{"id":1907,"date":"2022-08-30T15:20:26","date_gmt":"2022-08-30T15:20:26","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2013\/12\/02\/listview-with-custom-adapter-plus-custom-xml-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:20:26","modified_gmt":"2022-08-30T15:20:26","slug":"listview-with-custom-adapter-plus-custom-xml-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/listview-with-custom-adapter-plus-custom-xml-collection-of-common-programming-errors\/","title":{"rendered":"ListView with Custom Adapter plus Custom XML-Collection of common programming errors"},"content":{"rendered":"<p>I&#8217;m trying to make a listViw using a custom adapter plus custom xml file, but when I launch my app on my device, it crash.<\/p>\n<p>I just want ton display in my listView some articles:<\/p>\n<ul>\n<li>Title (TextView)<\/li>\n<li>Content (TextView)<\/li>\n<li>Date (TextView) I will change to Date after&#8230;<\/li>\n<\/ul>\n<p>Well, here is my Article class:<\/p>\n<pre><code>package com.example.articles;\n\npublic class Article {\n\n    private String titreArticle;\n    private String contenuArticle;\n    \/\/private Date dateArticle; \n    private String dateArticle;\n\n    public Article(String titre, String contenu, String date){  \n\n        titreArticle = titre;\n        contenuArticle = contenu;\n        dateArticle = date;     \n    }\n\n    public String getTitreArticle() {\n        return titreArticle;\n    }\n\n    public void setTitreArticle(String titreArticle) {\n        this.titreArticle = titreArticle;\n    }\n\n    public String getContenuArticle() {\n        return contenuArticle;\n    }\n\n    public void setContenuArticle(String contenuArticle) {\n        this.contenuArticle = contenuArticle;\n    }\n\n    public String getDateArticle() {\n        return dateArticle;\n    }\n\n    public void setDateArticle(String dateArticle) {\n        this.dateArticle = dateArticle;\n    }\n\n    public String toString(){\n\n        return this.titreArticle +\",\"+ this.contenuArticle +\",\"+ this.dateArticle;\n    }\n\n}\n<\/code><\/pre>\n<p>Here is my main activity xml file (<strong>activity_main.xml<\/strong>):<\/p>\n<pre><code>\n\n    \n    \n\n\n<\/code><\/pre>\n<p>Here is my custom XML file for my articles (<strong>article_items.xml<\/strong>):<\/p>\n<pre><code>\n\n\n     \n\n      \n\n     \n\n\n<\/code><\/pre>\n<p>Here is my custom Adapter:<\/p>\n<pre><code>package com.example.articles;\n\nimport java.util.ArrayList;\n\nimport android.app.Activity;\nimport android.content.Context;\nimport android.widget.ArrayAdapter;\nimport android.widget.TextView;\nimport android.view.LayoutInflater;\nimport android.view.View;\nimport android.view.ViewGroup;\n\npublic class ArticleAdapter extends ArrayAdapter{\n\n    private Activity activity;\n    private ArrayList article;\n    private static LayoutInflater inflater = null;\n\n    public ArticleAdapter(Activity activity, int textViewResourceId, ArrayList article){\n\n        super(activity,textViewResourceId,article);\n\n        try {\n            this.article = article;\n            this.activity = activity;\n            inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);\n        } catch (Exception e) {\n            System.out.println(e);\n        }\n    }\n\n    @Override\n    public int getCount() {\n        return article.size();\n    }\n\n    public Article getItem(Article position) {\n        return position;\n    }\n\n    @Override\n    public long getItemId(int position) {\n        return position;\n    }\n\n    public static class ViewHolder {\n        public TextView titreArticle;\n        public TextView contenuArticle;             \n        public TextView dateArticle; \n    }\n\n    @Override\n    public View getView(int position, View convertView, ViewGroup parent) {\n\n        View vi = convertView;\n        final ViewHolder holder;\n        try {\n            if (convertView == null) {\n\n                vi = inflater.inflate(R.layout.article_items, null);\n                holder = new ViewHolder();\n\n                holder.titreArticle = (TextView) vi.findViewById(R.id.titreArticle);\n                holder.contenuArticle = (TextView) vi.findViewById(R.id.contenuArticle);\n                holder.dateArticle = (TextView) vi.findViewById(R.id.dateArticle);\n\n                vi.setTag(holder);\n\n            } else {\n                holder = (ViewHolder) vi.getTag();\n            }\n\n            holder.titreArticle.setText(article.get(position).getTitreArticle());\n            holder.contenuArticle.setText(article.get(position).getContenuArticle());\n            holder.dateArticle.setText(article.get(position).getDateArticle());\n\n        } catch (Exception e) {\n            System.out.println(e);\n        }\n\n        return vi;\n    }\n\n}\n<\/code><\/pre>\n<p>Finaly, my main activity class:<\/p>\n<pre><code>package com.example.articles;\n\nimport java.util.ArrayList;\n\nimport android.os.Bundle;\nimport android.app.Activity;\nimport android.view.Menu;\n\nimport android.widget.ListView;\n\npublic class MainActivity extends Activity {\n\n    private ListView listeArticle = null;\n    private ArticleAdapter adapter = null;\n    private ArrayList articleArrayList = null;\n\n    @Override\n    protected void onCreate(Bundle savedInstanceState) {\n        super.onCreate(savedInstanceState);\n        setContentView(R.layout.activity_main);\n\n        listeArticle = (ListView) findViewById(R.id.listViewArticle);\n        articleArrayList = new ArrayList();\n\n        articleArrayList.add(new Article(\"Title1\",\"Content1\",\"11-09-2013\"));\n\n        adapter = new ArticleAdapter(MainActivity.this,0,articleArrayList);\n\n        listeArticle.setAdapter(adapter);\n\n    }\n\n    @Override\n    public boolean onCreateOptionsMenu(Menu menu) {\n        \/\/ Inflate the menu; this adds items to the action bar if it is present.\n        getMenuInflater().inflate(R.menu.main, menu);\n        return true;\n    }\n\n}\n<\/code><\/pre>\n<p>I&#8217;m a new user on Android, thanks for your help and explanations guys! \ud83d\ude09<\/p>\n<p>EDIT: Logcat<\/p>\n<pre><code>09-11 14:44:49.414: D\/ddm-heap(223): Got feature list request\n09-11 14:44:50.324: I\/System.out(223): android.view.InflateException: Binary XML file line #15: Error inflating class \n09-11 14:44:50.365: D\/AndroidRuntime(223): Shutting down VM\n09-11 14:44:50.374: W\/dalvikvm(223): threadid=3: thread exiting with uncaught exception (group=0x4001b188)\n09-11 14:44:50.374: E\/AndroidRuntime(223): Uncaught handler: thread main exiting due to uncaught exception\n09-11 14:44:50.434: E\/AndroidRuntime(223): java.lang.NullPointerException\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.AbsListView.obtainView(AbsListView.java:1276)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.ListView.measureHeightOfChildren(ListView.java:1147)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.ListView.onMeasure(ListView.java:1060)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.View.measure(View.java:7964)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:888)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:350)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.View.measure(View.java:7964)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.View.measure(View.java:7964)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.LinearLayout.measureVertical(LinearLayout.java:464)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.View.measure(View.java:7964)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.View.measure(View.java:7964)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.ViewRoot.performTraversals(ViewRoot.java:763)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.os.Handler.dispatchMessage(Handler.java:99)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.os.Looper.loop(Looper.java:123)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at android.app.ActivityThread.main(ActivityThread.java:4363)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at java.lang.reflect.Method.invokeNative(Native Method)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at java.lang.reflect.Method.invoke(Method.java:521)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)\n09-11 14:44:50.434: E\/AndroidRuntime(223):  at dalvik.system.NativeStart.main(Native Method)\n09-11 14:44:50.495: I\/dalvikvm(223): threadid=7: reacting to signal 3\n09-11 14:44:50.657: I\/dalvikvm(223): Wrote stack trace to '\/data\/anr\/traces.txt'\n09-11 14:45:11.764: I\/Process(223): Sending signal. PID: 223 SIG: 9\n<\/code><\/pre>\n<p id=\"rop\"><small>Originally posted 2013-12-02 21:17:13. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>I&#8217;m trying to make a listViw using a custom adapter plus custom xml file, but when I launch my app on my device, it crash. I just want ton display in my listView some articles: Title (TextView) Content (TextView) Date (TextView) I will change to Date after&#8230; Well, here is my Article class: package com.example.articles; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1907","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1907","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=1907"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1907\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=1907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=1907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=1907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}