问题描述
我正在使用ViewPager：
<androidx.viewpager.widget.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipChildren="false"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
我的片段xml看起来像：
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
</data>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/frameParent">
</FrameLayout>
</layout>
当我致电layoutParams以更改边距时
val params = frameParent.layoutParams as ViewGroup.MarginLayoutParams
我遇到了例外情况：
java.lang.classCastException: androidx.viewpager.widget.ViewPager$LayoutParams cannot be cast to android.view.ViewGroup$MarginLayoutParams
完整错误：
Process: xx.xx.xx,PID: 28634
java.lang.classCastException: androidx.viewpager.widget.ViewPager$LayoutParams cannot be cast to android.view.ViewGroup$MarginLayoutParams
at xx.xx.xx.fragments.ArticleDetailsFragment.setNewMarginAnimated(ArticleDetailsFragment.kt:200)
at xx.xx.xx.fragments.ArticleDetailsFragment$onCreateView$8.onScrollChanged(ArticleDetailsFragment.kt:175)
at xx.xx.xx.view.ObservableScrollView.onScrollChanged(ObservableScrollView.kt:19)
at android.view.View.scrollTo(View.java:13587)
at androidx.core.widget.nestedScrollView.onOverScrolled(nestedScrollView.java:1056)
at androidx.core.widget.nestedScrollView.overScrollByCompat(nestedScrollView.java:1112)
at androidx.core.widget.nestedScrollView.onTouchEvent(nestedScrollView.java:905)
at android.view.View.dispatchTouchEvent(View.java:10197)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2759)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2384)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2765)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2398)
at com.android.internal.policy.DecorView.superdispatchTouchEvent(DecorView.java:460)
at com.android.internal.policy.PhoneWindow.superdispatchTouchEvent(PhoneWindow.java:1838)
at android.app.Activity.dispatchTouchEvent(Activity.java:3190)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:414)
at android.view.View.dispatchPointerEvent(View.java:10428)
at android.view.ViewRootImpl$ViewPostImeInputStage.processpointerEvent(ViewRootImpl.java:5339)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5100)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4561)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4621)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4580)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4749)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4588)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4806)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4561)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4621)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4580)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4588)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4561)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7292)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7266)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7209)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7468)
at android.view.ViewRootImpl$ColorWindowInputEventReceiver.onInputEvent(ViewRootImpl.java:9017)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7423)
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7494)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:914)
at android.view.Choreographer.doCallbacks(Choreographer.java:716)
at android.view.Choreographer.doFrame(Choreographer.java:644)
at android.view.Choreographer$FramedisplayEventReceiver.run(Choreographer.java:900)
at android.os.Handler.handleCallback(Handler.java:836)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:232)
at android.app.ActivityThread.main(ActivityThread.java:6661)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1106)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:967)
这是怎么了？
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@）