SafeDashPathEffect.java

package com.mapbox.mapboxsdk.views.safecanvas;

import android.graphics.Path;
import android.graphics.PathDashPathEffect;

public class SafeDashPathEffect extends PathDashPathEffect {
    public SafeDashPathEffect(float[] intervals, float phase, float strokeWidth) {
        super(createSafeDashedPath(intervals, phase, strokeWidth, null), floatSum(intervals), phase,
                PathDashPathEffect.Style.MORPH);
    }

    public static Path createSafeDashedPath(float[] intervals, float phase, float strokeWidth,
            Path reuse) {
        if (reuse == null) {
            reuse = new Path();
        }

        reuse.reset();
        reuse.moveTo(0, 0);
        for (int a = 0; a < intervals.length; a++) {
            if (a % 2 == 0) {
                reuse.rMoveTo(0, strokeWidth / 2);
                reuse.rLineTo(intervals[a], 0);
                reuse.rLineTo(0, -strokeWidth);
                reuse.rLineTo(-intervals[a], 0);
                reuse.rLineTo(0, strokeWidth / 2);
                reuse.rMoveTo(intervals[a], 0);
            } else {
                reuse.rMoveTo(intervals[a], 0);
            }
        }
        return reuse;
    }

    private static float floatSum(float[] array) {
        float result = 0;
        for (int a = 0; a < array.length; a++) {
            result += array[a];
        }
        return result;
    }
}