RandomFileWriter in Andriod

import java.io.File;

import java.io.RandomAccessFile;

import android.os.Environment;

import android.util.Log;

public class RandomFileWriter {

public long writeData(String text,String path,long seek){

try {
// example path : "/data/data/com.example.test/file"

RandomAccessFile file = new RandomAccessFile(path, "rw");

long i=file.length()-seek,j;

Log.i("File length",""+i);

file.seek(i);

file.writeBytes(text);

j=file.getFilePointer();

file.close();

return j;

}catch (Exception e) {

// TODO Auto-generated catch block

Log.d("RandomFileWrite.java","Exception: "+e.getMessage());

return 0;

}

 

}

public void seekWrite(String text,String path,long seek) {

try {

RandomAccessFile file = new RandomAccessFile(path, "rw");

file.seek(seek);

file.writeBytes(text);

file.close();

} catch (Exception e) {

// TODO Auto-generated catch block

Log.d("RandomFileWrite.java seekwrite","Exception: "+e.getMessage());

}

}

String getExternalPath(){

return Environment.getExternalStorageDirectory().toString();

}

boolean isMediaReadOnly(){

String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {

    // We can only read the media

   

  return true;

}

return false;

}

boolean isMediaMounted(){

String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED.equals(state)) {

    // We can read and write the media

    Log.i("Exter", "media found: "+Environment.getExternalStorageDirectory());

  return true;

} 

return false;

}

public void createDir(String path,String dir){

new File(path+dir).mkdir();

}

public void createDir(File dirPath){

dirPath.mkdir();

}

public boolean deleteDir(File dir) {

    if (dir.isDirectory()) {

        String[] children = dir.list();

        for (int i=0; ilength; i++) {

            boolean success = deleteDir(new File(dir, children[i]));

            if (!success) {

                return false;

            }

        }

    }

    // The directory is now empty so delete it

    return dir.delete();

}

public boolean delFile(File f){

return f.delete();

 

}

void copy(File src, File dst) throws Exception{

    // Transfer bytes from in to out

    byte[] buf = new byte[1024];

    int len;

   

    RandomAccessFile in = new RandomAccessFile(src, "r");

RandomAccessFile out = new RandomAccessFile(dst, "rw");

    while ((len = in.read(buf)) > 0) {

        out.write(buf, 0, len);

    }

    in.close();

    out.close();

   

}

}