从ArrayList Android上的路径对象存储点

Question

I have manage to draw a rectangle using the path object but I have problems adding the points into a point ArrayList. The x and y depends on the touch coordinates.

Here is my code:

public static ArrayList<ArrayList<Point>> pList = new ArrayList<ArrayList<Point>>();

public void addRectangle() {

    Path path = new Path();

    path.moveTo(x, y);
    path.lineTo(x+25, y);
    path.lineTo(x+25, y+5);
    path.lineTo(x, y+5);

    path.close();

    pList.add(?);// what do i put over here?

}

Please advice. Thank you.

Answer 1

List<Point> points = new ArrayList<Point>();

Point pointOne = new Point(x,y);
Point pointTwo = new Point(x+25,y);
Point pointThree = new Point(x+25,y+5);
Point pointFour = new Point(x,y+5);
points.add(pointOne );
points.add(pointTwo );
points.add(pointThree );
points.add(pointFour);



Path path = new Path();
path.moveTo(pointOne.x, pointOne.y);
path.lineTo(pointTwo.x, pointTwo.y);
//and so on
path.close();

//and then
pList.add(points); 

Answer 2

由于无法迭代Path ，因此最好将其用作输出性质的对象，因此，基本上，您首先应该在点上填充ArrayList ，并在使用此ArrayList构造路径甚至为此创建单独的函数时使用。