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PONull Pointer Expetion in getting value from class
 

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  1. PONull Pointer Expetion in getting value from class
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    <p>The getter and setter class is becoming NULL when i try to fetch values form it. in the code below, plz read the comments, i have added, for the explanation. i have spent too much time on it and not getting whats the problem there... I m struck !! I jst want to get the CategoryID and File and append them to the URL to show thumbnails on each row of my ListView. I have done changes many times but not working...</p> <pre><code>public class MySimpleArrayAdapter extends ArrayAdapter&lt;String&gt; { ////** Create Object For SiteList Class */ SitesList sitesList = null; //////// This is my Custom SitesList Class that contains ArrayLists public Context context; public ArrayList&lt;String&gt; siteslist; public MySimpleArrayAdapter(Context context, ArrayList&lt;String&gt; siteslist) { super(context, R.layout.row, R.id.tv_label, siteslist); this.context = context; this.siteslist = siteslist; //////// Uptill here, the Siteslist is picking all desired values and storing in it } public View getView(int position, View convertView ,ViewGroup parent) { View v = convertView; if(v == null) { LayoutInflater inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); v= inflator.inflate(R.layout.row, null); } TextView tv_name = (TextView) v.findViewById(R.id.tv_label); tv_name.setText(siteslist.get(position)); ImageView thumbnail = (ImageView) v.findViewById(R.id.iv_left); //////// But here the sitesList becomes **NULL** String categoryid = sitesList.getcategoryid().get(position).toString(); final String url = "http://dev.takkekort.no/page/designer/masks/" + categoryid +"/front/landscape/" + file ; ////////////// I want to use the above String url in the GetImage Class below to fetch each image and show it as a thumbnail in the listview. new GetImage(url).execute(thumbnail); return v; } } </code></pre> <p>And here is my SitesList Class which contains getter ans setter methods</p> <pre><code>/** Contains getter and setter method for varialbles */ public class SitesList { /** Variables */ public ArrayList&lt;String&gt; categoryid = new ArrayList&lt;String&gt;(); /** * In Setter method default it will return arraylist change that to add */ public ArrayList&lt;String&gt; getcategoryid() ////////// Category ID { return categoryid; } public void setcategoryid(String categoryid) { this.categoryid.add(categoryid); } } </code></pre> <p>Kindly update my code if possible.</p> <p>Thanks in advance !!!</p>
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    1. COare yo you sure that getcategoryid() is method of ArrayList<String>?
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    2. COyes i have added this method in my Siteslist classs public ArrayList<String> getcategoryid() ////////// Category ID { return categoryid; }
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