Exception on click group item

[Collosteam]

On Nexus 4 (Android 4.4.4) all work well, but on (Android 4.1.1) after lick on group item, application crashed with stacktrace:

FATAL EXCEPTION: main
java.lang.NullPointerException
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:495)
at android.view.View.measure(View.java:15172)
at com.idunnololz.widgets.AnimatedExpandableListView$AnimatedExpandableListAdapter.getChildView(AnimatedExpandableListView.java:386)
at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:451)
at android.widget.AbsListView.obtainView(AbsListView.java:2267)
at android.widget.ListView.makeAndAddView(ListView.java:1769)
at android.widget.ListView.fillDown(ListView.java:672)
at android.widget.ListView.fillSpecific(ListView.java:1330)
at android.widget.ListView.layoutChildren(ListView.java:1600)
at android.widget.AbsListView.onLayout(AbsListView.java:2102)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:948)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1649)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1507)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1420)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1866)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1687)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
at android.view.Choreographer.doCallbacks(Choreographer.java:555)
at android.view.Choreographer.doFrame(Choreographer.java:525)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)

[idunnololz]

Can you please post your expandablelistview structure (like layout for child and group views and how many types of child and or group views) ? Thanks

[idunnololz]

If you are testing using vanilla Android then line 495 in the relative layout source is
if (mLayoutParams.height >= 0) {
Which must mean that the layout params of a Relative Layout is null.

[Collosteam]

I'm used simple adapter
public class ExpListAdapter extends AnimatedExpandableListView.AnimatedExpandableListAdapter {

Context context;
ArrayList<String> groups;
ArrayList<ArrayList<String>> titles;

public ExpListAdapter(Context context, ArrayList<String> groups, ArrayList<ArrayList<String>> titles) {
    this.context = context;
    this.groups = groups;
    this.titles = titles;

}

@Override
public int getGroupCount() {
    return titles.size();
}

@Override
public Object getGroup(int groupPosition) {
    return titles.get(groupPosition);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    return titles.get(groupPosition).get(childPosition);
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public boolean hasStableIds() {
    return true;
}

@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.start_parent, null);
    }
      TextView textGroup = (TextView) convertView.findViewById(R.id.tv_parent_size);
    textGroup.setText(groups.get(groupPosition));
    TextView textGroupnum = (TextView) convertView.findViewById(R.id.tv_parent_numbet);
    textGroupnum.setText(String.valueOf(groupPosition + 1));
    return convertView;
}

@Override
public View getRealChildView(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.start_childer, null);
    }
    TextView textChild = (TextView) convertView.findViewById(R.id.tv_children_name);
    textChild.setText(titles.get(groupPosition).get(childPosition));
    return convertView;
}
@Override
public int getRealChildrenCount(int groupPosition) {
    return titles.get(groupPosition).size();
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}

}

In my expandable list, I use one view type for group and and one for child view

In activie I'm use next code:
// In order to show animations, we need to use a custom click handler
// for our ExpandableListView.

    listView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
            // We call collapseGroupWithAnimation(int) and
            // expandGroupWithAnimation(int) to animate group
            // expansion/collapse.
            if (listView.isGroupExpanded(groupPosition)) {
                listView.collapseGroupWithAnimation(groupPosition);
            } else {
                listView.expandGroupWithAnimation(groupPosition);
            }
            return true;
        }

    })

[idunnololz]

Instead of using LayoutInflater.inflate(int layoutId, ViewGroup parent) try using LayoutInflater.inflate(int layoutId, ViewGroup root, boolean attachToRoot).

So replace inflater.inflate(R.layout.start_parent, null); with inflater.inflate(R.layout.start_parent, parent, false); and inflater.inflate(R.layout.start_childer, null); with inflater.inflate(R.layout.start_childer, parent, false);

[Collosteam]

Thank you very much! Did not pay attention(