我的Android进阶之旅------>Android二级ListView列表的实现
实现例如以下图所看到的的二级列表效果
首先是在布局文件里，布局两个ListView,代码例如以下：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<ListView
android:id="@+id/listView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#e4e3de"
android:choiceMode="singleChoice"
android:divider="@drawable/listitem_divide"
android:listSelector="#00000000"
android:scrollbars="none" >
</ListView>
<ListView
android:id="@+id/subListView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:background="#e4e3de"
android:divider="@drawable/listitem_divide" >
</ListView>
</LinearLayout>接着给两个ListView分别写适配器，父类ListView适配器为MyListAdapter，子类ListView适配器为MySubListAdapter。代码例如以下：
/src/com/oyp/multilistview/MyListAdapter.java
package com.oyp.multilistview;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MyListAdapter extends BaseAdapter {
Context context;
LayoutInflater inflater;
String[] categories;
int last_item;
private int selectedPosition = -1;
public MyListAdapter(Context context, String[] categories) {
this.context = context;
this.categories = categories;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return categories.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.mylist_item, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView
.findViewById(R.id.textView);
holder.layout = (LinearLayout) convertView
.findViewById(R.id.colorlayout);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
if (selectedPosition == position) {
holder.textView.setTextColor(Color.WHITE);
holder.layout.setBackgroundColor(Color.TRANSPARENT);
} else {
holder.textView.setTextColor(Color.BLUE);
holder.layout.setBackgroundColor(Color.LTGRAY);
}
holder.textView.setText(categories[position]);
holder.textView.setTextColor(Color.BLACK);
return convertView;
}
public static class ViewHolder {
public TextView textView;
public LinearLayout layout;
}
public void setSelectedPosition(int position) {
selectedPosition = position;
}
}
相应的item布局文件为：/res/layout/mylist_item.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/colorlayout" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="8dip" android:layout_marginLeft="8dip" android:layout_marginTop="8dip" android:textSize="16dip" /> </LinearLayout>
/src/com/oyp/multilistview/MySubListAdapter.java
package com.oyp.multilistview;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class MySubListAdapter extends BaseAdapter {
Context context;
LayoutInflater layoutInflater;
String[][] sub_categories;
public int categoryPoition;
public MySubListAdapter(Context context, String[][] sub_categories, int position) {
this.context = context;
this.sub_categories = sub_categories;
layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.categoryPoition = position;
}
@Override
public int getCount() {
return sub_categories.length;
}
@Override
public Object getItem(int position) {
return getItem(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.mysublist_item, null);
viewHolder = new ViewHolder();
viewHolder.textView = (TextView) convertView
.findViewById(R.id.subTextView);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.textView.setText(sub_categories[categoryPoition][position]);
viewHolder.textView.setTextColor(Color.BLACK);
return convertView;
}
public static class ViewHolder {
public TextView textView;
}
}
相应的item布局文件为：/res/layout/mysublist_item.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/subTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="8dip" android:layout_marginLeft="8dip" android:layout_marginTop="8dip" android:textSize="16dip" /> </LinearLayout>
最后是Activity的实现，代码例如以下：
/src/com/oyp/multilistview/MainActivity.java
package com.oyp.multilistview;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class MainActivity extends Activity {
private ListView listView;
private ListView subListView;
private MyListAdapter myAdapter;
private MySubListAdapter subAdapter;
String sub_categories[][] = new String[][] {
new String[] { "所有美食", "本帮江浙菜", "川菜", "粤菜", "湘菜", "东北菜", "台湾菜",
"新疆/清真", "素菜", "火锅", "自助餐", "小吃快餐", "日本", "韩国料理", "东南亚菜",
"西餐", "面包甜点", "其它" },
new String[] { "所有休闲娱乐", "咖啡厅", "酒吧", "茶馆", "KTV", "电影院", "游乐游艺",
"公园", "景点/郊游", "洗浴", "足浴按摩", "文化艺术", "DIY手工坊", "桌球馆",
"桌面游戏", "很多其它休闲娱乐" },
new String[] { "所有购物", "综合商场", "服饰鞋包", "运动户外", "珠宝饰品", "化妆品",
"数码家电", "亲子购物", "家居建材", "书店", "书店", "眼镜店", "特色集市",
"很多其它购物场所", "食品茶酒", "超市/便利店", "药店" },
new String[] { "所有酒店", "经济型酒店", "豪华酒店", "度假酒店", "公寓式酒店",
"客栈/青旅/民宿", "主题精品酒店", " 温泉酒店", "亲子酒店" },
new String[] { "所有丽人", "美发", "美容/SPA", "美甲", "瘦身纤体", "个性写真",
"瑜伽/舞蹈", "其它" },
new String[] { "所有亲子", "亲子游乐", "亲子摄影", "幼儿教育", "主题公园/游乐场",
"展览/演出/赛事", "景点郊游", "DIY手工", "农家乐" },
new String[] { "所有生活", "商场购物劵", "汽车服务", "鲜花婚庆", "体检保健", "宠物服务",
"家政服务", "照片冲印", "配眼镜" },
};
String categories[] = new String[] { "美食", "休闲娱乐", "购物", "酒店", "丽人", "亲子",
"生活服务" };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
subListView = (ListView) findViewById(R.id.subListView);
myAdapter = new MyListAdapter(getApplicationContext(), categories);
listView.setAdapter(myAdapter);
setSubList(0);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
setSubList(position);
}
});
}
public void setSubList(int position) {
final int location = position;
myAdapter.setSelectedPosition(position);
myAdapter.notifyDataSetInvalidated();
subAdapter = new MySubListAdapter(getApplicationContext(), sub_categories,
position);
subListView.setAdapter(subAdapter);
subListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),
sub_categories[location][position], Toast.LENGTH_SHORT)
.show();
}
});
}
}
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作者：欧阳鹏 欢迎转载，与人分享是进步的源泉！
转载请保留原文地址：http://blog.csdn.net/ouyang_peng
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