The main function of the class is the onDraw(canvas: Canvas?) method. This variable will have a custom setter that will update its value. It will contain the coordinates of the rectangle that will be drawn on the screen. This will be responsible for storing the style information of the bounding box. This class will receive a Context parameter to conform to the View constructor. Create a new file, let’s call it BarcodeBoxView. Let’s start with the creation of the View subclass.
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