Biometric prompt crashes app: Unable to instantiate fragment androidx.biometric.FingerprintDialogFragment [181805603]

Fixed

Bug

Status Update

No update yet.

Description

ma...@bokhorst.biz

created issue #1

Mar 4, 2021 04:57AM

BUILD INFO

Samsung Galaxy S7 and other devices
Android 8 and other Android versions
Biometric library version: 1.2.0-alpha03

java.lang.RuntimeException: Unable to start activity ComponentInfo{eu.faircode.email/eu.faircode.email.ActivityMain}: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment androidx.biometric.FingerprintDialogFragment: could not find Fragment constructor
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4921)
        at android.app.ActivityThread.-wrap19(Unknown)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1702)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Method.java:-2)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment androidx.biometric.FingerprintDialogFragment: could not find Fragment constructor
        at androidx.fragment.app.Fragment.instantiate(Fragment:625)
        at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer:57)
        at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager:483)
        at androidx.fragment.app.FragmentStateManager.<init>(FragmentStateManager:85)
        at androidx.fragment.app.FragmentManager.restoreSaveState(FragmentManager:2714)
        at androidx.fragment.app.FragmentController.restoreSaveState(FragmentController:198)
        at androidx.fragment.app.FragmentActivity$2.onContextAvailable(FragmentActivity:149)
        at androidx.activity.contextaware.ContextAwareHelper.dispatchOnContextAvailable(ContextAwareHelper:99)
        at androidx.activity.ComponentActivity.onCreate(ComponentActivity:307)
        at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity:269)
        at eu.faircode.email.ActivityBase.onCreate(ActivityBase:284)
        at eu.faircode.email.ActivityMain.onCreate(ActivityMain:57)
        at android.app.Activity.performCreate(Activity.java:7183)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4921)
        at android.app.ActivityThread.-wrap19(Unknown)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1702)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Method.java:-2)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

Caused by: java.lang.NoSuchMethodException: <init> []
        at java.lang.Class.getConstructor0(Class.java:2320)
        at java.lang.Class.getConstructor(Class.java:1725)
        at androidx.fragment.app.Fragment.instantiate(Fragment:610)
        at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer:57)
        at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager:483)
        at androidx.fragment.app.FragmentStateManager.<init>(FragmentStateManager:85)
        at androidx.fragment.app.FragmentManager.restoreSaveState(FragmentManager:2714)
        at androidx.fragment.app.FragmentController.restoreSaveState(FragmentController:198)
        at androidx.fragment.app.FragmentActivity$2.onContextAvailable(FragmentActivity:149)
        at androidx.activity.contextaware.ContextAwareHelper.dispatchOnContextAvailable(ContextAwareHelper:99)
        at androidx.activity.ComponentActivity.onCreate(ComponentActivity:307)
        at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity:269)
        at eu.faircode.email.ActivityBase.onCreate(ActivityBase:284)
        at eu.faircode.email.ActivityMain.onCreate(ActivityMain:57)
        at android.app.Activity.performCreate(Activity.java:7183)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4921)
        at android.app.ActivityThread.-wrap19(Unknown)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1702)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6944)
        at java.lang.reflect.Method.invoke(Method.java:-2)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

Comments

mi...@gmail.com <mi...@gmail.com> #2Feb 8, 2022 08:49AM

I don't know what's going on with the link - I can't edit, it's supposed to be: https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:biometric/biometric/src/main/java/androidx/biometric/BiometricFragment.java;l=379-383;drc=e09aec149238b29f9f828fdf25280e29e245d2b1

ko...@gmail.com <ko...@gmail.com> #3Feb 10, 2022 08:17AM

Project: platform/frameworks/support
Branch: androidx-main
Author: Hao Dong <spdonghao@google.com>
Link: https://android-review.googlesource.com/3529473

Apply workaround of forcing strong bio to combined authenticators.

Expand for full commit details

Apply workaround of forcing strong bio to combined authenticators. 
 
