getFragmentManager() inside class

Question

i'm trying to getFragmentManager inside class to show my dialogFragment but it's throw error...:

java.lang.ClassCastException: example.MyApplication cannot be cast to android.app.Activity

and here is my full class :

public class ExpandableListAdapter extends BaseExpandableListAdapter {

private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
private static final String TAG = "ExpandableListAdapter";
Activity activity;

public ExpandableListAdapter(Context context, List<String> listDataHeader,
                             HashMap<String, List<String>> listChildData) {
    this._context = context;
    this._listDataHeader = listDataHeader;
    this._listDataChild = listChildData;

}

@Override
public Object getChild(int groupPosition, int childPosititon) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .get(childPosititon);
}

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

@Override
public View getChildView(int groupPosition, final int childPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {

    final String childText = (String) getChild(groupPosition, childPosition);

    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_item, null);
    }

    TextView txtListChild = (TextView) convertView
            .findViewById(R.id.viewEmployee);


    txtListChild.setText(childText);
    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    return this._listDataChild.get(this._listDataHeader.get(groupPosition))
            .size();
}

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

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

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

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    String headerTitle = (String) getGroup(groupPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_group, null);
    }

    TextView lblListHeader = (TextView) convertView
            .findViewById(R.id.employeeType);
    TextView addEmpolyee = (TextView) convertView.findViewById(R.id.addEmployee); 
    addEmpolyee.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            activity = (Activity) _context;
            DataEntryEmpolyee empolyee = new DataEntryEmpolyee();
            empolyee.show(activity.getFragmentManager(), "DIALOG_FRAGMENT");
        }
    });

    lblListHeader.setTypeface(null, Typeface.BOLD);
    lblListHeader.setText(headerTitle);

    return convertView;
}

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

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}

}

What context your passing in this adapter's constructor? – mudit_sen May 04 '17 at 12:22 — mudit_sen, May 04 '17 at 12:22
@muditsen1234 `getApplicationContext` – May 04 '17 at 12:23 — , May 04 '17 at 12:23
Pass activity's context or YourActivity.this – mudit_sen May 04 '17 at 12:25 — mudit_sen, May 04 '17 at 12:25
Upvote the answer I just posted if it helps or comment. – mudit_sen May 04 '17 at 12:29 — mudit_sen, May 04 '17 at 12:29

mudit_sen · Accepted Answer · 2017-10-07T19:31:02.173

1

You are probably passing the wrong context in your adapter. Use activity's context instead on applications context.

In Activity

 new ExpandableListAdapter(YourActivity.this,yourList,yourHashMap);

In Fragment

 new ExpandableListAdapter(getActivity(),yourList,yourHashMap);

edited Oct 07 '17 at 19:31

answered May 04 '17 at 12:28

mudit_sen

1,470
15
24

score 0 · Answer 2 · answered May 04 '17 at 12:32

0

Try replacing getApplicationContext with YourActivity.this or getContext() or getActivity() depending on the class in which you are creating adapter object.

E.g.

new ExpandableListAdapter(YourActivity.this, listDataHeader, listChildData);

answered May 04 '17 at 12:32

PEHLAJ

9,980
9
41
53

getFragmentManager() inside class

2 Answers2