I made the usual 3-level ExpandableListView, based on many examples on the Internet, and it works well.
With one caveat. Clicking on the 2nd and 3rd levels does not always work. Although sometimes it works fine. Usually it runs everywhere at startup. Then it no longer works like 50% of items. Without any logic. Sometimes I expand the second group, and then I can no longer destroy this group. Or sometimes I expand the second group, and then I cannot collapse any other group of the second level. The only consistent thing is that it is often fixed by scrolling through the locked view from the visible area and vice versa.
What could be?
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.chooselib);
ExpandableListView lv = (ExpandableListView) findViewById(R.id.libListView);
lv.setAdapter(new LibraryListAdapter());
}
final List<String> states = new ArrayList<String>();
final List<List<String>> cities = new ArrayList<List<String>>();
final List<List<List<Map<String, String>>>> localLibs = new ArrayList<List<List<Map<String, String>>>>();
public abstract class LibraryListBaseAdapter extends BaseExpandableListAdapter{
@Override
public Object getChild(int groupPosition, int childPosition)
{
return getChildId(groupPosition, childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition)
{
return (groupPosition << 15) + childPosition + 1;
}
@Override
public Object getGroup(int groupPosition)
{
return getGroupId(groupPosition);
}
@Override
public long getGroupId(int groupPosition)
{
return (groupPosition << 15);
}
@Override
public boolean hasStableIds()
{
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
return true;
}
}
public class LibraryListAdapter extends LibraryListBaseAdapter
{
Map<Integer, ExpandableListView> cache = new TreeMap<Integer, ExpandableListView>();
@Override
public View getChildView(final int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent)
{
if (cache.containsKey(groupPosition*10000 + childPosition))
return cache.get(groupPosition*10000 + childPosition);
LibraryListCityView l = new LibraryListCityView();
l.setPadding((int)(60 * getResources().getDisplayMetrics().density), l.getPaddingTop(), l.getPaddingRight(), l.getPaddingBottom());
l.setAdapter(new LibraryListCityAdapter(groupPosition,childPosition));
if (cities.get(groupPosition).size() == 1) l.expandGroup(0);
l.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView expandableListView, View view, int i, int lib, long l) {
onLeafClick(groupPosition,childPosition,lib);
return false;
}
});
cache.put(groupPosition*10000 + childPosition, l);
return l;
}
@Override
public int getChildrenCount(int groupPosition)
{
return cities.get(groupPosition).size();
}
@Override
public int getGroupCount()
{
return states.size();
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent)
{
View row =
getLayoutInflater().inflate(android.R.layout.simple_expandable_list_item_1, parent, false);
((TextView) row).setText(states.get(groupPosition));
return row;
}
}
public class LibraryListCityView extends ExpandableListView
{
int intGroupPosition, intChildPosition, intGroupid;
public LibraryListCityView()
{
super(LibraryList.this);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
widthMeasureSpec = MeasureSpec.makeMeasureSpec(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.EXACTLY);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(2000, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onDetachedFromWindow() {
try {
super.onDetachedFromWindow();
} catch (IllegalArgumentException e) {
}
}
}
public class LibraryListCityAdapter extends LibraryListBaseAdapter
{
int state,city;
LibraryListCityAdapter (int a, int b) {
state = a;
city = b;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent)
{
View row = getLayoutInflater().inflate(R.layout.libraryinlistview , parent, false);
((TextView) row).setText(localLibs.get(state).get(city).get(childPosition).get("NAME"));
return row;
}
@Override
public int getChildrenCount(int groupPosition)
{
return localLibs.get(state).get(city).size();
}
@Override
public int getGroupCount()
{
return 1;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent)
{
View row = getLayoutInflater().inflate(R.layout.librarycityinlistview, parent, false);
((TextView) row).setText(cities.get(state).get(city));
return row;
}
}
chooselib.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lay_chooselib_choose"
android:id="@+id/textView" android:layout_gravity="center_vertical|left" android:padding="5sp"/>
<ExpandableListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/libListView" android:layout_gravity="right|center_vertical"
/>
</LinearLayout>
librarycityinlistview.xml:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:gravity="center_vertical"
android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceListItem"
/>
libraryinlistview.xml:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:paddingLeft="60dip"
android:gravity="center_vertical"
/>
https://code.google.com/p/android/issues/detail?id=3414, ( ), . ( , ). logcat,
, , , - onMeasure. . , 1- , 2- ?