Capture bitmap of ARCore ArSceneView

Question

I am trying to add a screenshot button that captures a screenshot of the ARCore camera view including the attached node.

I have tried several different approaches, all are able to capture the other content on the screen however the ARSceneView is always transparent.

Things I have tried:

ArFragment arFragment = (ArFragment) getSupportFragmentManager().findFragmentById(R.id.ux_fragment);
View view = arFragment.getARSceneView(); //Also tried arFragment.getView();

(1)

view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
view.setDrawingCacheEnabled(false);

(2)

Bitmap bitmap = getBitmapFromView(view);

public Bitmap getBitmapFromView(View view) {
        view.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
        view.buildDrawingCache();
        Bitmap returnedBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(),
                Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(returnedBitmap);
        Drawable drawable = view.getBackground();
        if (drawable != null)
            drawable.draw(canvas);
        view.draw(canvas);
        return returnedBitmap;
    }

I also know that you can get an Image from the ARFragment, but it returns a blank transparent image

Image image = arFragment.getArSceneView().getArFrame().acquireCameraImage();
//image is completely transparent and wrong size

Answer 1

You can use PixelCopy.request()

ArSceneView view = fragment.getArSceneView();
final Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
PixelCopy.request(view, bitmap, (copyResult) -> {
  if (copyResult == PixelCopy.SUCCESS) {
    // Save bitmap
  } else {
      // Error
  }
}, handler);

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