Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void android.animation.Animator$AnimatorListener.onAnimationStart(android.animation.Animator)' on a null object reference
at android.animation.AnimatorSet.start(AnimatorSet.java:651)
at com.liyu.fakeweather.ui.weather.dynamic.SunnyType.endAnimation(SunnyType.java:354)
at com.liyu.fakeweather.ui.weather.dynamic.DynamicWeatherView.onDestroy(DynamicWeatherView.java:130)
at com.liyu.fakeweather.ui.weather.WeatherFragment.onDestroy(WeatherFragment.java:205)
at android.support.v4.app.Fragment.performDestroy(Fragment.java:2434)
if (listener != null) {
animSet.addListener(listener);
}