使用customlitview的java Android actionbar搜索
我是安卓开发新手。我有使用Arrayadopter的自定义listview我的所有数据都是来自sqlite数据库的fecth,并在这个自定义listview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,但在这里不起作用我的请告诉我是否有经验的开发人员可以帮助我非常感谢他,请提前告诉我我
My custom list adopter:
package bible.swordof.God;
import 安卓.app.Activity;
import 安卓.content.Context;
import 安卓.view.LayoutInflater;
import 安卓.view.View;
import 安卓.view.ViewGroup;
import 安卓.widget.ArrayAdapter;
import 安卓.widget.ImageView;
import 安卓.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 安卓.app.Activity;
import 安卓.content.Intent;
import 安卓.database.Cursor;
import 安卓.database.sqlite.SQLiteDatabase;
import 安卓.os.Bundle;
import 安卓.speech.RecognizerIntent;
import 安卓.support.design.widget.FloatingActionButton;
import 安卓.support.design.widget.Snackbar;
import 安卓.support.v4.app.Fragment;
import 安卓.support.v4.app.FragmentManager;
import 安卓.support.v4.app.FragmentTransaction;
import 安卓.support.v7.widget.SearchView;
import 安卓.support.v7.widget.Toolbar;
import 安卓.text.TextUtils;
import 安卓.view.MenuInflater;
import 安卓.view.View;
import 安卓.support.design.widget.NavigationView;
import 安卓.support.v4.view.GravityCompat;
import 安卓.support.v4.widget.DrawerLayout;
import 安卓.support.v7.app.ActionBarDrawerToggle;
import 安卓.support.v7.app.AppCompatActivity;
import 安卓.view.Menu;
import 安卓.view.MenuItem;
import 安卓.app.SearchManager;
import 安卓.widget.AdapterView;
import 安卓.widget.ArrayAdapter;
import 安卓.widget.ListView;
import 安卓.widget.SearchView.OnQueryTextListener;
import 安卓.widget.SimpleCursorAdapter;
import 安卓.widget.Toast;
import 安卓.os.Bundle;
import 安卓.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:安卓="http://schemas.安卓.com/apk/res/安卓"
xmlns:app="http://schemas.安卓.com/apk/res-auto">
<item
安卓:id="@+id/action_search"
安卓:title="@string/search"
安卓:icon="@安卓:drawable/ic_menu_search"
app:actionViewClass="安卓.support.v7.widget.SearchView"
app:showAsAction="always" />
<item
安卓:id="@+id/search_voice_btn"
安卓:icon="@drawable/ic_mic"
app:showAsAction="always"
安卓:title="Voice Search" />
</menu>
# 1 楼答案
对于适配器,您创建了一个名为filter的公共方法,它不是真正的filter类。我建议使用两种不同的方法来实现发布的代码
方法1:在活动中,将:
adapter.getFilter().filter(newText);
更改为adapter.filter(newText);
方法2:由于您的数据是一个字符串列表,而ArrayAdapter已经是可过滤的,所以请保持
adapter.getFilter().filter(newText);
,并使适配器简单如下:我在ListView上的博客还包含了一些带有过滤器的示例:http://programandroidlistview.blogspot.com/希望对你有所帮助