基于SearchView实时搜索结果
16lz
2021-01-26
基于Android ActionBar的SearchView实时搜索结果
本篇文章则是在《Android AppCompatActivity的ActionBar之SearchView、ShareActionProvider以及menu》基础上的进一步加深,裁剪掉了前文中和搜索无关的内容,集中在搜索功能相关的代码部分,代码实现一个小demo,说明如何基于Android ActionBar的SearchView实时搜索结果。这在实际的开发任务中很有用,比如现在常见的通讯录开发,搜素联系人是不可或缺的一项功能,这一项功能和本文的搜索实现原理相同,故可以举一反三触类旁通。
测试用的主Activity,MainActivity.java:
- package zhangphil.toolbar;
- import java.util.ArrayList;
- import android.content.Context;
- import android.os.Bundle;
- import android.support.v4.view.MenuItemCompat;
- import android.support.v7.app.ActionBar;
- import android.support.v7.app.AppCompatActivity;
- import android.support.v7.widget.SearchView;
- import android.support.v7.widget.SearchView.OnQueryTextListener;
- import android.view.LayoutInflater;
- import android.view.Menu;
- import android.view.MenuItem;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.ArrayAdapter;
- import android.widget.ListView;
- import android.widget.TextView;
- import android.widget.Toast;
- public class MainActivity extends AppCompatActivity {
- private MyAdapter adapter;
- // 初始化的数据
- private ArrayList
rawData; - // 用户搜索结果的集合
- private ArrayList
searchResult; - @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- ActionBar ab = this.getSupportActionBar();
- ab.setDisplayHomeAsUpEnabled(true);
- setContentView(R.layout.activity_main);
- // 初始化一个测试数据集。
- rawData = new ArrayList
(); - for (int i = 0; i < 100; i++) {
- rawData.add(i + "");
- }
- ListView listView = (ListView) findViewById(R.id.listView);
- adapter = new MyAdapter(this, -1);
- listView.setAdapter(adapter);
- // 设置数据源并更新
- adapter.updateDataSource(rawData);
- // 初始化一个用以装载搜索结果的ArrayList。
- searchResult = new ArrayList
(); - }
- private class MyAdapter extends ArrayAdapter
{ - private LayoutInflater inflater;
- private ArrayList
data; - public MyAdapter(Context context, int resource) {
- super(context, resource);
- inflater = LayoutInflater.from(context);
- data = new ArrayList
(); - }
- // 更新数据并notifyDataSetChanged
- public void updateDataSource(ArrayList
data) { - this.data = data;
- this.notifyDataSetChanged();
- }
- @Override
- public View getView(int position, View convertView, ViewGroup parent) {
- if (convertView == null)
- convertView = inflater.inflate(android.R.layout.simple_list_item_1, null);
- TextView text = (TextView) convertView.findViewById(android.R.id.text1);
- text.setText(getItem(position));
- return convertView;
- }
- @Override
- public String getItem(int pos) {
- return data.get(pos);
- }
- @Override
- public int getCount() {
- return data.size();
- }
- }
- @Override
- public boolean onCreateOptionsMenu(Menu menu) {
- getMenuInflater().inflate(R.menu.main, menu);
- MenuItem searchItem = menu.findItem(R.id.search);
- SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
- // 核心是利用SearchView此事件监听用户在搜索框中的输入文字变化,同时根据用户实时输入的文字立即返回相应的搜索结果。
- searchView.setOnQueryTextListener(new OnQueryTextListener() {
- @Override
- public boolean onQueryTextChange(String queryText) {
- // Toast.makeText(getApplicationContext(), "onQueryTextChange:"
- // + queryText, Toast.LENGTH_SHORT).show();
- // 每一次搜索前要清空上一次搜素的结果。
- searchResult.clear();
- // 将原始数据中符合搜索条件的结果装入searchResult
- for (int i = 0; i < rawData.size(); i++) {
- if (rawData.get(i).contains(queryText))
- searchResult.add(rawData.get(i));
- }
- // 实时更新数据源。实时返回搜索结果。
- adapter.updateDataSource(searchResult);
- return true;
- }
- @Override
- public boolean onQueryTextSubmit(String queryText) {
- Toast.makeText(getApplicationContext(), "onQueryTextSubmit:" + queryText, Toast.LENGTH_SHORT).show();
- return true;
- }
