即时音频输入和放大器;输出的Andr​​oid [英] Immediate Audio Input & Output Android

问题描述

在我的Andr​​oid应用程序，我想借此从智能手机的麦克风一些音频，并立即播放，生活，像一个麦克风，没有滞后。我目前想使用 AudioRecord 和 AudioTrack 类（从我读过），但我不是很的知道如何继续。

In my Android App, I would like to take in some audio from the mic of the smartphone and play it immediately, live, like a microphone, with no lag. I am currently thinking of using AudioRecord and AudioTrack classes (from what I have read), but I'm not quite sure how to proceed.

我检查了堆栈溢出一些其他问题，但他们并不确切地回答，我想做些什么。而且大多数是从2012年开始。

I checked out some other questions on Stack Overflow but they don't exactly answer what I would like to do. And most are from 2012.

所以，我怎么能使用这些类的输入和输出音频同步？

So how can I use these classes to input and output audio simultaneously?

同时我来看看 MediaRecorder API ，但是从我读，需要你的音频保存到文件，我不想做的事。它可以被tweeked，以满足我的要求？还是我最好只使用 AudioRecord ？

ALSO: I had a look at the MediaRecorder API, but from what I read, that requires you to save the audio to a file, which I don't want to do. Can it be tweeked to meet my requirements? Or am I better off just using AudioRecord?

感谢

编辑：

下面是我更新code以下为@Pradip Pramanick建议：

Here is my updated code below as @Pradip Pramanick suggested:

final Thread record = new Thread(new Runnable() {
        @Override
        public void run() {
            while (!Thread.interrupted()) {
                MediaRecorder microphone = new MediaRecorder();
                microphone.setAudioSource(MediaRecorder.AudioSource.MIC);
                    microphone.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                microphone.setOutputFile(filename);
                microphone.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                try {
                    microphone.prepare();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                microphone.start();
            }
        }
    });

    final Thread play = new Thread(new Runnable() {
        @Override
        public void run() {
            while (!Thread.interrupted()) {
                player = new MediaPlayer();
                try {
                    player.setDataSource(filename);
                    player.prepare();
                    player.start();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    });

我收到一个非法状态异常|启动失败：-38 。但我打电话 microphone.start 在 prepare麦克风。 ...似乎是什么问题？我搜索其他线程其中说有可能是使用麦克风等后台应用。我搜索我的设备：极限摩托播放（第3代），并没有发现。 （我甚至关掉确定谷歌语音识别，但错误不断涌现）。

I am getting an Illegal State Exception | Start failed: -38. But I am calling microphone.start after microphone.prepare... What seems to be the problem? I searched other threads which said there might be other background apps using the microphone. I searched my device: Moto X Play (3rd Gen) and found none. (I even turned off "Ok Google" voice recognition, but the error kept coming).

错误日志：

下面是日志猫显示最新的错误：

Here is the log-cat showing the most recent errors:

01-31 09:37:21.064 344-3339/? E/MediaPlayerService: offset error
01-31 09:37:21.065 1835-1922/com.synerflow.testapp E/MediaPlayer: Unable to create media player

01-31 09:37:21.065 1835-1922/com.synerflow.testapp I/Player: player.prepare() has failed
01-31 09:37:21.065 1835-1922/com.synerflow.testapp W/System.err: java.io.IOException: setDataSourceFD failed.: status=0x80000000

的IO异常，似乎是在 player.setDataSource（文件名），文件名变量是一个字符串： Environment.getExternalStorageDirectory（）getAbsolutePath （）+\\ voice.3gp

The IO Exception seems to be at player.setDataSource(filename), the filename variable is a string: Environment.getExternalStorageDirectory().getAbsolutePath() + "\voice.3gp"

推荐答案

至于我能想到它可以在一个非常简单的方式来完成。我还没有尝试过，但你试试吧。我认为它会工作：

As far as I can think it can be done in a very simple way. I haven't tried it,but you try it. I think it'll work:

创建两个线程一个用于录制另一个播放。
说线程TRecord和TPlay。

Create two threads one for recording another for playing. Say the threads are TRecord and TPlay.

在TRecord的run方法做到这一点：

In TRecord's run method do this :

public void run(){
        MediaRecorder mRecorder = null;
        mRecorder = new MediaRecorder();
        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mRecorder.setOutputFile(mFileName);
        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        try {
            mRecorder.prepare();
        } catch (IOException e) {
            //todo
        }

        mRecorder.start();
}

和它TPlay的run方法做到这一点：

And it TPlay's run method do this :

public void run() {
MediaPlayer   mPlayer = null;
mPlayer = new MediaPlayer();
        try {
            mPlayer.setDataSource(mFileName);
            mPlayer.prepare();
            mPlayer.start();
        } catch (IOException e) {
            //todo
        }
}

现在的mainactivity简单地创建两个线程。首先启动TRecord线程然后Tplay。试试吧。

Now on mainactivity simply create two threads. First start the TRecord thread then Tplay . Try it.

这里是code文件扩展名：

here is the code for file extension:

mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();
 mFileName += "/audiorecordtest.3gp";

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