{"id":34147,"date":"2023-03-02T10:39:20","date_gmt":"2023-03-02T05:09:20","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-android-java-cloud-firestore-nullpointerexception-when-converting-data-toobject-duplicate\/"},"modified":"2023-03-02T10:39:20","modified_gmt":"2023-03-02T05:09:20","slug":"solved-android-java-cloud-firestore-nullpointerexception-when-converting-data-toobject-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-android-java-cloud-firestore-nullpointerexception-when-converting-data-toobject-duplicate\/","title":{"rendered":"[Solved] Android &#8211; java Cloud Firestore : NullPointerException when converting data toObject [duplicate]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-48475025\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"48475025\" data-parentid=\"48474925\" data-score=\"-2\" 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=\"js-endorsements\" data-for-answer=\"48475025\">\n<\/div>\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>The <code>UserSettings<\/code> class has a constructor that looks like this:<\/p>\n<pre><code>public UserSettings(ArrayList&lt;User&gt; mUser, ArrayList&lt;UserAccountSettings&gt; mSettings){\n\n}\n<\/code><\/pre>\n<p>This constructor doesn&#8217;t set the <code>user<\/code> and <code>settings<\/code> variables defined in this class and it is the constructor you use to create the return value of the <code>getUserSettings<\/code> method.<\/p>\n<pre><code>return new UserSettings(mUser, mSettings ); \/\/ `mUser` and `mSettings` are `ArrayList`s\n<\/code><\/pre>\n<p>Hence the exception.<\/p>\n<p>This is the main problem, the one that generates the exception you&#8217;ve mentioned but it is not the only problem. <\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Android &#8211; java Cloud Firestore : NullPointerException when converting data toObject [duplicate] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] The UserSettings class has a constructor that looks like this: public UserSettings(ArrayList&lt;User&gt; mUser, ArrayList&lt;UserAccountSettings&gt; mSettings){ } This constructor doesn&#8217;t set the user and settings variables defined in this class and it is the constructor you use to create the return value of the getUserSettings method. return new UserSettings(mUser, mSettings ); \/\/ `mUser` and `mSettings` &#8230; <a title=\"[Solved] Android &#8211; java Cloud Firestore : NullPointerException when converting data toObject [duplicate]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-android-java-cloud-firestore-nullpointerexception-when-converting-data-toobject-duplicate\/\" aria-label=\"More on [Solved] Android &#8211; java Cloud Firestore : NullPointerException when converting data toObject [duplicate]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[452,1389,323,328],"class_list":["post-34147","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-google-cloud-firestore","tag-java","tag-nullpointerexception"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Android - java Cloud Firestore : NullPointerException when converting data toObject [duplicate] - 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-android-java-cloud-firestore-nullpointerexception-when-converting-data-toobject-duplicate\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Android - java Cloud Firestore : NullPointerException when converting data toObject [duplicate] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] The UserSettings class has a constructor that looks like this: public UserSettings(ArrayList&lt;User&gt; mUser, ArrayList&lt;UserAccountSettings&gt; mSettings){ } This constructor doesn&#8217;t set the user and settings variables defined in this class and it is the constructor you use to create the return value of the getUserSettings method. return new UserSettings(mUser, mSettings ); \/\/ `mUser` and `mSettings` ... 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mUser, ArrayList&lt;UserAccountSettings&gt; mSettings){ } This constructor doesn&#8217;t set the user and settings variables defined in this class and it is the constructor you use to create the return value of the getUserSettings method. return new UserSettings(mUser, mSettings ); \/\/ `mUser` and `mSettings` ... 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