Thanks Romain guy, I'll try this later on. I'd like to change the UI depending on whether all data items in the list view are visible ...or whether some data items aren't visible. Ideally, I'd like to use something like isScrollbarNecessary ...., but since I couldn't find an api to do that, I was thinking of something like getCount() - getVisibleCount() to find out if all data items are visible or not.
On Apr 9, 10:56 pm, "Romain Guy" <[EMAIL PROTECTED]> wrote: > You can simply do listView.post(Runnable) in onCreate(). But I don't > understand why you want this information. The number of visible > children will change all the time during scrolling. > > > > > > On Wed, Apr 9, 2008 at 10:47 PM, Ram <[EMAIL PROTECTED]> wrote: > > > I moved the int countVisible = list1.getChildCount() code to onResume. > > However, I still get 0 for getChildCount. > > So it looks like onResume event is called before the first layout is > > completed. > > > Do you know which method I should override for getting > > list1.getChildCount() to work (IOW which event is called after the > > first layout is completed) > > > On Apr 9, 10:31 pm, "Romain Guy" <[EMAIL PROTECTED]> wrote: > > > Because you are calling getChildCount() before the Views are on the > > > screen. You must call it after the first layout, when the views are > > > visible on screen. > > > > On Wed, Apr 9, 2008 at 10:26 PM, Ram <[EMAIL PROTECTED]> wrote: > > > > > OK, then I'm not sure why the following test code isn't working > > > > > String[] testArray = new String[30]; > > > > ArrayAdapter<String> adapter = new ArrayAdapter<String>(m_context, > > > > R.layout.list_row, R.id.textCol1, testArray); > > > > list1.setAdapter(adapter); > > > > > int count = list1.getCount(); > > > > int countVisible = list1.getChildCount(); > > > > > Xml for the listview is > > > > <ListView android:id="@+id/list1" > > > > android:layout_width="wrap_content" > > > > android:layout_height="0dip" > > > > android:layout_weight="999" > > > > /> > > > > > The listview renders correctly. > > > > I see around 12 entries on the first page ....and I can scroll to see > > > > the other list entries > > > > The value of list1.getCount() is 30. However, list1.getChildCount() > > > > returns 0 > > > > I'm using M5-rc14 > > > > > Ram > > > > > On Apr 9, 10:16 pm, "Romain Guy" <[EMAIL PROTECTED]> wrote: > > > > > As I just said, listView.getChildCount() returns the number of views > > > > > currently displayed on screen by ListView. It has nothing to do with > > > > > the fact that the adapter is bounds by <String>. > > > > > > On Wed, Apr 9, 2008 at 10:13 PM, Ram <[EMAIL PROTECTED]> wrote: > > > > > > > I forgot to mention that the listview is bound to > > > > > > ArrayAdapter<String>. > > > > > > > ListView.GetChildCount() returns 0 (presumably, because the list > > > > > > elements aren't android views. They are strings from the array > > > > > > adapter.) > > > > > > > Do you know how I can find the number of visible strings within > > the > > > > > > listbox > > > > > > > Thanks Ram > > > > > > > On Apr 9, 9:11 pm, "Romain Guy" <[EMAIL PROTECTED]> wrote: > > > > > > > ListView.getChildCount(). > > > > > > > > On Wed, Apr 9, 2008 at 9:04 PM, Ram <[EMAIL PROTECTED]> wrote: > > > > > > > > > Hi, ListView.getCount() returns the total number of data > > items in the > > > > > > > > listview. > > > > > > > > > Does anyone know how to find out the total number of > > visible views in > > > > > > > > the listbox. > > > > > > > > > Alternately, does anyone know how to see whether the > > listview will > > > > > > > > scroll or not (i.e. if number of visible views < getCount()) > > > > > > > > -- > > > > > > > Romain Guywww.curious-creature.org > > > > > > -- > > > > > Romain Guywww.curious-creature.org-Hidequoted text - > > > > > > - Show quoted text - > > > > -- > > > Romain Guywww.curious-creature.org-Hide quoted text - > > > > - Show quoted text - > > -- > Romain Guywww.curious-creature.org- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] Announcing the new M5 SDK! http://android-developers.blogspot.com/2008/02/android-sdk-m5-rc14-now-available.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
