{"id":813,"date":"2022-11-02T00:19:01","date_gmt":"2022-11-01T18:49:01","guid":{"rendered":"https:\/\/jassweb.com\/new22\/solved-jetpacks-biometricprompt-androidx-biometric-biometricprompt-throws-nullpointerexception\/"},"modified":"2022-11-02T00:19:01","modified_gmt":"2022-11-01T18:49:01","slug":"solved-jetpacks-biometricprompt-androidx-biometric-biometricprompt-throws-nullpointerexception-2","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-jetpacks-biometricprompt-androidx-biometric-biometricprompt-throws-nullpointerexception-2\/","title":{"rendered":"[Solved] Jetpack\u2019s BiometricPrompt (androidx.biometric.BiometricPrompt) throws NullPointerException"},"content":{"rendered":"<h2> Introduction <\/h2>\n<p>[ad_1]<\/p>\n<p>The androidx.biometric.BiometricPrompt class in Jetpack is a powerful tool for developers to use for authentication purposes. However, it has been reported that it can throw a NullPointerException when used in certain circumstances. This article will discuss the causes of this issue and provide solutions to help developers avoid this issue in the future. We will also discuss the best practices for using the BiometricPrompt class and how to handle the NullPointerException if it does occur.<\/p>\n<h2> Solution<\/h2>\n<p><\/p>\n<p>The most likely cause of this issue is that the BiometricPrompt is not initialized correctly. To fix this, make sure that the BiometricPrompt is initialized with the correct parameters. Additionally, ensure that the BiometricPrompt is initialized with the correct context, such as the application context. Finally, make sure that the BiometricPrompt is initialized with the correct executor, such as the main thread executor. <\/p>\n<p><\/p>\n<div class=\"entry-content\" itemprop=\"text\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/p>\n<p><\/p>\n<div id=\"answer-55484362\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"55484362\" data-parentid=\"55481789\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>This was reported <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/issuetracker.google.com\/issues\/122054485\">three months ago<\/a> as a bug, and it was reported as fixed <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/issuetracker.google.com\/issues\/122054485#comment10\">two months ago<\/a>. However, they have not yet released a fresh artifact.<\/p>\n<p>There are some comments in that issue that suggest that \u201cit\u2019s a timing thing\u201d, and that adding delays can help as a workaround.<\/p>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p> <span class=\"d-none\" itemprop=\"commentCount\">8<\/span> <\/p>\n<\/div>\n<\/div>\n<p>solved Jetpack\u2019s BiometricPrompt (androidx.biometric.BiometricPrompt) throws NullPointerException <\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/div>\n<p>[ad_2]<\/p>\n<h1>Solving Jetpack&#8217;s BiometricPrompt (androidx.biometric.BiometricPrompt) NullPointerException<\/h1>\n<p>If you&#8217;re using Jetpack&#8217;s BiometricPrompt (androidx.biometric.BiometricPrompt) and you&#8217;re getting a NullPointerException, you&#8217;re not alone. This is a common issue that many Android developers have encountered. Fortunately, there are a few simple steps you can take to solve this problem.<\/p>\n<h2>Step 1: Check Your Manifest<\/h2>\n<p>The first step is to check your AndroidManifest.xml file and make sure that you have the necessary permissions set up. Specifically, you need to add the following permissions:<\/p>\n<ul>\n<li>android.permission.USE_BIOMETRIC<\/li>\n<li>android.permission.USE_FINGERPRINT<\/li>\n<\/ul>\n<p>If you don&#8217;t have these permissions set up, the BiometricPrompt will throw a NullPointerException.<\/p>\n<h2>Step 2: Check Your BiometricPrompt Instance<\/h2>\n<p>The next step is to check your BiometricPrompt instance. Make sure that you are passing in the correct parameters when you create the instance. Specifically, you need to make sure that you are passing in a valid BiometricPrompt.AuthenticationCallback instance. If you don&#8217;t, the BiometricPrompt will throw a NullPointerException.<\/p>\n<h2>Step 3: Check Your BiometricPrompt Callback<\/h2>\n<p>The last step is to check your BiometricPrompt.AuthenticationCallback instance. Make sure that you are implementing the onAuthenticationError and onAuthenticationSucceeded methods. If you don&#8217;t, the BiometricPrompt will throw a NullPointerException.<\/p>\n<p>By following these steps, you should be able to solve the NullPointerException issue with Jetpack&#8217;s BiometricPrompt (androidx.biometric.BiometricPrompt). If you&#8217;re still having issues, you can reach out to the Android developer community for help.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction [ad_1] The androidx.biometric.BiometricPrompt class in Jetpack is a powerful tool for developers to use for authentication purposes. However, it has been reported that it can throw a NullPointerException when used in certain circumstances. This article will discuss the causes of this issue and provide solutions to help developers avoid this issue in the future. &#8230; <a title=\"[Solved] Jetpack\u2019s BiometricPrompt (androidx.biometric.BiometricPrompt) throws NullPointerException\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-jetpacks-biometricprompt-androidx-biometric-biometricprompt-throws-nullpointerexception-2\/\" aria-label=\"More on [Solved] Jetpack\u2019s BiometricPrompt (androidx.biometric.BiometricPrompt) throws NullPointerException\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[452,4529,4528,4527],"class_list":["post-813","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-android-biometric-prompt","tag-android-fingerprint-api","tag-android-jetpack"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Jetpack\u2019s BiometricPrompt (androidx.biometric.BiometricPrompt) throws NullPointerException - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-jetpacks-biometricprompt-androidx-biometric-biometricprompt-throws-nullpointerexception-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Jetpack\u2019s BiometricPrompt (androidx.biometric.BiometricPrompt) throws NullPointerException - JassWeb\" \/>\n<meta property=\"og:description\" content=\"Introduction [ad_1] The androidx.biometric.BiometricPrompt class in Jetpack is a powerful tool for developers to use for authentication purposes. 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