CODEWITHSUNDEEP
androidexpandablelistview
Monty
Monty

Reputation: 3215

Why getGroupView is not calling in ExpandableListView?

This is my code . l when i am running it,nothing comes on emulator screen. even i am passing value for parent group.

i put break point also on getGroupView but this method not get calling.

// class for value in parent group

public class ArrayForList
{
    public static String[] grp ={"Car"};
}

// Activity

public class ExpandableActivity extends Activity {

    ExpandableListView ev;
    ExpandableAdapter adp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_expandable);

        ev = (ExpandableListView) findViewById(R.id.el);
        ev.setAdapter(new ExpandableAdapter(this));
    }
    }

//Adapter

public class ExpandableAdapter extends BaseExpandableListAdapter {

    Context myContext;
    public ExpandableAdapter(Context con)
    {
        this.myContext = con;
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public Object getGroup(int groupPosition) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public int getGroupCount() {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public long getGroupId(int groupPosition) {
        // TODO Auto-generated method stub
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater inflater =  (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.group_row, null);
        }

        TextView tvGroupName = (TextView) convertView.findViewById(R.id.tv_group);
        tvGroupName.setText(ArrayForList.grp[groupPosition]);

        return convertView;

    }

    @Override
    public boolean hasStableIds() {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return false;
    }
    }

//xml group_row

 <TextView
        android:id="@+id/tv_group"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

//xml main

<ExpandableListView
        android:id="@+id/el"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

Upvotes: 2

Views: 3212

Answers (1)

user2251725
user2251725

Reputation: 406

In ExpandableAdapter class change return value of some methods.like getGroupCount() return size 0,its change to group size. getGroup(int groupPosition),it also return null value, change value of group at groupPosition.

Upvotes: 8

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