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When a user’s fingerprints, facial patterns, or voice are used to authenticate their identification, this is known as biometric authentication. Almost every phone now includes biometric authentication or Face Id. Instead of inputting a password, we may simply press the fingerprint to authenticate.
For the best user experience, we recommend apps that have fingerprint authentication for Android phones and face ID for iPhones.
‘local_auth‘ package will help us to implement these features in our flutter application.Now, let’s move on to the implementation part of this package.
To Implement the lacal_auth in Flutter you have to follow the following steps:
Add permission in your manifest file
Change your MainActivity.kt as below
Here, we have completed the setup for android.Now, move to the iOS setup
Note that this plugin works with both Touch ID and Face ID. However, to use the latter, you need to also add:
to your Info.plist file. Failure to do so results in a dialog that tells the user your app has not been updated to use Face ID.
We have completed the setup for Android and iOS, let’s move on to our dart side.
Now, we will manage our application according to the result of the above-mentioned block.
canCheckBiometrics() ==> To check whether there is local authentication available on this device or not
From this step, you get the available options of authentication on your device.
Here, we have done our work.
You can check the complete code below
As a result, you will get the demo working application of authentication.
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