jListView with image
lazarus / 43-Android

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xinyiman · 2023-04-06 14:05

Someone explain to me how to put in a listview an image (loaded at
runtime retrieved from a record in sqlite) aligned left and the text
in the center.
I need it to be able to preview a series of products combined with
their name. A thousand thanks

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jmpessoa · 2023-04-06 14:35

Hi, xinyiman!

If you can retrieve the image from a record in sqlite....

then you can try some code like theses [events]:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i procedure
TAndroidModule1.ListView1DrawItemBitmap(Sender: TObject;  itemIndex:
integer; itemCaption: string; out bimap: JObject);begin  if itemIndex
= 1 then   //only item index = 1 has a image ...  begin    bimap:=
ImageFileManager1.LoadThumbnailFromAssets('lemur_funny.png', 72, 72); 
end;end; 
or

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i procedure
TAndroidModule1.ListView1DrawItemWidgetBitmap(Sender: TObject; 
itemIndex: integer; widgetText: string; out bimap: JObject);begin  if
itemIndex = 1 then   //only item index = 1 has a image ...  begin   
bimap:= ImageFileManager1.LoadThumbnailFromAssets('lemur_funny.png',
72, 72);  end;end;

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xinyiman · 2023-04-06 14:49

I was thinking of saving images in base64 in text field. How do I then
convert them to bitmaps?

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jmpessoa · 2023-04-06 15:21

You can try "jBitmap component" methods:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i    
function GetBase64StringFromImage(_bitmap: jObject; _compressFormat:
TBitmapCompressFormat): string;    function
GetBase64StringFromImageFile(_fullPathToImageFile: string): string;  
 function GetImageFromBase64String(_imageBase64String: string):
jObject;  // <-- try this!