使用 Realm 库获取光标 [英] Get cursor by using Realm library

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本文介绍了使用 Realm 库获取光标的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我在列表视图中使用游标适配器.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.

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.

如何使用领域获得 光标" 对象?顺便说一句,我也很感激提供一些片段来对光标进行排序.

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

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);
    }
}

}

推荐答案

来自 Realm 的 Christian 在这里.Realm 目前不公开 Cursor,尽管这是我们想做的事情:https://github.com/realm/realm-java/issues/438

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

如果你想在 Realm 中使用 RecyclerView,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/

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/

这篇关于使用 Realm 库获取光标的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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