我在下面有多级可扩展列表视图是我的代码
public class MainActivity extends AppCompatActivity {
public static final int FIRST_LEVEL_COUNT = 6;
public static final int SECOND_LEVEL_COUNT = 4;
public static final int THIRD_LEVEL_COUNT = 20;
private ExpandableListView expandableListView;
private ArrayList<Product> pProductArrayList;
private ArrayList<Product.SubCategory> pSubItemArrayList;
private ArrayList<Product.SubCategory> pSubItemArrayList2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
expandableListView = (ExpandableListView) findViewById(R.id.mainList);
ArrayList<Product.SubCategory.ItemList> mItemListArray = new ArrayList<Product.SubCategory.ItemList>();
mItemListArray.add(new Product.SubCategory.ItemList("Red", "20"));
mItemListArray.add(new Product.SubCategory.ItemList("Blue", "50"));
mItemListArray.add(new Product.SubCategory.ItemList("Red", "20"));
mItemListArray.add(new Product.SubCategory.ItemList("Blue", "50"));
ArrayList<Product.SubCategory.ItemList> mItemListArray2 = new ArrayList<Product.SubCategory.ItemList>();
mItemListArray2.add(new Product.SubCategory.ItemList("Pant", "2000"));
mItemListArray2.add(new Product.SubCategory.ItemList("Shirt", "1000"));
mItemListArray2.add(new Product.SubCategory.ItemList("Pant", "2000"));
mItemListArray2.add(new Product.SubCategory.ItemList("Shirt", "1000"));
mItemListArray2.add(new Product.SubCategory.ItemList("Pant", "2000"));
mItemListArray2.add(new Product.SubCategory.ItemList("Shirt", "1000"));
/**
*
*/
pSubItemArrayList = new ArrayList<Product.SubCategory>();
pSubItemArrayList2 = new ArrayList<Product.SubCategory>();
pSubItemArrayList.add(new Product.SubCategory("Color", mItemListArray));
pSubItemArrayList2.add(new Product.SubCategory("Cloths", mItemListArray2));
pSubItemArrayList.add(new Product.SubCategory("Color", mItemListArray));
pSubItemArrayList2.add(new Product.SubCategory("Cloths", mItemListArray2));
/**
*
*/
pProductArrayList = new ArrayList<Product>();
pProductArrayList.add(new Product("Emotions", pSubItemArrayList));
pProductArrayList.add(new Product("Garments", pSubItemArrayList2));
Log.d("pSubItemArrayList2", String.valueOf(pSubItemArrayList2.size()));
expandableListView.setAdapter(new ParentLevel(this, pProductArrayList, pSubItemArrayList, pSubItemArrayList2));
// First level items in the ExpandableListView
expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView eListView, View view, int groupPosition,
long id) {
// TODO: whatever you need
return false /* or true depending on what you need */;
}
});
// Second level items in the ExpandableListView
ExpandableListView.OnGroupClickListener grpLst = new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView eListView, View view, int groupPosition,
long id) {
// TODO: whatever you need
return false /* or true depending on what you need */;
}
};
// Third (and last) level items in the ExpandableListView
ExpandableListView.OnChildClickListener childLst = new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView eListView, View view, int groupPosition,
int childPosition, long id) {
// TODO: whatever you need
return false /* or true depending on what you need */;
}
};
ExpandableListView.OnGroupExpandListener grpExpLst = new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
/* this one is not required of course, you can delete it from the RootAdapter Constructor
* it is just an example as to how to implement Listeners on the second level items */
}
};
}
public class ParentLevel extends BaseExpandableListAdapter {
private Context context;
private ArrayList<Product> pProductArrayList;
private ArrayList<Product.SubCategory> pSubItemArrayList;
private ArrayList<Product.SubCategory> pSubItemArrayList2;
public ParentLevel(Context context) {
this.context = context;
}
public ParentLevel(MainActivity mainActivity, ArrayList<Product> pProductArrayList, ArrayList<Product.SubCategory> pSubItemArrayList, ArrayList<Product.SubCategory> pSubItemArrayList2) {
this.context = mainActivity;
this.pProductArrayList = pProductArrayList;
this.pSubItemArrayList = pSubItemArrayList;
this.pSubItemArrayList2 = pSubItemArrayList2;
}
@Override
public Object getChild(int arg0, int arg1) {
return arg1;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
SecondLevelExpandableListView secondLevelELV = new SecondLevelExpandableListView(MainActivity.this);
secondLevelELV.setAdapter(new SecondLevelAdapter(context, groupPosition, childPosition));
secondLevelELV.setGroupIndicator(null);
return secondLevelELV;
}
@Override
public int getChildrenCount(int groupPosition) {
return pSubItemArrayList.size();
}
@Override
public Object getGroup(int groupPosition) {
return groupPosition;
}
@Override
public int getGroupCount() {
return pProductArrayList.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row_first, null);
TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
text.setText(pProductArrayList.get(groupPosition).getpName());
}
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
public class SecondLevelExpandableListView extends ExpandableListView {
public SecondLevelExpandableListView(Context context) {
super(context);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//999999 is a size in pixels. ExpandableListView requires a maximum height in order to do measurement calculations.
