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
 

Attachments

  • coverflow.jpg
    coverflow.jpg
    83.8 KB · Views: 2,325
  • coverflow2.jpg
    coverflow2.jpg
    81.1 KB · Views: 2,122
  • CoverFlow with Text.jpg
    CoverFlow with Text.jpg
    115.6 KB · Views: 1,533
  • B4ACoverFlow v.1.70.zip
    36.2 KB · Views: 413
  • B4ACoverFlow v.1.80.zip
    40.2 KB · Views: 414
  • B4ACoverFlow v2.0 fix.zip
    40.6 KB · Views: 1,008
Last edited:

margret

Well-Known Member
Licensed User
Longtime User
I been checking this out and it is really cool! I have hit an out of memory a few times with just 15 images. Does your lib, in the Coverflow.PopulateCoverflow load these images as BitmapSamples? I didn't know if this may contribute to the OM. It is very nice though!! Testing on ASUS TF 10.1" with Android 4.0.3.
 

lonleystar

Well-Known Member
Licensed User
Longtime User
I been checking this out and it is really cool! I have hit an out of memory a few times with just 15 images. Does your lib, in the Coverflow.PopulateCoverflow load these images as BitmapSamples? I didn't know if this may contribute to the OM. It is very nice though!! Testing on ASUS TF 10.1" with Android 4.0.3.
Hi margret, i just test it again with 1200 more jpg and i dont get out of memory i have Samsung Galaxy Tab - p1 with cyanogenmod 4.2.2 and with Samsung Galaxy Tab Note 2 10.1 with JB 4.1.2

let me know more, thanks again.
 

lonleystar

Well-Known Member
Licensed User
Longtime User
Is there a way before anyone has touched or moved the control to get the Value of the current item displayed? The same Value that:

Coverflow_ItemSelected(Position As Int, Value As Object)

Returns.
Hi margret, yes u r right the problem is in loadbitmap when u try to display an image more the 2 or 3 mb.
 

lonleystar

Well-Known Member
Licensed User
Longtime User
I have a question, I changed the AnimationDuration and I see no difference, even I did something like Coverflow.AnimationDuration = 50000

What am I doing wrong?
u r not wrog, AnimationDuration Sets how long a transition animation should run (in milliseconds) when layout has changed.
 

lonleystar

Well-Known Member
Licensed User
Longtime User
What about the question in Post #9?
about the question in Post #9 yes u r right the problem is in loadbitmap when u try to display an image more then 2 or 3 or 4 mb.

Also the size LoadBitmap das not display an image more then 1900 width X 1200 height
 
Last edited:

margret

Well-Known Member
Licensed User
Longtime User
Post #9 is below. The question is, there is no value for Value until the Item is clicked or you have moved the Coverflow left or right. I need the Value to have a value as soon as the display shows. At this point Value is Null. How can I get the Value of the centered Image upon display?

Is there a way before anyone has touched or moved the control to get the Value of the current item displayed? The same Value that:

Coverflow_ItemSelected(Position As Int, Value As Object)

Returns.
 

lonleystar

Well-Known Member
Licensed User
Longtime User
Post #9 is below. The question is, there is no value for Value until the Item is clicked or you have moved the Coverflow left or right. I need the Value to have a value as soon as the display shows. At this point Value is Null. How can I get the Value of the centered Image upon display?
Hi margret, u r right i just sow now sorry for the inconvenience, tomorrow i´ll fix thanks to report it.
 

jiangws

Member
Licensed User
Longtime User
HI lonleystar,

I got a error message:

Coverflow.PopulateCoverflow(File.DirRootExternal, "YOUR FODER HERE")
java.lang.NullPointerException


at it.giuseppe.salvi.ICOSCoverFlowActivity.PopulateCoverflow(ICOSCoverFlowActivity.java:228)
at it.giuseppe.salvi.coverflow.main._activity_create(main.java:257)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:167)
at it.giuseppe.salvi.coverflow.main.afterFirstLayout(main.java:89)
at it.giuseppe.salvi.coverflow.main.access$100(main.java:16)
at it.giuseppe.salvi.coverflow.main$WaitForLayout.run(main.java:74)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4575)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException
** Activity (main) Resume **

Could you tell me how to solve this?

Thanks
 

lonleystar

Well-Known Member
Licensed User
Longtime User
HI lonleystar,

I got a error message:

Coverflow.PopulateCoverflow(File.DirRootExternal, "YOUR FODER HERE")
java.lang.NullPointerException


at it.giuseppe.salvi.ICOSCoverFlowActivity.PopulateCoverflow(ICOSCoverFlowActivity.java:228)
at it.giuseppe.salvi.coverflow.main._activity_create(main.java:257)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:167)
at it.giuseppe.salvi.coverflow.main.afterFirstLayout(main.java:89)
at it.giuseppe.salvi.coverflow.main.access$100(main.java:16)
at it.giuseppe.salvi.coverflow.main$WaitForLayout.run(main.java:74)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4575)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException
** Activity (main) Resume **

Could you tell me how to solve this?

Thanks
hi jiangws, as NJDUDE told you, you have to replacemessage with the directory where you have your pictures.

Thanks to NJDUDE have answered for me.
 

lonleystar

Well-Known Member
Licensed User
Longtime User
You have to replace that message with the directory where you have your pictures.

For example:
B4X:
Coverflow.PopulateCoverflow(File.DirRootExternal, "Pictures")

Might be different on your device.
Hi NJDUDE , i have a little problem when i try to put in my signature the donation I don't know where I'm wrong please can u write a little guide so i can put my own donation in my signature. thanks in advance.
 
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