FileUtils.java :  » UnTagged » privatewificonnect » test » application » com » by » david » agrest » Android Open Source

package test.application.com.by.david.agrest;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.content.Context;
import android.os.Environment;
import android.provider.OpenableColumns;
import test.application.com.by.david.agrest.ErrorMessages.errorMessages;

//http://androidgps.blogspot.com/2008/09/writing-to-sd-card-in-android.html
//http://www.anddev.org/viewtopic.php?p=13574

public class FileUtils {
  Context context = null;
  private errorMessages result = errorMessages.FAILED;
  private String fileName = null;

  public FileUtils(Context context, String fileName){
    this.context = context;
    this.fileName = fileName;
  }
  
  public errorMessages createFile(){
    if(fileName == null){
      return result = errorMessages.FILE_NAME_IS_EMPTY;
    }
    errorMessages result = isMediaAvailabe();
    if(result == errorMessages.SUCCESS){
      FileOutputStream fos;
      try {
        fos = context.openFileOutput(fileName, context.MODE_WORLD_WRITEABLE);
        fos.write("".getBytes());
        fos.close();
      } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
    return result;
  }
  
  public errorMessages appendToFile(String message){
    if(fileName == null){
      return result = errorMessages.FILE_NAME_IS_EMPTY;
    }
    errorMessages result = isMediaAvailabe();
    if(result == errorMessages.SUCCESS){
      FileOutputStream fos;
      try {
        fos = context.openFileOutput(fileName, context.MODE_APPEND);
        fos.write(message.getBytes());
        fos.close();
      } catch (FileNotFoundException e) {
        // TODO write exception to LOG
        //e.printStackTrace();
        result = errorMessages.FILE_NOT_FOUND_EXCEPTION;
      } catch (IOException e) {
        // TODO write exception to LOG
        //e.printStackTrace();
        result = errorMessages.IO_EXCEPTION;
      }
    }
    return result;
  }
  
  public errorMessages isMediaAvailabe(){
    //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;
        result = errorMessages.SUCCESS;
    } else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
        // We can only read the media
        //mExternalStorageAvailable = true;
        //mExternalStorageWriteable = false;
        result = errorMessages.MEDIA_MOUNTED_READ_ONLY;
    } 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;
        result = errorMessages.EXTERNAL_STORAGE_UNAVAILABLE;
    }
    
    return result;
  }
}