保存来自其他android java的新声音

Question

原始文件夹中有3个声音sound1.mp3 sound.mp3，sound3.mp3可以保存在android java中sdcard的单个文件中

sound1 + sound2 + sound3 ---＆gt; soundnew

byte[] bitmapdata = baf.toByteArray();
File file = new File(Environment.getExternalStorageDirectory(), music1.mp3);
FileOutputStream fos;
try {
    fos = new FileOutputStream(file);
    fos.write(bitmapdata ); 
    fos.flush(); 
    fos.close(); 
} catch (FileNotFoundException e) {
    // handle exception 
} catch (IOException e) {
    // handle exception 
}