[LAMW]How to read all the thumbnails saved in the system database?
lazarus / 43-Android

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lazpas · 2022-09-15 06:38

Hi,guys

How to read all the thumbnails saved in the system database? According
to the data, it is in the data/data/android.providers.media/database/
folder.

Thanks.

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lazpas · 2022-09-19 01:18

I found this javacode,here
https://www.geeksforgeeks.org/how-to-build-a-photo-viewing-
application-in-android/

How do it with lamw?

Thanks

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jmpessoa · 2022-09-19 23:09

QuoteI found this java code,here.....

But in that code the real images are saved in SDCard as you can read
on "a method to get all images from our external storage."

and "thumbnails" are just a preview..... is this what you want to
implement?

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lazpas · 2022-09-20 00:43

hi,

I'm planning to write an image browser that needs to read all the
images first and display them in a list (thumbnails of a specified
size), and when a thumbnail in the list is clicked open another window
to display the real size images.
If you directly read the real-size image and convert it to the
specified size, the speed is very, very slow.

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jmpessoa · 2022-09-25 23:01

Well, now you can use "jImageFileManager" component  to load a image
as "thumbnail"....


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.AndroidModule1JNIPrompt(Sender: TObject);begin 
 //only test...   ListView1.Add('Item 1');   ListView1.Add('Item 2'); 
 ListView1.Add('Item 3');   ListView1.Add('Item 4'); 
 ListView1.Add('Item 5');   ListView1.Add('Item 6');end; procedure
TAndroidModule1.ListView1DrawItemBitmap(Sender: TObject;  itemIndex:
integer; itemCaption: string; out bimap: JObject);begin  if itemIndex
= 1 then   //only test ....  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.AndroidModule1JNIPrompt(Sender: TObject);begin 
 //only test...   ImageView1.SetImage(ImageFileManager1.LoadThumbnailF
romAssets('lemur_funny.png', 144, 144));    //or .... here you need
handle permissions!   //ImageView1.SetImage(ImageFileManager1.LoadThum
bnailFromFile(Self.GetEnvironmentDirectoryPath(dirSdCard)+
'/lemur_funny.png', 144, 144));end;

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lazpas · 2022-09-26 00:35

Thank you,jmpessoa.

I will try it.