java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams

[felipecaldas]

Hi there,

While testing the SmartAdapter on API 19, I am getting the error mentioned in the subject right after initialising the Adapter:

SmartAdapter.items(waitingList)
.map(Challenge.class, RunningMultiplayerGamesView.class)
.into(this.listWaitingForPlayer);

The exact stacktrace is:

Process: , PID: 29598
                                                                        java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
                                                                            at android.widget.ListView.measureScrapChild(ListView.java:1183)
                                                                            at android.widget.ListView.onMeasure(ListView.java:1149)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
                                                                            at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1226)
                                                                            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                            at android.widget.ScrollView.onMeasure(ScrollView.java:326)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
                                                                            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                            at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
                                                                            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
                                                                            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
                                                                            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
                                                                            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
                                                                            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
                                                                            at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
                                                                            at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
                                                                            at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
                                                                            at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
                                                                            at android.view.View.measure(View.java:16497)
                                                                            at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
                                                                            at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
                                                                            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
                                                                            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
                                                                            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
                                                                            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
                                                                            at android.view.Choreographer.doCallbacks(Choreographer.java:574)
                                                                            at android.view.Choreographer.doFrame(Choreographer.java:544)
                                                                            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
                                                                            at android.os.Handler.handleCallback(Handler.java:733)
                                                                            at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                            at android.os.Looper.loop(Looper.java:136)
                                                                            at android.app.ActivityThread.main(ActivityThread.java:5017)
                                                                            at java.lang.reflect.Method.invokeNative(Native Method)
                                                                            at java.lang.reflect.Method.invoke(Method.java:515)
                                                                            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
                                                                            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
                                                                            at dalvik.system.NativeStart.main(Native Method)

What I think is that for Api < 19 (not confirmed though, have only tested with API 22+ and it works) FrameLayout can't be cast correctly to AbsListView params. So my guess that somewhere in the AdapterCode we need to apply

setLayoutParams(new AbsListView.LayoutParams(100,100));

What do you think?
Thank you