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)
Try to update the dependency, the currently latest version is already a release candidate:
implementation "androidx.biometric:biometric:1.0.0-rc01"