Adaptador de vista de lista personalizado con filtro Android

Estoy intentando implementar un filtro en mi lista de lista. Pero cada vez que el texto cambia, la lista desaparece. Ayuda Aquí están mis códigos. La clase de adaptador.

package com.talagbe.schymn; import java.util.ArrayList; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.TextView; public class HymnsAdapter extends ArrayAdapter { ArrayList hymnarray; Context context; LayoutInflater inflater; int Resource; public HymnsAdapter(Context context, int resource, ArrayList objects) { super(context, resource, objects); // TODO Auto-generated constructor stub hymnarray=objects; Resource= resource; this.context=context; inflater= (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE); } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder holder; if(convertView==null){ convertView= inflater.inflate(Resource,null); holder= new ViewHolder(); holder.hymntitle= (TextView) convertView.findViewById(R.id.Hymn_title); // holder.hymntext= (TextView) convertView.findViewById(R.id.Channel_name); convertView.setTag(holder); }else{ holder=(ViewHolder)convertView.getTag(); } holder.hymntitle.setText(hymnarray.get(position).getTitle()); //holder.hymntext.setText(hymnarray.get(position).getText()); return convertView; } static class ViewHolder{ public TextView hymntitle; public TextView hymntext; } } 

Aquí está la otra clase donde bash implementar el filtro. Tengo un edittext, donde lo implemento en textChangeListener

 package com.talagbe.schymn; import java.util.ArrayList; import database.DatabaseHelper; import android.os.Bundle; import android.support.v4.app.Fragment; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.EditText; import android.widget.ListView; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.widget.AdapterView.OnItemClickListener; public class Home extends Fragment { private static final String DB_NAME = "schymn.sqlite"; private static final String TABLE_NAME = "Hymns"; private static final String Hymn_ID = "_id"; private static final String Hymn_Title = "Title"; private static final String Hymn_Text = "Text"; private SQLiteDatabase database; ListView list; EditText search; HymnsAdapter vadapter; ArrayList HymnsList; String url; Context context=null; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub return inflater.inflate(R.layout.index, container,false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onCreate(savedInstanceState); list = (ListView)getActivity().findViewById(R.id.hymn_list); search = (EditText) getActivity().findViewById(R.id.search); HymnsList = new ArrayList(); DatabaseHelper dbOpenHelper = new DatabaseHelper(getActivity(), DB_NAME); database = dbOpenHelper.openDataBase(); fillHymns(); //setUpList(); } private void fillHymns() { Cursor hymnCursor = database.query(TABLE_NAME, new String[] {Hymn_ID, Hymn_Title,Hymn_Text}, null, null, null, null , Hymn_Title); hymnCursor.moveToFirst(); if(!hymnCursor.isAfterLast()) { do { Hymns hy = new Hymns(); hy.setTitle(hymnCursor.getString(1)); hy.setText(hymnCursor.getString(2)); HymnsList.add(hy); } while (hymnCursor.moveToNext()); } hymnCursor.close(); vadapter = new HymnsAdapter(getActivity().getApplicationContext(),R.layout.hymns,HymnsList); list.setAdapter(vadapter); list.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { Intent intent = new Intent(getActivity().getApplicationContext(), Hymn_Text.class); intent.putExtra("Title",HymnsList.get(position).getTitle()); intent.putExtra("Text",HymnsList.get(position).getText()); startActivity(intent); //Log.i("Text",HymnsList.get(position).getText()); } }); search.addTextChangedListener( new TextWatcher() { @Override public void onTextChanged(CharSequence cs, int start, int before, int count) { // TODO Auto-generated method stub if(count>0){ } } @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 Home.this.vadapter.getFilter().filter(s); Log.i("Changed",s.toString()); } }); } } 

El registro, registra cualquier entrada que escriba, pero no muestra la vista de lista. Gracias

