migrate this code to work on android

procedure TForm1.CreateJpg(Data: string);
var
  JpegStream: TMemoryStream;
  JpegImage: TJPEGImage;
  Bitmap: TBitmap;
  tmpPos, tmpLen: integer;
  pp: string;
begin
  try


    tmpPos := Pos('B]>', Data);
    pp := Copy(Data, 5, tmpPos-5);
    tmpLen := StrToInt(pp);
    Data := Copy(Data, tmpPos+3, tmpLen);

    Bitmap := TBitmap.Create;
    try
      JpegImage := TJpegImage.Create;
      try
        JpegStream := TMemoryStream.Create;
        try
          TIdDecoderMIME.DecodeStream(Data, JpegStream);
          JpegStream.Position := 0;
          JpegImage.LoadFromStream(JpegStream);
        finally
          JpegStream.Free;
        end;
        with Bitmap do
        begin
          Canvas.Lock;
          try
            Width := JpegImage.Width;
            Height := JpegImage.Height;
            Canvas.StretchDraw(rect(0, 0, 200, 160), JpegImage);
          finally
            Canvas.Unlock;
          end;
        end;
      finally
        JpegImage.Free;
      end;
      img.Picture.Assign(Bitmap);
    finally
      Bitmap.Free;
    end;
  except
    on E: Exception do
      //
  end;
end;

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i have this code that create JPG image using data string . i want to migrate this code to work on andriod i cant find where JPG declared in and andriod firemonkey