With a ViewPager placed within the AppBayLayout, I get a cast exception between FrameLayout.LayoutParams and CoordinatorLayout.LayoutParams. If I switch out ViewPager with an ImageView in the following xml, it works perfectly. Any suggestions on what may work? I'm looking to embed a slider of images that disappears when the webview is being scrolled up. I've tried putting the ViewPager within other layouts, such as LinearLayout and FrameLayout, but same problem.
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fragmentListing2"
android:fitsSystemWindows="true">
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rvToDoList"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<WebView
android:layout_width="match_parent"
android:layout_height="fill_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:id="@+id/lstWebviewDescription">
</WebView>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/lstAppBarLayout"
android:fitsSystemWindows="true"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="200dp"
android:id="@+id/lstImageAds"
app:layout_collapseMode="parallax">
</android.support.v4.view.ViewPager>
<include
android:id="@+id/lstToolbar"
layout="@layout/toolbar"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
android:foregroundGravity="top"
android:layout_width="match_parent"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
Here is the stack trace. As you can see, the cause is deep within AppBarLayout and is somewhat misleading. I first thought it was due to the NestedScrollView and kept working on that but after lots of experimentation, it turned out to be the ViewPager. Also, please ignore the intellij part of the stack trace. It's basically the same stack trace on the top when run on an android phone.
java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.support.design.widget.CoordinatorLayout$LayoutParams
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.updateOffset(AppBarLayout.java:1155)
at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onDependentViewChanged(AppBarLayout.java:1150)
at android.support.design.widget.CoordinatorLayout.offsetChildToAnchor(CoordinatorLayout.java:1341)
at android.support.design.widget.CoordinatorLayout.dispatchOnDependentViewChanged(CoordinatorLayout.java:1109)
at android.support.design.widget.CoordinatorLayout$OnPreDrawListener.onPreDraw(CoordinatorLayout.java:1581)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
at android.view.AttachInfo_Accessor.dispatchOnPreDraw(AttachInfo_Accessor.java:46)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:371)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:428)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:888)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498)
at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72)
at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610)
at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607)
at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:366)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.doRender(AndroidLayoutPreviewToolWindowManager.java:652)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.access$1700(AndroidLayoutPreviewToolWindowManager.java:80)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7$1.run(AndroidLayoutPreviewToolWindowManager.java:594)
at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:152)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:452)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:402)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:137)
at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7.run(AndroidLayoutPreviewToolWindowManager.java:589)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
