带过滤器的自定义列表视图适配器Android

Question

请尝试在我的列表视图上实现过滤器。但每当文本更改时，列表就会消失。请帮忙这是我的代码。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;

}

 }

这是我尝试实现过滤器的另一个类。我有一个 edittext，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());
        }
    });
}


  

  }

日志，记录我输入的任何输入，但不显示列表视图。谢谢你

Answer 1

您可以使用适配器上的

Filterable

接口，请看下面的示例：

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();
        }
 
    }
}

在实例化适配器的 Activity 或 Fragment 中：

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) {
    }
});

这里是原始来源和另一个示例

的链接

Answer 2

我希望对其他人有帮助。

// 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();
}

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

适配器构造函数中的以下代码

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

以及您的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
        }
    });

Answer 3

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;
    }
}

}

您可以在这里获取完整教程：带有搜索/过滤器和 OnItemClickListener 的 ListView

Github源代码

Answer 4

请检查以下代码，它会对您有帮助

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);
}

Answer 5

如果你想在

kotlin

中使用自定义模型类实现过滤，那么你可以实现下面的代码。

第1步： 在您的

SearchView

文件中添加

xml

，然后在您的

activity

或

fragment

中实现

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
    }

我的模型类
CategorySectionModel
看起来像

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

现在我们必须处理适配器类，您需要实现

Filterable

接口并重写

getFilter()

方法，如下所示

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()
                }
            }
        }
    }
}

Answer 6

首先在 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保留作为备份。在将对象移动到列表之前，首先对它们进行初始化：

//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();               
            }
        });
    }

Answer 7

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 searchview 2. 使用 edittext。

如果您想使用searchview，请阅读此处：searchview 过滤器。
如果您想使用edittext，请阅读下文。

我参考了：listview搜索过滤器android

使用 edittext 进行过滤的代码片段。

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;
    }

}

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>

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;
    }


}

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>

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);

            }
        });

    }
}

Answer 8

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...

创建自定义列表适配器类并实现 Filterable：

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) {
        }
    });

Answer 9

我注意到的一件事是，每当您编辑列表（例如添加项目）以及过滤列表时，在

@Override getView

方法中，您不应该使用

filteredData.get(position)

，因为它会抛出

 IndexOutOfBounds

例外。

相反，对我有用的是使用

getItem(position)

方法，它属于

ArrayAdapter

类。

Answer 10

只是更新。

如果勾选的答案对您来说工作正常，但当搜索文本为空时它什么也不显示。解决办法如下：

private class ItemFilter extends Filter {
    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        
        String filterString = constraint.toString().toLowerCase();
        
        FilterResults results = new FilterResults();

        if(constraint.length() == 0)
        {
            results.count = originalData.size();
            results.values = originalData;
        }else {

        
        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();
      }

   }

对于以下任何疑问评论

Answer 11

更简单的解决方案是使用ArrayAdapter中已经存在的过滤器。您不必重新发明轮子。

如果您只是在自定义项目类（您的 Hymns 类）上添加 toString() 方法，当您调用 adapter.getFilter().filter(s) 时，它将使用该字符串进行搜索

如果您想修改它的搜索方式，那么您将不得不使用我认为更高级的方法之一，但对我来说这已经足够了。

带过滤器的自定义列表视图适配器Android

问题描述投票：0回答：11

11个回答

最新问题

带过滤器的自定义列表视图适配器Android

问题描述 投票：0回答：11

11个回答

最新问题

问题描述投票：0回答：11