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POTest of Point inside polygon in Android
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  1. POTest of Point inside polygon in Android
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    copied!<p>The other day I did a class in Java to calculate if a <code>point(X,Y)</code> is inside a polygon. (<code>X</code> and <code>Y</code> are <code>double</code>, because will be geo-coordinates).</p> <p>I know that Java has the class <code>Polygon</code>, but I had to use <code>Path2D</code> and <code>Point2D</code>, because <code>Polygon</code> don't allow <code>double</code>'s, just integers :(</p> <p>Once I have the polygon done in <code>Path2D</code>, I used the method <code>contains</code> (<code>Path2D</code> had it), and my problem was solved.</p> <p>But now, I want to import to Android, and the problem is here, because <code>Path2D</code> needs to import:</p> <pre><code>import java.awt.geom.Path2D; import java.awt.geom.Point2D; </code></pre> <p>and in Android don't exist awt, so I can't use.</p> <p>So, is there any class similar to <code>Path2D</code> that had <code>contains</code> method? or I have to calculate by myself?</p> <p>Here is how I did in Java using <code>Path2D</code>:</p> <pre><code>private void ConstructPolygon(Vector&lt;Point2D&gt; coodinates) { this.polygon.moveTo(coodinates.get(0).getX(), coodinates.get(0).getY()); //System.out.println(coodinates.get(0).getX() + " " + coodinates.get(0).getY()); //System.out.println("asda"); for(int i = 1; i &lt; this.num_points; i++) { //System.out.println(coodinates.get(i).getX() + " " + coodinates.get(i).getY()); this.polygon.lineTo(coodinates.get(i).getX(), coodinates.get(i).getY()); } this.polygon.closePath(); } public boolean InsideCity(Point2D punto) { return this.polygon.contains(punto); } </code></pre>
 

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