Android 使用 customlitview 的 actionbar 搜索

Question

我是 android 的新手 development.I 使用 Arrayadopter 自定义列表视图我的所有数据都来自 sqlite 数据库并在此自定义列表视图中显示我如何在我的操作栏上实现搜索功能我尝试了许多其他代码但它在这里不起作用我请告诉我是否有经验的开发人员可以帮助我非常感谢他提前请告诉我？

My custom list adopter:

    package bible.swordof.God;

    import android.app.Activity;
    import android.content.Context;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ArrayAdapter;
    import android.widget.ImageView;
    import android.widget.TextView;

    import com.amulyakhare.textdrawable.TextDrawable;
    import com.amulyakhare.textdrawable.util.ColorGenerator;

    import java.util.ArrayList;
    import java.util.List;
    import java.util.Locale;

    public class ListViewAdapter extends ArrayAdapter<String> {
        private MainActivity activity;
        private List<String> friendList;
        private List<String> searchList;



        public ListViewAdapter(MainActivity context, int resource, List<String> objects) {
            super(context, resource, objects);
            this.activity = context;
            this.friendList = objects;
            this.searchList = new ArrayList<>();
            this.searchList.addAll(friendList);
        }



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

        @Override
        public String getItem(int position) {

            return friendList.get(position);


        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            // If holder not exist then locate all view from UI file.
            if (convertView == null) {
                // inflate UI from XML file
                convertView = inflater.inflate(R.layout.item_listview, parent, false);
                // get all UI view
                holder = new ViewHolder(convertView);
                // set tag for holder
                convertView.setTag(holder);
            } else {
                // if holder created, get tag from view
                holder = (ViewHolder) convertView.getTag();
            }

            holder.friendName.setText(getItem(position));



            //get first letter of each String item
            String firstLetter = String.valueOf(getItem(position).substring(0,1));


            ColorGenerator generator = ColorGenerator.MATERIAL; // or use DEFAULT
            // generate random color
            int color = generator.getColor(getItem(position));

            TextDrawable drawable = TextDrawable.builder()
                    .buildRound(firstLetter, color); // radius in px



            holder.imageView.setImageDrawable(drawable);



            return convertView;
        }

        public void filter(String charText) {
            charText = charText.toLowerCase(Locale.getDefault());
            friendList.clear();
            if (charText.length() == 0) {
                friendList.addAll(searchList);
            } else {
                for (String s : searchList) {
                    if (s.toLowerCase(Locale.getDefault()).contains(charText)) {
                        friendList.add(s);
                    }
                }
            }
            notifyDataSetChanged();
        }

        private class ViewHolder {
            private ImageView imageView;
            private TextView friendName;

            public ViewHolder(View v) {
                imageView = (ImageView) v.findViewById(R.id.image_view);
                friendName = (TextView) v.findViewById(R.id.text);
            }
        }

        }

My Mainactivity where i implement search bar:


package bible.swordof.God;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.view.MenuInflater;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.app.SearchManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SearchView.OnQueryTextListener;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;
import android.os.Bundle;
import android.support.v7.app.ActionBar;
import java.util.ArrayList;
import java.util.Locale;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
    private ListView listView;
    private ArrayList<String> stringArrayList;
    private ArrayAdapter<String> adapter;
    private DatabaseHelper mDBHelper=null;
    private SQLiteDatabase mDb=null;

//life is awesome

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar=(Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);


        setData();
        listView =findViewById(R.id.list);
        adapter = new ListViewAdapter(MainActivity.this, R.layout.item_listview, stringArrayList);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                 int booknumber=position+1;
                 String  bookname=stringArrayList.get(position);

                //Toast.makeText(MainActivity.this, ""+booknumber, Toast.LENGTH_SHORT).show();

                Intent intent=new Intent(MainActivity.this,Chapters.class);

                intent.putExtra("booknumber",booknumber);

                intent.putExtra("bookname",bookname);

                startActivity(intent);



