Android Recording Library

Android Recording library offers convenient tools for audio/video recording and playback.

For audio it uses:

AudioRecord to capture and save audio signal from microphone
MediaPlayer with MediaController to play recorded audio
custom Visualizer (like bar chart) to represent audio signal on screen while recording and during playback

For video it uses:

Camera and MediaRecorder to record a video of specified resolution
MediaPlayer with MediaController to play recorded video
custom SurfaceView with adjustable size to properly display Camera preview and recorded video (in portrait and landscape modes)

Record audio: how to use

Setup VisualizerView

<com.skd.androidrecording.visualizer.VisualizerView
    android:id="@+id/visualizerView"
    android:layout_width="fill_parent"
    android:layout_height="100dp" >
</com.skd.androidrecording.visualizer.VisualizerView>

visualizerView = (VisualizerView) findViewById(R.id.visualizerView);
setupVisualizer();

...

private void setupVisualizer() {
    Paint paint = new Paint();
    paint.setStrokeWidth(5f);                     //set bar width
    paint.setAntiAlias(true);
    paint.setColor(Color.argb(200, 227, 69, 53)); //set bar color
    BarGraphRenderer barGraphRendererBottom = new BarGraphRenderer(2, paint, false);
    visualizerView.addRenderer(barGraphRendererBottom);
}

Start recording thread

private void startRecording() {
    recordingThread = new AudioRecordingThread(fileName, new AudioRecordingHandler() { //pass file name where to store the recorded audio
        @Override
        public void onFftDataCapture(final byte[] bytes) {
            runOnUiThread(new Runnable() {
                public void run() {
                    if (visualizerView != null) {
                        visualizerView.updateVisualizerFFT(bytes); //update VisualizerView with new audio portion
                    }
                }
            });
        }

        @Override
        public void onRecordSuccess() {}

        @Override
        public void onRecordingError() {}

        @Override
        public void onRecordSaveError() {}
    });
    recordingThread.start();
}

When done, stop recording

private void stopRecording() {
    if (recordingThread != null) {
        recordingThread.stopRecording();
        recordingThread = null;
    }
}

Play audio: how to use

Setup VisualizerView

Setup AudioPlaybackManager. It will attach MediaPlayer to a VisualizerView

playbackManager = new AudioPlaybackManager(this, visualizerView, playbackHandler);
playbackManager.setupPlayback(fileName); //pass file name of the recorded audio

Use onscreen MediaController to play/pause/stop/rewind audio

Record video: how to use

Setup custom SurfaceView (AdaptiveSurfaceView)

<com.skd.androidrecording.video.AdaptiveSurfaceView
    android:id="@+id/videoView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

Setup RecordingManager

videoView = (AdaptiveSurfaceView) findViewById(R.id.videoView);
recordingManager = new VideoRecordingManager(videoView, recordingHandler); //pass reference to custom SurfaceView

Choose desired video resolution and pass it to RecordingManager, it will adjust size of AdaptiveSurfaceView to properly display Camera output
```
recordingManager.setPreviewSize(videoSize);
```

To start recording use

recordingManager.startRecording(fileName, videoSize)

To stop recording use
```
recordingManager.stopRecording()
```

Play video: how to use

Setup custom SurfaceView (AdaptiveSurfaceView)

Setup VideoPlaybackManager. It will attach MediaPlayer to a VisualizerView

playbackManager = new VideoPlaybackManager(this, videoView, playbackHandler);
playbackManager.setupPlayback(fileName); //pass file name of the recorded video

Use onscreen MediaController to play/pause/stop/rewind video

====================================

For more details, please, see the demo project.