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GetFilter personalizado en ArrayAdapter personalizado en android

Question

Tengo problemas para implementar getFilter personalizado en arrayAdapter personalizado. En realidad, no tengo idea de cómo implementarlo. Intenté varios códigos, pero todavía no tuve suerte. Aquí está mi adaptador de matriz personalizado.

package com.test.FilterableList.Adapters;
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;
import com.test.FilterableList.Models.ListTO;
import com.test.FilterableList.R;
import android.widget.Filterable;
public class FilterableAdapter extends ArrayAdapter<ListTO> implements Filterable {
// declaring our ArrayList of items
public ArrayList<ListTO> objects;
/* here we must override the constructor for ArrayAdapter
* the only variable we care about now is ArrayList<Item> objects,
* because it is the list of objects we want to display.
*/
public FilterableAdapter(Context context, int textViewResourceId, ArrayList<ListTO> objects) {
super(context, textViewResourceId, objects);
this.objects = objects;
}
/*
* we are overriding the getView method here - this is what defines how each
* list item will look.
*/
public View getView(int position, View convertView, ViewGroup parent){
// assign the view we are converting to a local variable
View v = convertView;
// first check to see if the view is null. if so, we have to inflate it.
// to inflate it basically means to render, or show, the view.
if (v == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.list_item, null);
}
/*
* Recall that the variable position is sent in as an argument to this method.
* The variable simply refers to the position of the current object in the list. (The ArrayAdapter
* iterates through the list we sent it)
*
* Therefore, i refers to the current Item object.
*/
ListTO i = objects.get(position);
if (i != null) {
// This is how you obtain a reference to the TextViews.
// These TextViews are created in the XML files we defined.
TextView tt = (TextView) v.findViewById(R.id.list_name);
if (tt != null){
tt.setText(i.FileName);
}
}
// the view must be returned to our activity
return v;
}
}

Y aquí está la clase ListTO.

package com.test.FilterableList.Models;
public class ListTO {
public int Id;
public String FileName;
public String FileUri;
public ListTO(int id, String fileName, String fileUri) {
Id = id;
FileName = fileName;
FileUri = fileUri;
}
}

Y aquí está el diseño.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/blacklikenbackground"
tools:context=".AllListActivity" >
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Search"
android:id="@+id/inputSearch"
/>
<ListView
android:id="@+id/test_list"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>

Aquí la palabra clave de búsqueda proviene de "inputSearch" EditText.

Aquí está el oyente cambiado de texto.

 inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
// Toast.makeText(getActivity(), cs.toString(), Toast.LENGTH_LONG).show();
m_adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});

Gracias.

Answer 1

Como dijiste "Quiero implementar la función de sugerencia automática como en Google; pero aquí desde la vista de lista. - Redirigir"

Hay otra forma de hacerlo usando AutoCompleteTextView

Para obtener más información, vaya a AutoCompleteTextView

OutPut se verá así

main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listitem_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#e2e2e2"
android:orientation="vertical" >
<AutoCompleteTextView
android:id="@+id/autocomplete"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:background="@drawable/text_area"
android:inputType="text|textNoSuggestions|textMultiLine"
android:paddingLeft="10dp"
android:popupBackground="#EFEEEC"
android:textColor="#333333"
android:textColorHint="#9c9c9c"
android:textSize="18sp"
android:completionThreshold="1" />
</LinearLayout>

auto_textview.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="12dp"
android:textColor="#333333"
android:layout_margin="15dp"
android:textSize="16sp" >
</TextView>

MainActivity.java

public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AutoCompleteTextView seachView = (AutoCompleteTextView) findViewById(R.id.autocomplete);
seachView.setAdapter(new ArrayAdapter<String>(this,
R.layout.auto_textview, getHeading()));
}
/**
* @return
*/
public List<String> getHeading() {
List<String> list = new ArrayList<String>();
list.add("Android");
list.add("Arnold");
list.add("Blackberry");
list.add("Blackpearl");
list.add("Country");
list.add("Canada");
list.add("City");
list.add("Street Address");
list.add("Objective C");
return list;
}
}

Espero que esto te ayudará.

Answer 2

Está teniendo problemas, principalmente porque está utilizando un objeto personalizado. Si transfiere un valor String o int al adaptador de matriz, sabrá cómo filtrarlo. Pero si pasa la implementación del filtro predeterminado del objeto personalizado no tiene ni idea de cómo lidiar con eso.

Aunque no está claro lo que intenta hacer en su filtro, le recomiendo seguir los pasos.

