Android How to Record Music from Media Player

I am working on a project where I am playing music over url using android build in media player. What I want to achieve is the ability to save streaming data to a file on the SD card. I tried to do it with Android build in media recorder, but it records everything around the phone, not just the audio coming from the media player.

So my question is, is this the best way to achieve this?

Here is an example that I already tested, but after that I cannot play the mp3 file to check if everything is ok:

Log.e("URL AGAIN","url : "+url);
            try {
                if(!isrecording){

                    URL urlStream = new URL(url);
                    InputStream inputStream = urlStream.openStream();
                    Log.d("", "urlStream.openStream()");

                    String filename = Environment.getExternalStorageDirectory().getAbsolutePath();
                    filename += "/deliciousradio.mp3";

                    File outputSource= new File(filename);
                    fileOutputStream = new FileOutputStream(outputSource);
                    Log.d("", "FileOutputStream: " + outputSource);

                    int bytesRead = -1;
                    isrecording = true;

                    byte[] buffer = new byte[30 * 1024];
                    while ((bytesRead = inputStream.read(buffer)) > 0) {

                        byte[] buffer2 = new byte[bytesRead];
                        fileOutputStream.write(buffer2);

                        Log.d("","bytes size :"+buffer2.length);
                        Log.d("","bytesRead : "+bytesRead);

                    }


                } else if(isrecording){
                    fileOutputStream.close();
                }
            } catch(Exception e){}

      

The problem is that I get 30 as the length of buffer2 and I cannot explain why.

Thanks for any help!

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    Button recstart, recstop,replay;
//onCreate
File f;
    File externalStorage;
    String path = "";
    MediaRecorder recorder;
    Timer time;
    String filename1 = "";
    boolean s = false;
externalStorage = Environment.getExternalStorageDirectory();
        String sdCardPath = externalStorage.getAbsolutePath();
        recorder = new MediaRecorder();
        path = sdCardPath + "/";

recstart.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                String state = android.os.Environment.getExternalStorageState();
                if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
                    try {
                        throw new IOException("SD Card is not mounted.  It is "
                                + state + ".");
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }

                Date dt = new Date();
                int hours = dt.getHours();
                int minutes = dt.getMinutes();
                int seconds = dt.getSeconds();
                String curTime = hours + "_" + minutes + "_" + seconds;

                filename1 = "phonecall_at" + curTime + ".mp4";
                if (recorder == null) {
                    recorder = new MediaRecorder();
                }

                f = new File(path, filename1);
                try {
                    s = f.createNewFile();

                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    // Toast.makeText(AudioRecording.this,"hiiiii...."+e1.getMessage(),2000).show();
                    e1.printStackTrace();
                }
                // MediaRecorder.AudioSource.VOICE_CALL +
                // MediaRecorder.AudioSource.MIC
                // recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_UPLINK
                // + MediaRecorder.AudioSource.VOICE_DOWNLINK );
                if (s == true) {
                    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
                    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

                    recorder.setOutputFile(f.getAbsolutePath());
                    // record.setText("stop");
                    // record.setBackgroundColor( Color.BLUE);
                    // Toast.makeText(AudioRecording.this, String.valueOf(s),
                    // 3000).show();
                    try {
                        recorder.prepare();
                        Toast.makeText(AudioRecording.this, "Recording starts",
                                5000).show();
                    } catch (IllegalStateException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                        Log.e(".................................",
                                "" + e.toString());
                    }
                    recorder.start();
                } else {
                    Toast.makeText(getApplicationContext(),
                            "No space Left on device", 2000).show();
                }
                /*
                 * try { recorder.prepare(); Toast.makeText(Recordingvoice
                 * .this,"Recording starts",5000).show(); recorder.start();
                 * 
                 * 
                 * } catch (IllegalStateException e) { // TODO Auto-generated
                 * catch block e.printStackTrace(); } catch (IOException e) { //
                 * TODO Auto-generated catch block // e.printStackTrace(); }
                 */
            }
        });
recstop.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                if (s == true) {
                    Toast.makeText(AudioRecording.this, "Recording stopped",
                            2000).show();
                    if (recorder == null) {
                        recorder = new MediaRecorder();
                    }
                    if (recorder != null) {
                        recorder.stop();
                        recorder.release();
                    }
                    recorder = null;
                    // time.cancel();
                    // uploadCode();
                }

            }
        });
replay.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                // TODO Auto-generated method stub

                if (f.exists()) {
                    Toast showMsg = Toast.makeText(getApplicationContext(), "Playing", Toast.LENGTH_SHORT);
                    showMsg.show();
                    String path = f.getAbsolutePath();
                    Uri myUri = Uri.parse(path);
                    MediaPlayer mp = new MediaPlayer();
                    mp.setLooping(false);
                    mp = MediaPlayer.create(AudioRecording.this, myUri);
                    mp.start();
                }
            }
        });

      



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