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    <blockquote> <p>public class Tab2 extends Activity</p> </blockquote> <p><code>Tab2</code> extends Activity, not <code>ListActivity</code>.</p> <p>To get this working, find <code>ListView</code> widget in <code>R.layout.tab2</code>:</p> <pre><code>super.onCreate(savedInstanceState); setContentView(R.layout.tab2); mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE); data = new Vector&lt;RowData&gt;(); for (int i = 0; i &lt; title.length; i++) { try { rd = new RowData(i, title[i]); } catch (ParseException e) { e.printStackTrace(); } data.add(rd); } CustomAdapter adapter = new CustomAdapter(this, R.layout.activity_list_view, R.id.title, data); ListView lv = (ListView) findViewById(R.id.your_listiew_id); lv.setAdapter(adapter); lv.setOnItemClickListener(this); </code></pre> <p>Change your class definition to:</p> <pre><code>public class Tab2 extends Activity implements AdapterView.OnItemClickListener { </code></pre> <p>And change <code>onListItemClick(ListView parent, View v, int position, long id)</code> to:</p> <pre><code>@Override public void onItemClick((AdapterView&lt;?&gt; parent, View view, int position, long id) </code></pre> <p>The problem with your code is that you never assign an <code>OnItemClickListener</code> to the <code>ListView</code>. And if you want to use <code>onListItemClick (ListView l, View v, int position, long id)</code>, then <code>Tab2</code> should extend <code>ListActivity</code>, not <code>Activity</code>. To see why: <a href="http://developer.android.com/reference/android/app/ListActivity.html#onListItemClick%28android.widget.ListView,%20android.view.View,%20int,%20long%29" rel="nofollow">Link</a>.</p>
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    1. COI added my ListView widget from tab2.xml, but i can not run that method. Your solutions are not working for me :(
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      1. USBatuhan Coşkun
    2. CO@Droid Post your updated code in the question above.
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    3. COI changed @vikram, you can see that i follow your suggestions.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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