带有过滤器 Android 的自定义 Listview 适配器

Custom Listview Adapter with filter Android

提问by olakunle

Please am trying to implement a filter on my listview. But whenever the text change, the list disappears.Please Help Here are my codes. The adapter class.

请尝试在我的列表视图上实施过滤器。但是每当文本更改时，列表就会消失。请帮助这是我的代码。适配器类。

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<Hymns> {
ArrayList<Hymns> hymnarray;
Context context;
LayoutInflater inflater;
int Resource;


public HymnsAdapter(Context context, int resource, ArrayList<Hymns> 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;

}

 }

Here is the other class where am trying to implement the filter. I have an edittext,where i implement on textChangeListener

这是我试图实现过滤器的另一个类。我有一个编辑文本，我在 textChangeListener 上实现

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<Hymns> 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<Hymns>();

    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());
        }
    });
}




  }

The log,logs whatever input i type in,but doesn't show the listview. Thank you

日志，记录我输入的任何输入，但不显示列表视图。谢谢

回答by Anderson K

You can use the Filterable interface on your Adapter, see a good example below:

您可以在适配器上使用 Filterable 接口，请参阅下面的一个很好的示例：

original sourceand See other example here

原始来源并在此处查看其他示例

public class SearchableAdapter extends BaseAdapter implements Filterable {

    private List<String>originalData = null;
    private List<String>filteredData = null;
    private LayoutInflater mInflater;
    private ItemFilter mFilter = new ItemFilter();

    public SearchableAdapter(Context context, List<String> 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<String> list = originalData;

            int count = list.size();
            final ArrayList<String> nlist = new ArrayList<String>(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<String>) 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) {
    }
});

回答by Tara

I hope it will be helpful for others.

我希望它会对其他人有所帮助。

// 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();
}

declare below code in adapter class

在适配器类中声明以下代码

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

below code in adapter Constructor

下面是适配器构造函数中的代码

this.arraylist = new ArrayList<MyBean>();
    this.arraylist.addAll(myList);

and below code in your activity class

以及您活动类中的以下代码

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
        }
    });

回答by Bhavinkumar Patel

please check below code it will help you

请检查下面的代码它会帮助你

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<UserListModel> updatelist = (ArrayList<UserListModel>) 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<UserListModel>();

            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);
}

回答by Richard Kamere

In your CustomAdapter class implement filterable.

在您的 CustomAdapter 类中实现可过滤。

 public class CustomAdapter extends BaseAdapter implements Filterable {

    private List<ItemsModel> itemsModelsl;
    private List<ItemsModel> itemsModelListFiltered;
    private Context context;

    public CustomAdapter(List<ItemsModel> itemsModelsl, Context context) {
        this.itemsModelsl = itemsModelsl;
        this.itemsModelListFiltered = itemsModelsl;
        this.context = context;
    }



    @Override
    public int getCount() {
        return itemsModelListFiltered.size();
    }

    @Override
    public Object getItem(int position) {
        return itemsModelListFiltered.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View view = getLayoutInflater().inflate(R.layout.row_items,null);


        TextView names = view.findViewById(R.id.name);
        TextView emails = view.findViewById(R.id.email);
        ImageView imageView = view.findViewById(R.id.images);

        names.setText(itemsModelListFiltered.get(position).getName());
        emails.setText(itemsModelListFiltered.get(position).getEmail());
        imageView.setImageResource(itemsModelListFiltered.get(position).getImages());

        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.e("main activity","item clicked");
                startActivity(new Intent(MainActivity.this,ItemsPreviewActivity.class).putExtra("items",itemsModelListFiltered.get(position)));

            }
        });

        return view;
    }



    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {

                FilterResults filterResults = new FilterResults();
                if(constraint == null || constraint.length() == 0){
                    filterResults.count = itemsModelsl.size();
                    filterResults.values = itemsModelsl;