- });
- return super.onCreateOptionsMenu(menu);
- }
- }
package zhangphil.toolbar;import java.util.ArrayList;import android.content.Context;import android.os.Bundle;import android.support.v4.view.MenuItemCompat;import android.support.v7.app.ActionBar;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.SearchView;import android.support.v7.widget.SearchView.OnQueryTextListener;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends AppCompatActivity {private MyAdapter adapter;// 初始化的数据private ArrayList rawData;// 用户搜索结果的集合private ArrayList searchResult;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);ActionBar ab = this.getSupportActionBar();ab.setDisplayHomeAsUpEnabled(true);setContentView(R.layout.activity_main);// 初始化一个测试数据集。rawData = new ArrayList();for (int i = 0; i < 100; i++) {rawData.add(i + "");}ListView listView = (ListView) findViewById(R.id.listView);adapter = new MyAdapter(this, -1);listView.setAdapter(adapter);// 设置数据源并更新adapter.updateDataSource(rawData);// 初始化一个用以装载搜索结果的ArrayList。searchResult = new ArrayList();}private class MyAdapter extends ArrayAdapter {private LayoutInflater inflater;private ArrayList data;public MyAdapter(Context context, int resource) {super(context, resource);inflater = LayoutInflater.from(context);data = new ArrayList();}// 更新数据并notifyDataSetChangedpublic void updateDataSource(ArrayList data) {this.data = data;this.notifyDataSetChanged();}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {if (convertView == null)convertView = inflater.inflate(android.R.layout.simple_list_item_1, null);TextView text = (TextView) convertView.findViewById(android.R.id.text1);text.setText(getItem(position));return convertView;}@Overridepublic String getItem(int pos) {return data.get(pos);}@Overridepublic int getCount() {return data.size();}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main, menu);MenuItem searchItem = menu.findItem(R.id.search);SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);// 核心是利用SearchView此事件监听用户在搜索框中的输入文字变化,同时根据用户实时输入的文字立即返回相应的搜索结果。searchView.setOnQueryTextListener(new OnQueryTextListener() {@Overridepublic boolean onQueryTextChange(String queryText) {// Toast.makeText(getApplicationContext(), "onQueryTextChange:"// + queryText, Toast.LENGTH_SHORT).show();// 每一次搜索前要清空上一次搜素的结果。searchResult.clear();// 将原始数据中符合搜索条件的结果装入searchResultfor (int i = 0; i < rawData.size(); i++) {if (rawData.get(i).contains(queryText))searchResult.add(rawData.get(i));}// 实时更新数据源。实时返回搜索结果。adapter.updateDataSource(searchResult);return true;}@Overridepublic boolean onQueryTextSubmit(String queryText) {Toast.makeText(getApplicationContext(), "onQueryTextSubmit:" + queryText, Toast.LENGTH_SHORT).show();return true;}});return super.onCreateOptionsMenu(menu);}}
MainActivity.java需要的布局文件activity_main.xm:
[html] view plain copy print ?- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- xmlns:app="http://schemas.android.com/apk/res/zhangphil.toolbar"
- android:layout_width="match_parent"
- android:layout_height="match_parent" >
- <ListView
- android:id="@+id/listView"
- android:layout_width="match_parent"
- android:layout_height="match_parent" >
- ListView>
- RelativeLayout>
res/menu/目录下的main.xml:
- <menu xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:app="http://schemas.android.com/apk/res-auto"
- xmlns:tools="http://schemas.android.com/tools" >
- <item
- android:id="@+id/search"
- android:title="搜索"
- app:actionViewClass="android.support.v7.widget.SearchView"
- app:showAsAction="ifRoom|collapseActionView"/>
- menu>
代码运行后,搜索功能展示:
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