{"id":19905,"date":"2022-11-08T02:14:22","date_gmt":"2022-11-07T20:44:22","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-extend-both-fragment-and-appcompatactivity-to-a-same-class\/"},"modified":"2022-11-08T02:14:22","modified_gmt":"2022-11-07T20:44:22","slug":"solved-how-to-extend-both-fragment-and-appcompatactivity-to-a-same-class","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-extend-both-fragment-and-appcompatactivity-to-a-same-class\/","title":{"rendered":"[Solved] How to extend both fragment and AppCompatActivity to a same class?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-48739059\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"48739059\" data-parentid=\"48730189\" 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>I have changed your code. Problem was:<\/p>\n<ol>\n<li><code>findViewById()<\/code>. Activity already have <code>findViewById()<\/code> method so you can call it in Activity. But <code>Fragment<\/code> don&#8217;t have this method. In <code>Fragment<\/code> you have to find a View by <code>View.findViewById()<\/code> method, here <code>View<\/code> will be the view you are inflating in <code>onCreateView()<\/code><\/li>\n<li><code>new ViewPagerAdapter(this)<\/code>. To create a View you have to provide a Activity Context. Here you are passing <code>this<\/code> its your Fragment instance not Activity Context<\/li>\n<li>\n<p><code>ContextCompat.getDrawable()<\/code> this method also takes a Context. <code>getApplicationContext()<\/code> is not available in Fragment. You have to call <code>getActivity()<\/code> or <code>getContext()<\/code> from Fragment to get Context of the Activity.<\/p>\n<pre><code>public class aboutSLFragment extends Fragment{\n\nViewPager viewPager;\nLinearLayout sliderDotspanel;\nprivate int dotscount;\nprivate ImageView[] dots;\n\npublic aboutSLFragment() {\n  \/\/ Required empty public constructor\n}\n\n@Override\npublic View onCreateView(LayoutInflater inflater, ViewGroup container,\n                     Bundle savedInstanceState) {\n\nView rootView = inflater.inflate(R.layout.fragment_about_sl, container, false);\nviewPager = (ViewPager) rootView .findViewById(R.id.viewPager);\n\nsliderDotspanel = (LinearLayout)rootView.findViewById(R.id.SliderDots);\n\nViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getContext());\n\nviewPager.setAdapter(viewPagerAdapter);\n\ndotscount = viewPagerAdapter.getCount();\ndots = new ImageView[dotscount];\n\nfor(int i = 0; i &lt; dotscount; i++){\n\n    dots[i] = new ImageView(getContext());\n    dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.non_active_dot));\n\n    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);\n\n    params.setMargins(8, 0, 8, 0);\n\n    sliderDotspanel.addView(dots[i], params);\n\n}\n\ndots[0].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.active_dot));\n\nviewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {\n    @Override\n    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {\n\n    }\n\n    @Override\n    public void onPageSelected(int position) {\n\n        for(int i = 0; i&lt; dotscount; i++){\n            dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.non_active_dot));\n        }\n\n        dots[position].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.active_dot));\n\n    }\n\n    @Override\n    public void onPageScrollStateChanged(int state) {\n\n    }\n});\n\n \/\/ Inflate the layout for this fragment\n return rootView;\n}\n\n@Override\npublic void onViewCreated(View view, @Nullable Bundle savedInstanceState) {\n  super.onViewCreated(view, savedInstanceState);\n  \/\/you can set the title for your toolbar here for different fragments different titles\n  getActivity().setTitle(\"About Sri Lanka\");\n }\n\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>Check this code.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to extend both fragment and AppCompatActivity to a same class? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] I have changed your code. Problem was: findViewById(). Activity already have findViewById() method so you can call it in Activity. But Fragment don&#8217;t have this method. In Fragment you have to find a View by View.findViewById() method, here View will be the view you are inflating in onCreateView() new ViewPagerAdapter(this). To create a View &#8230; <a title=\"[Solved] How to extend both fragment and AppCompatActivity to a same class?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-extend-both-fragment-and-appcompatactivity-to-a-same-class\/\" aria-label=\"More on [Solved] How to extend both fragment and AppCompatActivity to a same class?\">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":[452,857,527,323,577],"class_list":["post-19905","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-android-fragments","tag-inheritance","tag-java","tag-xml"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] How to extend both fragment and AppCompatActivity to a same class? - 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-how-to-extend-both-fragment-and-appcompatactivity-to-a-same-class\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to extend both fragment and AppCompatActivity to a same class? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I have changed your code. Problem was: findViewById(). Activity already have findViewById() method so you can call it in Activity. But Fragment don&#8217;t have this method. In Fragment you have to find a View by View.findViewById() method, here View will be the view you are inflating in onCreateView() new ViewPagerAdapter(this). To create a View ... 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Problem was: findViewById(). Activity already have findViewById() method so you can call it in Activity. But Fragment don&#8217;t have this method. In Fragment you have to find a View by View.findViewById() method, here View will be the view you are inflating in onCreateView() new ViewPagerAdapter(this). To create a View ... 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