Get cursor by using Realm library

Question

I am using cursor adapter for my list view. I was planning to use content resolvers to get a cursor. Now i changed my mind to give it a chance to learn Realm.

How can i get "Cursor" object by using realm? By the way, i would also be appreciate give a few snippet to sort cursor.

Thanks.

final class Contact extends RealmObject {

private CharSequence mName;


public CharSequence getName() {
    return mName;
}

public void setName(CharSequence name) {
    this.mName = name;
}

}

final class ContactListAdapter extends CursorRecyclerViewAdapter<ContactListAdapter.ContactHolder> implements View.OnClickListener {

private OnContactClickListener mListener;


public ContactListAdapter(Context context, Cursor cursor) {
    super(context, cursor);
}

@Override
public ContactHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = getLayoutInflater().inflate(R.layout.cell_contact, parent, false);

    ContactHolder contactHolder = new ContactHolder(itemView);
    contactHolder.mContactPhotoImageView.setOnClickListener(this);

    return contactHolder;
}

@Override
public void onBindViewHolder(ContactHolder viewHolder, Cursor cursor) {
    viewHolder.mNameTextView.setText("Emre Akturk");

    int position = cursor.getPosition();
    viewHolder.mContactPhotoImageView.setImageResource(R.mipmap.ic_launcher);
    viewHolder.mContactPhotoImageView.setTag(position);
}

@Override
public int getItemCount() {
    return 5;
}

public void setOnContactClickListener(OnContactClickListener callback) {
    this.mListener = callback;
}

@Override
public void onClick(View v) {
    if (mListener == null) {
        return;
    }

    int position = (int) v.getTag();
    if (position == -1) {
        mListener.onContactCallClicked(v, getCursor(), position);
    } else {
        mListener.onContactAddClicked(v, position);
    }
}

public interface OnContactClickListener {
    void onContactCallClicked(View v, Cursor cursor, int position);

    void onContactAddClicked(View v, int position);
}

protected class ContactHolder extends RecyclerView.ViewHolder {
    private TextView mNameTextView;
    private CircleImageView mContactPhotoImageView;

    protected ContactHolder(View itemView) {
        super(itemView);
        mNameTextView = (TextView) itemView.findViewById(R.id.cell_contact_name_textview);
        mContactPhotoImageView = (CircleImageView) itemView.findViewById(R.id.cell_contact_photo_imageview);
    }
}

}

Answer 1

Christian from Realm here. Realm currently doesn't expose a Cursor although it is something we want to do: https://github.com/realm/realm-java/issues/438

If you want to use a RecyclerView with Realm I would recommend this blogpost for advice on how to integrate them: http://gradlewhy.ghost.io/realm-results-with-recyclerview/