GetFilter khusus di ArrayAdapter khusus di android

Saya mengalami kesulitan dalam mengimplementasikan getFilter kustom di dalam arrayAdapter kustom. Sebenarnya saya tidak tahu bagaimana cara mengimplementasikannya. Sudah mencoba berbagai macam kode tetapi masih belum berhasil. Berikut adalah custom array adapter saya.

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;

    }
}

Dan ini adalah kelas 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;

    }

}

Dan berikut adalah tata letaknya.

<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>

Di sini kata kunci pencarian berasal dari "inputSearch" dan "EditText".

Di sini ' s pendengar teks yang diubah.

 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
                    }
                });

Terima kasih.

Redone
Pertanyaan edit 4 Oktober 2013 в 6:40
Pemrograman
android android-listview android-arrayadapter
1 Oktober 2013 в 6:00
3 tayangan
Larutan

Anda mengalami masalah, terutama karena Anda menggunakan objek kustom. Jika Anda mengoper nilai String atau int ke adapter array, ia tahu bagaimana cara memfilternya. Tetapi jika Anda mengoper objek kustom implementasi filter default tidak tahu bagaimana mengatasinya.

Meskipun tidak jelas apa yang Anda coba lakukan dalam filter Anda, saya sarankan Anda mengikuti langkah-langkah berikut.

  1. Implementasi yang tepat dari ListTO, meskipun tidak ada hubungannya dengan tujuan Anda saat ini
  2. Menerapkan filter khusus
  3. Kembalikan filter Anda

Menerapkan filter khusus Menerapkan filter khusus

Hal pertama yang harus Anda lakukan adalah, mengimplementasikan Filterable dari adaptor array Anda.

Kedua, berikan implementasi dari Filter Anda

Filter myFilter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
         FilterResults filterResults = new FilterResults();   
         ArrayList tempList=new ArrayList();
         //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 0) {
           notifyDataSetChanged();
          } else {
              notifyDataSetInvalidated();
          }  
      }
     };

Langkah terakhir,

@Override
     public Filter getFilter() {
        return myFilter;
    }
Komentar (8)

Anda perlu mengganti metode getFilter() di Adapter dan menyediakan filter Anda sendiri. Lihatlah di Contoh Filterable ini untuk melihat implementasi yang sebenarnya.

Tambahkan kode getFilter() berikut ini ke kelas FilterableAdapter Anda dan isi dengan pemfilteran Anda:

/* (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.
             */
        }

    };
}

Saya telah menambahkan petunjuk apa yang harus dilakukan di komentar.

Komentar (0)

coba ini:

     public class Adptr extends BaseAdapter implements Filterable {
public ArrayList modelValues;

private Activity activity;
private LayoutInflater layoutinflater;
private List mOriginalValues;
private int PositionSelected = 0;

public Adptr (ArrayList 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) results.values; // has

            notifyDataSetChanged();
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults(); // Holds the
                                                            // results of a
                                                            // filtering
                                                            // operation in
                                                            // values
            // List FilteredArrList = new ArrayList();
            List FilteredArrList = new ArrayList();

            if (mOriginalValues == null) {
                mOriginalValues = new ArrayList(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;
  }

     }
Komentar (1)