source: trunk/TagTracker/src/nl/powercraft/tagtracker/FileHandler.java

package nl.powercraft.tagtracker;


import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

import android.os.Environment;
import android.util.Log;

public class FileHandler {
        
        public boolean init()
        {
                boolean mExternalStorageAvailable = false;
                boolean mExternalStorageWriteable = false;
                String state = Environment.getExternalStorageState();

                if (Environment.MEDIA_MOUNTED.equals(state)) {
                    // We can read and write the media
                    mExternalStorageAvailable = mExternalStorageWriteable = true;
                } else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
                    // We can only read the media
                    mExternalStorageAvailable = true;
                    mExternalStorageWriteable = false;
                } else {
                    // Something else is wrong. It may be one of many other states, but all we need
                    //  to know is we can neither read nor write
                    mExternalStorageAvailable = mExternalStorageWriteable = false;
                }               
                
                if(mExternalStorageAvailable && mExternalStorageWriteable)
                {
                        File root = new File(Environment.getExternalStorageDirectory(), "TagTracker");
                        if (!root.exists()) {
                    root.mkdirs();
                }
                        return true;
                }
                else
                {
                        return false;
                }
        }
        public void writeUID(String uid, String time)
        {
                try {
                        File root = new File(Environment.getExternalStorageDirectory(), "TagTracker");
                    File xmlfile = new File(root, "tags.xml");
                    FileWriter writer = new FileWriter(xmlfile,true);
                        String tag = 
                                "       <tag uid=\"" + uid + "\">\r\n" +
                                "               <time>" + time + "</time>\r\n" +
                                "       </tag>\r\n";
                writer.append(tag);
                writer.flush();
                writer.close(); 
                } catch (IOException e) {
                        Log.e("TagTracker", "" + e.getMessage());
                }
                
        }
        
        public void writeNote(String note)
        {
                try {
                        File root = new File(Environment.getExternalStorageDirectory(), "TagTracker");
                    File xmlfile = new File(root, "tags.xml");
                    FileWriter writer = new FileWriter(xmlfile,true);
                        String tag = 
                                "       <note>\r\n" +
                                "       " + note +
                                "       <note>\r\n";
                writer.append(tag);
                writer.flush();
                writer.close(); 
                } catch (IOException e) {
                        Log.e("TagTracker", "" + e.getMessage());
                }
                
        }
        public void writeStart(String starttime)
        {
                try
            {
                        File root = new File(Environment.getExternalStorageDirectory(), "TagTracker");
                    File xmlfile = new File(root, "tags.xml");
                    FileWriter writer = new FileWriter(xmlfile,false);
                String start = 
                                "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n" +
                                "<tags>\r\n" +
                                "       <start time=\""+starttime+"\" />\r\n";
                //Log.i("TagTracker", "Writing start...");
                writer.write(start);
                //Log.i("TagTracker", "Wrote start...");
                writer.flush();
                writer.close();
            }
            catch(IOException e)
            {
                 Log.e("TagTracker", ""+ e.getMessage());
            }           
        }
        public void writeEnd(String endtime)
        {
                try
            {
                        File root = new File(Environment.getExternalStorageDirectory(), "TagTracker");
                    File xmlfile = new File(root, "tags.xml");
                    FileWriter writer = new FileWriter(xmlfile,true);
                String end =
                                "       <end time=\""+endtime+"\" />\r\n" +
                                "</tags>";
                //Log.i("TagTracker", "Writing end...");
                writer.append(end);
                //Log.i("TagTracker", "Wrote end...");
                writer.flush();
                writer.close();
            }
            catch(IOException e)
            {
                 Log.e("TagTracker", ""+ e.getMessage());
            }           
        }
}