Puede usar la interfaz filtrable en su adaptador, vea un buen ejemplo a continuación:

fuente original y Vea otro ejemplo aquí

 public class SearchableAdapter extends BaseAdapter implements Filterable { private ListoriginalData = null; private ListfilteredData = null; private LayoutInflater mInflater; private ItemFilter mFilter = new ItemFilter(); public SearchableAdapter(Context context, List data) { this.filteredData = data ; this.originalData = data ; mInflater = LayoutInflater.from(context); } public int getCount() { return filteredData.size(); } public Object getItem(int position) { return filteredData.get(position); } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { // A ViewHolder keeps references to children views to avoid unnecessary calls // to findViewById() on each row. ViewHolder holder; // When convertView is not null, we can reuse it directly, there is no need // to reinflate it. We only inflate a new View when the convertView supplied // by ListView is null. if (convertView == null) { convertView = mInflater.inflate(R.layout.list_item, null); // Creates a ViewHolder and store references to the two children views // we want to bind data to. holder = new ViewHolder(); holder.text = (TextView) convertView.findViewById(R.id.list_view); // Bind the data efficiently with the holder. convertView.setTag(holder); } else { // Get the ViewHolder back to get fast access to the TextView // and the ImageView. holder = (ViewHolder) convertView.getTag(); } // If weren't re-ordering this you could rely on what you set last time holder.text.setText(filteredData.get(position)); return convertView; } static class ViewHolder { TextView text; } public Filter getFilter() { return mFilter; } private class ItemFilter extends Filter { @Override protected FilterResults performFiltering(CharSequence constraint) { String filterString = constraint.toString().toLowerCase(); FilterResults results = new FilterResults(); final List list = originalData; int count = list.size(); final ArrayList nlist = new ArrayList(count); String filterableString ; for (int i = 0; i < count; i++) { filterableString = list.get(i); if (filterableString.toLowerCase().contains(filterString)) { nlist.add(filterableString); } } results.values = nlist; results.count = nlist.size(); return results; } @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint, FilterResults results) { filteredData = (ArrayList) results.values; notifyDataSetChanged(); } } } //in your Activity or Fragment where of Adapter is instantiated : editTxt.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { System.out.println("Text ["+s+"]"); mSearchableAdapter.getFilter().filter(s.toString()); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { } }); 

Espero que sea útil para otros.

 // put below code (method) in Adapter class public void filter(String charText) { charText = charText.toLowerCase(Locale.getDefault()); myList.clear(); if (charText.length() == 0) { myList.addAll(arraylist); } else { for (MyBean wp : arraylist) { if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText)) { myList.add(wp); } } } notifyDataSetChanged(); } 

declarar a continuación el código en la clase de adaptador

 private ArrayList myList; // for loading main list private ArrayList arraylist=null; // for loading filter data 

debajo del código en el adaptador Constructor

 this.arraylist = new ArrayList(); this.arraylist.addAll(myList); 

y debajo del código en su clase de actividad

 final EditText searchET = (EditText)findViewById(R.id.search_et); // Capture Text in EditText searchET.addTextChangedListener(new TextWatcher() { @Override public void afterTextChanged(Editable arg0) { // TODO Auto-generated method stub String text = searchET.getText().toString().toLowerCase(Locale.getDefault()); adapter.filter(text); } @Override public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { // TODO Auto-generated method stub } @Override public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { // TODO Auto-generated method stub } }); 

por favor revisa el código a continuación, te ayudará

 DrawerActivity.userListview .setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView< ?> parent, View view, int position, long id) { int pos = position; Intent intent = new Intent(getContext(), UserDetail.class); intent.putExtra("model", list.get(position)); context.startActivity(intent); } }); return convertView; } @Override public android.widget.Filter getFilter() { return new android.widget.Filter() { @Override protected void publishResults(CharSequence constraint, FilterResults results) { ArrayList updatelist = (ArrayList) results.values; UserListCustomAdaptor newadaptor = new UserListCustomAdaptor( getContext(), getCount(), updatelist); if (results.equals(constraint)) { updatelist.add(modelobj); } if (results.count > 0) { notifyDataSetChanged(); } else { notifyDataSetInvalidated(); } } @Override protected FilterResults performFiltering(CharSequence constraint) { FilterResults filterResults = new FilterResults(); list = new ArrayList(); if (constraint != null && DrawerActivity.userlist != null) { constraint = constraint.toString().toLowerCase(); int length = DrawerActivity.userlist.size(); int i = 0; while (i < length) { UserListModel modelobj = DrawerActivity.userlist.get(i); String data = modelobj.getFirstName() + " " + modelobj.getLastName(); if (data.toLowerCase().contains(constraint.toString())) { list.add(modelobj); } i++; } filterResults.values = list; filterResults.count = list.size(); } return filterResults; } }; } @Override public int getCount() { return list.size(); } @Override public UserListModel getItem(int position) { return list.get(position); } 

