我的 Activity 中有一个 ListView，但现在我想将其更改为 ExpandableListView。我是否需要完全更改我的 ListView ，或者我可以将 expandableListView 添加到我现有的 ListView 中？
最佳答案
这是我使用的示例。您可以更改它并使用它。
// ListView 代码
public class FevList extends ExpandableListActivity {
String title;
String url;
SQLiteDatabase database;
DbUtil db;
HashMap<String, String> map = new HashMap<String, String>();
ArrayList<HashMap<String, String>> subjectList = new ArrayList<HashMap<String, String>>();
@SuppressWarnings("unchecked")
@Override
protected void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.exlist);
db = new DbUtil();
database = db.openConnection(this);
// Thread for getting values of title from DataBase.
SimpleExpandableListAdapter expListAdapter = new SimpleExpandableListAdapter(
this, createGroupList(), R.layout.group_row,
new String[] { "subject" }, new int[] { R.id.row_name },
createChildList(), R.layout.child_row,
new String[] { "title" }, new int[] { R.id.grp_child });
setListAdapter(expListAdapter);
registerForContextMenu(getExpandableListView());
} catch (Exception e) {
e.printStackTrace();
}
}
// code for adapter
/* Creating the Hashmap for the row */
ArrayList<HashMap<String, String>> result = new ArrayList<HashMap<String, String>>();
@SuppressWarnings("unchecked")
private List createGroupList() {
// write your code here.
return (List) result;
}
/* creatin the HashMap for the children */
@SuppressWarnings("unchecked")
private List createChildList() {
// write your code here.
return result;
}
public void onContentChanged() {
System.out.println("onContentChanged");
super.onContentChanged();
}
/* This function is called on each child click */
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// write your code here.
return true;
}
/* This function is called on expansion of the group */
public void onGroupExpand(int groupPosition) {
try {
System.out.println("Group exapanding Listener => groupPosition = "
+ groupPosition);
} catch (Exception e) {
System.out.println(" groupPosition Errrr +++ " + e.getMessage());
}
}
}
关于android - 将 ListView 更改为 ExpandableListView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18510291/