android edittext+listview进阶 实现搜索listview中的内容 定制自己的过滤器

上一次直接使用的是arrayadapter 以及 系统自带的simple_list1布局文件.但是开发中,我们基本是不会用到那么简单的cell的,下面就来说说如何定制自己的过滤器,让他想搜索什么内容就搜索什么内容

效果图:

listview_cell布局:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <ImageView        android:id="@+id/iv_logo"        android:layout_width="wrap_content"        android:layout_height="50dp"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:src="@drawable/ic_launcher" />    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="50dp"        android:orientation="vertical" >        <TextView            android:id="@+id/tv_name"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="name"            android:layout_weight="1" />        <TextView            android:id="@+id/tv_show"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="我就是我不一样的烟火"            android:layout_weight="1" />    </LinearLayout></LinearLayout>

activity_main布局:

xml:

<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:orientation="vertical"    tools:context="com.example.testedittextlistview.MainActivity" >    <include layout="@layout/myedittext" />    <ListView        android:id="@+id/lv_main"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="#000" >    </ListView></LinearLayout>

listview_adapter:

package com.example.testedittextlistview;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import android.content.Context;import android.text.TextUtils;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Filter;import android.widget.ImageView;import android.widget.TextView;public class MyListViewAdapter extends BaseAdapter {//这个是我们数据的总集合,在过滤的时候,这个应该是不变的private List<People> myforeverlist;//上下文菜单private Context context;//这个是,过滤的时候记载满足要求的那些数据的集合private List<People> mFilteredArrayList;//这个是,需要设置给adapter的private List<People> myPeopleList;public MyListViewAdapter(Context context, List<People> list) {this.context = context;this.myforeverlist = list;//这个时候把我们的一些中间变量给初始化一下mFilteredArrayList = new ArrayList<People>();myPeopleList = new ArrayList<People>();//把我们传递过来的数据,弄到这个集合里面.保存原始集合的完整性myPeopleList.addAll(myforeverlist);}@Overridepublic int getCount() {return myPeopleList.size();}@Overridepublic People getItem(int position) {return myPeopleList.get(position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubif(convertView==null) {vHolder = new viewHolder();convertView = View.inflate(context, R.layout.listview_cell, null);vHolder.iv_logo = (ImageView) convertView.findViewById(R.id.iv_logo);vHolder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);vHolder.tv_show = (TextView) convertView.findViewById(R.id.tv_show);convertView.setTag(vHolder);} else {vHolder = (viewHolder) convertView.getTag();}//vHolder.iv_logo.setImageResource(resId);vHolder.tv_name.setText(getItem(position).getName());vHolder.tv_show.setText(getItem(position).getShow());return convertView;}private viewHolder vHolder;class viewHolder{public ImageView iv_logo;public TextView tv_name;public TextView tv_show;}private NameFilter nameFilter;public NameFilter getFilter() {if(nameFilter==null) {nameFilter = new NameFilter();}return nameFilter;}// 过滤数据class NameFilter extends Filter {// 执行筛选@Overrideprotected FilterResults performFiltering(CharSequence charSequence) {FilterResults filterResults = new FilterResults();if (TextUtils.isEmpty(charSequence)) {mFilteredArrayList.clear();// 清除一下filterResults.values = myforeverlist;return filterResults;} else {mFilteredArrayList.clear();// 清除一下for (Iterator<People> iterator = myforeverlist.iterator(); iterator.hasNext();) {People name = iterator.next();if (name.getName().contains(charSequence)) {mFilteredArrayList.add(name);}}filterResults.values = mFilteredArrayList;return filterResults;}}// 筛选结果@Overrideprotected void publishResults(CharSequence arg0, FilterResults results) {myPeopleList = (ArrayList<People>) results.values;if (results.count > 0) {notifyDataSetChanged();} else {notifyDataSetInvalidated();}}}}

activity_main.java:

package com.example.testedittextlistview;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.text.Editable;import android.text.TextWatcher;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.WindowManager;import android.view.View.OnClickListener;import android.view.inputmethod.InputMethodManager;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.EditText;import android.widget.ImageButton;import android.widget.ListView;import android.widget.Toast;public class MainActivity extends Activity {private EditText query;private ImageButton search_clear;private ListView lv_main;//控制输入框显示隐藏的代码private InputMethodManager inputMethodManager;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();}private void initView() {inputMethodManager=  (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);query = (EditText) findViewById(R.id.query);search_clear = (ImageButton) findViewById(R.id.search_clear);search_clear.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//点击一下清空内容咯query.getText().clear();hideSoftKeyboard();//隐藏键盘}});//listview初始化控件并丰富一些内容lv_main = (ListView) findViewById(R.id.lv_main);List<People> list = new ArrayList<People>();for(int i=1;i<10;i++) {People tPeople = new People();if(i<4) {//让内容稍微不一样点tPeople.setName("Test"+i);tPeople.setShow("今夜不回家"+i);} else {tPeople.setName("HAHA"+i);tPeople.setShow("Love tonight"+i);}list.add(tPeople);}final MyListViewAdapter adapter = new MyListViewAdapter(getApplicationContext(), list);lv_main.setAdapter(adapter);// 为listview添加点击事件lv_main.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {// 这里注意使用的是adapter.getItem(position)// ,而不是myString[position],如果使用第二种的话,效果很坑哟Toast.makeText(getApplicationContext(),"点击了" + adapter.getItem(position).getName(), Toast.LENGTH_SHORT).show();}});// 为edittext添加内容改变的监听,onTextChanged 里面让adapter,设置过滤的条件query.addTextChangedListener(new TextWatcher() {@Overridepublic void onTextChanged(CharSequence s, int start, int before,int count) {adapter.getFilter().filter(s);if(s.length()>0) { search_clear.setVisibility(View.VISIBLE);} else {search_clear.setVisibility(View.GONE);}}// 下面两个方法可以直接无视@Overridepublic void beforeTextChanged(CharSequence s, int start, int count,int after) {}@Overridepublic void afterTextChanged(Editable s) {}});}/** * 隐藏输入法的示例代码 */void hideSoftKeyboard() {if (getWindow().getAttributes().softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN) {if (getCurrentFocus() != null)inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),InputMethodManager.HIDE_NOT_ALWAYS);}}}