered result to return results.count = FilteredArrList.size(); results.values = FilteredArrList; } return results; } }; return filter; } } } 

getFilter() anular getFilter() en su adaptador personalizado.

Si bien la solución de Lalit funciona a la perfección, puede implementar el SearchView en ActionBar que hace que su UI sea más elegante. Puede obtener SearchView en su actividad como se menciona a continuación –

 @Override public boolean onCreateOptionsMenu(Menu menu) { //Create the search view SearchView searchView = new SearchView(getSupportActionBar().getThemedContext()); mListView = getListView(); mListView.setTextFilterEnabled(true); setupSearchView(searchView); menu.add(0, 1, 1, "Search Text") .setIcon(R.drawable.ic_search) .setActionView(searchView) .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW); return super.onCreateOptionsMenu(menu); } private void setupSearchView(SearchView mSearchView) { mSearchView.setIconifiedByDefault(false); mSearchView.setSubmitButtonEnabled(false); mSearchView.setOnQueryTextListener(this); mSearchView.setQueryHint("Search Text"); } @Override public boolean onQueryTextChange(String newText) { if (TextUtils.isEmpty(newText)) { mListView.clearTextFilter(); } else { mListView.setFilterText(newText); } return true; } @Override public boolean onQueryTextSubmit(String query) { return false; } 
 /* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.app; import android.content.Context; import android.content.Intent; import android.content.pm.ComponentInfo; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PaintFlagsDrawFilter; import android.graphics.PixelFormat; import android.graphics.Rect; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.graphics.drawable.PaintDrawable; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.ListView; import android.widget.TextView; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * Displays a list of all activities which can be performed * for a given intent. Launches when clicked. * */ public abstract class LauncherActivity extends ListActivity { Intent mIntent; PackageManager mPackageManager; IconResizer mIconResizer; /** * An item in the list */ public static class ListItem { public ResolveInfo resolveInfo; public CharSequence label; public Drawable icon; public String packageName; public String className; public Bundle extras; ListItem(PackageManager pm, ResolveInfo resolveInfo, IconResizer resizer) { this.resolveInfo = resolveInfo; label = resolveInfo.loadLabel(pm); ComponentInfo ci = resolveInfo.activityInfo; if (ci == null) ci = resolveInfo.serviceInfo; if (label == null && ci != null) { label = resolveInfo.activityInfo.name; } if (resizer != null) { icon = resizer.createIconThumbnail(resolveInfo.loadIcon(pm)); } packageName = ci.applicationInfo.packageName; className = ci.name; } public ListItem() { } } /** * Adapter which shows the set of activities that can be performed for a given intent. */ private class ActivityAdapter extends BaseAdapter implements Filterable { private final Object lock = new Object(); private ArrayList mOriginalValues; protected final IconResizer mIconResizer; protected final LayoutInflater mInflater; protected List mActivitiesList; private Filter mFilter; public ActivityAdapter(IconResizer resizer) { mIconResizer = resizer; mInflater = (LayoutInflater) LauncherActivity.this.getSystemService( Context.LAYOUT_INFLATER_SERVICE); mActivitiesList = makeListItems(); } public Intent intentForPosition(int position) { if (mActivitiesList == null) { return null; } Intent intent = new Intent(mIntent); ListItem item = mActivitiesList.get(position); intent.setClassName(item.packageName, item.className); if (item.extras != null) { intent.putExtras(item.extras); } return intent; } public ListItem itemForPosition(int position) { if (mActivitiesList == null) { return null; } return mActivitiesList.get(position); } public int getCount() { return mActivitiesList != null ? mActivitiesList.size() : 0; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { View view; if (convertView == null) { view = mInflater.inflate( com.android.internal.R.layout.activity_list_item_2, parent, false); } else { view = convertView; } bindView(view, mActivitiesList.get(position)); return view; } private void bindView(View view, ListItem item) { TextView text = (TextView) view; text.setText(item.label); if (item.icon == null) { item.icon = mIconResizer.createIconThumbnail( item.resolveInfo.loadIcon(getPackageManager())); } text.setCompoundDrawablesWithIntrinsicBounds(item.icon, null, null, null); } public Filter getFilter() { if (mFilter == null) { mFilter = new ArrayFilter(); } return mFilter; } /** * An array filters constrains the content of the array adapter with a prefix. Each * item that does not start with the supplied prefix is removed from the list. */ private class ArrayFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence prefix) { FilterResults results = new FilterResults(); if (mOriginalValues == null) { synchronized (lock) { mOriginalValues = new ArrayList(mActivitiesList); } } if (prefix == null || prefix.length() == 0) { synchronized (lock) { ArrayList list = new ArrayList(mOriginalValues); results.values = list; results.count = list.size(); } } else { final String prefixString = prefix.toString().toLowerCase(); ArrayList values = mOriginalValues; int count = values.size(); ArrayList newValues = new ArrayList(count); for (int i = 0; i < count; i++) { ListItem item = values.get(i); String[] words = item.label.toString().toLowerCase().split(" "); int wordCount = words.length; for (int k = 0; k < wordCount; k++) { final String word = words[k]; if (word.startsWith(prefixString)) { newValues.add(item); break; } } } results.values = newValues; results.count = newValues.size(); } return results; } @Override protected void publishResults(CharSequence constraint, FilterResults results) { //noinspection unchecked mActivitiesList = (List) results.values; if (results.count > 0) { notifyDataSetChanged(); } else { notifyDataSetInvalidated(); } } } } /** * Utility class to resize icons to match default icon size. */ public class IconResizer { // Code is borrowed from com.android.launcher.Utilities. private int mIconWidth = -1; private int mIconHeight = -1; private final Rect mOldBounds = new Rect(); private Canvas mCanvas = new Canvas(); public IconResizer() { mCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG, Paint.FILTER_BITMAP_FLAG)); final Resources resources = LauncherActivity.this.getResources(); mIconWidth = mIconHeight = (int) resources.getDimension( android.R.dimen.app_icon_size); } /** * Returns a Drawable representing the thumbnail of the specified Drawable. * The size of the thumbnail is defined by the dimension * android.R.dimen.launcher_application_icon_size. * * This method is not thread-safe and should be invoked on the UI thread only. * * @param icon The icon to get a thumbnail of. * * @return A thumbnail for the specified icon or the icon itself if the * thumbnail could not be created. */ public Drawable createIconThumbnail(Drawable icon) { int width = mIconWidth; int height = mIconHeight; final int iconWidth = icon.getIntrinsicWidth(); final int iconHeight = icon.getIntrinsicHeight(); if (icon instanceof PaintDrawable) { PaintDrawable painter = (PaintDrawable) icon; painter.setIntrinsicWidth(width); painter.setIntrinsicHeight(height); } if (width > 0 && height > 0) { if (width < iconWidth || height < iconHeight) { final float ratio = (float) iconWidth / iconHeight; if (iconWidth > iconHeight) { height = (int) (width / ratio); } else if (iconHeight > iconWidth) { width = (int) (height * ratio); } final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c); final Canvas canvas = mCanvas; canvas.setBitmap(thumb); // Copy the old bounds to restre them later // If we were to do oldBounds = icon.getBounds(), // the call to setBounds() that follows would // change the same instance and we would lose the // old bounds mOldBounds.set(icon.getBounds()); final int x = (mIconWidth - width) / 2; final int y = (mIconHeight - height) / 2; icon.setBounds(x, y, x + width, y + height); icon.draw(canvas); icon.setBounds(mOldBounds); icon = new BitmapDrawable(getResources(), thumb); } else if (iconWidth < width && iconHeight < height) { final Bitmap.Config c = Bitmap.Config.ARGB_8888; final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c); final Canvas canvas = mCanvas; canvas.setBitmap(thumb); mOldBounds.set(icon.getBounds()); final int x = (width - iconWidth) / 2; final int y = (height - iconHeight) / 2; icon.setBounds(x, y, x + iconWidth, y + iconHeight); icon.draw(canvas); icon.setBounds(mOldBounds); icon = new BitmapDrawable(getResources(), thumb); } } return icon; } } @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); mPackageManager = getPackageManager(); requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setProgressBarIndeterminateVisibility(true); onSetContentView(); mIconResizer = new IconResizer(); mIntent = new Intent(getTargetIntent()); mIntent.setComponent(null); mAdapter = new ActivityAdapter(mIconResizer); setListAdapter(mAdapter); getListView().setTextFilterEnabled(true); setProgressBarIndeterminateVisibility(false); } /** * Override to call setContentView() with your own content view to * customize the list layout. */ protected void onSetContentView() { setContentView(com.android.internal.R.layout.activity_list); } @Override protected void onListItemClick(ListView l, View v, int position, long id) { Intent intent = intentForPosition(position); startActivity(intent); } /** * Return the actual Intent for a specific position in our * {@link android.widget.ListView}. * @param position The item whose Intent to return */ protected Intent intentForPosition(int position) { ActivityAdapter adapter = (ActivityAdapter) mAdapter; return adapter.intentForPosition(position); } /** * Return the {@link ListItem} for a specific position in our * {@link android.widget.ListView}. * @param position The item to return */ protected ListItem itemForPosition(int position) { ActivityAdapter adapter = (ActivityAdapter) mAdapter; return adapter.itemForPosition(position); } /** * Get the base intent to use when running * {@link PackageManager#queryIntentActivities(Intent, int)}. */ protected Intent getTargetIntent() { return new Intent(); } /** * Perform query on package manager for list items. The default * implementation queries for activities. */ protected List onQueryPackageManager(Intent queryIntent) { return mPackageManager.queryIntentActivities(queryIntent, /* no flags */ 0); } /** * Perform the query to determine which results to show and return a list of them. */ public List makeListItems() { // Load all matching activities and sort correctly List list = onQueryPackageManager(mIntent); Collections.sort(list, new ResolveInfo.DisplayNameComparator(mPackageManager)); ArrayList result = new ArrayList(list.size()); int listSize = list.size(); for (int i = 0; i < listSize; i++) { ResolveInfo resolveInfo = list.get(i); result.add(new ListItem(mPackageManager, resolveInfo, null)); } return result; } }