玩MediaPlayer的多首歌曲在同一时间：只有一个是真正玩 [英] Playing multiple songs with MediaPlayer at the same time: only one is really playing

问题描述

我需要在的Andr​​oid 。

我应该用在完全相同的时间玩三个音频轨道 Android.Media.MediaPlayer 。

I am supposed to play three audio tracks at the exact same time using Android.Media.MediaPlayer.

昨天我设法使其工作这样做的：

Yesterday I managed to make it work doing so :

MediaPlayer track1 = MediaPlayer.create(this, R.raw.track1);
MediaPlayer track2 = MediaPlayer.create(this, R.raw.track2);
MediaPlayer track3 = MediaPlayer.create(this, R.raw.track3);

正如你所看到的，我的三distincts实例这里 MediaPlaye 的r

As you can see, I have three distincts instances of MediaPlayer here.

由于我是问，我需要有这些的MediaPlayer 在后台线程正在播放

Because I am asked to, I need to have these MediaPlayer being played in a background thread.

下面是我开始部分 MediaPlayers ：

//let's suppose this code snippet is in a run() method inside a Thread (which is the case)
track1.start();
track2.start();
track3.start();

如果我昨天说的，这是因为第二天，它并没有像预想的那样工作。

If I say yesterday, it's because the next day, it did not work as supposed to.

事实上，开始的MediaPlayer似乎停止任何previous播放的MediaPlayer

我在调试模式下测试：显然， track2.start（）停止TRACK1的MediaPlayer的，遵循相同的模式， track3.start（）停止tack2的MediaPlayer的。

I tested in debugger mode : clearly, track2.start() stops track1's MediaPlayer and following the same pattern, track3.start() stops tack2's MediaPlayer.

因此​​，在年底，仅TRACK3正在播放，我听不到任何previous曲目，无论音量设置，而中的我可以克利里听到所有的人面前：它应该建立某种形式的氛围

So at the end, only track3 is being played, I cannot hear any of the previous tracks, whatever the volume settings are whereas I could cleary hear all of them before : it is supposed to create some sort an ambiance.

当然，改变其轨道已启动不会改变任何东西的顺序：只有最后一首​​曲目将被听到。

Of course, changing the order in which the tracks are started does not change anything : only the last track will be heard.

如果我说一听到这是因为在调试模式下，检查房子 MediaPlayer.isPlaying 正在返回的 真正 ：所有三名球员都这么说他们是在玩，但只有一个可以听到...

If I say "heard" it is because in debugger mode, checking the property MediaPlayer.isPlaying is returning true : all three players are saying they are playing but only one can be heard... !

为什么要改变呢？
为什么会工作，一旦停止以后的工作？

Why the change ? Why did it work once to stop working afterwards ?

注意：

• 的音频文件都在相同的持续时间是大约15分钟左右


• 音频文件均 .MP3 文件COM pressed到 .ACC 文件（从 320kbps的到 144kbps的）


• 我在 Xamarin工作室工作在 C＃但clarety purpouse我会坚持小的Java code片段。

• the audio files have all the same duration which is approximately about 15 minutes
• the audio files were .mp3 files compressed into .acc files (from 320kbps to 144kbps)
• I am working under Xamarin Studio in C# but for clarety purpouse I will stick to small Java code snippets.

修改1

根据该同时我的解决办法应该是工作，是吧？

According to this Play two mp3 song at the same time my solution should be working, right ?

推荐答案

好吧，我相信我发现我可以说出治标不治本。

Well, I believe I found what I could name "a temporary solution".

MediaPlayer track1 = MediaPlayer.create(this, R.raw.track1);
track1.play();
MediaPlayer track2 = MediaPlayer.create(this, R.raw.track2);
track2.play();
MediaPlayer track3 = MediaPlayer.create(this, R.raw.track3);
track3.play();

这里的问题是，创建（）方法创建时，正在播放的歌曲有明显的差距。

The problem with this is that the create() method creates a noticeable gap when the songs are being played.

因此​​，这是不是。

过了一会儿，我试过如下：

After a while, I tried the following :

MediaPlayer track1 = MediaPlayer.create(this, R.raw.track1);
track1.play();
track1.pause();
MediaPlayer track2 = MediaPlayer.create(this, R.raw.track2);
track2.play();
track2.pause();
MediaPlayer track3 = MediaPlayer.create(this, R.raw.track3);
track3.play();
track3.pause();

// resuming...
track1.play(); 
track2.play();
track3.play();

这whay，歌曲都比较同步的。我仍然能听到一个非常小的差距，但它是更好的方式。
我发现这个解决方案很奇怪和丑陋的。

That whay, the songs are more synchronous. I can still hear a very small gap but it is way better. I found this solution quite strange as well as ugly.

除非有人有另外一种想法，我会坚持与解决方案。

Unless someone has another idea, I will stick with that solution.

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