[android] RecyclerView with Cursor

RecyclerView is new in Android 5.0 (Lollipop).

To use with support library

add compile 'com.android.support:recyclerview-v7:21.0.0' in build.gradle file

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.0'
    compile 'com.android.support:recyclerview-v7:21.0.0'
}

and import

import android.support.v7.widget.RecyclerView;

Get from layout xml

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycle_list);

Plug in LayoutManager

recyclerView.setLayoutManager(layoutManager);

Create Adapter

NameRecyclerAdapter mAdapter;
...
mAdapter = new NameRecyclerAdapter();

Plug in Adapter

recyclerView.setAdapter(mAdapter);

NameRecyclerViewAdapter.java

import android.database.Cursor;
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 *
 * Recycler Adapter for TestDB
 *
 */
public class NameRecyclerAdapter extends RecyclerView.Adapter {

    private Cursor mCursor;

    @Override
    public NameViewHolder onCreateViewHolder(ViewGroup parent, int position) {
        NameViewHolder vh = new NameViewHolder(new TextView(parent.getContext()));
        return vh;
    }

    @Override
    public void onBindViewHolder(NameViewHolder viewHolder, int position) {
        mCursor.moveToPosition(position);

        ((TextView)(viewHolder.itemView))
            .setText(mCursor.getString(mCursor.getColumnIndex(TestDb.NAME)));
    }

    @Override
    public int getItemCount() {
        if (mCursor != null)
            return mCursor.getCount();
        else return 0;
    }

    /**
     * set DataBase Cursor for Recycler Adapter
     * @param cur
     */
    public void setDataSet(Cursor cur) { mCursor = cur; }
}

set DataSet with Db Cursor asynchronously

    private class LoadTestDbTask extends AsyncTask {
        @Override
        protected TestDb doInBackground(Context... params) {
            return new TestDb(params[0]);
        }

        @Override
        protected void onPostExecute(TestDb testDb) {
            super.onPostExecute(testDb);

            mAdapter.setDataSet(testDb.getNames());
            mAdapter.notifyDataSetChanged();
        }
    }

This sample code is in GitHub.