NullPointer Exception While Doing Search Feature for ListView With BaseAdapter

Question

I just finished adding a search feature to my android widget to search through a list of the users installed applications. My app installs fine and everything but when I go to s

Answer 1

Add this code before for loop:

if (constraint.length() == 0) {
myFilteredAppList.addAll(originalListAppInfo);
} 

i.e

@Override
    public Filter getFilter() {
        if(filter == null) {
            filter = new Filter() {
                @Override
                protected FilterResults performFiltering(CharSequence constraint) {
                    FilterResults results = new FilterResults();
                    List myFilteredAppList = new ArrayList();
                    constraint = constraint.toString().toLowerCase();

                     if (constraint.length() == 0) {
                         myFilteredAppList.addAll(originalListAppInfo);
                        } 

                    for (ApplicationInfo appInfo : originalListAppInfo) {
                        String somefield = appInfo.name;
                        if (somefield.toLowerCase().contains(constraint.toString())) {
                            myFilteredAppList.add(appInfo);
                        }
                    }
                    results.count = myFilteredAppList.size();
                    results.values = myFilteredAppList;
                    return results;
                }

                @Override
                protected void publishResults(CharSequence constraint, FilterResults results) {
                    mListAppInfo = (List)results.values;
                    notifyDataSetChanged();
                }
            };
        }
        return filter;
    }