how to merge two mp3 files and stored it into sdcard?

Question

I tried to merge two mp3 file and I followed using below urls, How to merge two audio mp3 file in android? Concatenating MP3 files How to merge two mp3 files into one (combine/join) Join two WAV files from Java?

I want to merge two mp3 files.

example :

File1 has 25 second long.

File2 has 15 second long.

then output file should be like 25 second long and output file must contains both files audio starting from 0 second.

Here file 1 and file2 is stored in sdcard and both file formate is .mp3 and merged file is also mp3

please find the below code.

File file1=new File(fileName);
File file2=new File(fileName2);
File mergedfile=new File(mergedFile);
mergeSongs(mergedfile, file1,file2);

mergeSongs Function is.

private void mergeSongs(File mergedFile,File file1,File file2){

        try {
            FileInputStream fis1 = new FileInputStream(file1);
            FileInputStream fis2 = new FileInputStream(file2);
            Log.i("merge",file1+" "+file1);
            Toast.makeText(this, file1.toString()+file2.toString(), Toast.LENGTH_LONG).show();
            SequenceInputStream sis = new SequenceInputStream(fis1,fis2);

            if(!mergedFile.exists()){
                mergedFile.createNewFile();}

            FileOutputStream fos = new FileOutputStream(mergedFile);

            int temp;

             while ((temp = sis.read())!= -1){

                    fos.write((byte)temp);

                }

             fis1.close();
             fis2.close();
             sis.close();
             fos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

    }

In merged file I got only file1 data only

i m not able to understand where is the problem.

is this possible using mediaplayer?