Android Question How can i make a simple scrollable picture activity ?

[GMan]

Hoi Friends,

how (means with which lib or View) can I make a scrollable list of pictures ?
Zooming would be nice, but is no "must have"

Thx in advance

 

[DonManfred]

The simplest is a ListView
Customlistview more advanced possibilities
But you should use a Recycling view... You will fast run into Memory problems when using lot of images

 

[GMan]

Hoi Manfred,
Thx for that - i read about the memory problem but there a only these some pictures, which i will scale down, too

 

[GMan]

I used a listview, but the pics are very small.
Is there a way to Zoom when touching OR displaying the Picx larger ?
Here it my code so far for 3 Pics:

    ListViewFoto.AddTwoLinesAndBitmap("PFLASTERARBEITEN", "Beispiel 1", LoadBitmap(File.DirAssets,"1.jpg"))
     ListViewFoto.AddTwoLinesAndBitmap("PFLASTERARBEITEN", "Beispiel 2", LoadBitmap(File.DirAssets,"2.jpg"))
      ListViewFoto.AddTwoLinesAndBitmap("PFLASTERARBEITEN", "Beispiel 3", LoadBitmap(File.DirAssets,"3.jpg"))

 

[klaus]

You can define the dimensions for the entries, but the same for all entries

ltvTest.TwoLinesAndBitmap.ItemHeight

ltvTest.TwoLinesAndBitmap.Label.Left
ltvTest.TwoLinesAndBitmap.Label.Top
ltvTest.TwoLinesAndBitmap.Label.Width
ltvTest.TwoLinesAndBitmap.Label.Height

ltvTest.TwoLinesAndBitmap.SecondLabel.Left
ltvTest.TwoLinesAndBitmap.SecondLabel.Top
ltvTest.TwoLinesAndBitmap.SecondLabel.Width
ltvTest.TwoLinesAndBitmap.SecondLabel.Height

ltvTest.TwoLinesAndBitmap.ImageView.Left
ltvTest.TwoLinesAndBitmap.ImageView.Top
ltvTest.TwoLinesAndBitmap.ImageView.Width
ltvTest.TwoLinesAndBitmap.ImageView.Height

You must define this before you add any entry.

 

[GMan]

Thx a lot U2 - works like a charm ;-)
But looks like...not what i wanted.
The .Text1. appears in white (not good)
The .Text2. appears in black (good)

So, (nearly i'd wrote HTF ;-) ) how can i change the color to black, too ?

 

[klaus]

ltvTest.TwoLinesAndBitmap.Label.TextColor = Colors.Black
Label and SecondLabel are Labels with all their properties.

 

[Erel]

Check this example: https://www.b4x.com/android/forum/t...ore-when-scroll-tot-bottom.35761/#post-210230
It loads more items when the user scrolls the list. You should do something like this to avoid loading all images.

 

[GMan]

Thx U2 ;-)
on some devices (depending on the RAm i think) the App hung when calling the picture gallery.
So i simply reduced the amount of pics and placed a link to the Web-picture gallery.
The external browsers can handle that better i think, too

 

[ilan]

u could us the ULV from informatix for that or maybe this lib https://www.b4x.com/android/forum/threads/library-b4agallery-v3-55.24963/

or this https://www.b4x.com/android/forum/threads/lib-class-customgallery.20082/#content