2

我androidx.biometric:biometric:1.0.0-alpha04在我的项目中使用库。但是当我尝试使用 BiometricPrompt 进行身份验证时，我可以在 crashlytics 和 play-store 中看到许多崩溃。崩溃发生在下面的代码

myBiometricPrompt.authenticate(promptInfo, mcryptoObject!!)

下面是 crashlytics 的堆栈跟踪

Fatal Exception: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
   at androidx.fragment.app.FragmentManagerImpl.checkStateLoss(FragmentManagerImpl.java:2080)
   at androidx.fragment.app.FragmentManagerImpl.enqueueAction(FragmentManagerImpl.java:2106)
   at androidx.fragment.app.BackStackRecord.commitInternal(BackStackRecord.java:683)
   at androidx.fragment.app.BackStackRecord.commit(BackStackRecord.java:637)
   at androidx.fragment.app.DialogFragment.show(DialogFragment.java:144)
   at androidx.biometric.BiometricPrompt.authenticateInternal(BiometricPrompt.java:499)
   at androidx.biometric.BiometricPrompt.authenticate(BiometricPrompt.java:452)
   at com.transfast.transfast.biometric.BiometricHelper$startAuth$2.run(BiometricHelper.java:132)
   at android.os.Handler.handleCallback(Handler.java:790)
   at android.os.Handler.dispatchMessage(Handler.java:99)
   at android.os.Looper.loop(Looper.java:164)
   at android.app.ActivityThread.main(ActivityThread.java:7000)
   at java.lang.reflect.Method.invoke(Method.java)
   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:441)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)
4

1 回答 1

1

我们发现我们可以通过显式检查当前活动是否处于恢复状态来解决此问题：

FragmentActivity activity = ((FragmentActivity) activity);
Lifecycle lifecycle = activity.getLifecycle();
Lifecycle.State lifecycleState = lifecycle.getCurrentState();
if (lifecycleState != Lifecycle.State.RESUMED) {
    // don't
    return;
}

BiometricPrompt biometricPrompt = new BiometricPrompt(activity, mExecutor, callback);
biometricPrompt.authenticate(promptInfo);

它必须是RESUMED具体的，因为STARTED仍然可以允许调用发生在之后onSaveInstanceState

见https://developer.android.com/topic/libraries/architecture/lifecycle

于 2019-09-11T20:00:13.407 回答