android - 使用 Realm 库获取光标

Question

我正在为我的 ListView 使用游标适配器。我打算使用内容解析器来获取光标。现在我改变了主意，给它一个学习 Realm 的机会。

如何使用 Realm 获取“光标”对象？顺便说一句，我也很感激能提供一些 fragment 来对光标进行排序。

谢谢。

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

这里是来自 Realm 的 Christian。 Realm 目前没有公开 Cursor，尽管这是我们想要做的事情:https://github.com/realm/realm-java/issues/438

如果您想将 RecyclerView 与 Realm 一起使用，我会推荐这篇博文以获取有关如何集成它们的建议:http://gradlewhy.ghost.io/realm-results-with-recyclerview/