IllegalArgumentException:只有TabItem实例可以添加到TabLayout

Question

我有一个fragment1和fragment2。

Fragment1是应用程序的登陆页面和Fragment2有ViewPager与TabLayout:

<ViewPager
android:id="@+id/viewPager">
<TabLayout
android:visibility="@{viewModel.isTabLayoutVisible ? View.VISIBLE : View.GONE}"
android:id="@+id/tabLayout />
</ViewPager>

在我从fragment2返回到fragment1之前，它像预期的那样工作。在50%的情况下会崩溃:

java.lang.IllegalArgumentException: Only TabItem instances can be added to TabLayout
at com.google.android.material.tabs.TabLayout.addViewInternal(TabLayout.java:1517)
at com.google.android.material.tabs.TabLayout.addView(TabLayout.java:1500)
at androidx.transition.TransitionUtils.createViewBitmap(TransitionUtils.java:138)
at androidx.transition.TransitionUtils.copyViewImage(TransitionUtils.java:64)
at androidx.transition.Visibility.onDisappear(Visibility.java:401)
at androidx.transition.Visibility.createAnimator(Visibility.java:257)
at androidx.transition.Transition.createAnimators(Transition.java:747)
at androidx.transition.TransitionSet.createAnimators(TransitionSet.java:480)
at androidx.transition.Transition.playTransition(Transition.java:1821)
at androidx.transition.TransitionManager$MultiListener.onPreDraw(TransitionManager.java:301)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:1093)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3094)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1948)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8177)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
at android.view.Choreographer.doCallbacks(Choreographer.java:796)
at android.view.Choreographer.doFrame(Choreographer.java:731)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7660)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

，如果它看起来与我的代码无关。感觉android库崩溃了

但是当我移除可见性条件时:

android:visibility="@{viewModel.isTabLayoutVisible ? View.VISIBLE : View.GONE}"

运行正常

有谁知道这里有什么问题吗?

Answer 1

我添加了一些日志记录，发现当TabLayout在addView方法中接收SlidingTabIndicator时它会崩溃。我不确定是什么原因造成的，但我解决了粉碎与变通:

我创建了TabLayout的新版本，并改变了addView方法，这样我就可以过滤所有不同的视图，这些视图是预期的:

class NewTabLayout : TabLayout {
constructor(context: Context) : super(context)
constructor(context: Context, attributeSet: AttributeSet) : super(context, attributeSet)
constructor(context: Context, attributeSet: AttributeSet, defStyleAttr: Int) :
super(context, attributeSet, defStyleAttr)
override fun addView(child: View?, width: Int, height: Int) {
if (child is TabItem) {
super.addView(child, width, height)
}
}
override fun addView(child: View?, width: Int) {
if (child is TabItem) {
super.addView(child, width, height)
}
}
override fun addView(child: View?) {
if (child is TabItem) {
super.addView(child, width, height)
}
}
}