lerist/rxandroidaudio

Maybe the most robust Android Audio encapsulation library, with part Rx support.

RxAndroidAudio

Android Audio encapsulation library, with part Rx support.

Usage

Add to gradle dependency of your module build.gradle:

repositories {
    jcenter()
}

dependencies {
    compile 'com.github.piasy:rxandroidaudio:1.0.2'
}

Declare permissions:

<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Use in code:

Record to file:

mAudioRecorder = AudioRecorder.getInstance();
mAudioFile = new File(
        Environment.getExternalStorageDirectory().getAbsolutePath() +
                File.separator + System.nanoTime() + ".file.m4a");
mAudioRecorder.prepareRecord(MediaRecorder.AudioSource.MIC,
        MediaRecorder.OutputFormat.MPEG_4, MediaRecorder.AudioEncoder.AAC,
        mAudioFile);
// ...
mAudioRecorder.stopRecord();

Play a file:

mRxAudioPlayer.play(audioFile)
        .subscribeOn(Schedulers.io())
        .subscribe(new Action1<Boolean>() {
            @Override
            public void call(Boolean aBoolean) {
                // play finished
            }
        });

Record a stream:

mOutputFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +
        File.separator + System.nanoTime() + ".stream.m4a");
mOutputFile.createNewFile();
mFileOutputStream = new FileOutputStream(mOutputFile);
mStreamAudioRecorder.start(new StreamAudioRecorder.AudioDataCallback() {
    @Override
    public void onAudioData(byte[] data, int size) {
        if (mFileOutputStream != null) {
            try {
                mFileOutputStream.write(data, 0, size);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void onError() {
        mBtnStart.post(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(getApplicationContext(), "Record fail",
                        Toast.LENGTH_SHORT).show();
                mBtnStart.setText("Start");
                mIsRecording = false;
            }
        });
    }
});

Play a stream:

Observable.just(mOutputFile).subscribeOn(Schedulers.io()).subscribe(new Action1<File>() {
    @Override
    public void call(File file) {
        try {
            mStreamAudioPlayer.init();
            FileInputStream inputStream = new FileInputStream(file);
            int read;
            while ((read = inputStream.read(mBuffer)) > 0) {
                mStreamAudioPlayer.play(mBuffer, read);
            }
            inputStream.close();
            mStreamAudioPlayer.release();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
});

See full example for more details.

Download demo apk.

Dev tips

• You need create an empty file named bintray.properties under root project dir, which is used for uploading artifact to bintray.