Develop Reference

Android MediaPlayer.start does not start

I have yet to find an answer to this.
I have a local file (R.raw.Bob); and I am trying to use MediaPlayer to play the file.
Sometimes it plays, sometimes it does not. I have another file which plays seemingly fine every time.
My activity flow is like this: In onCreate I do the following:
MediaPlayer mBackground = MediaPlayer.create(MainAct.this, R.raw.background);
mBackground.start(); // Works as expected.
Now in a different part of the activity I have the following:
MediaPlayer mBob= MediaPlayer.create(MainActivity.this, R.raw.Bob);
mBob.start();
And nothing occurs. I have used Log.i() and the execution goes through the relevant code but the file does not start.
Why does MediaPlayer sometimes work and sometimes does not, and is there a more reliable way of playing sound files?

Try this to start:
MediaPlayer mBob = MediaPlayer.create(MainActivity.this, R.raw.Bob);
mBob.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(final MediaPlayer mp) {
mp.start();
}
});
and this to stop:
mBob.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
}
});

Playing sounds in Android in certain order

In an Android app I am using MediaPlayer to play sound files.
This is just for personal use and will not be published.
I have several references to the sound files:
MediaPlayer dooropen = MediaPlayer.create(MainActivity.this, R.raw.dooropen);
MediaPlayer doorclose = MediaPlayer.create(MainActivity.this, R.raw.doorclose);
//...
For example the length of the dooropen sound clip is 2 seconds so after I play it I sleep for 2.5 seconds and then play the doorclose sound clip, like so
dooropen.start();
try{ Thread.sleep(2500); }catch(InterruptedException e){ }
doorclose.start();
The issue I am having is some of my sound files are not playing in the order I have them in.
There does not seem to be any reason why certain sound files do not play, because if I play them at the top of my onCreate() procedure they all play, it is only when I try and play them in a certain order.

You should implement the setOnCompletionListener() of the mediaplayer to get a callback when playback has completed and then load another audio file that needs to start playing.
See MediaPlayer Documentation about the mediaplayer state.

Yes you can use MediaPlayer along with oncompletionListener or you may try reseting the mediaplayer after one audio is completed. example code here. You may also use session id to keep track of which file was playing and which to start now.
mPlayer = new MediaPlayer();
//set other attributes here
mPlayer.setAudioSessionId(1);
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
//check which audio session was playing and set new datasource and session
mPlayer.reset();
//set other data source here and different session id
}
});
Hope it solves your problem.

If you want to play sound in order, try this:
mp1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp2.start();
}
});
mp2.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp3.start();
}
});
mp3.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp1.start();
}
});

MediaPlayer error 100 & 38 while using two MediaPlayer objects

I'm trying to build a game which plays some sounds effects on click & at the same time music in the background.
I tried implementing this with two MediaPlayer objects.
The first one, which served for the effects on click works great.
The second one however sometimes logs error 100, sometimes error 38. No sound at all.
Variables
private MediaPlayer mEffects;
private MediaPlayer mpSoundBackground;
Implementation of the sound media player:
mpSoundBackground = MediaPlayer.create(MainActivity.this, R.raw.soundbackground1small);
mpSoundBackground.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
Logger.d("prepared");
musicPrepared = true;
}
});
mpSoundBackground.setOnErrorListener(new MediaPlayer.OnErrorListener() {
#Override
public boolean onError(MediaPlayer mp, int what, int extra) {
Logger.d("error "+what);
return false;
}
});
if (musicPrepared) {
mpSoundBackground.start();
Logger.d("music is prepared");
} else {
Logger.d("music is not prepared");
}
Implementation of the effects Media Player:
stopPlaying();
mEffects= MediaPlayer.create(MainActivity.this, R.raw.soundhit);
mEffects.start();
private void stopPlaying() {
if (mEffects!= null) {
mEffects.stop();
mEffects.release();
mEffects= null;
}
}
Update
To add to the confusion: It does seem to work in emulator
(Genymotion), but does not work on my OnePlus One, running Lollipop

You need to use the setOnPreparedListener method for both players. also if you want to play a sound on clicks consider using SoundPool.
Also in the public void onPrepared(MediaPlayer mp) method, you can use mp.start there is no need for that flag, since you can not know for sure that it is prepared once you reach that prepared flag

I couldn't make the errors go away, until I reconverted my soundfile to MP3.
Now it plays both on device & simulator without any problems.
Moral of this story: if you are running into errors, try a few encodings of the same file (possibly a few file sizes too!), it might be the solution.

MediaPlayer stops working after 30 uses?

I'm trying to write a function to play a short sound (in /res/raw) in my program, called at effectively random times throughout the program. So far I have this function:
public void playSound() {
MediaPlayer mp = new MediaPlayer();
mp = MediaPlayer.create(this, R.raw.ShortBeep);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.setLooping(false);
mp.start();
}
It works fine for awhile, but after exactly 30 plays of the sound, it stops making sound.