heightMeasureSpec = MeasureSpec.makeMeasureSpec(999999, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public class SecondLevelAdapter extends BaseExpandableListAdapter {
private Context context;
int group;
int child;
public SecondLevelAdapter(Context context) {
this.context = context;
}
public SecondLevelAdapter(Context context, int groupPosition, int childPosition) {
this.context = context;
this.group = groupPosition;
this.child = childPosition;
}
@Override
public Object getGroup(int groupPosition) {
return groupPosition;
}
@Override
public int getGroupCount() {
return 1;
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row_third, null);
TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
final String catName = pProductArrayList.get(group).getmSubCategoryList().get(child).getpSubCatName();
text.setText(catName);
}
return convertView;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row_second, null);
TextView text = (TextView) convertView.findViewById(R.id.eventsListEventRowText);
text.setText(pProductArrayList.get(group).getmSubCategoryList().get(child).getmItemListArray().get(childPosition).getItemName() + " " + pProductArrayList.get(group).getmSubCategoryList().get(child).getmItemListArray().get(childPosition).getItemPrice());
}
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return pSubItemArrayList2.size();
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
}
当我在Cloth中的Garments选项中运行上面的代码时，只显示2个项目，它应该在最后一级显示6个项目，所以我知道如何解决这个问题？你的所有建议都很明显。
修改
public class Product {
private String pName;
private ArrayList<SubCategory> mSubCategoryList;
public Product(String pName, ArrayList<SubCategory> mSubCategoryList) {
super();
this.pName = pName;
this.mSubCategoryList = mSubCategoryList;
}
public String getpName() {
return pName;
}
public void setpName(String pName) {
this.pName = pName;
}
public ArrayList<SubCategory> getmSubCategoryList() {
return mSubCategoryList;
}
public void setmSubCategoryList(ArrayList<SubCategory> mSubCategoryList) {
this.mSubCategoryList = mSubCategoryList;
}
/**
*
* second level item
*
*/
public static class SubCategory {
private String pSubCatName;
private ArrayList<ItemList> mItemListArray;
public SubCategory(String pSubCatName,
ArrayList<ItemList> mItemListArray) {
super();
this.pSubCatName = pSubCatName;
this.mItemListArray = mItemListArray;
}
public String getpSubCatName() {
return pSubCatName;
}
public void setpSubCatName(String pSubCatName) {
this.pSubCatName = pSubCatName;
}
public ArrayList<ItemList> getmItemListArray() {
return mItemListArray;
}
public void setmItemListArray(ArrayList<ItemList> mItemListArray) {
this.mItemListArray = mItemListArray;
}
/**
*
* third level item
*
*/
public static class ItemList {
private String itemName;
private String itemPrice;
public ItemList(String itemName, String itemPrice) {
super();
this.itemName = itemName;
this.itemPrice = itemPrice;
}
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public String getItemPrice() {
return itemPrice;
}
public void setItemPrice(String itemPrice) {
this.itemPrice = itemPrice;
}
}
}
}
项目点击不工作
// First level items in the ExpandableListView
expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView eListView, View view, int groupPosition,
long id) {
// TODO: whatever you need
Log.d("Grop ",pProductArrayList.get(groupPosition).getpName());
return false /* or true depending on what you need */;
}
});
// Second level items in the ExpandableListView
ExpandableListView.OnGroupClickListener grpLst = new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView eListView, View view, int groupPosition,
long id) {
// TODO: whatever you need
Log.d("Sub Grop ",pProductArrayList.get(groupPosition).getmSubCategoryList().get(groupPosition).getpSubCatName());
return false /* or true depending on what you need */;
}
};
// Third (and last) level items in the ExpandableListView
ExpandableListView.OnChildClickListener childLst = new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView eListView, View view, int groupPosition,
int childPosition, long id) {
Log.d("Child Grop ",pProductArrayList.get(groupPosition).getmSubCategoryList().get(groupPosition).getmItemListArray().get(childPosition).getItemName()+" "+pProductArrayList.get(groupPosition).getmSubCategoryList().get(groupPosition).getmItemListArray().get(childPosition).getItemPrice());
// TODO: whatever you need
return false /* or true depending on what you need */;
}
};
ExpandableListView.OnGroupExpandListener grpExpLst = new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
/* this one is not required of course, you can delete it from the RootAdapter Constructor
* it is just an example as to how to implement Listeners on the second level items */
}
};
答案 0 :(得分：1)
在SecondLevelAdapter中，getChildrenCount方法返回pSubItemArrayList2大小，该大小始终为2。更改如下：
@Override
public int getChildrenCount(int groupPosition) {
return pProductArrayList.get(group).getmSubCategoryList().get(child).getmItemListArray().size();
}
对于项目单击：在ParentLevel适配器中更改此：
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
SecondLevelExpandableListView secondLevelELV = new SecondLevelExpandableListView(ExpandableActivity1.this);
secondLevelELV.setAdapter(new SecondLevelAdapter(context, groupPosition, childPosition));
secondLevelELV.setGroupIndicator(null);
// Third (and last) level items in the ExpandableListView
ExpandableListView.OnChildClickListener childLst = new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView eListView, View view, int groupPosition,
int childPosition, long id) {
// TODO: whatever you need
Toast.makeText(getApplicationContext(),"test",Toast.LENGTH_SHORT).show();
return false /* or true depending on what you need */;
}
};
secondLevelELV.setOnChildClickListener(childLst);
return secondLevelELV;
}