我正在努力使用多级可扩展ListViews。我设法制作一个3级可扩展ListView，它是：
- GrandParent ---父母 -----孩子
但每当我尝试添加第4个子孩子时，视图似乎出现在最后一个级别之后。以下是我用来实现这一目标的要素：
CustomExpandableListView.java
public class CustomExpandableListView extends ExpandableListView {
public CustomExpandableListView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
}
public CustomExpandableListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomExpandableListView(Context context) {
super(context);
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
heightMeasureSpec = MeasureSpec.makeMeasureSpec(2000, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onDetachedFromWindow() {
try {
super.onDetachedFromWindow();
} catch (IllegalArgumentException e) {
e.printStackTrace();
}
}
}
ExpandableListAdapter.java
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> listDataHeader; // header titles
private HashMap<String, List<ExpandableItem>> listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<ExpandableItem>> listChildData) {
this.context = context;
this.listDataHeader = listDataHeader;
this.listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this.listDataChild.get(this.listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition).getNumberOfChildren() > 0) {
DPPCustomExpandableListView subList = new DPPCustomExpandableListView(context);
List<ExpandableItem> list = listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition).getItems();
ArrayList<String> headers = new ArrayList<String>();
HashMap<String, List<ExpandableItem>> newMap = new HashMap<>();
String name = "Expandable";
headers.add(name);
newMap.put(name, list);
MultiExpandableListAdapter multiAdapter = new MultiExpandableListAdapter(context, headers, newMap);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
subList.setLayoutParams(params);
subList.setAdapter(multiAdapter);
MySalesFragment currentFragment = (MySalesFragment) ((MainActivity) context).getFragmentManager().findFragmentById(R.id.container);
if (currentFragment.getCurrentPagerFragment().getClass().equals(SalesDeclarationFragment.class)) {
SalesDeclarationFragment salesDeclarationFragment = (SalesDeclarationFragment) currentFragment.getCurrentPagerFragment();
subList.setOnChildClickListener(salesDeclarationFragment);
}
return subList;
}
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.sales_declaration_expandable_listview_item, null);
TextView txtListChild = (TextView) convertView
.findViewById(R.id.child_textview);
//txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this.listDataChild.get(this.listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
List<ExpandableItem> items = listDataChild.get(listDataHeader.get(groupPosition));
return items;
}
@Override
public int getGroupCount() {
return this.listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.sales_declaration_expandable_list_view_group_header, null);
}
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
MultiExpandableListAdapter.java
public class MultiExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> listDataHeader; // header titles
private HashMap<String, List<ExpandableItem>> listDataChild;
public static int count = 0;
public MultiExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<ExpandableItem>> listChildData) {
this.context = context;
this.listDataHeader = listDataHeader;
this.listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this.listDataChild.get(this.listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if(listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition).getNumberOfChildren() > 0) {
subList = new DPPNLevelCustomEpandableListView(context);
List<ExpandableItem> list = listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition).getItems();
ArrayList<String> headers = new ArrayList<String>();
HashMap<String, List<ExpandableItem>> newMap = new HashMap<>();
headers.add(name);
newMap.put(name, list);
MultiExpandableListAdapter multiAdapter = new MultiExpandableListAdapter(context, headers, newMap);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
subList.setLayoutParams(params);
subList.setAdapter(multiAdapter);
subList.setBackgroundColor(context.getResources().getColor(R.color.loyalty_store_theme_yellow));
MySalesFragment currentFragment = (MySalesFragment)((MainActivity)context).getFragmentManager().findFragmentById(R.id.container);
if (currentFragment.getCurrentPagerFragment().getClass().equals(SalesDeclarationFragment.class)) {
SalesDeclarationFragment salesDeclarationFragment = (SalesDeclarationFragment)currentFragment.getCurrentPagerFragment();
subList.setOnChildClickListener(salesDeclarationFragment);
}
return subList;
}
