Develop Reference

Using multiple audio sources for a media player in Android Studio

I want to create a media player with multiple sounds and play one at random when a button is clicked.
I tried using the MediaPlayer.create() function but I can only set one audio source.
I also tried using the setDataSource() function but this only seems to work for resources that are stored outside the application (as far as I know).
String meowsounds[] = new String[]{
"R.raw.meowcat1",
"R.raw.meowcat2",
"R.raw.meowcat3",
"R.raw.meowcat4",
"R.raw.meowcat5",
};
MediaPlayer mp = new MediaPlayer();
meow.setOnClickListener((view) ->{
Random random = new Random();
int r = random.nextInt(6-1) + 1;
try{
mp.setDataSource(meowsounds[r]);
mp.prepare();
mp.start();
}catch(Exception e){e.printStackTrace();}
});
This code doesn't give any error while running but doesn't play anything on click
EDIT: Updated code which works on first click but not on subsequent clicks:
meow.setOnClickListener((view) ->{
Random random = new Random();
int r = random.nextInt(6-1) + 1;
Toast.makeText(MainActivity.this,Integer.valueOf(r).toString(),Toast.LENGTH_SHORT).show();
try{
if(r==1)
fileDescriptor = MainActivity.this.getResources().openRawResourceFd(R.raw.meowcat1);
else if (r==2)
fileDescriptor = MainActivity.this.getResources().openRawResourceFd(R.raw.meowcat2);
else if (r==3)
fileDescriptor = MainActivity.this.getResources().openRawResourceFd(R.raw.meowcat3);
else if (r==4)
fileDescriptor = MainActivity.this.getResources().openRawResourceFd(R.raw.meowcat4);
else
fileDescriptor = MainActivity.this.getResources().openRawResourceFd(R.raw.meowcat5);
mp.setDataSource(fileDescriptor.getFileDescriptor(), fileDescriptor.getStartOffset(), fileDescriptor.getLength());
mp.prepare();
mp.start();
}catch(Exception e){e.printStackTrace();}
});

R - is the class with constants. "R.raw.meowcat1" - is the simple string and it is not constant which consider link to file.
First, you need to create int array of raw constants, but not string array of simple strings.
Second, If you want to play file from raw, you need to create AssetFileDescriptor for this raw file and use in setDataSource method. For example:
AssetFileDescriptor fileDescriptor = getContext().getResources().openRawResourceFd(R.raw.meowcat1);
mediaPlayer.setDataSource(fileDescriptor.getFileDescriptor(), fileDescriptor.getStartOffset(), fileDescriptor.getLength());
And don't forget please release codec in onDestroy method.

playing android audio from a specified time

How can i play audio from a specified time ?
I have a prerecorded audio and i want to play it from a specific time to a specific time.
I have tried seekTo function in MediaPlayer but it doesnt seem to work.
mPlayer = new MediaPlayer();
try{
mPlayer.setDataSource(PATH_FILE + selectedAudio);
mPlayer.prepare();
mPlayer.seekTo(2);
mPlayer.start();
}catch(IOException ioe){
System.out.println("Error in startPlaying method");
}
Thanks in advance

Audio Stream Not playing in smart phone

Iam trying to built an android application for playing online radio. The code is working in emulator properly. but when installed in phone it does not works.
MediaPlayer mediaPlayer = new MediaPlayer();
String url = "http://5293.live.streamtheworld.com:3690/JACK2_LOWAAC_SC";
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(url);
mediaPlayer.prepare(); // might take long! (for buffering, etc)
mediaPlayer.start();
Is there any problem in the link format? I tried to play same link in html5 its working fine on desktop but the same website when opened in phone the link is not working. Also are there any issues or any components in html5 which do not work in smart phones bu work on Desktop ?
I need to play the live stream not the static file like mp3. You can take some URL form www.listenlive.eu/uk.html and try to play.The URL in my code is form this site only. download the VLC file and open it with any text editor and you will get url.

use mediaPlayer.prepareAsync(); instead of mediaPlayer.prepare(); since your are streaming from web and also add permission for internet
<uses-permission android:name="android.permission.INTERNET"/>
Also
String url = "http://5293.live.streamtheworld.com:3690/JACK2_LOWAAC_SC";
doesn't work for me instead i use
final String url = "http://vprmix.streamguys.net/vprmix64.mp3";
private boolean isPLAYING = false;
public void streamAudio(String url) {
if (!isPLAYING) {
isPLAYING = true;
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(url);
mediaPlayer.prepareAsync();
mediaPlayer.start();
} catch (IOException e) {
e.printStackTrace();
Log.e("mediaPlayer", "prepare() failed");
}
} else {
isPLAYING = false;
stopPlaying();
}
}
private void stopPlaying() {
mediaPlayer.release();
mediaPlayer = null;
}

How to see the tittle/artist of a radio audio that is being played with MediaPlayer?

I made a program that connects to a radio and plays its audio using MediaPlayer. I want to print the artist, song title ... but I do not know how.
I tried to do this with MediaStore.Audio.Media.ARTIST, the but it didn't work, because I can't "link" the uri with the MediaStore, so when I used this command it searched in my SD target for music.
After that, I tried to do this with MetaMediadataRetriever with:
private void play() {
textView.setText("Conectando con la radio......");
Uri myUri = Uri.parse("http://streamingraddios.com:9169");
try {
if (mp == null) {
this.mp = new MediaPlayer();
} else {
mp.stop();
mp.reset();
}
mp.setDataSource(this, myUri);
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
// mmr.setDataSource(this, myUri);
//String ton= mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.setOnPreparedListener(this);
mp.setOnBufferingUpdateListener(this);
mp.setOnErrorListener(this);
mp.prepareAsync();
Log.d(TAG, "LoadClip Done");
} catch (Throwable t) {
Log.d(TAG, t.toString());
}
}
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
textView.setText("");
textView.setText("Hola: " +ton);
}
But the application doesn't respond anymore (without closing the app) when connect with the URI with the variable mediametadataretriever . I think the problem is "context", do anyone know what is it? I don't know how to inicialize this variable.
Anyone can help me? Thanks you a lot.

