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POHow to get proper view in ListActivity to set OnCheckedChangeListener for CheckBox widget in Android
 

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  1. POHow to get proper view in ListActivity to set OnCheckedChangeListener for CheckBox widget in Android
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    <p>I have a ListActivity which will display three widgets for each row. One of them is a checkbox.</p> <pre><code>public class GroceryItems extends ListActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.grocery_items_list); setUpData(); } </code></pre> <p>In my setUpData() I'm using a SimpleAdapter (this is all a test case).</p> <pre><code>private void setUpData(){ // generate the maps String[] from = new String[] {"checked", "item_name","quantity"}; int[] toDisplay = new int[] {R.id.checkbox1, R.id.text1, R.id.text2}; List&lt;HashMap&lt;String, Object&gt;&gt; fillMaps = new ArrayList&lt;HashMap&lt;String, Object&gt;&gt;(); for(int i = 0; i &lt; 20; i++){ HashMap&lt;String, Object&gt; map = new HashMap&lt;String, Object&gt;(); if(i==3){ map.put("checked", false); } else{ map.put("checked", true); } map.put("item_name", items[i]); map.put("quantity","3"); fillMaps.add(map); } ListView lv= getListView(); SimpleAdapter adapter = new SimpleAdapter(this, fillMaps, R.layout.common_rowitem, from, toDisplay); lv.setAdapter(adapter); CheckBox cb = (CheckBox) lv.findViewById(R.id.checkbox1); cb.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton cb, boolean isChecked) { if(cb.isChecked()) { // action } else { // action } } }); } </code></pre> <p>On findViewById I always get a null returned and can't add the listener. I have also tried to use a view binder</p> <pre><code> adapter.setViewBinder(new SimpleAdapter.ViewBinder() { public boolean setViewValue(View view, Object data, String textRepresentation) { if (view.getId()==R.id.checkbox1){ CheckBox cb = (CheckBox) view; if (data != null){ cb.setChecked((Boolean)data); return true; } } return false; } }); </code></pre> <p>This also fails to install the handler.</p> <p>Here are the two layout views</p> <p>grocery_items_list.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; </code></pre> <p></p> <pre><code>&lt;ListView android:id="@+id/android:list" android:layout_width="wrap_content" android:layout_height="wrap_content"/&gt; </code></pre> <p> </p> <p>common_rowitem.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; </code></pre> <p> </p> <p></p> <p>Any suggestions or help is appreciated.</p>
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    1. USseth
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    1. COSorry, I don't know why this got formatted so poorly. If there was a way to delete this post I would and then try it again.
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    2. COhi did you find a solution for this?
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