B4A Library [Lib] CoverFlow v2.0

Hi guys, as I have promised, CoverFlow is here.

Download the Coverflow.zip

The zip contains the library and an example that´s all


The CoverFlow Class = Neil Davies




B4ACoverFlow
Author: Giuseppe Salvi
Version: 2

• PhotoFlow
  Events:
  • ItemClick (Position As Int, Value As Object)
  • ItemLongClick (Position As Int, Value As Object)
  • ItemSelected (Position As Int, Value As Object)
  Methods:
  • AddImage (Dir As String, FileName As String)
    Add an image at the end of the PhotoFlow from sdcard or AssetsDir
    Example:
    PhotoFlow.AddImage(File.DirRootExternal,"a.jpg")
  • AddImageAt (index As Int, Dir As String, FileName As String)
    Add an image to the desired position in the PhotoFlow from sdcard or AssetsDir
    Example:
    PhotoFlow.AddImage(1,File.DirRootExternal,"a.jpg")
  • BringToFront
  • ClearCache
    Delete entire disk and memory cache created before
  • GetImageListFromAssets (path As String) As List
    Get entire list of images stored in assets folder
    Examples:
    Dim lv as ListView
    Dim l as list
    l.Initialize
    lv.Initialize("lv")
    Sub Menu_Click
    Activity.AddView(lv,0,0,100%x,100%y)
    l = Coverflow.GetImageListFromAssets("Here the Images path u've in assets")
    For n = 0 To l.Size-1
    lv.AddSingleLine(l.Get(n))
    next
    End Sub
  • GetItem (position As Int) As String
    Returns Item
    Example:
    i.Bitmap=LoadBitmap("",PhotoFlow.GetItem(Position))
  • InitializeCarousel (EventName As String)
    Initialize the Carousel
  • InitializeCoverflow (EventName As String)
    Initialize the PhotoFlow
  • IsInitialized As Boolean
  • PopulatePhotoFlow (dir As String, path As String)
    Populate PhotoFlow from sdcard not from assets
  • PopulatePhotoFlowFromAssets (path As String)
    Populate CoverFlow from assets not from sdcard
  • RemoveView
  • SendToBack
  • SetBackgroundImage (arg0 As Bitmap)
  • SetLayout (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int)
  Permissions:
  • android.permission.WRITE_EXTERNAL_STORAGE
  Properties:
  • AnimationDuration As Int [write only]
    Sets how long the transition animation should run when a child view changes position.
  • Carousel As Boolean [write only]
    Set as Carousel
  • Color As Int [write only]
  • CreateCache As String [write only]
    Sets the name of your own cache
    Examples:
    PhotoFlow.CreateCache = "Your cache Name Here")
    It'll create a cache in "Android/data/Your cache name/cache/.thumbs" in to SdCard
  • Enabled As Boolean
  • FadingEdgeLength As Int [write only]
    Set the size of the faded edge used to indicate that more content in this view is available.
  • Height As Int
  • ItemHeight As Int
    Get or Set ItemHeight
  • ItemWidth As Int
    Get or Sets ItemWidth
  • Left As Int
  • Length As Int [read only]
    Returns lenght
  • Reverse As Boolean [write only]
    Set reverse
  • Selection As Int [write only]
    Jump directly to a specific item in the adapter data.
  • ShowText As Boolean
    Get or Sets the visibility of the text - by default is hide
  • Spacing As Int [write only]
    Sets the spacing between items in a Gallery
  • Tag As Object
  • TextColor As Int
    Get or Sets Text Color - by default is White
  • TextSize As Int
    Get or Sets Text size
  • Top As Int
  • Version As String [read only]
    Return Author and Version of this library
  • Visible As Boolean
  • Width As Int

 

[lonleystar]

Hi Mrjoey, thx for the suggestion.

 

[ronovar]

Hi. Just to ask how is going progress with Vertical Flow.

Thanks.

 

[lonleystar]

Hi the progress is going on but I've some problem to fit images and text but I'll resolve it soon be patience.

 

[ronovar]

No hurry, i have just ask...i know that there is a loot of javascript cooding...so i will wait.

Do You have any good tutorial how can i write library for B4A using java code? I diassembled some apk and would like to copy code and make library for one component from this apk.I need tutorial to learn how to write library.

Thanks.

 

[lonleystar]

Hi, take a look to this link below.

Tutorial about development of libraries.

 

[Mrjoey]

hello lonelystar , i noticed that when u scroll , the image is loaded , do u mind to share some codes about doing that? i have lots of images i want to add to list , so instead of adding them directly using a loop wish becomes slow , it would fill the list and when the list is finished it will fill then the images hope u did understand my point , any suggestions are appreciated , tnx man keep forward

 

[lonleystar]

Hi MrJoey, I think I understand, but can U make an example in B4Android?.

 

[Mrjoey]

Hi MrJoey, I think I understand, but can U make an example in B4Android?.

Sub ScrollView1_ScrollChanged(Position As Int)
'If Ind < (mapa.Size/9 )-1 Then
    If Position + ScrollView1.Height >= ScrollView1.Panel.Height Then
    If DateTime.Now > lastAddItemsTime + 1 Then
      lastAddItemsTime = DateTime.Now
    CallSub(Me,"ReadAudios")
    End If
  End If
'End If 
End Sub

this code loads additional items when the scrollview reaches a specific number of items so lets say there is 20 panels added to this scrollview and instead of making a loop to fill that 20 panels once , it add let say 10 and then when the user scrolls down it will add the other 10 , that way is very efficient and public , i think u are using this method in kind of ways , i would like u to share an idea of urs to display images instead , tnx

 

[lonleystar]

Hi Mrjoey, It's based on true Gallery and not on ScrollView if U mean this.

U can not do that because it fill up an Array, but I'll tray it.

 

[ronovar]

Hi, i im playing with this excellent library and would like to ask if is possible to get images direct from httputils2 using Job.GetBitmap.

I would like to fill coverflow with images from my url link of my server, not to save it to device.

So i have sucessfully used this:

CoverFlow1.SetBackgroundImage(Job.GetBitmap)

but this sets last image retrieved from server, witch is what i expected.

So i need the code if is possible to add image to CoverFlow instead of saving it to device.

For example:

CoverFlow1.AddImageFromUrl(Job.GetBitmap)

 

[lonleystar]

HI ronovar, yes I'm working on it.

It'll be soon updated like B4AGallery + (AddImageFromUrl , AddImageFromUrlAt , PopulatePhotoFlowFromUrl)

 

[ronovar]

Ok...thanks... It will be great to have this feautures in library.

 

[Mrjoey]

hey , 1 suggestion for next update , im using B4Agallery , and there is a function called setarraylist , can u include it in coverflow? thank u

 

[lonleystar]

Hi Mrjoey, this week B4ACoverFlow and B4AGridView both will be updated as the B4AGallery I haven't forgotten.

Just now I finished fixing ICOSWorldForecastFree.

 

[Mrjoey]

aha appreciate ur hardwork , take ur time man , so this update will coverflow includes setarraylist or the next update u mean?

 

[lonleystar]

Hi, this update.

 

[Mrjoey]

wow , thank u so much man

 

[ronovar]

Hi, sorry to bother you...can you post progress on VerticaFlow.

Many Thanks.

 

[aignatd]

Can coverflow changes automatically within a certain time period ?

 

[lonleystar]

Hi ronovar, u r right i suspend it because i still find the problem to fit together the text and the images but dont be worry i'll finish it soon promise.