my recycler view isn't populated wat do

activity_notes_list.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".NotesListActivity">

    <android.support.v7.widget.RecyclerView
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:id="@+id/listView"
        android:divider="@null"
        android:dividerHeight="0dp"
        android:paddingLeft="4dp"
        android:paddingRight="4dp"
        android:fastScrollEnabled="true" />

</RelativeLayout>

Note.java

package net.rymate.rymatenotes2;

/**
 * Created by Ryan on 01/01/2015.
 */
public class Note {
    private int id;
    private String title;
    private String content;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}

Notes.java

package net.rymate.rymatenotes2;

import com.google.gson.JsonObject;
import com.koushikdutta.async.future.FutureCallback;

import java.util.List;

/**
 * Created by Ryan on 01/01/2015.
 */
public class Notes {

    private List<Note> notes;

    public Notes(List<Note> notes) {
        this.notes = notes;
    }

    public List<Note> getNotes() {
        return notes;
    }

    public void setNotes(List<Note> notes) {
        this.notes = notes;
    }
}

notes_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginBottom="4dp"
    android:clickable="true"
    android:elevation="2dp"
    android:minHeight="?android:attr/listPreferredItemHeight"
    android:foreground="?android:attr/selectableItemBackground"
    android:mode="twoLine"
    card_view:cardCornerRadius="2dp">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="6dp"
        android:orientation="vertical">
        <TextView xmlns:app="http://schemas.android.com/apk/res-auto"
            android:id="@+id/title_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:maxLines="1"
            android:textAppearance="?android:attr/textAppearanceLarge" />
        <TextView xmlns:app="http://schemas.android.com/apk/res-auto"
            android:id="@+id/content_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:maxLines="3"
            android:textAppearance="?android:attr/textAppearanceSmall"/>
    </LinearLayout>
</android.support.v7.widget.CardView>

NotesListActivity.java

package net.rymate.rymatenotes2;

import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Base64;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.koushikdutta.ion.Ion;

import java.util.concurrent.ExecutionException;


public class NotesListActivity extends Activity implements RecyclerNotesAdapter.OnItemClickListener {

    private RecyclerView mNotesRecycler;
    private RecyclerNotesAdapter adapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_notes_list);

        mNotesRecycler = (RecyclerView) findViewById(R.id.listView);

        String credentials = "rymate1234" + ":" + "passw0rd";
        String base64EncodedCredentials = Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);

        JsonObject json = null;

        try {
            json = Ion.with(this)
                    .load("http://dev.rymate.co.uk:5000/api/notes")
                    .setHeader("Authorization", "Basic " + base64EncodedCredentials)
                    .asJsonObject().get(); // gets a json file like https://gist.github.com/rymate1234/6c9a635f55a53e6652dd
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

        Gson gson = new Gson();
        Notes notes = gson.fromJson(json.toString(), Notes.class);
        adapter = new RecyclerNotesAdapter(notes);
        adapter.SetOnItemClickListener(this);
        mNotesRecycler.setAdapter(adapter);
        mNotesRecycler.setHasFixedSize(true);
        mNotesRecycler.setLayoutManager(new LinearLayoutManager(this));
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.notes_list, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_login) {
            // this will do something eventually
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onItemClick(View view, int position) {
        return;
    }
}

RecyclerNotesAdapter.java

package net.rymate.rymatenotes2;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

/**
 * Created by Ryan on 01/01/2015.
 */
public class RecyclerNotesAdapter extends RecyclerView.Adapter<RecyclerNotesAdapter.ListItemViewHolder> {
    private List<Note> notes;
    private OnItemClickListener mItemClickListener;

    public RecyclerNotesAdapter(Notes notes) {
        if (notes == null) {
            throw new IllegalArgumentException("modelData must not be null");
        }
        this.notes = notes.getNotes();
    }


    @Override
    public ListItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int position) {
        View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.notes_list_item, viewGroup, false);

        return new ListItemViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(ListItemViewHolder viewHolder, int position) {
        Note note = notes.get(position);
        viewHolder.title.setText(note.getTitle());
        viewHolder.text.setText(note.getContent());
        viewHolder.id = note.getId();
    }

    @Override
    public int getItemCount() {
        return notes.size();
    }

    public class ListItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView title, text;
        int id;

        public ListItemViewHolder(View itemView) {
            super(itemView);
            title = (TextView) itemView.findViewById(R.id.title_text);
            text = (TextView) itemView.findViewById(R.id.content_text);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            if (mItemClickListener != null) {
                mItemClickListener.onItemClick(v, id);
            }
        }
    }

    public interface OnItemClickListener {
        public void onItemClick(View view, int position);
    }

    public void SetOnItemClickListener(final OnItemClickListener mItemClickListener) {
        this.mItemClickListener = mItemClickListener;
    }
}

<android.support.v7.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/listView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".NotesListActivity"
    />