本文实例为大家分享了ExpandableListView使用示例,供大家参考,具体内容如下
MainActivity:
public class Expandable_test extends Activity {
private ExpandableListView listView;
private Map<String, List<String>> dataset = new HashMap<>();
private String[] parentList = new String[]{"第一个菜单", "第二个菜单"};
private ExpandableListViewAdpter adpter;
private Context mContext = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_expandable_test);
listView=(ExpandableListView)findViewById(R.id.expandableListViewtext);
adpter=new ExpandableListViewAdpter(this,parentList);
listView.setAdapter(adpter);
}
}
MainActivity.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.fae.mobile.testActivity.Expandable_test">
<ExpandableListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/expandableListViewtext">
</ExpandableListView>
</LinearLayout>
ExpandableListViewAdpter:
public class ExpandableListViewAdpter extends BaseExpandableListAdapter {
private Context mContext;
private Map<String, List<String>> dataset = new HashMap<>();
private String[] parentList = new String[]{"第一个菜单", "第二个菜单"};
private String[][] chdrenList=new String[][]
{{"菜单1","菜单1","菜单1","菜单1","菜单1","菜单1"},{"菜单2","菜单2","菜单2","菜单2","菜单2"}};
public ExpandableListViewAdpter(Context context, String[] parentList){
this.mContext=context;
this.dataset=dataset;
this.parentList=parentList;
}
@Override
public int getGroupCount() {
return parentList.length;
}
@Override
public int getChildrenCount(int groupPosition) {
return chdrenList[groupPosition].length;
}
@Override
public Object getGroup(int groupPosition) {
return parentList[groupPosition];
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return chdrenList[groupPosition][childPosition];
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
GroupViewHolder holder=null;
if(convertView==null){
convertView = LayoutInflater.from(mContext).inflate(R.layout.itemlayoutexpandable, null);
holder=new GroupViewHolder();
holder.text=(TextView)convertView.findViewById(R.id.item_text);
convertView.setTag(holder);
}
else {
holder=(GroupViewHolder)convertView.getTag();
}
holder.text.setText(parentList[groupPosition]);
return convertView;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
ChildViewHolder holder=null;
if(convertView==null){
convertView = LayoutInflater.from(mContext).inflate(R.layout.itemlayoutexpandable, null);
holder=new ChildViewHolder();
holder.text=(TextView)convertView.findViewById(R.id.item_text);
convertView.setTag(holder);
}
else {
holder=(ChildViewHolder)convertView.getTag();
}
holder.text.setText(chdrenList[groupPosition][childPosition]);
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
class GroupViewHolder {
TextView text;
}
class ChildViewHolder {
TextView text;
}
}
Item.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"
android:id="@+id/item_text"/>
</LinearLayout>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持亿速云。
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