Downloading files from server - php

Question

In my project I have a code for downloading images from a server. In php code I have:
if (is_dir($dir)){ //check if is directory
$files = scandir($dir); //list files
$i=-1;
$result = array();
foreach($files as $file){
$file = $dir.$file; //complete dir of file
if(is_file($file)){ //if it's a file
$i++;
$fileo = #fopen($file,"rb"); //open and write it on $result[$i]
if ($fileo) {
$result[$i] = "";
while(!feof($fileo)) {
$result[$i] .= fread($fileo, 1024*8);
flush();
if (connection_status()!=0) {
#fclose($fileo);
die();
}
}
$result[$i] = utf8_encode($result[$i]); //This prevents null returning on jsonencode
#fclose($fileo);
}
}
}
}else{
echo json_encode(array('Error'));
}
echo json_encode($result); //returns images as an array of strings, each one with all code of an image.
And in java I have an httpost method with asynctask. The problem of this is that I need to wait until all images are downloaded. I have thought that maybe I can download an image with a number and if the number is 0 for example recall to the server to download the next image but I think that maybe is a waste of time calling again the server and listing files again. Is there a better way so I can download image per image instead of all at the same time without calling N times to the sever?

Answer 1

I've had the same problem that you are having, and my solution was the next:
1º Download all data you need
2º Download to the computer the image web direction
3º Execute an asynctask per Image to download it and update your Activity while is needed
Maybe i'm not so exact and i would need some more details to give a better solution.