According to the Docs
... failure to call release() may cause subsequent instances of MediaPlayer objects to fallback to software implementations or fail altogether.
When you are done with it call mp.release() so that it can release the resources. I don't know what the limit is and I'm sure it depends on many factors. Either way you should be calling this function on your MediaPlayer object, especially if it will be used more than once.

I've just solved the exact same problem, but I'm using Xamarin. I ended up changing from holding on to a MediaPlayer instance for the lifetime of the activity to creating an instance each time I want to play a sound. I also implemented the IOnPreparedListener and IOnCompletionListener.
Hopefully you can get the idea despite it being C# code
public class ScanBarcodeView :
MvxActivity,
MediaPlayer.IOnPreparedListener,
MediaPlayer.IOnCompletionListener
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.ScanBarcodeView);
((ScanBarcodeViewModel) ViewModel).BarcodeScanFailed += (sender, args) => PlaySound(Resource.Raw.fail);
((ScanBarcodeViewModel) ViewModel).DuplicateScan += (sender, args) => PlaySound(Resource.Raw.tryagain);
}
private void PlaySound(int resource)
{
var mp = new MediaPlayer();
mp.SetDataSource(ApplicationContext, Android.Net.Uri.Parse($"android.resource://com.company.appname/{resource}"));
mp.SetOnPreparedListener(this);
mp.SetOnCompletionListener(this);
mp.PrepareAsync();
}
public void OnPrepared(MediaPlayer mp)
{
mp.Start();
}
public void OnCompletion(MediaPlayer mp)
{
mp.Release();
}
}
So, each time I want a sound to be played I create a MediaPlayer instance, so the data source, tell it that my Activity is the listener to Prepared and Completion events and prepare it. Since I'm using PrepareAsync I don't block the UI thread. When the media player is prepared the Start method on the MediaPlayer is called, and when the sound has finished playing the MediaPlayer object is released.
Before I made these changes I would get to 30 sounds played and it would all stop working. Now I've gone way past 30, also multiple sounds can be played simultaneously.
Hope that helps.

Seamless video Loop with VideoView

I have the following code to take a video as a raw resource, start the video and loop it but I need the video to loop seamlessly as of now when it comes to an end of the clip and starts the clip again the transition between causes a flicker for a split second, which I really can't have for my app.
public class Example extends Activity {
VideoView vv;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
vv = (VideoView)findViewById(R.id.VideoView01);
//Video Loop
vv.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
vv.start(); //need to make transition seamless.
}
});
Uri uri = Uri.parse("android.resource://com.example/"
+ R.raw.video);
vv.setVideoURI(uri);
vv.requestFocus();
vv.start();
}
}
The clip is only 22 seconds long but was created to be seamless so it is possible to work without the delay.

Try this it will work 100%
VideoView videoView;<---write this in outside of method or else declare it as final variable.
videoView.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.setLooping(true);
}
});

In Kotlin simply use
videoView.setOnPreparedListener { it.isLooping = true }

Not sure if this helps years later, but I used
vv.start();
vv.setOnCompletionListener ( new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
vv.start();
}
});
and it has a seamless loop

The pause is for the underlying MediaPlayer to refresh its buffers. How long that will take will depend on a number of factors, many of which are outside your control (e.g., speed of CPU, speed of on-board flash storage).
One you can control is to get your video out of the resource and into the filesystem. Resources are stored in the APK, which is a ZIP file, so extracting the video this way probably takes extra time.
You may need to switch away from VideoView and use a SurfaceView with two MediaPlayers, alternating between them -- one is playing while the next is preparing, so when the playing one ends you can switch to the new player. I have not tried this, and so I do not know what the ramifications might be. However, I know that this technique is frequently used for audio playback to transition from one clip to another.

Little late, but any reason that you can't use the following?
MediaPlayer.setLooping(true);

If you are using Kotlin
videoView.setOnPreparedListener(object : MediaPlayer.OnPreparedListener {
override fun onPrepared(mp: MediaPlayer?) {
//Start Playback
videoView.start()
//Loop Video
mp!!.isLooping = true;
Log.i(TAG, "Video Started");
}
});
Using Arrow Expression short form
videoView.setOnPreparedListener { mp ->
//Start Playback
videoView.start()
//Loop Video
mp!!.isLooping = true;
Log.i(TAG, "Video Started");
};

Answer to this is to remove the audio from the video and convert that to a .ogg file which can be looped seamlessly and then use the video without audio to loop round and this works.

Here is answer friends, you must use vv.resume in setOnCompletionListener class
[https://stackoverflow.com/a/27606389/3414469][1]