Primero, crea EditText en el archivo xml y asigna una identificación, por ejemplo, con_pag_etPesquisa. Después de eso, crearemos dos listas, donde una es la vista de lista y la otra para recibir el mismo contenido, pero se mantendrá como una copia de seguridad. Antes de mover objetos a las listas, primero los inicializa a continuación:

 //Declaring public EditText etPesquisa; public ContasPagarAdapter adapterNormal; public List lstBkp; public List lstCp; //Within the onCreate method, type the following: etPesquisa = (EditText) findViewById(R.id.con_pag_etPesquisa); etPesquisa.addTextChangedListener(new TextWatcher(){ @Override public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3){ filter(String.valueOf(cs)); } @Override public void beforeTextChanged(CharSequence cs, int arg1, int arg2, int arg3){ // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable e){ } }); //Before moving objects to lists first initializes them as below: lstCp = new ArrayList(); lstBkp = new ArrayList(); //When you add objects to the main list, repeat the procedure also for bkp list, as follows: lstCp.add(cp); lstBkp.add(cp); //Now initializes the adapter and let the listener, as follows: adapterNormal = new ContasPagarAdapter(ContasPagarActivity.this, lstCp); lvContasPagar.setAdapter(adapterNormal); lvContasPagar.setOnItemClickListener(verificaClickItemContasPagar(lstCp)); //Now create the methods inside actito filter the text entered by the user, as follows: public void filter(String charText){ charText = charText.toLowerCase(); lstCp.clear(); if (charText.length() == 0){ lstCp.addAll(lstBkp); appendAddItem(lstBkp); } else { for (int i = 0; i < lstBkp.size(); i++){ if((lstBkp.get(i).getNome_lancamento() + " - " + String.valueOf(lstBkp.get(i).getCodigo())).toLowerCase().contains(charText)){ lstCp.add(lstBkp.get(i)); } } appendAddItem(lstCp); } } private void appendAddItem(final List novaLista){ runOnUiThread(new Runnable(){ @Override public void run(){ adapterNormal.notifyDataSetChanged(); } }); } 

puede encontrar una clase de adaptador de lista personalizada con filtros modificables mediante el cambio de texto en el texto de edición …

crear una clase de adaptador de lista personalizada con la implementación de Filterable:

 private class CustomListAdapter extends BaseAdapter implements Filterable{ private LayoutInflater inflater; private ViewHolder holder; private ItemFilter mFilter = new ItemFilter(); public CustomListAdapter(List newlist) { filteredData = newlist; } @Override public int getCount() { return filteredData.size(); } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { holder = new ViewHolder(); if(inflater==null) inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); if(convertView == null){ convertView = inflater.inflate(R.layout.row_listview_item, null); holder.mTextView = (TextView)convertView.findViewById(R.id.row_listview_member_tv); convertView.setTag(holder); }else{ holder = (ViewHolder)convertView.getTag(); } holder.mTextView.setText(""+filteredData.get(position).getYourdata()); return convertView; } @Override public Filter getFilter() { return mFilter; } } class ViewHolder{ TextView mTextView; } private class ItemFilter extends Filter { @SuppressLint("DefaultLocale") @Override protected FilterResults performFiltering(CharSequence constraint) { String filterString = constraint.toString().toLowerCase(); FilterResults results = new FilterResults(); final List list = YourObject.getYourDataList(); int count = list.size(); final ArrayList nlist = new ArrayList(count); String filterableString ; for (int i = 0; i < count; i++) { filterableString = ""+list.get(i).getYourText(); if (filterableString.toLowerCase().contains(filterString)) { YourCustomData mYourCustomData = list.get(i); nlist.add(mYourCustomData); } } results.values = nlist; results.count = nlist.size(); return results; } @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence constraint, FilterResults results) { filteredData = (ArrayList) results.values; mCustomListAdapter.notifyDataSetChanged(); } } mEditTextSearch.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { if(mCustomListAdapter!=null) mCustomListAdapter.getFilter().filter(s.toString()); } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { } }); 

Una cosa que noté es que cada vez que editas la lista (agregando elementos, por ejemplo) y @Override getView por ella, dentro del método @Override getView , no debes usar @Override getView filteredData.get(position) , ya que arroja una excepción de IndexOutOfBounds .

