how to open context menu for android listview item button

Like title, here is this problem in my activity like this:

An more button in every row of listview item .
When I click this more button then show activity context menu.

So I try to click button, but open context menu is the Adaper's context menu. My Adapter is extends fromBaseAdapter, BaseAdapter has not context menu.

My solution like example :

<ImageButton android:id="@+id/more" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="15dp" android:background="#00000000" android:src="@drawable/btn_addressbook_more" android:onClick="onMoreClick"/>

Add an event named  onMoreClick , when user click this button will do onClick event in activity.

// maybe you can register a contextMenu for one item first
public void onMoreClick(View view) {
    this.openContextMenu(view);
// when you read source code , you can find a very easy way to call openContextMenu like this : view.showContextMenu();
}

Add event impl to Activity, when click event happened open Activity's context menu. And execute flow code you will override

public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
    // TODO  you code for create context menu here
}

now you click more button, open an activity's context menu. but my item index is disappeared. You can do like me, set a View Tag to your button. here you can get Tag to get index.

v.getTag();   // after you set Tag in Adapter's get view function.

So, that is! happy new year :)