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我打算在用户离开屏幕后返回到片段时显示 androidx 生物识别提示。为此，我将身份验证逻辑放置在 Fragment 级别的 onResume 中。它在应用程序中导航时工作正常。但是，每当我导航到另一个应用程序并返回或旋转屏幕时，应用程序都会崩溃并出现异常

java.lang.RuntimeException: Unable to resume activity {com.beekay.myapp/com.beekay.myapp.MainActivity}: java.lang.IllegalStateException: FragmentManager is already executing transactions
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4205)
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4237)
        at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:52)
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
     Caused by: java.lang.IllegalStateException: FragmentManager is already executing transactions
        at androidx.fragment.app.FragmentManager.ensureExecReady(FragmentManager.java:1778)
        at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1843)
        at androidx.fragment.app.FragmentManager.executePendingTransactions(FragmentManager.java:489)
        at com.beekay.myapp.MyFragment.onResume(MyFragment.kt:147)

我的onResume代码：

override fun onResume() {
        executor = ContextCompat.getMainExecutor(requireContext())

        val callback = object : BiometricPrompt.AuthenticationCallback() {

            override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
                super.onAuthenticationError(errorCode, errString)
                findNavController().popBackStack()
            }

            override fun onAuthenticationFailed() {
                super.onAuthenticationFailed()
                findNavController().popBackStack()
            }

            override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
                super.onAuthenticationSucceeded(result)

//Continue the current work

            }
        }
        val activity = activity
        if (activity!=null) {
            val promptInfo = BiometricPrompt.PromptInfo.Builder()
                .setTitle("Investments")
                .setSubtitle("Place your finger on fingerprint scanner to view investments")
                .setNegativeButtonText("Cancel")
                .build()
            biometricPrompt = BiometricPrompt(requireActivity(), executor, callback)
            biometricPrompt.authenticate(promptInfo)
        }
super.onResume()
}
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1 回答 1

2

我通过在片段而不是活动上调用生物识别提示解决了这个问题。

变化是

biometricPrompt = BiometricPrompt(this, executor, callback)

代替

biometricPrompt = BiometricPrompt(requireActivity(), executor, callback)
于 2020-09-12T19:42:14.447 回答