Bug: 257670132 
Test: ./gradlew :biometric:biometric:test 
 
Change-Id: Ibb8532b5210407cfb530020f67d77210f58cfbc7

Files:

M biometric/biometric/src/main/java/androidx/biometric/AuthenticatorUtils.java
M biometric/biometric/src/main/java/androidx/biometric/BiometricViewModel.java

Hash: 90159701331b69ec3d0977c37ca3600e1f08e41b
Date: Thu Mar 06 01:19:14 2025

cu...@gmail.com <cu...@gmail.com> #4Feb 14, 2022 09:37AM

Project: platform/frameworks/support
Branch: androidx-main
Author: Hao Dong <spdonghao@google.com>
Link: https://android-review.googlesource.com/3537000

Fix workaround of forcing strong biometrics

Expand for full commit details

Fix workaround of forcing strong biometrics 
 
1. Use mPromptInfo.getAllowedAuthenticators() to decide whether to use 
   fake crypto object to force strong biometric, instead of the 
   consolidated authenticators. 
2. Replace isStrongBiometricAllowed() with isAtLeastStrength(). 
 
Bug: 402158770 
Bug: 257670132 
Test: ./gradlew :biometric:biometric:test 
Test: manually check b/402158770 on integration test app 
 
Change-Id: I5cfb3b659781a1570ccd6aa607df3da61a559ebf

Files:

M biometric/biometric/src/main/java/androidx/biometric/AuthenticatorUtils.java
M biometric/biometric/src/main/java/androidx/biometric/BiometricManager.java
M biometric/biometric/src/main/java/androidx/biometric/BiometricViewModel.java
M biometric/biometric/src/test/java/androidx/biometric/AuthenticatorUtilsTest.java

Hash: cb2115ab72c5c98b53d26fb33a2c0bbc153d6aea
Date: Tue Mar 11 22:35:37 2025

yt...@gmail.com <yt...@gmail.com> #5Feb 26, 2022 10:37AM

Same here. 1.2.0-alpha04

da...@gmail.com <da...@gmail.com> #6Mar 19, 2022 11:52AM

Comment has been deleted.

Message last modified on Mar 19, 2022 11:53AM

da...@gmail.com <da...@gmail.com> #7Mar 19, 2022 11:55AM

Same problem 1.2.0-alpha03

androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment androidx.biometric.FingerprintDialogFragment: could not find Fragment constructor
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4754)
at android.app.ActivityThread.-wrap18(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1599)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment androidx.biometric.FingerprintDialogFragment: could not find Fragment constructor
at androidx.fragment.app.Fragment.instantiate(Fragment.java:563)
at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:390)
at androidx.fragment.app.FragmentStateManager.<init>(FragmentStateManager.java:74)
at androidx.fragment.app.FragmentManager.restoreSaveState(FragmentManager.java:2466)
at androidx.fragment.app.FragmentController.restoreSaveState(FragmentController.java:196)
at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:287)
[...]

yt...@gmail.com <yt...@gmail.com> #8May 14, 2022 02:46PM

na...@cybercom.com <na...@cybercom.com> #9Jun 7, 2022 01:44PM

Same here. 1.2.0-alpha04

bi...@nagarro.com <bi...@nagarro.com> #10Aug 24, 2022 09:31AM

Any update on this???

bi...@nagarro.com <bi...@nagarro.com> #11Aug 24, 2022 09:39AM

This happens when theme changes. And as state is saved, upon restore it's trying to instantiate FingerprintDialogFragment, but FingerprintDialogFragment constructor is private hence app crashes

Is there any way to handle it besides letting app crash?

gs...@gmail.com <gs...@gmail.com> #12Aug 26, 2022 01:33PM

All that's needed here is to make the constructor of FingerprintDialogFragment public - it currently is private. I do not understand why this is still not fixed 17 months after it has been reported.

gs...@gmail.com <gs...@gmail.com> #13Aug 31, 2022 07:48AM

This is literally a one liner to fix: https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:biometric/biometric/src/main/java/androidx/biometric/FingerprintDialogFragment.java;l=146

That line must read:

public FingerprintDialogFragment() {}

(plus the bogus comment above removed)

ma...@bokhorst.biz <ma...@bokhorst.biz> #14Nov 3, 2022 08:32AM

It seems Google doesn't work on this library anymore :-(

A workaround is to put this in the activity's onCreate:

        Fragment bfragment = getSupportFragmentManager()
                .findFragmentByTag("androidx.biometric.BiometricFragment");
        if (bfragment != null)
            getSupportFragmentManager()
                    .beginTransaction()
                    .remove(bfragment)
                    .commitNowAllowingStateLoss();

ph...@monzo.com <ph...@monzo.com> #15Dec 5, 2022 03:38PM

Comment has been deleted.