En cambio, lo que funcionó para mí fue el método getItem(position) , que pertenece a la clase ArrayAdapter .

Puede implementar el filtro de búsqueda en la vista de lista de dos maneras. 1. usando searchview 2. usando edittext.

  1. Si quieres usar searchview, lee aquí: searchview filter.

  2. Si desea usar edittext, lea a continuación.

Me he tomado como referencia de: listview search filter android

Fragmentos de código para hacer filtro con edittext.

Primero crea la clase de modelo MovieNames.java:

 public class MovieNames { private String movieName; public MovieNames(String movieName) { this.movieName = movieName; } public String getMovieName() { return this.movieName; } } 

Crear el archivo listview_item.xml:

     

Hacer la clase ListViewAdapter.java:

  import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView; import java.util.ArrayList; import java.util.Locale; public class ListViewAdapter extends BaseAdapter { // Declare Variables Context mContext; LayoutInflater inflater; private ArrayList arraylist; public ListViewAdapter(Context context, ArrayList arraylist) { mContext = context; inflater = LayoutInflater.from(mContext); this.arraylist = arraylist; } public class ViewHolder { TextView name; } @Override public int getCount() { return arraylist.size(); } @Override public MovieNames getItem(int position) { return arraylist.get(position); } @Override public long getItemId(int position) { return position; } public View getView(final int position, View view, ViewGroup parent) { final ViewHolder holder; if (view == null) { holder = new ViewHolder(); view = inflater.inflate(R.layout.listview_item, null); // Locate the TextViews in listview_item.xml holder.name = (TextView) view.findViewById(R.id.name); view.setTag(holder); } else { holder = (ViewHolder) view.getTag(); } // Set the results into TextViews holder.name.setText(arraylist.get(position).getMovieName()); return view; } } 

Prepare el archivo activity_main.xml:

  < ?xml version="1.0" encoding="utf-8"?>       

Finalmente haga la clase MainActivity.java:

  import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.EditText; import android.widget.ListView; import android.widget.SearchView; import android.widget.Toast; import java.util.ArrayList; public class MainActivity extends AppCompatActivity { private EditText etsearch; private ListView list; private ListViewAdapter adapter; private String[] moviewList; public static ArrayList movieNamesArrayList; public static ArrayList array_sort; int textlength = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Generate sample data moviewList = new String[]{"Xmen", "Titanic", "Captain America", "Iron man", "Rocky", "Transporter", "Lord of the rings", "The jungle book", "Tarzan","Cars","Shreck"}; list = (ListView) findViewById(R.id.listView); movieNamesArrayList = new ArrayList<>(); array_sort = new ArrayList<>(); for (int i = 0; i < moviewList.length; i++) { MovieNames movieNames = new MovieNames(moviewList[i]); // Binds all strings into an array movieNamesArrayList.add(movieNames); array_sort.add(movieNames); } adapter = new ListViewAdapter(this,movieNamesArrayList); list.setAdapter(adapter); etsearch = (EditText) findViewById(R.id.editText); list.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { Toast.makeText(MainActivity.this, array_sort.get(position).getMovieName(), Toast.LENGTH_SHORT).show(); } }); etsearch.addTextChangedListener(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) { textlength = etsearch.getText().length(); array_sort.clear(); for (int i = 0; i < movieNamesArrayList.size(); i++) { if (textlength <= movieNamesArrayList.get(i).getMovieName().length()) { Log.d("ertyyy",movieNamesArrayList.get(i).getMovieName().toLowerCase().trim()); if (movieNamesArrayList.get(i).getMovieName().toLowerCase().trim().contains( etsearch.getText().toString().toLowerCase().trim())) { array_sort.add(movieNamesArrayList.get(i)); } } } adapter = new ListViewAdapter(MainActivity.this, array_sort); list.setAdapter(adapter); } }); } }