                }else{
                    List<ItemsModel> resultsModel = new ArrayList<>();
                    String searchStr = constraint.toString().toLowerCase();

                    for(ItemsModel itemsModel:itemsModelsl){
                        if(itemsModel.getName().contains(searchStr) || itemsModel.getEmail().contains(searchStr)){
                            resultsModel.add(itemsModel);

                        }
                         filterResults.count = resultsModel.size();
                            filterResults.values = resultsModel;
                    }


                }

                return filterResults;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {

                itemsModelListFiltered = (List<ItemsModel>) results.values;
                notifyDataSetChanged();

            }
        };
        return filter;
    }
}

}

}

You can get the whole tutorial here: ListView With Search/Filter and OnItemClickListener

你可以在这里获得整个教程： ListView With Search/Filter and OnItemClickListener

Github Source Code

Github 源代码

回答by Suraj Bahadur

If you want to achieve filtering with custom model class in kotlinthen you can implement below code.

如果要使用自定义模型类实现过滤，kotlin则可以实现以下代码。

Step 1:Add SearchViewin your xmlfile and then in your activityor fragmentimplement SearchView.OnQueryTextListener

第 1 步：添加SearchView您的xml文件，然后添加您的activity或fragment实施SearchView.OnQueryTextListener

class SearchActivity : AppCompatActivity(),SearchView.OnQueryTextListener {


    lateinit var sectionModelArrayList: ArrayList<CategorySectionModel>
    lateinit var filteredArrayList: ArrayList<CategorySectionModel>

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_category_updated)
        searchView.setOnQueryTextListener(this)
    }


    //Called this method with you own data to populate the recycler view.
    private fun parseJson() {
        rv_category_list.layoutManager = LinearLayoutManager(this, RecyclerView.VERTICAL, false)
        adapter = CategoryLabelAdapter(sectionModelArrayList, this)
        rv_category_list.adapter = adapter
    }

    override fun onQueryTextSubmit(query: String?): Boolean {
        return false
    }

    override fun onQueryTextChange(newText: String?): Boolean {
        adapter.filter!!.filter(newText.toString())
        return false
    }

My model class CategorySectionModellooks like

我的模型类CategorySectionModel看起来像

class CategorySectionModel(val categoryLabel: String, val categoryItemList: ArrayList<CategoryItem>)

Now we have to work on adapter class and there you need to implement Filterableinterface and override getFilter()method like below

现在我们必须处理适配器类，并且您需要实现如下所示的Filterable接口和覆盖getFilter()方法

class CategoryLabelAdapter(internal var data: ArrayList<CategorySectionModel>?, internal var activity: Context) : RecyclerView.Adapter<CategoryLabelAdapter.ViewHolder>(), Filterable {
    val originalList = data
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val v = LayoutInflater.from(parent.context).inflate(R.layout.item_category_name, parent, false)
        return ViewHolder(v)
    }

    override fun getItemCount(): Int {
        return data!!.size
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        data?.get(position)?.let { holder.bindItem(it) }
    }


    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        @SuppressLint("SetTextI18n")
        fun bindItem(data: CategorySectionModel) {
            itemView.tv_category_name.text = data.categoryLabel
        }
    }

    override fun getFilter(): Filter? {
        return object : Filter() {
            override fun performFiltering(constraint: CharSequence): FilterResults {
                val results = FilterResults()
                if (constraint.isEmpty()) {
                    //no filter implemented we return full list
                    results.values = data
                    results.count = data!!.size
                } else {
                    //Here we perform filtering operation
                    val list: ArrayList<CategorySectionModel> = ArrayList()
                    for (p in data!!) {
                        if (p.categoryLabel.toUpperCase().startsWith(constraint.toString().toUpperCase())) list.add(p)
                    }
                    results.values = list
                    results.count = list.size
                }
                return results
            }

            override fun publishResults(constraint: CharSequence, results: FilterResults) {
                // Now we have to inform the adapter about the new list filtered
                if (results.count == 0 || constraint == "") {
                    data = originalList
                    notifyDataSetChanged()
                } else {
                    data = results.values as ArrayList<CategorySectionModel>?
                    notifyDataSetChanged()
                }
            }
        }
    }
}

回答by Parsania Hardik

You can implement search filter in listview by two ways. 1. using searchview 2. using edittext.