Message last modified on Dec 5, 2022 03:38PM

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ph...@monzo.com <ph...@monzo.com> #16Dec 5, 2022 03:40PM

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Message last modified on Dec 5, 2022 03:40PM

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ph...@monzo.com <ph...@monzo.com> #17Dec 6, 2022 11:47AM

Making the constructor public will fix the crash (you can hack around this yourself by special casing androidx.biometric.FingerprintDialogFragment in a FragmentFactory), but unfortunately this code makes a bunch of lifecycle/ordering assumptions that break after state restoration. The fingerprint dialog is shown without an icon, pressing back shows the dialog again in an even more broken state, and then if you call BiometricPrompt.authenticate(...) again after cancellation you get a crash.

In the attached video I'm killing the process between backgrounding the app and returning to the task.

Stack trace:

java.lang.IllegalStateException: Fragment BiometricFragment{8fade1d} (ea16f32c-420c-47af-965c-813eba1f5a7a) not attached to a context.
    at androidx.fragment.app.Fragment.requireContext(Fragment.java:919)
    at androidx.fragment.app.Fragment.getResources(Fragment.java:983)
    at androidx.fragment.app.Fragment.getString(Fragment.java:1005)
    at androidx.biometric.BiometricFragment.authenticate(BiometricFragment.java:390)
    at androidx.biometric.BiometricPrompt.authenticateInternal(BiometricPrompt.java:1033)
    at androidx.biometric.BiometricPrompt.authenticate(BiometricPrompt.java:1013)
    at com.monzo.challenge.biometric.BiometricPromptWrapper.showForAuthentication(BiometricPromptWrapper.kt:106)
    at com.monzo.challenge.biometric.BiometricPromptWrapper.showForAuthentication$default(BiometricPromptWrapper.kt:89)
    at com.monzo.applock.biometric.BiometricAppLockActivity$onCreate$3.invoke(BiometricAppLockActivity.kt:54)
    at com.monzo.applock.biometric.BiometricAppLockActivity$onCreate$3.invoke(BiometricAppLockActivity.kt:51)
    at com.monzo.commonui.mvvm.LiveDatasKt$observeEvent$1.invoke(LiveDatas.kt:16)
    at com.monzo.commonui.mvvm.LiveDatasKt$observeEvent$1.invoke(LiveDatas.kt:15)
    at com.monzo.commonui.mvvm.LiveDatasKt.observeNotNull$lambda-0(LiveDatas.kt:25)
    at com.monzo.commonui.mvvm.LiveDatasKt.$r8$lambda$G9HM89ZUMSptDJuoT0k5RrHqKP4(LiveDatas.kt)
    at com.monzo.commonui.mvvm.LiveDatasKt$$ExternalSyntheticLambda0.onChanged(D8$$SyntheticClass)
    at androidx.lifecycle.LiveData.considerNotify(LiveData.java:133)
    at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:151)
    at androidx.lifecycle.LiveData.setValue(LiveData.java:309)
    at androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:50)
    at com.monzo.applock.biometric.BiometricAppLockViewModel.sendViewEvent(BiometricAppLockViewModel.kt:86)
    at com.monzo.applock.biometric.BiometricAppLockViewModel.showPrompt(BiometricAppLockViewModel.kt:62)
    at com.monzo.applock.biometric.BiometricAppLockViewModel.onTryAgainClicked(BiometricAppLockViewModel.kt:75)
    at com.monzo.applock.biometric.BiometricAppLockActivity.onCreate$lambda-0(BiometricAppLockActivity.kt:48)
    at com.monzo.applock.biometric.BiometricAppLockActivity.$r8$lambda$xqcfadO653FSOEqH_5rMoZrTVTo(BiometricAppLockActivity.kt)
    at com.monzo.applock.biometric.BiometricAppLockActivity$$ExternalSyntheticLambda0.onClick(D8$$SyntheticClass)
    at android.view.View.performClick(View.java:5198)
    at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1131)
    at android.view.View$PerformClick.run(View.java:21147)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

(Not sure what's going on with Comment has been deleted. above, the issue tracker seems unhappy)

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[Deleted User] <[Deleted User]> #18Jan 2, 2023 08:05AM

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Message last modified on Jan 2, 2023 08:05AM

yt...@gmail.com <yt...@gmail.com> #19Mar 26, 2023 01:24PM

Any Update on this?

ra...@gmail.com <ra...@gmail.com> #20Jul 19, 2023 09:17AM

any update on this ?

