Android Question Tabhost AddTabWithIcon ??

ilan · Oct 8, 2015

hi

i am trying to use the tabhost view in my app and i am creating 3 pages in activity create

but i dont know why the tabs are added but without an icon.

this is my code:

B4X:

Dim p1ic1,p1ic2,p2ic1,p2ic2,p3ic1,p3ic2 As Bitmap p1ic1 = LoadBitmap(File.DirAssets,"p1ic1.png") p1ic2 = LoadBitmap(File.DirAssets,"p1ic2.png") p2ic1 = LoadBitmap(File.DirAssets,"p2ic1.png") p2ic2 = LoadBitmap(File.DirAssets,"p2ic2.png") p3ic1 = LoadBitmap(File.DirAssets,"p3ic1.png") p3ic2 = LoadBitmap(File.DirAssets,"p3ic2.png") TabHost1.AddTabWithIcon("זמנים ",p1ic1,p1ic2,"page1") TabHost1.AddTabWithIcon("תפילות ",p2ic1,p2ic2,"page2") TabHost1.AddTabWithIcon("הגדרות ",p3ic1,p3ic2,"page3")

am i doing something wrong?

Edit: found a thread where @Erel allready said that:

Starting from Android 4 the icon will only appear if there is no text.

another question, because i am adding a new tab and not edit an existing tab should i put that code only if FirstTime True??

Erel · Oct 9, 2015

You should never create UI items only when FirstTime is true.

ilan · Oct 9, 2015

Erel said:
You should never create UI items only when FirstTime is true.

thanx erel, so the creating of tabpages should be in FIRSTTIME = TRUE??

because in the example here they are not... why?

https://www.b4x.com/android/forum/threads/tabhost-tutorial.6721/#content

B4X:

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("main")
    Dim bmp1, bmp2 As Bitmap
    bmp1 = LoadBitmap(File.DirAssets, "ic.png")
    bmp2 = LoadBitmap(File.DirAssets, "ic_selected.png")
  
    TabHost1.AddTabWithIcon ("Name", bmp1, bmp2, "page1") 'load the layout file of each page
    TabHost1.AddTab("Color", "page2")
    TabHost1.AddTab("Animal", "page3")
End Sub

DonManfred · Oct 9, 2015

ilan said:
thanx erel, so the creating of tabpages should be in FIRSTTIME = TRUE??

Based on Erels answer you should do it always when activity_create is called. NOT just when Firsttime = true

ilan · Oct 9, 2015

DonManfred said:

Based on Erels answer you should do it always when activity_create is called. NOT just when Firsttime = true

Click to expand...

the word "only" is confusing..

like this i would agree with u and also would not keep asking:

You should never create UI items when FirstTime is true.

Click to expand...

EDIT: ok after reading it 5 times it makes more sense...

Erel · Oct 11, 2015

Check this quiz: https://www.b4x.com/android/forum/t...-process-activities-life-cycle.37899/#content (code snippet #3).

ilan · Oct 11, 2015

Erel said:
Check this quiz: https://www.b4x.com/android/forum/t...-process-activities-life-cycle.37899/#content (code snippet #3).

After 2 years if i would make that mistake i would give up b4x.

I know that every app start activity create will be called, my question was (in different words) is a tabhost like a list?

When i add items to a list that is stored in process_globals i dont need to do it on every app start so i was thinking maybe a tabhost is like a list...

ilan · Oct 11, 2015

I really miss those quiz from you erel. Waiting for new ones...

Erel · Oct 11, 2015

ilan said:
I know that every app start activity create will be called, my question was (in different words) is a tabhost like a list?

TabHost is a UI element. UI elements cannot be declared in Process_Globals (because they hold a reference to the current activity). So you cannot treat it like a list.

ilan · Oct 11, 2015

Ok erel, it is now already clear for me that a tabhost is a ui element and not like a list.

Thank you anyway for making it more clear for me

Android Question Tabhost AddTabWithIcon ??

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