this is error:
java.lang.IllegalStateException: Child drawer has absolute gravity LEFT but this DrawerLayout already has a drawer view along that edge
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1075)
at android.view.View.measure(View.java:22127)
at android.view.ViewGroup.measureChild(ViewGroup.java:6575)
at com.google.appinventor.components.runtime.ScaledFrameLayout.onMeasure(SourceFile:127)
at android.view.View.measure(View.java:22127)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6604)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:22127)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6604)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:22127)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6604)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:22127)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6604)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
at android.view.View.measure(View.java:22127)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6604)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:727)
at android.view.View.measure(View.java:22127)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2482)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1564)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1821)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1452)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6917)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1029)
at android.view.Choreographer.doCallbacks(Choreographer.java:841)
at android.view.Choreographer.doFrame(Choreographer.java:772)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1015)
at android.os.Handler.handleCallback(Handler.java:794)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:173)
at android.app.ActivityThread.main(ActivityThread.java:6653)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:821)