android 中listveiw实现分组

最新推荐文章于 2018-09-12 10:40:54 发布

zhanglipingzlp

最新推荐文章于 2018-09-12 10:40:54 发布

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本文介绍了一种使用自定义适配器实现带有标签项的列表视图的方法。通过创建不同的布局文件来区分标签项和数据项，并在适配器中判断是否为标签项来加载对应的布局。

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main.xml 布局：

<?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>

标签项布局：

<?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>

数据项布局：

<?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>

代码：

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))){//如果是标签项
view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item_tag, null);
}else{//数据项
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;
}

}
}