1. La implementación correcta de ListTO , aunque no tiene nada que ver con su objetivo en este momento
2. Implementar filtro personalizado
3. devuelve tu filtro

Implementar filtro personalizado

Lo primero que debe hacer es implements Filterable desde su adaptador de matriz.

En segundo lugar, proporcione la implementación de su Filter

Filter myFilter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
ArrayList<ListTO> tempList=new ArrayList<ListTO>();
//constraint is the result from text you want to filter against.
//objects is your data set you will filter from
if(constraint != null && objects!=null) {
int length=objects.size();
int i=0;
while(i<length){
ListTO item=objects.get(i);
//do whatever you wanna do here
//adding result set output array
tempList.add(item);
i++;
}
//following two lines is very important
//as publish result can only take FilterResults objects
filterResults.values = tempList;
filterResults.count = tempList.size();
}
return filterResults;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence contraint, FilterResults results) {
objects = (ArrayList<ListTO>) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};

Último paso,

@Override
public Filter getFilter() {
return myFilter;
}

Answer 3

No es necesario escribir el adaptador de matriz. escriba un método toString () que debería devolver el valor del nombre del archivo.

Me gusta

public class ListTO {
public int Id;
public String FileName;
public String FileUri;
public ListTO(int id, String fileName, String fileUri) {
Id = id;
FileName = fileName;
FileUri = fileUri;
}
public String toString(){
return FileName
}
}

Answer 4

Puede anular toString () en su clase de objeto personalizado y devolver el objeto String que desea filtrar.

@Override
public void toString(){
return this.toBeFilteredString;
}

Y luego simplemente use el filtro incorporado predeterminado de arrayAdapter y llámelo usando

adapter.getFilter().filter(Charsequence c);

Answer 5

prueba esto:

 public class Adptr extends BaseAdapter implements Filterable {
public ArrayList<Model> modelValues;
private Activity activity;
private LayoutInflater layoutinflater;
private List<Model> mOriginalValues;
private int PositionSelected = 0;
public Adptr (ArrayList<Model> modelValues, Activity activity) {
super();
this.modelValues = modelValues;
this.activity = activity;
}
@Override
public int getCount() {
return modelValues.size();
}
@Override
public Object getItem(int position) {
return modelValues.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
layoutinflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ViewHolder holder = null;
Model model = modelValues.get(position);
if (convertView == null || !(convertView.getTag() instanceof ViewHolder)) {
convertView = layoutinflater.inflate(R.layout.row_search, null);
holder = new ViewHolder();
holder.txtName = (TextView) convertView.findViewById(R.id.row_serch_txt_name);
convertView.setTag(holder);
convertView.setTag(R.id.row_serch_txt_name, holder.txtName);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtArtistName.setText("" + modelValue.get_NAME());
return convertView;
}
class ViewHolder {
TextView txtName;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
modelValues = (ArrayList<ModelValueArtist>) results.values; // has
notifyDataSetChanged();
}
@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>();
List<Model> FilteredArrList = new ArrayList<Model>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<Model>(modelValues); // saves
}
/********
*
* 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 {
Locale locale = Locale.getDefault();
constraint = constraint.toString().toLowerCase(locale);
for (int i = 0; i < mOriginalValues.size(); i++) {
Model model = mOriginalValues.get(i);
String data = model.get_NAME();
if (data.toLowerCase(locale).contains(constraint.toString())) {
FilteredArrList.add(modelMyMall);
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
}

Answer 6

getFilter() anular el método getFilter() en el Adaptador y proporcionar su propio filtro. Eche un vistazo en este ejemplo filtrable para ver una implementación real.

Agregue el siguiente código getFilter() a su clase FilterableAdapter y llénelo con su filtro:

/* (non-Javadoc)
* @see android.widget.ArrayAdapter#getFilter()
*/
@Override
public Filter getFilter() {
return new Filter() {
/* (non-Javadoc)
* @see android.widget.Filter#performFiltering(java.lang.CharSequence)
*/
@Override
protected FilterResults performFiltering(CharSequence constraint) {
// TODO Auto-generated method stub
/*
* Here, you take the constraint and let it run against the array
* You return the result in the object of FilterResults in a form
* you can read later in publichResults.
*/
return null;
}
/* (non-Javadoc)
* @see android.widget.Filter#publishResults(java.lang.CharSequence, android.widget.Filter.FilterResults)
*/
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
// TODO Auto-generated method stub
/*
* Here, you take the result, put it into Adapters array
* and inform about the the change in data.
*/
}
};
}

He agregado consejos sobre qué hacer en los comentarios.