public void tirarFoto()
        {
            Intent intent = new Intent(MediaStore.ActionImageCapture);
            arquivoImagem = pegarAequivoImagem();
            intent.PutExtra(MediaStore.ExtraOutput, 
            Android.Net.Uri.FromFile(arquivoImagem));
            var activity = Forms.Context as Activity;
            activity.StartActivityForResult(intent, 0);//iniciar nova requisição
        }Ta dando erro na linha "activity.StartActivityForResult(intent, 0);" >
Unhandled Exception:
Android.OS.FileUriExposedException: file:///storage/emulated/0/Pictures/Imagens/MinhaFoto.jpg exposed beyond app through ClipData.Item.getUri()
 
            