Could not Sending All images from Android to flutter [closed] - flutter

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byte[] Renderer(String path)
{
File file = new File(path);
byte [] byteArray=null;
String ans="empty";
try
{
for(int i=0;i<count;i++)
{
//code for converting pages to images
}
return byteArray;
}
catch(Exception e)
{
byte[] h=null;
return h;
}
}
I have Created Renderer method for converting 10 pages to PNG image and send to the main.dart I have received only the last page but I want to display all the pages in my dart file.

Answer 1

In your Java for loop, you process each page but discard all but the last - you make a new byteArray for each page.
One solution is to return a list of all of the pages. In Java first declare an ArrayList
ArrayList bitmaps = new ArrayList();
Inside the for loop, add the compression result to the list:
bitmaps.add(outStream.toByteArray());
Finally, return bitmaps, rather than byteArray.
At the Dart end, you'll now get a List<Uint8List> rather than a single Uint8List, so change the signature of the method to:
Future<List<Uint8List>> pdfAsset() async
Obviously, you'll have to change the build method to deal with a list of bitmaps (one for each page) rather than a single bitmap (the last page).
(You may find that you need to change the signature to Future<List<dynamic>>, but you'll find that each of them is a Uint8List. Also, change the Java catch code to return an empty list.)