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.sales_declaration_expandable_listview_item, null);
convertView.setBackgroundColor(context.getResources().getColor(R.color.cpb_blue));
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
int count = this.listDataChild.get(listDataHeader.get(groupPosition)).size();
return count;
}
@Override
public Object getGroup(int groupPosition) {
List<ExpandableItem> items = listDataChild.get(listDataHeader.get(groupPosition));
return items;
}
@Override
public int getGroupCount() {
return this.listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.sales_declaration_expandable_listview_item, null);
convertView.setBackgroundColor(context.getResources().getColor(R.color.cpb_green));
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
ExpandableItem.java
public interface ExpandableItem {
int getNumberOfChildren();
ArrayList<ExpandableItem> getItems();
void addExpandableItem(ExpandableItem item);
String getName();
}
ListTextItem.java
public class ListTextItem implements ExpandableItem{
private ArrayList<ExpandableItem> items;
private String name;
public ListTextItem(String name){
this.name = name;
items = new ArrayList<ExpandableItem>();
}
@Override
public int getNumberOfChildren() {
return items.size();
}
public ArrayList<ExpandableItem> getItems() {
return items;
}
public void addExpandableItem(ExpandableItem itemToAdd) {
items.add(itemToAdd);
}
public String getName() {
return name;
}
}
ExampleFragment.java
public class ExampleFragment extends Fragment implements ExpandableListView.OnChildClickListener {
private View root;
ExpandableListAdapter listAdapter;
@InjectView(R.id.sales_declaration_list)
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<ExpandableItem>> listDataChild;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
this.root = inflater.inflate(R.layout.fragment_sales_declaration, container, false);
ButterKnife.inject(this, root);
return root;
}
@Override
public void onStart() {
super.onStart();
// preparing list data
prepareListData();
listAdapter = new ExpandableListAdapter(getActivity(), listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
expListView.setGroupIndicator(null);
expListView.setDividerHeight(0);
expListView.setOnChildClickListener(this);
}
@Override
public void onDetach() {
super.onDetach();
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<ExpandableItem>>();
// Adding child data
listDataHeader.add("Top 250");
listDataHeader.add("Now Showing");
listDataHeader.add("Coming Soon..");
// Adding child data
List<ExpandableItem> top250 = new ArrayList<ExpandableItem>();
top250.add(new ListTextItem("The Shawshank Redemption"));
top250.add(new ListTextItem("The Godfather"));
top250.add(new ListTextItem("The Godfather: Part II"));
top250.add(new ListTextItem("Pulp Fiction"));
top250.add(new ListTextItem("The Good, the Bad and the Ugly"));
top250.add(new ListTextItem("The Dark Knight"));
top250.add(new ListTextItem("12 Angry Men"));
List<ExpandableItem> nowShowing = new ArrayList<ExpandableItem>();
nowShowing.add(new ListTextItem("The Conjuring"));
nowShowing.add(new ListTextItem("Despicable Me 2"));
nowShowing.add(new ListTextItem("Turbo"));
nowShowing.add(new ListTextItem("Grown Ups 2"));
nowShowing.add(new ListTextItem("Red 2"));
nowShowing.add(new ListTextItem("The Wolverine"));
nowShowing.add(new ListTextItem("The Wolverine2"));
nowShowing.add(new ListTextItem("The Wolverine3"));
nowShowing.add(new ListTextItem("The Wolverine4"));
List<ExpandableItem> comingSoon = new ArrayList<ExpandableItem>();
comingSoon.add(new ListTextItem("2 Guns"));
comingSoon.add(new ListTextItem("The Smurfs 2"));
comingSoon.add(new ListTextItem("The Spectacular Now"));
comingSoon.add(new ListTextItem("The Canyons"));
comingSoon.add(new ListTextItem("Europa Report"));
for(ExpandableItem item : comingSoon) {
top250.get(1).addExpandableItem(item);
}
for(ExpandableItem item : nowShowing) {
top250.get(1).getItems().get(0).addExpandableItem(item);
}
for(ExpandableItem item : comingSoon) {
top250.get(3).addExpandableItem(item);
}
listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
listDataChild.put(listDataHeader.get(1), nowShowing);
listDataChild.put(listDataHeader.get(2), comingSoon);
}
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
if(!(((ExpandableItem)parent.getExpandableListAdapter().getChild(groupPosition, childPosition)).getNumberOfChildren() > 0)){
//Toast.makeText(getActivity(), listAdapter.getChild(groupPosition, childPosition).toString(), Toast.LENGTH_SHORT).show();
LSFragmentManager fragmentManager = new LSFragmentManager(getActivity());
fragmentManager.showFragment(Fragment2.class.getName());
}
return false;
}
}
抱歉，对于这篇长篇文章，希望有人能帮助我！