Drawing a line with 10Seattle FireMonkey.
void __fastcall TForm1::FormPaint(TObject *Sender, TCanvas *Canvas, const TRectF &ARect)
TPointF startp = TPointF(0,this->Height/2);
TPointF stopp = TPointF(this->Width,this->Height/2);
Canvas->Stroke->Color = 0xFF0000FF;
Canvas->Stroke->Kind = TBrushKind::Solid;
Canvas->Stroke->Thickness = 4;
Canvas->DrawLine(startp, stopp, 1);
I was applied the above.
In more than one finger, bend the line.
It was executed on iOS but, Android even possible execution.