            }
        });
    }



    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()){
            case R.id.search_voice_btn:
                Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
                if (intent.resolveActivity(getPackageManager()) != null) {
                    startActivityForResult(intent, 10);
                } else {
                    Toast.makeText(this, "Your Device Don't Support Speech Input", Toast.LENGTH_SHORT).show();
                }




                break;
        }
        return super.onOptionsItemSelected(item);
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        switch (requestCode) {
            case 10:
                if (resultCode == RESULT_OK && data != null) {

                    ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);



                    Toast.makeText(this, ""+result.get(0), Toast.LENGTH_SHORT).show();



                }
                break;
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        MenuInflater inflater=getMenuInflater();

    inflater.inflate(R.menu.main,menu);
    MenuItem menuItem=menu.findItem(R.id.action_search);




        SearchView searchView=(SearchView)menuItem.getActionView();



        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                return false;



            }

            @Override
            public boolean onQueryTextChange(String newText) {
                if (TextUtils.isEmpty(newText)) {
                   adapter.getFilter().filter(newText);
                    listView.clearTextFilter();

                } else {
                    adapter.getFilter().filter(newText);
                }

                return true;


            }
        });

    return  true;
    }


    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        Fragment fragment;
        int id = item.getItemId();


        if (id == R.id.nav_camera) {





        } else if (id == R.id.favoruite)
        {
         Intent intent=new Intent(this,Favourite.class);

         startActivity(intent);
        }  else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

    private void setData() {


        stringArrayList = new ArrayList<>();

        mDBHelper = new DatabaseHelper(this);
        mDb = mDBHelper.getReadableDatabase();

        Cursor cursor = mDb.rawQuery("select * from key_english", new String[]{});


        if(cursor!=null && cursor.getCount() > 0)
        {
            if (cursor.moveToFirst())
            {
                do {
                    stringArrayList.add(cursor.getString(1));
                } while (cursor.moveToNext());
            }
        }
            }


            }



My action search menu:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/action_search"
        android:title="@string/search"
        android:icon="@android:drawable/ic_menu_search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="always" />

    <item
        android:id="@+id/search_voice_btn"
        android:icon="@drawable/ic_mic"
        app:showAsAction="always"
        android:title="Voice Search" />
</menu>

Answer 1

对于您的适配器，您创建了一个名为 filter 的 public 方法，它不是真正的 Filter class.我建议使用 2 种不同的方法来使发布的代码正常工作。

方法一：在Activity中，将adapter.getFilter().filter(newText);改为adapter.filter(newText);。

方法 2：由于您的数据是 String 列表并且 ArrayAdapter 已经是 Filterable，所以保留 adapter.getFilter().filter(newText); 并且只是使适配器像这样简单：

public class ListViewAdapter extends ArrayAdapter {
private MainActivity activity;

public ListViewAdapter(MainActivity context, int resource, List<String> objects) {
    super(context, resource, objects);
    this.activity = context;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    // If holder not exist then locate all view from UI file.
    if (convertView == null) {
        // inflate UI from XML file
        convertView = inflater.inflate(R.layout.item_listview, parent, false);
        // get all UI view
        holder = new ViewHolder(convertView);
        // set tag for holder
        convertView.setTag(holder);
    } else {
        // if holder created, get tag from view
        holder = (ViewHolder) convertView.getTag();
    }

    String item = (String)getItem(position);
    holder.friendName.setText(item);
    //get first letter of each String item
    String firstLetter = item.substring(0, 1);
    ColorGenerator generator = ColorGenerator.MATERIAL; // or use DEFAULT
    // generate random color
    int color = generator.getColor(item);
    TextDrawable drawable = TextDrawable.builder()
            .buildRound(firstLetter, color); // radius in px
    holder.imageView.setImageDrawable(drawable);
    return convertView;
}

private class ViewHolder {
    private ImageView imageView;
    private TextView friendName;

    public ViewHolder(View v) {
        imageView = (ImageView) v.findViewById(R.id.image_view);
        friendName = (TextView) v.findViewById(R.id.text);
    }
}

}

我在 ListView 上的博客也包含带有过滤器的示例：http://programandroidlistview.blogspot.com/希望对您有所帮助！

Android 使用 customlitview 的 actionbar 搜索

Android actionbar Search with customlitview

java

android

android-listview

searchbar

android-search