[E/AndroidRuntime: FATAL EXCEPTION: main
Process: io.treehouses.remote, PID: 25830
java.lang.IllegalArgumentException: Parameter specified as non-null is null: method d.h.b.d.c, parameter view
at io.treehouses.remote.a.m.onItemSelected(Unknown Source:2)
at android.widget.AdapterView.fireOnSelected(AdapterView.java:957)
at android.widget.AdapterView.dispatchOnItemSelected(AdapterView.java:946)
at android.widget.AdapterView.selectionChanged(AdapterView.java:935)
at android.widget.AdapterView.checkSelectionChanged(AdapterView.java:1118)
at android.widget.AdapterView.handleDataChanged(AdapterView.java:1094)
at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:193)
at android.widget.Spinner.onMeasure(Spinner.java:614)
at androidx.appcompat.widget.t.onMeasure(AppCompatSpinner.java:428)
at android.view.View.measure(View.java:24710)
at androidx.constraintlayout.widget.ConstraintLayout$c.a(ConstraintLayout.java:736)
at a.e.b.j.m.b.a(BasicMeasure.java:399)
at a.e.b.j.m.b.b(BasicMeasure.java:105)
at a.e.b.j.m.b.d(BasicMeasure.java:232)
at a.e.b.j.f.W0(ConstraintWidgetContainer.java:113)
at androidx.constraintlayout.widget.ConstraintLayout.p(ConstraintLayout.java:1480)
at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1555)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24710)
at androidx.constraintlayout.widget.ConstraintLayout$c.a(ConstraintLayout.java:736)
at a.e.b.j.m.b.a(BasicMeasure.java:399)
at a.e.b.j.m.b.d(BasicMeasure.java:315)
at a.e.b.j.f.W0(ConstraintWidgetContainer.java:113)
at androidx.constraintlayout.widget.ConstraintLayout.p(ConstraintLayout.java:1480)
at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1555)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:760)
at com.google.android.material.appbar.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:99)
at com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior.onMeasureChild(AppBarLayout.java:1892)
at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:831)
at android.view.View.measure(View.java:24710)
at androidx.drawerlayout.widget.DrawerLayout.onMeasure(DrawerLayout.java:1119)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24710)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6858)
E/AndroidRuntime: at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:749)
at android.view.View.measure(View.java:24710)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3259)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2042)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2337)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1930)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7988)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1154)
at android.view.Choreographer.doCallbacks(Choreographer.java:977)
at android.view.Choreographer.doFrame(Choreographer.java:893)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1139)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7682)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)](url)