parametros - getadapter android

Filter ListView con arrayadapter

Question

Estoy tratando de filtrar una vista de lista con arrayadapter. El parámetro arraydapter es una cadena [] []. El problema es que todo sucede. Debo anular la interfaz de filtro? En ese caso, ¿alguien puede dar algunas pistas?

Cada posición de la matriz que estoy tratando de filtrar es como

 galleryValues[0][0] -> "tiulo"
[0][1] -> "desc"
[0][2] -> "etc"

Intenté filtrarlo:

lstContinente = (ListView)findViewById(R.id.list);
lstContinente.setTextFilterEnabled(true);
adapter = new PortaitArrayAdapter(cx,galleryValues);
lstContinente.setAdapter(adapter);
ed_busqueda.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
adapter.getFilter().filter(s.toString());
adapter.notifyDataSetChanged();
}
});

El código del adaptador:

public class PortaitArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[][] values;
private List<Imagen> imagenes = null;
private LayoutInflater mInflater;
public ImageLoader imageLoader;
public PortaitArrayAdapter(Context context, String[][] values) {
super(context, R.layout.gallery_row);
this.context = context;
this.values = values;
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imagenes = new ArrayList<Imagen>();
for (int i = 0; i < 20; i++) imagenes.add(new Imagen());
Bitmap def = BitmapFactory.decodeResource(this.context.getResources(),R.drawable.ic_launcher);
imageLoader=new ImageLoader(this.context,def, imagenes);
}
@Override
public int getCount (){
return this.values.length;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.gallery_row, parent, false);
holder.txtTitulo = (TextView) convertView.findViewById(R.id.txt_gallery_titulo);
holder.txtDesc = (TextView) convertView.findViewById(R.id.txt_gallery_desc);
holder.txtFecha = (TextView) convertView.findViewById(R.id.txt_gallery_fecha);
holder.txtEst = (TextView) convertView.findViewById(R.id.txt_gallery_est);
holder.imageView = (ImageView)convertView.findViewById(R.id.lst_img_gallery);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
/*LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.gallery_row, parent, false);*/
//ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
Bitmap bmp;
Log.v("Position --> ",String.valueOf(position));
try {
byte b[] = imagenes.get(position).getImageData();
if (b != null) {
bmp = BitmapFactory.decodeByteArray(b, 0, b.length);
if (bmp != null) holder.imageView.setImageBitmap(bmp);
} else {
String urlBase = galleryValues[position][0].substring(0, galleryValues[position][0].lastIndexOf("/")+1);
String urlToEncode = galleryValues[position][0].substring(galleryValues[position][0].lastIndexOf("/")+1, galleryValues[position][0].length());
urlToEncode = URLEncoder.encode(urlToEncode,"UTF-8");
String url = urlBase.concat(urlToEncode);
url = url.replace("+", "%20");
Log.v("UrlFinal --> ",url);
imageLoader.DisplayImage(String.valueOf(position),url,act,holder.imageView, position,null);
}
} catch (Exception e) {
Log.e(this.getClass().getName(),"Exception en pos = " + position + " error:" + e.getMessage());
e.printStackTrace();
}
holder.txtTitulo.setText(galleryValues[position][1] + ", " + galleryValues[position][2]);
String[] dates = galleryValues[position][4].split("/");
String date = dates [1] + "/" + dates[0] + "/" + dates[2];
Date d1 = new Date(date);
DateFormat df = DateFormat.getDateInstance(DateFormat.LONG);
holder.txtDesc.setText(galleryValues[position][3]);
holder.txtFecha.setText(df.format(d1));
holder.txtEst.setText(getText(R.string.num_fotos_gallery) + galleryValues[position][5] + " - " + getText(R.string.num_videos_gallery) + galleryValues[position][6] + " - " + getText(R.string.num_exp_gallery) + galleryValues[position][7]);
return convertView;
}
}
private static class ViewHolder {
TextView txtTitulo;
TextView txtDesc;
TextView txtFecha;
TextView txtEst;
ImageView imageView;
}

Answer 1

Convierta su matriz de cadenas a ArrayList y páselo al Adapter y utilice el código siguiente o cambie el código a continuación con su String[] .

Override getFilter() implementar Filterable en su clase Adapter y Override getFilter()

Consulte este ejemplo completo para filtrar Adapter personalizado.

public class ListFilterActivity extends ListActivity {
private List<String> list = new ArrayList<String>();
List<String> 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<String> 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<String> arrayList;
List<String> mOriginalValues; // Original Values
LayoutInflater inflater;
public MyAdapter(Context context, List<String> arrayList) {
this.arrayList = arrayList;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return 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<String>) 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<String> FilteredArrList = new ArrayList<String>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<String>(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().startsWith(constraint.toString())) {
FilteredArrList.add(data);
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
}
}

Answer 2

Aquí menciono el código de cómo podemos filtrar los datos ListView usando un Adaptador personalizado
Realmente te ayuda

ListViewAdapter.java

public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
public List<AllFoodItem> allFoodItemlist;
public ArrayList<AllFoodItem> arraylist;
public ListViewAdapter(Context context, List<AllFoodItem> allFoodItemlist) {
mContext = context;
this.allFoodItemlist = allFoodItemlist;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<AllFoodItem>();
this.arraylist.addAll(allFoodItemlist);
}
@Override
public int getCount() {
return allFoodItemlist.size();
}
@Override
public AllFoodItem getItem(int position) {
return allFoodItemlist.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public class Holder {
TextView foodname, quantity, calorie;
}
public View getView(final int position, View view, ViewGroup parent) {
Holder holder = new Holder();
view = inflater.inflate(R.layout.program_list, null);
// Locate the TextViews in listview_item.xml
holder.foodname = (TextView) view.findViewById(R.id.textView1);
// Set the results into TextViews holder.foodname.setText(allFoodItemlist.get(position).getName().toString());
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
allFoodItemlist.clear();
if (charText.length() == 0) {
allFoodItemlist.addAll(arraylist);
} else {
for (AllFoodItem wp : arraylist) {
if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText)) {
allFoodItemlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}

MainActivity.java

use el filtro de aplicación de clase ListViewAdapter en EditText usando el método filter ()

inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
foodname = (inputSearch.getText().toString()).trim();
// filter the data of edit Text using filter method in ListViewAdapter
String text = inputSearch.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 afterTextChanged(Editable arg0) {
userGet();
// TODO Auto-generated method stub
}
});