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
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