异常:
在xml文件中静态引用fragment,出现了以下异常:

Caused by: android.view.InflateException: Binary XML file line #9 in com.hsf.fragmenttest:layout/activity_main: Binary XML file line #9 in com.hsf.fragmenttest:layout/activity_main: Error inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #9 in com.hsf.fragmenttest:layout/activity_main: Error inflating class fragment
Caused by: java.lang.IllegalArgumentException: Binary XML file line #9: Must specify unique android:id, android:tag, or have a parent with an id for com.hsf.fragmenttest.LeftFragment
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解决方法:
在xml中给fragment添加id属性
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