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【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
...le（矩形）。我这里用了Circle和Polygon。
步骤1 添加组件
组件说明：圆形围栏按钮：用于显示圆形围栏并判断当前位置是否在圆形围栏内多边形围栏按钮：用于显示多边形围栏并判断当前位置是否在多边形围栏...
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edited Feb 21 '18 at 21:52
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