Try
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(myContext, myUri)
String albumName = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM);
etc.
needs api 10 though

Streaming AAC audio with Android

As I understand it, Android will only play AAC format audio if it's encoded as MPEG-4 or 3GPP.
I'm able to play AAC audio encoded as M4A when it's local to the app, but it fails when obtaining it from a server.
The following works, as the m4a file is held locally in the res/raw directory.
MediaPlayer mp = MediaPlayer.create(this, R.raw.*file*);
mp.start();
The following doesn't work. (But does with MP3's).
Uri uri = Uri.parse("http://*example.com*/blah.m4a");
MediaPlayer mp = MediaPlayer.create(this, uri);
mp.start();
Can anyone shed any light on why it fails when the m4a audio file is not local?
Here's (some of) the error...
ERROR/PlayerDriver(542): Command PLAYER_INIT completed with an error or info UNKNOWN PVMFStatus
ERROR/MediaPlayer(769): error (200, -32)
WARN/PlayerDriver(542): PVMFInfoErrorHandlingComplete
DEBUG/MediaPlayer(769): create failed:
DEBUG/MediaPlayer(769): java.io.IOException: Prepare failed.: status=0xC8
DEBUG/MediaPlayer(769): at android.media.MediaPlayer.prepare(Native Method)
DEBUG/MediaPlayer(769): at android.media.MediaPlayer.create(MediaPlayer.java:530)
DEBUG/MediaPlayer(769): at android.media.MediaPlayer.create(MediaPlayer.java:507)
...
I'm targeting SDK 1.6.

This work-around allows you to play M4A files from the net (and AAC files in other containers such as MP4 & 3GP). It simply downloads the file and plays from the cache.
private File mediaFile;
private void playAudio(String mediaUrl) {
try {
URLConnection cn = new URL(mediaUrl).openConnection();
InputStream is = cn.getInputStream();
// create file to store audio
mediaFile = new File(this.getCacheDir(),"mediafile");
FileOutputStream fos = new FileOutputStream(mediaFile);
byte buf[] = new byte[16 * 1024];
Log.i("FileOutputStream", "Download");
// write to file until complete
do {
int numread = is.read(buf);
if (numread <= 0)
break;
fos.write(buf, 0, numread);
} while (true);
fos.flush();
fos.close();
Log.i("FileOutputStream", "Saved");
MediaPlayer mp = new MediaPlayer();
// create listener to tidy up after playback complete
MediaPlayer.OnCompletionListener listener = new MediaPlayer.OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
// free up media player
mp.release();
Log.i("MediaPlayer.OnCompletionListener", "MediaPlayer Released");
}
};
mp.setOnCompletionListener(listener);
FileInputStream fis = new FileInputStream(mediaFile);
// set mediaplayer data source to file descriptor of input stream
mp.setDataSource(fis.getFD());
mp.prepare();
Log.i("MediaPlayer", "Start Player");
mp.start();
} catch (Exception e) {
e.printStackTrace();
}
}

I tried it too but I could not find out the solution!
At the last Google I/O I saw something that helped me a lot. It is Extending from MediaPlayer and improve a lot of things! Take a look.
EXOPLAYER CAN HELP YOU A LOT
Check this part of the example:
private static final int BUFFER_SEGMENT_SIZE = 64 * 1024;
private static final int BUFFER_SEGMENT_COUNT = 256;
...
// String with the url of the radio you want to play
String url = getRadioUrl();
Uri radioUri = Uri.parse(url);
// Settings for exoPlayer
Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE);
String userAgent = Util.getUserAgent(context, "ExoPlayerDemo");
DataSource dataSource = new DefaultUriDataSource(context, null, userAgent);
ExtractorSampleSource sampleSource = new ExtractorSampleSource(
radioUri, dataSource, allocator, BUFFER_SEGMENT_SIZE * BUFFER_SEGMENT_COUNT);
audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource);
// Prepare ExoPlayer
exoPlayer.prepare(audioRenderer);
EXOPLAYER- I can play anything from streamings (video and audio)!
LET ME KNOW IF YOU NEED HELP TO IMPLEMENT IT! :)

This is a wild shot in the dark, but I have seen similar behavior with the flash player where it actually ignores the file name and only relies on the MIME type sent by the server. Any idea what headers are being sent down from example.com? You might want to try wrapping your blah.m4a in a page that can set the headers and then stream the binary data. Give these types a shot and the community would appreciate a confirmation of what works:
audio/mpeg
audio/mp4a
audio/mp4a-latm
audio/aac
audio/x-aac

I found that if you record the audio file on Android with the following properties, you are then able to play it on your server. It also plays well in the HTML Audio Element, however only on Firefox at the moment. This may change in the future.
Android (JAVA):
mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.HE_AAC);
mediaRecorder.setAudioSamplingRate(44100);
mediaRecorder.setAudioChannels(1);
mediaRecorder.setOutputFile(filePath);
HTML:
<audio id="audioMediaControl" controls src="yourfile.m4a"> Your browser does not support the audio element. </audio>

try --
1) MP.prepareAsync()
2) onPrepared() { mp.start() }