Develop Reference

Android MediaPlayer plays sound with lower volume the first time

This is the code I'm using to create a notification sound. However, the media player plays the sound with a lower volume when the function is called for the first time. If this function is immediately called again, it then plays with the desired volume which is the stream volume.
Uri notification = RingtoneManager.getActualDefaultRingtoneUri(context,
RingtoneManager.TYPE_NOTIFICATION);
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDataSource(context, notification);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_RING);
mMediaPlayer.setOnPreparedListener(new
MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mMediaPlayer.setVolume(1, 1);
if(!mMediaPlayer.isPlaying())
mMediaPlayer.start();
}
});
mMediaPlayer.setOnCompletionListener(new
MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mMediaPlayer.release();
}
});
mMediaPlayer.prepareAsync();
How to play the sound with the right volume at all times?

android media player on prepared listener on a null object reference

i am making a phone dialer app that play the sound when you press on button the app is working great but after a while i get a random crash because on prepared listener i do not know what is happening and this is the error
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.setOnPreparedListener(android.media.MediaPlayer$OnPreparedListener)' on a null object reference
at com.alper.pola.andoid.phonedailer.MainActivity$1.onTouch(MainActivity.java:258)
and this is how i cast the media player
if (mLastButton == one) {
MediaPlayer mediaPlayer ;
mediaPlayer = MediaPlayer.create(MainActivity.this,R.raw.one);
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mp1.start();
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mp1.release();
}
});
}
if (mLastButton == two) {
MediaPlayer mediaPlayer ;
mediaPlayer = MediaPlayer.create(MainActivity.this,R.raw.two);
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mp2.start();
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mp2.release();
}
});
}
if (mLastButton == three) {
MediaPlayer mediaPlayer ;
mediaPlayer = MediaPlayer.create(MainActivity.this,R.raw.three);
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mp3.start();
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mp3.release();
}
});
}
if (mLastButton == four) {
MediaPlayer mediaPlayer ;
mediaPlayer = MediaPlayer.create(MainActivity.this,R.raw.four);
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mp4.start();
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mp4.release();
}
});
}
the app is working fine and the same button when i click on it is working but after while the button stop working and i get this crash with every button it start with working fine but after i type a few numbers the app crash

You are using a very inefficient way while dealing with MediaPlayer. Still I'll help you a workaround with this code. Use mediaPlayer.prepare() to initiate the call. Checkout this code:
if (mLastButton == one) {
mp1 = MediaPlayer.create(MainActivity.this,R.raw.one);
mp1.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mp1.start();
});
mp1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mp1.release();
}
});
mp1.prepare();
}
Do similarly for others. There are much better way to do this but as with your code, this is shortest.

Stopping media player before playing next audio

I am having a listview in my app. Each listview item has button which will play an audio from a url received from web service. But my problem is that if I click play button from the next item then both start playing together. I am having problem in this. I want only one to play at a time. Right now I am creating new Media player object everytime button is clicked, but I also tried creating a single global object but in this case it only plays first time and not after it. What is the possible solution of it.
finalHolder.iv_sound.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
MediaPlayer mp = new MediaPlayer();
mp.setDataSource(birdsUrlList.get(position).getUrl_audio());
mp.prepare();
mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
//startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(birdsUrlList.get(position).getUrl_video())));
} catch (Exception e) {
e.printStackTrace();
}
}
});

Make the mp variable global and remove this:
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});
because if you take a look at this reference http://developer.android.com/reference/android/media/MediaPlayer.html#StateDiagram it says:
Once the MediaPlayer object is in the End state, it can no longer be
used and there is no way to bring it back to any other state.
And when you call mp.release(); the media player WILL go to that state.
Then make your onClickListener look something like this:
#Override
public void onClick(View v) {
try {
if (mp.isPlaying()) {
mp.stop();
mp.reset();
}
mp.setDataSource(birdsUrlList.get(position).getUrl_audio());
//... and so on
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
mp.reset();
}
});
The trick there is to make it back to Idle state so you can set the new data source and start playing again. It's all about the states...

setNextMediaPlayer not working

I am trying to find out how to use the android's MediaPlayer method setNextMediaPlayer which should smoothly transition from one player (song) to another. But do not know how to use the method since there is a lack of documentation.
This is what i do and it does not work:
final MediaPlayer mp1 = new MediaPlayer();
final MediaPlayer mp2 = new MediaPlayer();
try {
mp1.setDataSource("http://song1.MP3");
mp2.setDataSource("http://song2.mp3");
mp1.prepareAsync();
mp1.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp1.start();
}
});
mp1.setNextMediaPlayer(mp2);
mp1.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp2.prepareAsync();
mp2.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp2.start();
}
});
}
});
} catch (IllegalArgumentException e) {}
So the first song plays. But after it finishes the second does not start.

Got it to work.
mp1.setDataSource(song1);
mp1.prepareAsync();
mp1.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp1.start();
}
});
//mp1.start();
//mp1.seekTo(1000*100);
mp2.setDataSource(song2);
mp2.prepare();
mp1.setNextMediaPlayer(mp2);
The only problem is that the second mediaplayer cannot be called as async (i.e. mp2.prepareAsync()). I do not know why, but if you try it like that it does not start, which is a bad thing :/.

MediaPlayer setNextMediaPlayer gives a lot of problem what i do is this:
in the onCompletion() reset() the mediaplayer, setDataSource() and prepareAsync().
Something like this
mp1.setDataSource("http://song1.MP3");
mp1.prepareAsync();
mp1.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp1.start();
}
});
mp1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp1.reset();
//ADD FLAG FOR STOP
try {
mp1.setDataSource("http://song2.mp3");
} catch (IOException e) {
e.printStackTrace();
}
mp1.prepareAsync();
}
});
Then in the onCompletion you need some flag to check if the last song was played to stop, because the code as i posted will loop in the last song.

Video doesn't loop Android VideoView

I am trying to build an android app that will loop a video!
The problem is that it never loops! It plays the video only once!
During debugging i realized that the "myVideoView.setOnCompletionListener" is being executed but the video doesn't play!
I also try "mp.reset()" inside the CompletionListener.
Maybe i am missing something in a different file, such as the Manifest?
Any thoughts?
Here is my code:
final VideoView myVideoView = (VideoView)findViewById(R.id.myvideoview);
myVideoView.setVideoURI(Uri.parse(SrcPath));
myVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer arg0) {
myVideoView.requestFocus();
myVideoView.start();
}
});
myVideoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
myVideoView.setVideoURI(Uri.parse(SrcPath));
}
});

Try onPreparedListener instead of onCompletionListener:
myVideoView.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.setLooping(true);
}
});
Hope this helps.

Try this.
myVideoView = (VideoView) findViewById(R.id.videoView1);
myVideoView.setVideoPath(video_path);
myVideoView.setMediaController(new MediaController(this));
myVideoView.start();
myVideoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
myVideoView.start();
}
});
By that after completion of your video start again...

Try this.
videoView.setVideoPath(tempFileMessageUri.toString());
ctlr = new MediaController(context);
ctlr.setMediaPlayer(videoView);
videoView.setMediaController(ctlr);
videoView.requestFocus();
videoView.start();
videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
videoView.start();
}
});
videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
videoView.start();
}
});