B4A Library StdActionBar - Another ActionBar library

StdActionBar (Standard ActionBar) library is based on the native ActionBar API, therefore it is only supported by Android 4+.

StdActionBar / StdViewPager tutorial: ActionBar / Sliding Pages tutorial

The share of Android 2.x devices is dropping and currently (January 2014) it is only 24%.

This library allows you to add tabs and dropdown list to the action bar:

upload_2014-1-16_17-20-37.png
upload_2014-1-16_17-21-7.png


The attached example demonstrates both modes. You should change the navigation mode to see the two modes.

List mode

Adding a list is very simple. You set the NavigationMode:
B4X:
bar.NavigationMode = bar.NAVIGATION_MODE_LIST
Add the items:
B4X:
bar.SetListItems(Array As String("Dropdown 1", "Dropdown 2", "Dropdown 3"))

And handle the event:
B4X:
Sub bar_ListItemSelected (Index As Int, Value As String)
   Log("Selected value: " & Value)
End Sub

Tabs mode

Unlike TabHost, the tabs do not hold any views. You are responsible for switching the layout based on the selected tab.

The first step is to set the navigation mode:
B4X:
bar.NavigationMode = bar.NAVIGATION_MODE_TABS

Then we add the tabs:
B4X:
bar.AddTab("Tab 1")
bar.AddTab returns a StdTab object. We can use it to modify the tabs:
B4X:
bar.AddTab("Tab 1").Tag = panel1
bar.AddTab("Tab 2").Tag = panel2
'Add icon to tab 3
Dim tb As StdTab = bar.AddTab("Tab 3")
tb.Tag = panel3
Dim bd As BitmapDrawable
bd.Initialize(LoadBitmap(File.DirAssets, "ic_small.png"))
tb.Icon = bd
In the above code we add three tabs and use the tabs tag property to store a panel in each tab. Later we will use these panels to switch the layout.

When the TabChanged event is raised we clear the current layout and show the new layout.
B4X:
Sub bar_TabChanged(Index As Int, STab As StdTab)
   Activity.RemoveAllViews
   Dim pnl As Panel = STab.Tag
   Dim height As Int
   If 100%y > 100%x Then
     height = 100%y - 48dip 'fix for the additional tabs height
   Else
     height = 100%y
   End If
   Activity.AddView(pnl, 0, 0, 100%x, height)
   If pnl.NumberOfViews = 0 Then
     pnl.LoadLayout(Index)
   End If
End Sub

Note that the attached example uses the Holo.Light theme. This is done with this manifest editor line:
B4X:
SetApplicationAttribute(android:theme, "@android:style/Theme.Holo.Light")

V1.52 is released. Fixes an incompatibility with Android 5.0. Note that the ButtonClicked event will not work on these devices.

You should use Activity_ActionBarHomeClick event instead.
 

Attachments

  • StdActionBarExample.zip
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  • StdActionBar.zip
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