CODEWITHSUNDEEP
androidandroid-biometric-promptandroid-biometric
user2234
user2234

Reputation: 1302

Biometric Prompt crashing on Android 9 and 10 on some devices

I am using BiometricPrompt to let the user use fingerprint authentication to log into the app I have done the following in my PasswordActivity class:

     Executor executor = Executors.newSingleThreadExecutor();

    FragmentActivity activity = this;

    final BiometricPrompt biometricPrompt = new BiometricPrompt(activity, executor, new BiometricPrompt.AuthenticationCallback() {
        @Override
        public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
            super.onAuthenticationError(errorCode, errString);
            if (errorCode == BiometricPrompt.ERROR_NEGATIVE_BUTTON) {
                // user clicked negative button
            } else {
                //TODO: Called when an unrecoverable error has been encountered and the operation is complete.
            }
        }

        @Override
        public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
            super.onAuthenticationSucceeded(result);
            //TODO: Called when a biometric is recognized.
            final String decryptedText = decryptText();
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (decryptedText != null && !decryptedText.isEmpty()) {
                        editPassword.setText(decryptedText);
                        buttonNext();
                    }
                }
            });

        }

        @Override
        public void onAuthenticationFailed() {
            super.onAuthenticationFailed();
            //TODO: Called when a biometric is valid but not recognized.
        }
    });

    final BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder()
            .setTitle("My App"))
            .setSubtitle("Log on into the app"))
            .setNegativeButtonText("Cancel").toUpperCase())
            .build();

    if (sharedPreferenceManager.isFingerprintEnabled(this))
        biometricPrompt.authenticate(promptInfo);

This is the exception that I am getting. Do I have to set?

setNegativeButton (CharSequence text, 
            Executor executor, 
            DialogInterface.OnClickListener listener) as well?

I am using implementation 'androidx.biometric:biometric:1.0.0-alpha03' this version.

Caused by java.lang.IllegalArgumentException: Executor must not be null
   at android.hardware.biometrics.BiometricPrompt$Builder.setNegativeButton + 182(BiometricPrompt.java:182)
   at androidx.biometric.BiometricFragment.onCreate + 201(BiometricFragment.java:201)
   at androidx.fragment.app.Fragment.performCreate + 2414(Fragment.java:2414)
   at androidx.fragment.app.FragmentManagerImpl.moveToState + 1418(FragmentManagerImpl.java:1418)
   at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState + 1784(FragmentManagerImpl.java:1784)
   at androidx.fragment.app.FragmentManagerImpl.moveToState + 1861(FragmentManagerImpl.java:1861)
   at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange + 3269(FragmentManagerImpl.java:3269)
   at androidx.fragment.app.FragmentManagerImpl.dispatchCreate + 3223(FragmentManagerImpl.java:3223)
   at androidx.fragment.app.FragmentController.dispatchCreate + 190(FragmentController.java:190)
   at androidx.fragment.app.FragmentActivity.onCreate + 369(FragmentActivity.java:369)
   at androidx.appcompat.app.AppCompatActivity.onCreate + 85(AppCompatActivity.java:85)

Upvotes: 1

Views: 5856

Answers (3)

Martin Zeitler
Martin Zeitler

Reputation: 76779

Try to update the dependency, the currently latest version is already a release candidate:

implementation "androidx.biometric:biometric:1.0.0-rc01"

Upvotes: 0

Vansh Arora
Vansh Arora

Reputation: 421

Can you try replacing Executor executor = Executors.newSingleThreadExecutor(); with:

private Handler handler = new Handler();

private Executor executor = new Executor() {
    @Override
    public void execute(Runnable command) {
        handler.post(command);
    }
};

This is according to the code given in this developer.android.com tutorial.

Upvotes: 2

Kevin
Kevin

Reputation: 168

Caused by java.lang.IllegalArgumentException: Executor must not be null
   at android.hardware.biometrics.BiometricPrompt$Builder.setNegativeButton + 182(BiometricPrompt.java:182)

This indicates that the framework on the device you're testing is either not receiving the executor from the support library (bug in support library), or the framework itself has a bug.

Could you try on a later version of the androidx.biometric library? Beta02 was recently released, a lot of things have been fixed since alpha03.

Also, what device are you testing, if it's reproducible on Beta02 could you grab a bugreport via adb bugreport foo.zip and attach your sample app with the bug to the public issue tracker?

Upvotes: 0

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