java.lang.NullPointerException: Attempt to write to field 'int android.support.v4.app.Fragment.mNext

报错~~

错误描述

java.lang.NullPointerException: Attempt to write to field ‘int android.support.v4.app.Fragment.mNextAnim’ on a null object reference

错误名称

空指针异常

错误原因

1fragment没有赋值
2在fragment为null的时候show或hide或remove了。