Leer archivos de texto

This is my rifle. There are many like it, but this one is mine.
My rifle is my best friend. It is my life. I must master it as I must master my life.
My rifle, without me, is useless. Without my rifle, I am useless. I must fire my rifle true. I must shoot straighter than my enemy who is trying to kill me. I must shoot him before he shoots me. I will...
My rifle and I know that what counts in this war is not the rounds we fire, the noise of our burst, nor the smoke we make. We know that it is the hits that count. We will hit...
My rifle is human, even as I, because it is my life. Thus, I will learn it as a brother. I will learn its weaknesses, its strength, its parts, its accessories, its sights and its barrel. I will keep my rifle clean and ready, even as I am clean and ready. We will become part of each other. We will...
Before God, I swear this creed. My rifle and I are the defenders of my country. We are the masters of our enemy. We are the saviors of my life.
So be it, until victory is America's and there is no enemy, but peace!

Este es mí fusil, hay otros muchos pero este es el mío.
Mi fusil es mi mejor amigo, y es mi vida, 
tengo que dominarlo igual que me domino a mi mismo. 
Sin mí mi fusil no sirve, sin mi fusil yo tampoco sirvo. 
Tengo que acertar con mi fusil, tengo que disparar a dar al enemigo que quiere matarme, 
tengo que darle antes de que me de a mi, lo haré. 
Esto que digo lo juro ante Dios, mi fusil y yo somos los defensores de mi patria, 
dominamos a nuestros enemigos y salvamos nuestras propias vidas.
Así sea, hasta que en vez de enemigos haya paz. 
Amén.

package com.tutorial.oracionamifusil;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class FusilActivity extends Activity {

 //code here

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

  //code here
 }

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

}

package com.tutorial.oracionamifusil;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.os.Bundle;
import android.app.Activity;
import android.content.res.AssetManager;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class FusilActivity extends Activity implements OnClickListener{

    Button buton_espanol, buton_ingles;
 TextView textView;

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

  //controles
  buton_espanol = (Button) findViewById( R.id.btnEspanol );
  buton_ingles = (Button) findViewById( R.id.btnIngles );
  textView = (TextView) findViewById( R.id.txtOracion );  
  //Listener
  buton_espanol.setOnClickListener(this);
  buton_ingles.setOnClickListener(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.fusil, menu);
  return true;
 }

 //New code

 @Override
 public void onClick( View arg0 ) {
  //dependiendo que boton se presione abre archivo en ingles o español
  switch ( arg0.getId() ) 
  {
   case R.id.btnEspanol : 
    leer( "archivos/espanol/oracion.txt" );    
    break;
   case R.id.btnIngles : 
    leer( "archivos/ingles/oracion.txt" );    
    break;
  }
 }

 /** Metodo para leer archivo de texto 
 * @param archivo Ruta del archivo de texto en la carpeta ASSETS
 * */
 public void leer( String archivo )
 {  
  AssetManager assetManager = getAssets();
  InputStream inputStream = null;
  try {
   inputStream = assetManager.open( archivo );
   String text = btoString( inputStream );
   textView.setText( text );
  } catch (IOException ex) {
   textView.setText( ex.getMessage() );
  }
  finally{
   if( inputStream != null )
   {
    try{
     inputStream.close();
    }
    catch( IOException ex )
    {
     textView.setText( ex.getMessage() );
    }
   }
  }
 }

 /** Convierte bytes en texto
 * @param inputStream de tipo InputStream
 * */
 public String btoString( InputStream inputStream ) throws IOException
 {  
  ByteArrayOutputStream b = new ByteArrayOutputStream();
  byte[] bytes = new byte[4096];
  int len=0;  
  while ( (len=inputStream.read(bytes))>0 )
  {
   b.write(bytes,0,len);   
  }
  return new String( b.toByteArray(),"UTF8");
 } 
 //end: New code

}