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);
}


2. Start recording thread

    ```java
    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();
    }
    ```

3. When done, stop recording

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

Play audio: how to use
------------------------

1. Setup VisualizerView

2. Setup AudioPlaybackManager. It will attach MediaPlayer to a VisualizerView

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

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


Record video: how to use
------------------------

1. Setup custom SurfaceView (AdaptiveSurfaceView)

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

2. Setup RecordingManager

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

3. Choose desired video resolution and pass it to RecordingManager, it will adjust size of AdaptiveSurfaceView to properly display Camera output

    ```java
    recordingManager.setPreviewSize(videoSize);
    ``` 

4. To start recording use

    ```java
    recordingManager.startRecording(fileName, videoSize)
    ``` 

5. To stop recording use

    ```java
    recordingManager.stopRecording()
    ``` 

Play video: how to use
------------------------

1. Setup custom SurfaceView (AdaptiveSurfaceView)

2. Setup VideoPlaybackManager. It will attach MediaPlayer to a VisualizerView

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

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


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

For more details, please, see the demo project.

thinkoo/AndroidRecording

Android Recording Library

Record audio: how to use