How to rotate a canvas at a specific point using android.graphics.Camera.rotateX(angle)

Question

I am trying to use the Camera (android.graphics.Camera not the hardware camera) to rotate a views canvas around a specific point, in this instance the middle of the canvas.

Answer 1

This worked for me:

@Override
public void drawPixmap3D(Pixmap pixmap, int x, int y, int r) {
    Camera camera = mCamera;
    int cx = pixmap.getWidth()/2;
    camera.save();
    camera.rotateY(r);
    camera.getMatrix(mtx);
    mtx.preTranslate(-cx, 0);
    mtx.postTranslate(x, y);
    camera.restore();
    canvas.drawBitmap(((AndroidPixmap)pixmap).bitmap, mtx, this.paint);
}