您可以通过两种方式在列表视图中实现搜索过滤器。1. 使用搜索视图 2. 使用编辑文本。

1. If yo want to use searchview then read here : searchview filter.

2. If you want to use edittext, read below.

1. 如果您想使用 searchview，请阅读此处：searchview 过滤器。

2. 如果您想使用 edittext，请阅读以下内容。

I have taken reference from : listview search filter android

我参考了：listview search filter android

Code snippets to make filter with edittext.

使用edittext进行过滤的代码片段。

First create model class MovieNames.java:

首先创建模型类 MovieNames.java：

public class MovieNames {
    private String movieName;

    public MovieNames(String movieName) {
        this.movieName = movieName;
    }

    public String getMovieName() {
        return this.movieName;
    }

}

Create listview_item.xml file :

创建 listview_item.xml 文件：

     <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp">


    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

Make ListViewAdapter.java class :

制作 ListViewAdapter.java 类：

    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<MovieNames> arraylist;

    public ListViewAdapter(Context context, ArrayList<MovieNames> 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 activity_main.xml file :

准备activity_main.xml文件：

    <?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.parsaniahardik.searchedit.MainActivity"
    android:orientation="vertical">


    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:hint="enter query"
        android:singleLine="true">


        <requestFocus/>
    </EditText>

    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/listView"
        android:divider="#694fea"
        android:dividerHeight="1dp" />


</LinearLayout>

Finally make MainActivity.java class :

最后制作 MainActivity.java 类：

    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<MovieNames> movieNamesArrayList;
    public static ArrayList<MovieNames> 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);

            }
        });

    }
}

回答by user6004521

First you create the EditText in the xml file and assign an id, eg con_pag_etPesquisa. After that, we will create two lists, where one is the list view and the other to receive the same content but will remain as a backup. Before moving objects to lists first initializes Them the below:

首先，您在 xml 文件中创建 EditText 并分配一个 id，例如 con_pag_etPesquisa。之后，我们将创建两个列表，其中一个是列表视图，另一个接收相同的内容，但将作为备份保留。在将对象移动到列表之前首先初始化它们如下：

//Declaring

public EditText etPesquisa;

public ContasPagarAdapter adapterNormal;

public List<ContasPagar> lstBkp;

public List<ContasPagar> 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<ContasPagar>();

lstBkp = new ArrayList<ContasPagar>();


//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<ContasPagar> novaLista){
    runOnUiThread(new Runnable(){

        @Override
            public void run(){
                adapterNormal.notifyDataSetChanged();               
            }
        });
    }

回答by varotariya vajsi

you can find custom list adapter class with filterable using text change in edit text...

您可以使用编辑文本中的文本更改找到可过滤的自定义列表适配器类...

create custom list adapter class with implementation of Filterable:

使用 Filterable 的实现创建自定义列表适配器类：

private class CustomListAdapter extends BaseAdapter implements Filterable{

    private LayoutInflater inflater;
    private ViewHolder holder;
    private ItemFilter mFilter = new ItemFilter();

    public CustomListAdapter(List<YourCustomData> 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<YourCustomData> list = YourObject.getYourDataList();

        int count = list.size();
        final ArrayList<YourCustomData> nlist = new ArrayList<YourCustomData>(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<YourCustomData>) 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) {
        }
    });

回答by MMagician

One thing I've noticed is that whenever you are editing the list (adding items for example) as well as filtering for it, then inside the @Override getViewmethod, you shouldn't use filteredData.get(position), as it throws an IndexOutOfBoundsexception.

我注意到的一件事是，每当您编辑列表（例如添加项目）以及对其进行过滤时，在@Override getView方法内部，您都不应该使用filteredData.get(position)，因为它会引发IndexOutOfBounds异常。

Instead, what worked for me, was using the getItem(position)method, which belongs to the ArrayAdapterclass.

相反，对我有用的是使用getItem(position)属于ArrayAdapter该类的方法。