计算不规则，正多边形为Android的面积和周长
Calculate the area and perimeter of irregular and regular polygons . You can choose from three different types of data: Cartesian coordinates, polar or survey description. You have in your disposal a panel to choose the types of data, an area with data entry, a canvas with a preview of the polygon and then display the results.
The application contains the following features:
- Panel for setting the data types
- Textarea to introduce coordinates with the preview of the polygon obtained
- A display with the results for the calculation of area and perimeter
- Buttons for saving data entry and results in txt and pdf
- A box with advanced options and the possibility to save the drawing of the polygon in png and pdf
- Buttons for sharing the results