Fotoapparat fotoapparat = Fotoapparat
    .with(context)  
    .into(cameraView)
    .build();

fotoapparat.start();
    
fotoapparat
    .takePicture()
    .saveToFile(someFile);

Fotoapparat
    .with(context)  
    .into(cameraView)           // view which will draw the camera preview
    .previewScaleType(ScaleType.CENTER_CROP)  // we want the preview to fill the view  
    .photoSize(biggestSize())   // we want to have the biggest photo possible
    .lensPosition(back())       // we want back camera
    .focusMode(firstAvailable(  // (optional) use the first focus mode which is supported by device
            continuousFocus(),
            autoFocus(),        // in case if continuous focus is not available on device, auto focus will be used
            fixed()             // if even auto focus is not available - fixed focus mode will be used
    ))
    .flash(firstAvailable(      // (optional) similar to how it is done for focus mode, this time for flash
            autoRedEye(),
            autoFlash(),
            torch()
    ))
    .frameProcessor(myFrameProcessor)   // (optional) receives each frame from preview stream
    .logger(loggers(            // (optional) we want to log camera events in 2 places at once
            logcat(),           // ... in logcat
            fileLogger(this)    // ... and to file
    ))
    .build();

@Override
protected void onStart() {
    super.onStart();
    fotoapparat.start();
}

@Override
protected void onStop() {
    super.onStop();
    fotoapparat.stop();
}

PhotoResult photoResult = fotoapparat.takePicture();
 
// Asynchronously saves photo to file
photoResult.saveToFile(someFile);
 
// Asynchronously converts photo to bitmap and returns result on main thread
photoResult
    .toBitmap()
    .whenAvailable(new PendingResult.Callback<BitmapPhoto>() {
        @Override
        public void onResult(BitmapPhoto result) {
            ImageView imageView = (ImageView) findViewById(R.id.result);

            imageView.setImageBitmap(result.bitmap);
            imageView.setRotation(-result.rotationDegrees);
        }
    });
    
// Of course you can also get a photo in a blocking way. Do not do it on main thread though.
BitmapPhoto result = photoResult.toBitmap().await();
 
// Convert asynchronous events to RxJava 1.x/2.x types. See /fotoapparat-adapters/ module
photoResult
        .toBitmap()
        .adapt(SingleAdapter.<BitmapPhoto>toSingle())
        .subscribe(bitmapPhoto -> {
            
        });

fotoapparat.updateParameters(
        UpdateRequest.builder()
                .flash(
                    isTurnedOn 
                        ? torch() 
                        : off()
                )
                .build()
)