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);
}
@Override
public int getCount() {
return myPeopleList.size();
}
@Override
public People getItem(int position) {
return myPeopleList.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if(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
@Override
protected 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
@Override
protected 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;
@Override
protected 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() {
@Override
public 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() {
@Override
public 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() {
@Override
public 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
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public 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);
}
}
}
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时间： 2024-10-12 23:57:11