<merge /> can be used only with a valid ViewGroup root and attachToRoot=true

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Framgent的跟布局使用<merge/>标签，出现如下异常

9-11 09:32:18.612 30995-30995/com.moreunion.zhenghao E/x_log:ViewInjectorImpl.inject(L:111): Binary XML file line #2: <merge /> can be used only with a valid ViewGroup root and attachToRoot=true
                                                                                              android.view.InflateException: Binary XML file line #2: <merge /> can be used only with a valid ViewGroup root and attachToRoot=true
                                                                                              Caused by: android.view.InflateException: <merge /> can be used only with a valid ViewGroup root and attachToRoot=true
                                                                                                  at android.view.LayoutInflater.inflate(LayoutInflater.java:488)
                                                                                                  at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
                                                                                                  at org.xutils.view.ViewInjectorImpl.inject(ViewInjectorImpl.java:107)
                                                                                                  at com.example.yilibrary.base.BaseFragment.onCreateView(BaseFragment.java:45)
                                                                                                  at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
                                                                                                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
                                                                                                  at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
                                                                                                  at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:789)
                                                                                                  at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
                                                                                                  at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
                                                                                                  at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
                                                                                                  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2063)
                                                                                                  at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
                                                                                                  at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:554)
                                                                                                  at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
                                                                                                  at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1248)
                                                                                                  at android.app.Activity.performStart(Activity.java:6699)
                                                                                                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2629)
                                                                                                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2727)
                                                                                                  at android.app.ActivityThread.-wrap12(ActivityThread.java)
                                                                                                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478)
                                                                                                  at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                                  at android.os.Looper.loop(Looper.java:154)
                                                                                                  at android.app.ActivityThread.main(ActivityThread.java:6121)
                                                                                                  at java.lang.reflect.Method.invoke(Native Method)
                                                                                                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
                                                                                                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

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