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.