MaterialComponentsViewInflater ClassNotFoundException

Overview

When using Theme.MaterialComponents theme, the following error can be found in logcat. It won’t crash the app though.

2018-05-21 19:57:17.821 4193-4193/com.example.demo I/AppCompatDelegate: Failed to instantiate custom view inflater com.google.android.material.theme.MaterialComponentsViewInflater . Falling back to default.
    java.lang.ClassNotFoundException: Invalid name: com.google.android.material.theme.MaterialComponentsViewInflater 
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:453)
        at java.lang.Class.forName(Class.java:378)
        at androidx.appcompat.app.AppCompatDelegateImpl.createView(AppCompatDelegateImpl.java:1226)
        at androidx.appcompat.app.AppCompatDelegateImpl.onCreateView(AppCompatDelegateImpl.java:1297)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:772)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at com.android.internal.policy.DecorView.onResourcesLoaded(DecorView.java:1885)
        at com.android.internal.policy.PhoneWindow.generateLayout(PhoneWindow.java:2599)
        at com.android.internal.policy.PhoneWindow.installDecor(PhoneWindow.java:2672)
        at com.android.internal.policy.PhoneWindow.getDecorView(PhoneWindow.java:2071)
        at androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:566)
        at androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:509)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:457)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
        at com.example.demo.MainActivity.onCreate(MainActivity.java:13)
        at android.app.Activity.performCreate(Activity.java:7130)
        at android.app.Activity.performCreate(Activity.java:7121)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1262)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2905)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3060)
        at android.app.ActivityThread.handleRelaunchActivityInner(ActivityThread.java:4792)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4711)
        at android.app.servertransaction.ActivityRelaunchItem.execute(ActivityRelaunchItem.java:69)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:110)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
        at android.app.ClientTransactionHandler.executeTransaction(ClientTransactionHandler.java:55)
        at android.app.ActivityThread.handleRelaunchActivityLocally(ActivityThread.java:4753)
        at android.app.Activity.recreate(Activity.java:5580)
        at com.example.demo.MainActivity.onClick(MainActivity.java:30)
        at android.view.View.performClick(View.java:6597)
        at android.view.View.performClickInternal(View.java:6574)
        at android.view.View.access$3100(View.java:778)
        at android.view.View$PerformClick.run(View.java:25881)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6649)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:826)

Reproduction steps

Use Theme.MaterialComponents for an activity and start the activity. The light theme doesn’t have the error.

This can also be reproduced using Theme.MaterialComponents.Dialog and Theme.MaterialComponents.Dialog.Light theme.

Version number

1.0.0-alpha1

Operating system and device

Android P PPP2.180412.012

[NickM-27]

I am also having this error, on debug, and I made sure to add it to proguard as well

[dsn5ft]

Yep this issue has been addressed. Thanks for reporting it!