I migrated my project to androidx and used the material design "getting startetd" guideline. However it seems that I am unable to get the design correctly rendered. The MainActivity is showing the following output:
java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.AppCompat (or a descendant). at com.google.android.material.internal.ThemeEnforcement.checkTheme(ThemeEnforcement.java:240) at com.google.android.material.internal.ThemeEnforcement.checkAppCompatTheme(ThemeEnforcement.java:211) at com.google.android.material.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEnforcement.java:146) at com.google.android.material.internal.ThemeEnforcement.obtainStyledAttributes(ThemeEnforcement.java:78) at com.google.android.material.internal.ScrimInsetsFrameLayout.(ScrimInsetsFrameLayout.java:58) at com.google.android.material.navigation.NavigationView.(NavigationView.java:115) at com.google.android.material.navigation.NavigationView.(NavigationView.java:111) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:401) at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:184) at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:142) at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:229) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:421) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:432) at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:336) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate(LayoutInflater.java:837) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:394) at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:327) at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:386) at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193) at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:450) at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:590) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.Executors$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)
I can deploy it on the phone but the design preview just shows a white/blue empty screen with the errormessage from above. I am using SDK version 28, changed my styles.xml theme to 'materialcomponents' theme but nothing really helped.
Did I forget anything? I am wondering what component it is that requires AppCompat-Theme since android studio automatically converted everything to androidx and I don't have any AppCompat references.
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer"/>
</androidx.drawerlayout.widget.DrawerLayout>
