下面是错误：
java.lang.NullPointerException: Cannot invoke "android.content.res.BridgeTypedArray.setTheme(android.content.res.Resources$Theme)" because "ta" is null
at android.content.res.Resources_Theme_Delegate.obtainStyledAttributes(Resources_Theme_Delegate.java:74)
at android.content.res.Resources$Theme.obtainStyledAttributes(Resources.java:1631)
at android.content.Context.obtainStyledAttributes(Context.java:874)
at android.widget.TextView.setTextAppearance(TextView.java:3965)
at androidx.appcompat.widget.AppCompatTextView.setTextAppearance(AppCompatTextView.java:216)
at com.google.android.material.textview.MaterialTextView.setTextAppearance(MaterialTextView.java:106)
at android.widget.TextView.setTextAppearance(TextView.java:3954)
at androidx.core.widget.TextViewCompat.setTextAppearance(TextViewCompat.java:289)
at com.google.android.material.tabs.TabLayout$TabView.updateTab(TabLayout.java:2772)
at com.google.android.material.tabs.TabLayout$TabView.update(TabLayout.java:2801)
at com.google.android.material.tabs.TabLayout$TabView.setTab(TabLayout.java:2713)
at com.google.android.material.tabs.TabLayout.createTabView(TabLayout.java:1673)
at com.google.android.material.tabs.TabLayout.newTab(TabLayout.java:956)
at com.google.android.material.tabs.TabLayout.addTabFromItemView(TabLayout.java:824)
at com.google.android.material.tabs.TabLayout.addViewInternal(TabLayout.java:1730)
at com.google.android.material.tabs.TabLayout.addView(TabLayout.java:1720)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1131)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1101)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1130)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1101)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
at android.view.LayoutInflater.inflate(LayoutInflater.java:686)
at android.view.LayoutInflater.inflate(LayoutInflater.java:505)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:353)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:450)
at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:122)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:727)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$9(RenderTask.java:884)
at com.android.tools.idea.rendering.RenderExecutor$runAsyncActionWithTimeout$3.run(RenderExecutor.kt:195)
at com.android.tools.idea.rendering.RenderExecutor$PriorityRunnable.run(RenderExecutor.kt:293)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)材料组件依赖版本：com.google.android.material:material:1.8.0
2条答案
按热度按时间6uxekuva1#
所以显然这是一个仍然需要解决的bug，tablayout将完美地显示在设备/模拟器上，它只是不会显示在xml文件的设计视图中。所以TabLayout本身没有问题，只是在设计视图中呈现它。在这种情况下，每次进行更改时，您都必须运行应用程序来检查它，这确实是一个很大的时间浪费，但这是我们目前所能做的一切。
@编辑
实际上，我现在发现了一些问题，显然只有当您将tabItem添加到tabLayout中时才会出现这个问题。这样你就可以注解掉所有的tabItem，完成你的工作，再注解回去，然后运行应用程序。
编码愉快。
insrf1ej2#
在build.gradle中将材质的依赖关系更新为
implementation 'com.google.android.material:material'对我有效