多级列表ExpandableListView
扩展列表能够显示一个指示在每项显示项的当前状态（状态通常是一个扩展的组，组的孩子，或倒塌，最后一个孩子）。使用setchildindicator（drawable）或setgroupindicator（drawable）（或相应的XML属性）来设置这些指标,一个默认的风格多级列表提供指标，将示给意见多级列表。布局android.r.layout.simple_expandable_list_item_1和android.r.layout.simple_expandable_list_item_2（应用simplecursortreeadapter）包含位置信息的首选指标。
效果图：
activity_main.xml
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical">
<ExpandableListView
android:id="@+id/expandableListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#E4E4E4"
android:dividerHeight="5dp">
</ExpandableListView>
</LinearLayout>
child_item.xml
<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textViews"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#ff0000"/>
</LinearLayout>
groud_item.xml
<LinearLayoutxmlns: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:gravity="center_vertical"
android:orientation="horizontal">
<ImageView
android:id="@+id/imageView1"
android:layout_width="65dp"
android:layout_height="55dp"
android:layout_marginLeft="10dp"
android:scaleType="fitXY"
android:src="@drawable/l1"/>
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="斯蒂芬"/>
</LinearLayout>
MainActivity.java
public class MainActivity extends Activity {
private ExpandableListView listView;
private List<String> group;
private List<List<String>> child;
private MyAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ExpandableListView) findViewById(R.id.expandableListView);
/**
* 初始化数据
*/
initData();
adapter = new MyAdapter(this,group,child);
listView.setAdapter(adapter);
}
private void initData() {
group = new ArrayList<String>();
child = new ArrayList<List<String>>();
addInfo("笑傲江湖",new String[]{"东方不败","风清扬","令狐冲","岳不群"});
addInfo("天龙八部", new String[]{"乔峰","虚竹","段誉"});
addInfo("九阴真经", new String[]{"中神通","东邪","西毒","南帝","北丐"});
}
/**
* 添加数据信息
* @param g
* @param c
*/
private void addInfo(String g,String[] c) {
group.add(g);
List<String> list = new ArrayList<String>();
for (int i = 0; i < c.length; i++) {
list.add(c[i]);
}
child.add(list);
}
}
Adapter.java
/**
* expandableListView的用法同ListView
*
*/
public class MyAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> group;
private List<List<String>> child;
private int[] img={R.drawable.l2,R.drawable.l3,R.drawable.l1};
public MyAdapter(Context context, List<String> group,
List<List<String>> child) {
this.context = context;
this.group = group;
this.child = child;
}
@Override
public int getGroupCount() {
return group.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return child.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return group.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return child.get(childPosition).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
/**
*
* 获取显示指定组的视图对象
*
* @param groupPosition 组位置
* @param isExpanded 该组是展开状态还是伸缩状态
* @param convertView 重用已有的视图对象
* @param parent 返回的视图对象始终依附于的视图组
* @return
* @see android.widget.ExpandableListAdapter#getGroupView(int, boolean, android.view.View,
* android.view.ViewGroup)
*/
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(
R.layout.groud_item, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView
.findViewById(R.id.textView);
holder.mImageView=(ImageView) convertView.findViewById(R.id.imageView1);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText(group.get(groupPosition));
holder.textView.setTextSize(25);
holder.textView.setPadding(36, 10, 0, 10);
holder.mImageView.setImageResource(img[groupPosition]);
return convertView;
}
/**
*
* 获取一个视图对象，显示指定组中的指定子元素数据。
*
* @param groupPosition 组位置
* @param childPosition 子元素位置
* @param isLastChild 子元素是否处于组中的最后一个
* @param convertView 重用已有的视图(View)对象
* @param parent 返回的视图(View)对象始终依附于的视图组
* @return
* @see android.widget.ExpandableListAdapter#getChildView(int, int, boolean, android.view.View,
* android.view.ViewGroup)
*/
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(
R.layout.child_item, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView
.findViewById(R.id.textViews);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText(child.get(groupPosition).get(childPosition));
holder.textView.setTextSize(20);
holder.textView.setPadding(72, 10, 0, 10);
return convertView;
}
/**
*
* 是否选中指定位置上的子元素。
*
* @param groupPosition
* @param childPosition
* @return
* @see android.widget.ExpandableListAdapter#isChildSelectable(int, int)
*/
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
class ViewHolder {
ImageView mImageView;
TextView textView;
}
}
源码下载：
Eclipse下载：http://download.csdn.net/detail/dickyqie/9630549
AndroidStudio下载：https://github.com/DickyQie/ListViewExpandableListViewDelete/tree/expandablelistview