Hi Justin, Yes, you are right. I went too fast in my reply. I did indeed make the two calls and it did indeed work. I was wanting to limit the number of resources needed in this activity - where in my use of one unique ListView.
After this short discussion, I think I will try to use a single list view per tab and see what the performance hit will be. On Wednesday, 20 June 2012 18:09:56 UTC+2, MagouyaWare wrote: > > If I call tabhost.setCurrentTab(1) instead of tabhost.setCurrentTab(0), >> then the initial display is correct. >> > > I think you misunderstood me... I wanted you to call both of them... > First, set the current tab to 1 and then to 0... Does the listview display > correctly on tab 0 if you do this? My guess is that it would. This is > probably not the best way to solve the problem though, but would work be a > potential workaround if all else fails. > > To answer your question, the OnTabChangedListener code rebuilds the >> listview content. >> > > I noticed you are setting the OnTabChangedListener after setting the > current tab... What happens if you try setting the change listener first? > You may need to verify that this method gets called when you do this... if > the tab host defaults the current tab to 0 and then you set it to 0 it may > decide it doesn't need to do anything... In which case, you would need to > call the method for a tab change manually yourself first. > > To answer @Mark Murphy (a Commons Guy), when I subsequently click through >> the tabs, the single listview is correctly updated and displayed. >> It just doesn't display correctly upon initial display. >> > > Just because it seems to work doesn't mean it is actually supported. If > this is not the intended way to use a tabhost then it may just work as a > side-effect of other things, but you may see weirdness as a result of it... > If this isn't supposed to be supported then the devs likely have not tested > this scenario... > > Thanks, > Justin Anderson > MagouyaWare Developer > http://sites.google.com/site/magouyaware > > > On Wed, Jun 20, 2012 at 10:00 AM, Simon Giddings wrote: > >> Wow, I hadn't expected replies so quickly ! >> >> @MagouyaWare - To answer your question, the OnTabChangedListener code >> rebuilds the listview content. >> I have indeed stepped through this to ensure that it does this correctly >> before the first display. >> >> If I call tabhost.setCurrentTab(1) instead of tabhost.setCurrentTab(0), >> then the initial display is correct. >> >> To answer @Mark Murphy (a Commons Guy), when I subsequently click >> through the tabs, the single listview is correctly updated and displayed. >> It just doesn't display correctly upon initial display. >> >> >> On Wednesday, 20 June 2012 17:47:15 UTC+2, MagouyaWare wrote: >> >>> Also, what does your OnTabChangedListener code do? >>> >>> Thanks, >>> Justin Anderson >>> MagouyaWare Developer >>> http://sites.google.com/site/**magouyaware<http://sites.google.com/site/magouyaware> >>> >>> >>> On Wed, Jun 20, 2012 at 9:46 AM, Justin Anderson wrote: >>> >>>> Just out of curiosity, try doing this: >>>> >>>> *tabhost.setCurrentTab(1); >>>> tabhost.setCurrentTab(0); >>>> * >>>> Does your list show up at that point? >>>> >>>> Thanks, >>>> Justin Anderson >>>> MagouyaWare Developer >>>> http://sites.google.com/site/**magouyaware<http://sites.google.com/site/magouyaware> >>>> >>>> >>>> >>>> On Wed, Jun 20, 2012 at 9:41 AM, Simon Giddings wrote: >>>> >>>>> I have a TabActivity containing a series of four tabs and a listview. >>>>> Each of the tabs reference the same listview. >>>>> When the activity is initially displayed, the listview is not >>>>> displayed. >>>>> However, clicking on another tab will display it correctly and >>>>> clicking back on the first tab will also display it correctly. >>>>> The content of the listview is changed depending on the selected tab. >>>>> >>>>> Here is my XML layout : >>>>> <?xml version="1.0" encoding="utf-8"?> >>>>> <TabHost >>>>> xmlns:android="http://schemas.**android.com/apk/res/android<http://schemas.android.com/apk/res/android> >>>>> " >>>>> android:id="@android:id/**tabhost" >>>>> android:layout_width="match_**parent" >>>>> android:layout_height="match_**parent" > >>>>> >>>>> <LinearLayout >>>>> android:layout_width="fill_**parent" >>>>> android:layout_height="fill_**parent" >>>>> android:orientation="vertical" > >>>>> >>>>> <TabWidget >>>>> android:id="@android:id/tabs" >>>>> android:layout_width="fill_**parent" >>>>> android:layout_height="wrap_**content" /> >>>>> >>>>> <FrameLayout >>>>> android:id="@android:id/**tabcontent" >>>>> android:layout_width="fill_**parent" >>>>> android:layout_height="fill_**parent" > >>>>> >>>>> <ListView >>>>> android:id="@+id/**listPoisFound" >>>>> android:layout_width="match_**parent" >>>>> android:layout_height="wrap_**content" > >>>>> </ListView> >>>>> >>>>> </FrameLayout> >>>>> </LinearLayout> >>>>> >>>>> </TabHost> >>>>> >>>>> The tabs are initialised like this : >>>>> TabHost tabhost = null; >>>>> TabHost.TabSpec spec = null; >>>>> // get the tabhost >>>>> tabhost = getTabHost(); >>>>> >>>>> // create the individual tabs >>>>> spec = tabhost.newTabSpec("first"); >>>>> spec.setIndicator("First"); >>>>> spec.setContent(R.id.list); >>>>> tabhost.addTab(spec); >>>>> >>>>> spec = tabhost.newTabSpec("second"); >>>>> spec.setIndicator("Second"); >>>>> spec.setContent(R.id.list); >>>>> tabhost.addTab(spec); >>>>> >>>>> spec = tabhost.newTabSpec("third"); >>>>> spec.setIndicator("Third"); >>>>> spec.setContent(R.id.list); >>>>> tabhost.addTab(spec); >>>>> >>>>> spec = tabhost.newTabSpec("fourth"); >>>>> spec.setIndicator("Fourth"); >>>>> spec.setContent(R.id.list); >>>>> tabhost.addTab(spec); >>>>> >>>>> tabhost.setCurrentTab(0); >>>>> >>>>> tabhost.**setOnTabChangedListener(this); >>>>> >>>>> Has anyone come across this problem ? >>>>> What is the solution ? >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Android Developers" group. >>>>> To post to this group, send email to android-developers@** >>>>> googlegroups.com <[email protected]> >>>>> To unsubscribe from this group, send email to >>>>> android-developers+**[email protected]<android-developers%[email protected]> >>>>> For more options, visit this group at >>>>> http://groups.google.com/**group/android-developers?hl=en<http://groups.google.com/group/android-developers?hl=en> >>>> >>>> >>>> >>> -- >> 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] >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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