I have an array of audio files and I want to play 3 audio files one after the other, so as the gap in between them is not noticeable.
I am trying it using onCompletion listener but unable to do.
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
// TODO Auto-generated method stub
if ((image100==1)&&(image10==0)&&(image1==1))
{
mediaplayer = MediaPlayer.create(getApplicationContext(), sounds[0]);
mediaplayer.start();
mediaplayer = MediaPlayer.create(getApplicationContext(), sounds[12]);
mediaplayer.start();
mediaplayer = MediaPlayer.create(getApplicationContext(), sounds[3]);
mediaplayer.start();
}
}
You may want to try using the AudioTrack class to play your sounds. With it, you can get very close and even overlapping sounds. To use it, you create separate threads for each sound.
Here's the AudioTrack reference page and here's an easy to follow blog entry where the author implements a piano with arbitrary length and simultaneous sounds. In it, he loops very short duration sounds, but you could easily adapt that to longer, single-play sounds.
If these 3 audio files are short sounds, like game sound effects or piano tones, you can use SoundPool for playing them.
Here is a link to the sample code:
Game Sound effects in Android
Related
I am created an Android app thta needs to have a fullscreen seemless video loop playing in the background. By 'in the background' I mean that there will be buttons on top of the video.
I've read these threadw already
playback video full screen
Integrating video file in android app as app background
but I'm still confused about the following
1 Is the mediaplayer needed for video playback?
2 Will using OnCompletionListener create a 'seamless' loop or will there be a 'hiccup' as the video loops?
Use the setOnPreparedListener to tell the MediaPlayer to loop and start
videoview.setOnPreparedListener(new OnPreparedListener()
{
#Override
public void onPrepared(MediaPlayer mp) {
mp.setLooping(true);
mp.start();
}
});
This is seemless on some devices, but can cause a frame or two of stutter on others :/
I need to play an audio without gaps between lopping, the audio needs to be looped forever without gaps. Using setNextMediaPlayer only merge two audio tracks without gaps, after that it automatically stops playing the audio, it is not looping for ever. Thanks in advance.
mp1 = MediaPlayer.create(getApplicationContext(), R.raw.loop);
mp2 = MediaPlayer.create(getApplicationContext(), R.raw.loop);
protected void play() {
// TODO Auto-generated method stub
mp1.start();
mp1.setNextMediaPlayer(mp2);
// mp2.setNextMediaPlayer(mp1);
}
I tried to help a guy do that just a few days ago. See this question.
I'm not sure if he was able to achieve what he wanted, but I believe your problem is that the MediaPlayer is not in the prepared state after the 2nd track finishes. You will need to use the onCompletion listener to return it to the prepared state by calling stop() and prepareAsync(). If it doesn't need to be in the prepared state (I'm honestly not sure), it would be faster to call seekTo(0) from the onCompletion listener.
You will definitely need to uncomment the mp2.setNextMediaPlayer(mp1); line.
Such Problem: I have video file recorded with two sound channels. I tried to switch off left sound channel by this code:
MediaPlayer mp;
....
mp.setVolume(0.f, 1f);
... and on Tablet this work good (right volume channel sounds well). But then I tried it on googleTv which I connect to Samsung UE46ES6307U and this code did not work, sound swichs off.
Maybe it is bounds to Dolby Digital Plus / Dolby Pulse audio? Can I somehow programmatically discover how sound channels device has, and what volume in each chanels setuped?
Update:
On this forum http://www.googletvforum.org/forum/logitech-revue/375-audio-problems-logitech-revue.html in one of replies such message: "Logitech has not yet figured out how to pipe multichannel audio thru hdmi.you have to use the optical output. Which is ok."
"How are you constructing the MediaPlayer?"
Videoview vv;
...............
vv.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.setVolume(0.f, 1f);
}
});
Update:
public class MainActivity extends Activity {
MediaPlayer mp = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (mp != null) {
mp.reset();
mp.release();
}
mp = MediaPlayer.create(this, R.raw.test);
mp.start();
}
public void onTurnOffLeft(View v){
mp.setVolume(0.f, 1.f);
}
public void onTurnOffRight(View v){
mp.setVolume(1.f, 0.f);
}
}
Method onTurnOffLeft switchs off all sound, and onTurnOffRight method has no effect.
Update2
I tried to play .ogg audio file codded with Vorbis codec - channels turns off well. But I tried to play video files codded with mp3, ac3, pcm, aac - and problem with turning off channels is still there... I need to turn off audio channels in video, but how to solve that problem, I do not know yet.
The MediaPlayer object is backed by different libraries across the devices (not the same between a tablet and a Google TV). How are you constructing the MediaPlayer?
One thing you may want to try is calling #reset() on the MediaPlayer right after it is constructed. By default when you use a "new" operator to construct a MediaPlayer instance it is in an IDLE state (at least on Google TV). By calling reset you allow your own OnErrorListener.onError() handler to be invoked. This will let you see if there is some underlying error that is not visible otherwise.
You may also want to look at AudioManager#setStreamVolume(int, int, int) which sets the volume of ALL streams of a particular type.
Edit 1:
Since you are just grabbing the VideoView from layout (I'm guessing since that code was omitted) after you setup the listener you should call reset on the video view.
In my android application I only play a looping sound with MediaPlayer. I'm trying to loop fluid, eliminating the time between the end of the track and the beginning of the next reading.
I tried with the function setLooping but there is a time between sounds.
I tried with setOnCompletionListener function like this:
MP.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
MP.start();
}
});
However, there are still a few seconds between sounds.
Apparently it is not possible with MediaPlayer; there's an open bug asking for gapless playback that has been open since 2009.
Android: MediaPlayer gapless or seamless Video Playing also has several non-answers on the topic.
In iPhone, we can use AVQueuePlayer, AVAsset, and AVPlayerItem if we want to play a list of movies sequentially. It is very convenient over MPMediaPlayer and MPMediaPlayerController in iPhone. From, apple documentation:
AVQueuePlayer is a subclass of AVPlayer you use to play a number
of items in sequence.
So, my question is, is there anything like that in android which we can use instead of MediaPlayer and VideoView.
In Android, there is no automatic way of playing sounds in sequence (at least not a "built-in" one). If you need to start playback of the second sound when the first one finishes, you can use method
public void setOnCompletionListener (MediaPlayer.OnCompletionListener listener)
of the MediaPlayer to start the second playback when the first one is finished. Something like this:
MediaPlayer player = MediaPlayer.create(context, uriOfFirstSound);
player.setOnCompletionListener(new OnCompletionListener(
public void onCompletion(MediaPlayer mp) {
mp.setDataSource(context, uriOfNextSound);
mp.prepare();
mp.start();
}
));
player.prepare();
player.start();
Naturally, if you have more than two sounds, you can do this in a loop.