AndroidRecording

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

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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

  1. 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.

 
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