أواجه هذه المشكلة. يحدث ذلك من حين لآخر. آمل أن تتمكن من مساعدتي!
هنا المكدس:

Fatal Exception: java.lang.IllegalStateException: Child drawer has absolute gravity RIGHT but this DrawerLayout already has a drawer view along that edge
       at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1096)
       at android.view.View.measure(View.java:17923)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
       at android.view.View.measure(View.java:17923)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.view.View.measure(View.java:17923)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at android.view.View.measure(View.java:17923)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1723)
       at android.widget.LinearLayout.measureVertical(LinearLayout.java:785)
       at android.widget.LinearLayout.onMeasure(LinearLayout.java:654)
       at android.view.View.measure(View.java:17923)
       at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5698)
       at android.widget.FrameLayout.onMeasure(FrameLayout.java:465)
       at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2743)
       at android.view.View.measure(View.java:17923)
       at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2412)
       at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1414)
       at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1638)
       at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1292)
       at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6598)
       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:800)
       at android.view.Choreographer.doCallbacks(Choreographer.java:603)
       at android.view.Choreographer.doFrame(Choreographer.java:572)
       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:786)
       at android.os.Handler.handleCallback(Handler.java:815)
       at android.os.Handler.dispatchMessage(Handler.java:104)
       at android.os.Looper.loop(Looper.java:194)
       at android.app.ActivityThread.main(ActivityThread.java:5674)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:963)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)

PD. ثانسك 4 مكتبة اور العجائب!