ra...@gmail.com <ra...@gmail.com> #21Aug 16, 2023 07:41AM

So google is not going to fix this because this issue is pending more than a year

al...@thr1ve.app <al...@thr1ve.app> #22Apr 22, 2024 06:54AM

any news?

ra...@gmail.com <ra...@gmail.com> #23May 1, 2024 06:41AM

Still waiting for solution more than 2 years

ap...@google.com <ap...@google.com> #24Sep 4, 2024 11:42PM

Project: platform/frameworks/support
Branch: androidx-main

commit 75f8091934d05958f344f70914151af3dd24abb8
Author: Hao Dong <spdonghao@google.com>
Date: Wed Sep 04 21:46:50 2024

Fix FingerprintDialogFragment crash when rotation

Bug: 181805603
Test: Biometric integration test app on Pixel 8a API 26
Change-Id: I51c4a339887a885fbe3d4e11bc75784aabde6957

M biometric/biometric/src/main/java/androidx/biometric/FingerprintDialogFragment.java

https://android-review.googlesource.com/3255180

sp...@google.com <sp...@google.com> Nov 12, 2024 08:15PM

Marked as fixed, reassigned to sp...@google.com.

ma...@bokhorst.biz <ma...@bokhorst.biz> #25Nov 12, 2024 08:17PM

How when what where is it fixed? And why did this take over 4 years?

sp...@google.com <sp...@google.com> #26Nov 12, 2024 08:21PM

The fix will be included in the next release. We recently revived this library and are working to address outstanding issues and improve its functionality. We understand this issue has been around for a while, and we apologize for the inconvenience it has caused.

ba...@getmidas.com <ba...@getmidas.com> #27Feb 17, 2025 01:43PM

Hi, this bug affects Android 8 and 9 devices for our app in production. The status is fixed but the release is not yet available in the latest release (1.4.0-alpha02) as far as I can see. Any updates on the timeline?

Issue 181805603

Description

Issue summary

Comments

mi...@gmail.com <mi...@gmail.com> #2Feb 8, 2022 08:49AM

ko...@gmail.com <ko...@gmail.com> #3Feb 10, 2022 08:17AM

cu...@gmail.com <cu...@gmail.com> #4Feb 14, 2022 09:37AM

yt...@gmail.com <yt...@gmail.com> #5Feb 26, 2022 10:37AM

da...@gmail.com <da...@gmail.com> #6Mar 19, 2022 11:52AM

da...@gmail.com <da...@gmail.com> #7Mar 19, 2022 11:55AM

yt...@gmail.com <yt...@gmail.com> #8May 14, 2022 02:46PM

na...@cybercom.com <na...@cybercom.com> #9Jun 7, 2022 01:44PM

bi...@nagarro.com <bi...@nagarro.com> #10Aug 24, 2022 09:31AM

bi...@nagarro.com <bi...@nagarro.com> #11Aug 24, 2022 09:39AM

gs...@gmail.com <gs...@gmail.com> #12Aug 26, 2022 01:33PM

gs...@gmail.com <gs...@gmail.com> #13Aug 31, 2022 07:48AM

ma...@bokhorst.biz <ma...@bokhorst.biz> #14Nov 3, 2022 08:32AM

ph...@monzo.com <ph...@monzo.com> #15Dec 5, 2022 03:38PM

ph...@monzo.com <ph...@monzo.com> #16Dec 5, 2022 03:40PM

ph...@monzo.com <ph...@monzo.com> #17Dec 6, 2022 11:47AM

[Deleted User] <[Deleted User]> #18Jan 2, 2023 08:05AM

yt...@gmail.com <yt...@gmail.com> #19Mar 26, 2023 01:24PM

ra...@gmail.com <ra...@gmail.com> #20Jul 19, 2023 09:17AM

ra...@gmail.com <ra...@gmail.com> #21Aug 16, 2023 07:41AM

al...@thr1ve.app <al...@thr1ve.app> #22Apr 22, 2024 06:54AM

ra...@gmail.com <ra...@gmail.com> #23May 1, 2024 06:41AM

ap...@google.com <ap...@google.com> #24Sep 4, 2024 11:42PM

sp...@google.com <sp...@google.com> Nov 12, 2024 08:15PM

ma...@bokhorst.biz <ma...@bokhorst.biz> #25Nov 12, 2024 08:17PM

sp...@google.com <sp...@google.com> #26Nov 12, 2024 08:21PM

ba...@getmidas.com <ba...@getmidas.com> #27Feb 17, 2025 01:43PM

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