Android-如何使用特定参数绘制可更改的行？

Hi I'm doing a practice project which could draw a line with the coordinates I put. The screen only have to textfields and one button. For example if I put "20" and "30" in those two textfields and click the "draw" button, I want the app to draw a line from (0,0) to (20,30) in ANOTHER VIEW. Hi I'm doing a practice project which could dra