GPX decoding in Android, with custom class.

package com.example.androidcodinggpx;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import android.location.Location;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  String path = Environment.getExternalStorageDirectory().toString() + "/temp/test.gpx";
  
  TextView textInfo = (TextView)findViewById(R.id.info);
  String info = "";
  
  File gpxFile = new File(path);
  info += gpxFile.getPath() +"\n\n";
  

  List<GpxNode> gpxList = decodeGPX(gpxFile);

  for(int i = 0; i < gpxList.size(); i++){
   info += gpxList.get(i).getLocationString() + "\n";
  }
  
  textInfo.setText(info);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.activity_main, menu);
  return true;
 }
 
 class GpxNode{
  
  Location location;
  String ele;
  String time;
  
  GpxNode(){
   location = null;
   ele = "";
   time = "";
  }
  
  GpxNode(Location loc){
   location = loc;
   ele = "";
   time = "";
  }
  
  GpxNode(Location loc, String e, String t){
   location = loc;
   ele = e;
   time = t;
  }
  
  void setEle(String e){
   ele = e;
  }
  
  void setTime(String t){
   time = t;
  }
  
  Location getLocation(){
   return location;
  }
  
  String getLocationString(){
   return location.getLatitude() + ":" + location.getLongitude();
  }
  
 }
 
 private List<GpxNode> decodeGPX(File file){
  List<GpxNode> list = new ArrayList<GpxNode>();

  DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
  try {
   DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
   FileInputStream fileInputStream = new FileInputStream(file);
   Document document = documentBuilder.parse(fileInputStream);
   Element elementRoot = document.getDocumentElement();
   
   NodeList nodelist_trkpt = elementRoot.getElementsByTagName("trkpt");

   for(int i = 0; i < nodelist_trkpt.getLength(); i++){
    
    Node node = nodelist_trkpt.item(i);
    NamedNodeMap attributes = node.getAttributes();
    
    String newLatitude = attributes.getNamedItem("lat").getTextContent();
    Double newLatitude_double = Double.parseDouble(newLatitude);
    
    String newLongitude = attributes.getNamedItem("lon").getTextContent();
    Double newLongitude_double = Double.parseDouble(newLongitude);
    
    String newLocationName = newLatitude + ":" + newLongitude;
    Location newLocation = new Location(newLocationName);
    newLocation.setLatitude(newLatitude_double);
    newLocation.setLongitude(newLongitude_double);
    
    GpxNode newGpxNode = new GpxNode(newLocation);
    list.add(newGpxNode);

   }
   
   fileInputStream.close();
   
  } catch (ParserConfigurationException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (SAXException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  return list;
 }

}