Alertdialog builder with text file reader

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Java

Mobile

Android

I have a listview, when clicked opens a dialog and i also have
a code that reads text file from assets/raw folder.
What i really want to achieve is to read each text files in dialog
i.e whenever a user clicks on list item it opens a text files for each
listview item. NB am having 10 different text files in my assets/raw folder
How can i combine both codes together to achieve this
See the code below

Activity with listviews and dialog

public class KneelingDown extends ActionBarActivity {

    // List view
    private ListView lv;
    private Toolbar toolbar;

    // Listview Adapter
    ArrayAdapter<string> adapter;
    private ListView listView;
    private MyAdapter myAdapter;
    Context context;

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

        toolbar = (Toolbar) findViewById(R.id.tool_bar);
        setSupportActionBar(toolbar);

        //Part of cardview code starts here
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerList);
        LinearLayoutManager llm = new LinearLayoutManager(this);
        llm.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(llm);

        recyclerView.setAdapter(new MyRecyclerAdapter(generatePalettes()));

        recyclerView.addOnItemTouchListener(
                new RecyclerItemClickListener(context, new RecyclerItemClickListener.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                        switch (position) {
                            case 0:
                                AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                                        KneelingDown.this);

                                // set title
                                alertDialogBuilder.setTitle("Yah Rah man Hi");
                                alertDialogBuilder.setIcon(R.mipmap.ic_launcher);
                                // set dialog message
                                alertDialogBuilder
                                        .setMessage("Text file content here ")
                                        .setCancelable(false)
                                        .setPositiveButton("Cancel", new DialogInterface.OnClickListener() {
                                            public void onClick(DialogInterface dialog, int id) {
                                                // if this button is clicked, close
                                                // current activity

                                            }
                                        });

                                // create alert dialog
                                AlertDialog alertDialog = alertDialogBuilder.create();

                                // show it
                                alertDialog.show();
                                break;
                            case 1:
                                AlertDialog.Builder alertDialogBuilder1 = new AlertDialog.Builder(
                                        KneelingDown.this);

                                // set title
                                alertDialogBuilder1.setTitle("O Christ Oh my king");
                                alertDialogBuilder1.setIcon(R.mipmap.ic_launcher);
                                // set dialog message
                                alertDialogBuilder1
                                        .setMessage("Text file content here ")
                                        .setCancelable(false)
                                        .setPositiveButton("Cancel", new DialogInterface.OnClickListener() {
                                            public void onClick(DialogInterface dialog, int id) {
                                                // if this button is clicked, close
                                                // current activity

                                            }
                                        });

                                // create alert dialog
                                AlertDialog alertDialog1 = alertDialogBuilder1.create();

                                // show it
                                alertDialog1.show();
                                break;
                        }
                    }
                })
        );
        //Ends here

    }

    //Remaining part of CardView Starts Here
    private ArrayList<palette> generatePalettes() {
        ArrayList<palette> palettes = new ArrayList<palette>();
        palettes.add(new Palette("Hymn 003 Yah Rah man Hi", R.mipmap.ic_launcher));
        palettes.add(new Palette("Hymn 004 O Christ Oh my king", R.mipmap.ic_launcher));
        return palettes;
    }

Activity with reading text files

public class MainActivity extends ActionBarActivity {

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

        TextView textView = (TextView)findViewById(R.id.textview_data);

        String data = readTextFile(this, R.raw.fixures);
        textView.setText(data);
    }

    public static String readTextFile(Context ctx, int resId)
    {
        InputStream inputStream = ctx.getResources().openRawResource(resId);

        InputStreamReader inputreader = new InputStreamReader(inputStream);
        BufferedReader bufferedreader = new BufferedReader(inputreader);
        String line;
        StringBuilder stringBuilder = new StringBuilder();
        try
        {
            while (( line = bufferedreader.readLine()) != null)
            {
                stringBuilder.append(line);
                stringBuilder.append('\n');
            }
        }
        catch (IOException e)
        {
            return null;
        }
        return stringBuilder.toString();
    }

Kindly help