Delete an item from the listview and realm

Question

I'm trying to delete an item from listview (arrayadapter) when delete button is clicked but it crashes after it's being deleted from the realm database.

 @Override
    public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        realm = Realm.getDefaultInstance();

        View listItemView = convertView;

        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(R.layout.meditations_list_item, parent, false);
        }

        Reminder reminder = getItem(position);

        TextView reminderHour = listItemView.findViewById(R.id.hour_tv);
        final ImageView deleteBtn = listItemView.findViewById(R.id.delete_btn);
        deleteBtn.setTag(position);
        final View finalListItemView = listItemView;
        deleteBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                final Integer index = (Integer) deleteBtn.getTag();
                Reminder deletedReminder = getItem(index);
                if (deletedReminder == null) {
                    Toast.makeText(getContext(), "Error in deleting!", Toast.LENGTH_SHORT).show();
                    return;
                }

                String id = deletedReminder.getId();
                realm.beginTransaction();
                RealmResults<Reminder> reminderObjs = realm.where(Reminder.class)
                        .equalTo("id", id)
                        .findAll();
                boolean isDeleted = reminderObjs.deleteAllFromRealm();
                realm.commitTransaction();
                notifyDataSetChanged();
                Log.d(TAG, "execute: " + isDeleted);


            }
        });


        reminderHour.setText(reminder.getHours());

        return listItemView;
    }

I'm using this code now to delete the item it's working but I think this code may cause in performance issue :

        clear();
        addAll(new ArrayList<Reminder>(realm.where(Reminder.class).findAll()));
        notifyDataSetChanged();

Please provide more information on what exactly it is you want to achieve. What is the result of which function or variable you want to have? — Socrates, May 19 '18 at 22:25
Why are you using `ArrayAdapter` when you could be using [RealmBaseAdapter](https://github.com/realm/realm-android-adapters/blob/ce136df1280272abda8e132df0116d10eae7d815/adapters/src/main/java/io/realm/RealmBaseAdapter.java) which handles this automatically?? — EpicPandaForce, May 19 '18 at 23:58
Thanks EpicPandaForce! I've begun using (RealmBaseAdapter) and it's awesome. — Muslem Omar, May 20 '18 at 07:40

score 1 · Accepted Answer · answered May 20 '18 at 07:42

1

I've used RealmBaseAdapter instead.

answered May 20 '18 at 07:42

Muslem Omar

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Delete an item from the listview and realm

1 Answers1