Process: com.mcxtzhang.swipecaptcha, PID: 29418
java.lang.IllegalArgumentException: n must be positive
at java.util.Random.nextInt(Random.java:391)
at com.mcxtzhang.captchalib.SwipeCaptchaView.createCaptchaPath(SwipeCaptchaView.java:243)
at com.mcxtzhang.captchalib.SwipeCaptchaView.createCaptcha(SwipeCaptchaView.java:225)
at com.mcxtzhang.swipecaptcha.MainActivity$4.onResourceReady(MainActivity.java:78)
at com.mcxtzhang.swipecaptcha.MainActivity$4.onResourceReady(MainActivity.java:74)
