Extracting contents of .txt file so I can use it within an android application

Question

Hi I’m working on a help section for my application I plan to store the contents within a .txt file. I’m having some trouble when it comes to extracting the text and using set the text of a TextView. Does anyone have any ideas? Why is the text in the .txt document not being added to the text view.
I’m fairly new to this so sorry if it’s a Noob question. Any help would be appreciated. Thanks in advance.

Here's the code

package com.maths_wizard;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class InstructionActivity extends Activity implements OnClickListener{
@Override

public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState); 
setContentView(R.layout.instruction);
InputStream iFile = getResources().openRawResource(R.raw.help);
         try {
            TextView helpText = (TextView)findViewById(R.id.TextViewHelpText);
             String strFile = inputStreamToString(iFile);
             helpText.setText(strFile);
          } catch (Exception e) {
        }
    }

    public String inputStreamToString(InputStream is) throws
IOException {
         StringBuffer sBuffer = new StringBuffer();
         DataInputStream dataIO = new DataInputStream(is);
         String strLine = "";
         while ((strLine = dataIO.readLine()) != null) {
             sBuffer.append(strLine + "\n");
         }
         dataIO.close();
         is.close();
        return sBuffer.toString();  
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub

    }

 }