Interface for displaying audio data as waveform for Android.

The component supports 2 modes:

• Recording: Suitable for use when recording audio.
• Playback: Suitable for use when playing audio. Samples are displayed as a classical waveform with optional playback indicator.

Examples:

Recording Example:

activity_main.xml

<com.newventuresoftware.waveform.WaveformView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    app:mode="RECORDING"
    android:background="#000000"
    android:id="@+id/waveformView" />

MainActivity.java

mRealtimeWaveformView = (WaveformView) findViewById(R.id.waveformView);
mRecordingThread = new RecordingThread(new AudioDataReceivedListener() {
    @Override
    public void onAudioDataReceived(short[] data) {
        mRealtimeWaveformView.setSamples(data);
    }
});

Playback Example:

activity_main.xml

<com.newventuresoftware.waveform.WaveformView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    app:mode="PLAYBACK"
    app:waveformStrokeThickness="3"
    app:waveformColor="#e5dc33"
    app:waveformFillColor="#e93519"
    android:background="#000000"
    android:id="@+id/playbackWaveformView" />

MainActivity.java

final WaveformView mPlaybackView = (WaveformView) findViewById(R.id.playbackWaveformView);
mPlaybackThread = new PlaybackThread(samples, new PlaybackListener() {
    @Override
    public void onProgress(int progress) {
        mPlaybackView.setMarkerPosition(progress);
    }
    @Override
    public void onCompletion() {
        mPlaybackView.setMarkerPosition(mPlaybackView.getAudioLength());
    }
});
mPlaybackView.setChannels(1);
mPlaybackView.setSampleRate(44100);
mPlaybackView.setSamples(samples);

For more information on recording and playback of raw audio in Android check out my [blog post] (http://www.newventuresoftware.com/blog/record-play-and-visualize-raw-audio-data-in-android/).

License

MIT