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POAndroid How do i overwrite the filter for my ArrayAdapter?
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  1. POAndroid How do i overwrite the filter for my ArrayAdapter?
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    copied!<p>Hey guys my first post here... Im trying to write a custom filter to filter the arraylist in my arrayadapter such that my listview is filtered when i click on the button.</p> <p>For instance when i click on my button</p> <pre><code>public void onClick(View arg0) { String abc = "abc"; m_adapter.getFilter().filter(abc); } </code></pre> <p>However, when i click on my button, my app terminate unexpectedly. Here is my code for the arrayadapter and filter. Please help me.</p> <pre><code>package com.ntu.rosemobile.searchlist; public class ResultsAdapter extends ArrayAdapter&lt;SearchItem&gt; implements Filterable{ public ArrayList&lt;SearchItem&gt; subItems; public ArrayList&lt;SearchItem&gt; allItems; private LayoutInflater inflater; private PTypeFilter filter; public ResultsAdapter(Context context, int textViewResourceId, ArrayList&lt;SearchItem&gt; items) { super(context, textViewResourceId, items); this.subItems = items; this.allItems = this.subItems; inflater= LayoutInflater.from(context); } @Override public Filter getFilter() { if (filter == null){ filter = new PTypeFilter(); } return filter; } //@Override public View getView(int position, View convertView, ViewGroup parent) { View v = convertView; if (v == null) { v = inflater.inflate(R.layout.listrow, null); } SearchItem o = subItems.get(position); if (o != null) { TextView pname = (TextView) v.findViewById(R.id.productname); TextView neg = (TextView) v.findViewById(R.id.negNum); TextView pos = (TextView) v.findViewById(R.id.posNum); TextView neu = (TextView) v.findViewById(R.id.neuNum); WebImageView productPhoto = (WebImageView)v.findViewById(R.id.pPhoto); if(productPhoto!=null){ productPhoto.setImageUrl(o.getImageUrl().toString()); productPhoto.loadImage(); } if(pname!= null){ pname.setText(o.getProductName().toString()); } if (neg != null) { String a = "" + o.getNegativeReviews(); neg.setText(a); } if(neu != null){ String a = "" + o.getNeutralReviews(); neu.setText(a); } if(pos != null){ String a = "" + o.getPositiveReviews(); pos.setText(a); } } return v; } private class PTypeFilter extends Filter{ @SuppressWarnings("unchecked") @Override protected void publishResults(CharSequence prefix, FilterResults results) { // NOTE: this function is *always* called from the UI thread. subItems = (ArrayList&lt;SearchItem&gt;)results.values; notifyDataSetChanged(); } @SuppressWarnings("unchecked") protected FilterResults performFiltering(CharSequence prefix) { // NOTE: this function is *always* called from a background thread, and // not the UI thread. FilterResults results = new FilterResults(); ArrayList&lt;SearchItem&gt; i = new ArrayList&lt;SearchItem&gt;(); if (prefix!= null &amp;&amp; prefix.toString().length() &gt; 0) { for (int index = 0; index &lt; allItems.size(); index++) { SearchItem si = allItems.get(index); if(si.getPType().compareTo(prefix.toString()) == 0){ i.add(si); } } results.values = i; results.count = i.size(); } else{ synchronized (allItems){ results.values = allItems; results.count = allItems.size(); } } return results; } } } </code></pre>
 

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