我尝试使用自己的 ExpandableListAdapter 构建 ExpandableListView 但 ExpandableListView 在我的活动中不可见:-(
您可以在下面找到我的源代码。
谢谢你的帮助 ：-）
问候，康吉
这里是来自活动的代码：
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.group_main);
onCreateDBAndDBTabled();
mAddGroupButton = (Button) findViewById(R.id.Button_Add_Group);
mAddGroupButton.setOnClickListener(this);
mExpandableList = (ExpandableListView) findViewById(R.id.ExpandableListView01);
ArrayList<ExpandableListItem> valueTree = new ArrayList<ExpandableListItem>();
ExpandableListItem gp1 = new ExpandableListItem();
gp1.putProperty("name", "e");
ExpandableListItem gp11 = new ExpandableListItem();
gp11.putProperty("name", "l");
gp1.addChild(gp11);
ExpandableListItem gp2 = new ExpandableListItem();
gp2.putProperty("name", "A");
ExpandableListItem gp22 = new ExpandableListItem();
gp22.putProperty("name", "B");
ExpandableListItem gp23 = new ExpandableListItem();
gp23.putProperty("name", "A1");
ExpandableListItem gp24 = new ExpandableListItem();
gp24.putProperty("name", "A3");
ExpandableListItem gp25 = new ExpandableListItem();
gp25.putProperty("name", "A4");
gp2.addChild(gp22);
gp2.addChild(gp23);
gp2.addChild(gp24);
gp2.addChild(gp25);
valueTree.add(gp1);
valueTree.add(gp2);
Log.d("onCreate", "hasChild " + gp1.hasChilds());
Log.d("onCreate", "hasChild " + gp2.hasChilds());
MyColoredExpandableListAdapter adapter = new MyColoredExpandableListAdapter(this, valueTree);
mExpandableList.setAdapter(adapter);
}
代码 MyColoredExpandableListAdapter：
private class MyColoredExpandableListAdapter extends MyExpandableListAdapter{
public MyColoredExpandableListAdapter(Context context,
ArrayList<ExpandableListItem> valueTree) {
super(context, valueTree);
Log.d("MyColoredExpandableListAdapter", "Group Count" + this.getGroupCount());
for(int i = 0; i < this.getGroupCount(); i++)
Log.d("MyColoredExpandableListAdapter", "Child Count" + this.getChildrenCount(i));
// TODO Auto-generated constructor stub
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Log.d("getChildView", "GO INTO");
if(convertView == null){
LayoutInflater inflater = LayoutInflater.from(mContext);
convertView = inflater.inflate(R.layout.group_exp_childs, null);
}
TextView text = (TextView) convertView.findViewById(R.id.TextView_Group_EXP_Childs);
text.setText(">>" + this.mValueTree.get(groupPosition).getChild(childPosition).getProperty("name"));
return convertView;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Log.d("getGroupView", "GO INTO");
if(convertView == null){
LayoutInflater inflater = LayoutInflater.from(mContext);
convertView = inflater.inflate(R.layout.group_exp_childs, null);
}
TextView text = (TextView) convertView.findViewById(R.id.TextView_Group_EXP_Childs);
text.setText(">" + this.mValueTree.get(groupPosition).getProperty("name"));
return convertView;
}
}
代码 MyExpandableListAdapter：
public abstract class MyExpandableListAdapter extends BaseExpandableListAdapter {
protected Context mContext;
protected ArrayList<ExpandableListItem> mValueTree;
public MyExpandableListAdapter(Context context,
ArrayList<ExpandableListItem> valueTree)
{
mContext = context;
mValueTree = valueTree;
}
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
if(mValueTree.get(groupPosition).hasChilds())
return mValueTree.get(groupPosition).getChild(childPosition);
return null;
}
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition; // WE NEED NO SPECIAL ID
}
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
if(mValueTree.get(groupPosition).hasChilds())
return mValueTree.get(groupPosition).sizeOfChilds();
return 0;
}
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return mValueTree.get(groupPosition);
}
public int getGroupCount() {
// TODO Auto-generated method stub
return mValueTree.size();
}
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition; // WE NEED NO SPECIAL ID
}
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
代码扩展列表项：
public class ExpandableListItem {
private HashMap<String,String> properties = new HashMap<String,String>();
public void clearProperties() {
properties.clear();
}
public boolean containsPropertyKey(String key) {
return properties.containsKey(key);
}
public boolean containsPropertyValue(String value) {
return properties.containsValue(value);
}
public String getProperty(String key) {
return properties.get(key);
}
public boolean hasProperties() {
return !properties.isEmpty();
}
public String putProperty(String key, String value) {
return properties.put(key, value);
}
public String removeProperty(String key) {
return properties.remove(key);
}
public int sizeOfProperties() {
return properties.size();
}
public String[] propertiesKeys()
{
int count = 0;
String[] result = new String[sizeOfProperties()];
for(String key : this.properties.keySet())
result[count++] = key;
return result;
}
private ArrayList<ExpandableListItem> childs = new ArrayList<ExpandableListItem>();
public boolean addChild(ExpandableListItem object) {
return childs.add(object);
}
public void clearChilds() {
childs.clear();
}
public ExpandableListItem getChild(int index) {
return childs.get(index);
}
public boolean hasChilds() {
return !childs.isEmpty();
}
public ExpandableListItem removeChild(int index) {
return childs.remove(index);
}
public int sizeOfChilds() {
return childs.size();
}
}