对于Listview的分组我们再熟悉不过了，因为Android自带的通讯录中的联系人信息就是使用的ListView分组，最近项目中用到了这个功能。所以趁着周末有时间，也更新下一篇这样的博客，希望对大家能够有帮助。
其实对于分组的ListView和我们平时用的ListView没有多大差别，就是需要在适配器中的getView方法中做下判断。只要理解了这个，下面就好说了，下面我们看下实现代码。
首先是main.xml布局：
[html] <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
android:orientation="vertical" >
<ListView
android:id="@+id/listView_list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
android:orientation="vertical" >
<ListView
android:id="@+id/listView_list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
因为listview要加载两种不同的item，所以要实现两个item布局，addexam_list_item.xml：
[html] <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="5dip">
<ImageView
android:id="@+id/addexam_list_icon"
android:background="@drawable/ic_launcher"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/addexam_list_item_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:text="测试数据"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="5dip">
<ImageView
android:id="@+id/addexam_list_icon"
android:background="@drawable/ic_launcher"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/addexam_list_item_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:text="测试数据"/>
</LinearLayout>
分组标签对应的布局addexam_list_item_tag.xml
[html] <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#666666"
android:paddingLeft="10dp"
android:gravity="center_vertical"
android:orientation="vertical" >
<TextView
android:id="@+id/addexam_list_item_text"
android:layout_width="wrap_content"
android:layout_height="20dip"
android:textColor="#ffffff"
android:text="金融考试"
android:gravity="center_vertical"/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#666666"
android:paddingLeft="10dp"
android:gravity="center_vertical"
android:orientation="vertical" >
<TextView
android:id="@+id/addexam_list_item_text"
android:layout_width="wrap_content"
android:layout_height="20dip"
android:textColor="#ffffff"
android:text="金融考试"
android:gravity="center_vertical"/>
</LinearLayout>
布局文件我们已经实现了，下面看下在程序中我们是怎么处理的吧！
[html] public class TestActivity extends Activity {
/** Called when the activity is first created. */
private List<String>list=null;
private List<String> groupkey=new ArrayList<String>();
private List<String> aList = new ArrayList<String>();
private List<String> bList = new ArrayList<String>();
private ListView listview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listview=(ListView) findViewById(R.id.listView_list);
initData();
MyAdapter adapter=new MyAdapter();
listview.setAdapter(adapter);
}
public void initData(){
list = new ArrayList<String>();
groupkey.add("A组");
groupkey.add("B组");
for(int i=0; i<5; i++){
aList.add("A组"+i);
}
list.add("A组");
list.addAll(aList);
for(int i=0; i<8; i++){
bList.add("B组"+i);
}
list.add("B组");
list.addAll(bList);
}
private class MyAdapter extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public boolean isEnabled(int position) {
// TODO Auto-generated method stub
if(groupkey.contains(getItem(position))){
return false;
}
return super.isEnabled(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View view=convertView;
if(groupkey.contains(getItem(position))){
view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item_tag, null);
}else{
view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item, null);
}
TextView text=(TextView) view.findViewById(R.id.addexam_list_item_text);
text.setText((CharSequence) getItem(position));
return view;
}
}
}
public class TestActivity extends Activity {
/** Called when the activity is first created. */
private List<String>list=null;
private List<String> groupkey=new ArrayList<String>();
private List<String> aList = new ArrayList<String>();
private List<String> bList = new ArrayList<String>();
private ListView listview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listview=(ListView) findViewById(R.id.listView_list);
initData();
MyAdapter adapter=new MyAdapter();
listview.setAdapter(adapter);
}
public void initData(){
list = new ArrayList<String>();
groupkey.add("A组");
groupkey.add("B组");
for(int i=0; i<5; i++){
aList.add("A组"+i);
}
list.add("A组");
list.addAll(aList);
for(int i=0; i<8; i++){
bList.add("B组"+i);
}
list.add("B组");
list.addAll(bList);
}
private class MyAdapter extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public boolean isEnabled(int position) {
// TODO Auto-generated method stub
if(groupkey.contains(getItem(position))){
return false;
}
return super.isEnabled(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View view=convertView;
if(groupkey.contains(getItem(position))){
view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item_tag, null);
}else{
view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item, null);
}
TextView text=(TextView) view.findViewById(R.id.addexam_list_item_text);
text.setText((CharSequence) getItem(position));
return view;
}
}
}
代码好像挺简单，更我们平时使用lsitview也没多大区别，下面看看能不能实现呢
运行一下：
摘自 wangkuifeng0118的专栏
