Android 用EditText实现搜索框功能
16lz
2021-01-23
效果图
思路
为EditText添加TextChangedListener接口，在接口的afterTextChanged方法里面实现搜索功能
工程目录结构
1.MainActivity.java
import android.app.Activity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.ListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends Activity { private ListView listView; //列表 private SearchView searchView; //搜索框 private List data = new ArrayList<>(); //ListView数据源 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //获取控件 listView = (ListView) findViewById(R.id.listView); searchView = (SearchView) findViewById(R.id.searchView);// //设置延时搜索，延时2秒// searchView.setWaitTime(2000); //设置搜索方法 searchView.setSearchWay(new SearchView.SearchWay(){ @Override public List getData() { //返回数据源 return data; } @Override public boolean matchItem(String item, String s) { //如果串item中包含串s，则匹配 return item.contains(s); } @Override public void update(List resultList) { //更新ListView的数据 setListViewData(resultList); } }); initListView(); } /** * 初始化ListView */ private void initListView(){ //初始化字符数组 for (int i = 0; i < 20; i++){ data.add("第" + i + "项"); } //初始化ListView的内容 setListViewData(data); } /** * 设置ListView的内容 */ private void setListViewData(List list){ //设置ListView的适配器 ArrayAdapter adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, list); listView.setAdapter(adapter); }} 2.SearchView.java
import android.content.Context;import android.content.res.TypedArray;import android.os.Handler;import android.os.Message;import android.text.Editable;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.EditText;import android.widget.ImageView;import android.widget.LinearLayout;import java.util.ArrayList;import java.util.List;/** * Created by Administrator on 2016/8/31. * 搜索框 */public class SearchView extends LinearLayout implements TextWatcher{ private EditText et_search; //输入框 private ImageView iv_clear; //删除图标 private SearchWay mSearch; //匹配方法 private String searchText; //改变后的文字 private WaitThread waitThread; //等待线程 private int waitTime = 200; //延时搜索时间，默认200ms private int curTime; //当前延时时间 private Handler mHandler; public SearchView(Context context, AttributeSet attrs) { super(context, attrs); //加载布局文件 View view = LayoutInflater.from(context).inflate(R.layout.view_search, null); //获取控件 et_search = (EditText) view.findViewById(R.id.et_search); iv_clear = (ImageView) view.findViewById(R.id.iv_clear); //设置清空按钮的触发器 iv_clear.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { et_search.setText(""); } }); //读取属性 TypedArray typed = context.obtainStyledAttributes(attrs, R.styleable.SearchView); String s; //文字大小 float textSize = typed.getDimension(R.styleable.SearchView_sv_textSize, 15); et_search.setTextSize(textSize); //搜索框文字 s = typed.getString(R.styleable.SearchView_sv_text); if (s != null){ et_search.setText(s); } //提示文字 s = typed.getString(R.styleable.SearchView_sv_hint); if (s != null){ et_search.setHint(s); } //是否隐藏搜索图标 boolean hideImg = typed.getBoolean(R.styleable.SearchView_sv_hideImg, false); if (hideImg) { view.findViewById(R.id.img_search).setVisibility(GONE); } //回收资源 typed.recycle(); //文字改变监听 et_search.addTextChangedListener(this); //异步处理 mHandler = new Handler(){ @Override public void handleMessage(Message msg) { //更新回调接口 if (0 == msg.what){ waitThread = null; //匹配结果回调 List searchList = new ArrayList(); List list = mSearch.getData(); if (list != null) { for (Object o : list) { if (mSearch.matchItem(o, searchText)) { searchList.add(o); } } mSearch.update(searchList); } } } }; //把布局添加到当前控件中 ViewGroup.LayoutParams params = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); addView(view, params); } /** * 设置匹配数据的方法 */ public void setSearchWay(SearchWay search){ mSearch = search; } /** * 获取搜索框的文字 */ public String getText(){ return et_search.getText().toString(); } public SearchWay getSearchWay() { return mSearch; } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void afterTextChanged(Editable s) { //删除图标 if (s.toString().isEmpty()){ iv_clear.setVisibility(GONE); }else { iv_clear.setVisibility(VISIBLE); } if (mSearch != null) { if (null == waitThread) { waitThread = new WaitThread(); waitThread.start(); } else { //搜索框的文字发生变化就重置等待时间 if (!searchText.equals(s.toString())) { curTime = 0; } } } searchText = s.toString(); } /** * 设置搜索延时时间 * @param waitTime 毫秒，精度为100ms */ public void setWaitTime(int waitTime){ this.waitTime = waitTime; } /** * 延时搜索的线程 */ private class WaitThread extends Thread{ @Override public void run() { //等待延时 for (curTime = 0; curTime < waitTime; curTime += 100){ try { Thread.sleep(100); }catch (InterruptedException e){ e.printStackTrace(); } } mHandler.sendEmptyMessage(0); } } /** * 用于匹配项 */ public static abstract class SearchWay{ /** * @return 数据源 */ public abstract List getData(); /** * @return item中是否包含有s */ public abstract boolean matchItem(T item, String s); /** * 更新列表 * @param resultList 匹配的数据，重新加载到列表 */ public abstract void update(List resultList); }} 3.activity_main.xml
<?xml version="1.0" encoding="utf-8"?> 4.view_search.xml
<?xml version="1.0" encoding="utf-8"?>
<?xml version="1.0" encoding="utf-8"?> 6. cleartext.png
7.search.png
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