Can you use NativeProcess or a NativeExtension to run the IOS unzipper?
On 5/9/13 6:07 AM, "Deepak MS" <[email protected]> wrote: > Hi there, > > Recently I had been working on an iPad app using Flex\AIR, which downloads > a database file on the device and works as an offline app. > > But since file was very huge(150 - 500MB), I was asked if we can zip the > file to cut down the download time on the device. I did try using Airxzip, > FZip etc. But all of them ultimately use ByteArray.uncompress() method to > unzip the file. It works just fine in case of desktop\web apps. But when it > comes to mobile\iPad apps, memory is a huge constraint. When I tried to > unzip a zipped file(size was 20MB, uncompressed size was around 80MB) using > ByteArray.uncompress(), it worked fine on the device with 512MB RAM. But > When I try to unzip a zipped file beyond 100MB(size was 100MB, uncompressed > size was around 320MB), the app gets crashed. > > I felt, since uncompress method tries to unzip the file in a single go, it > runs out of memory and apparently the app crashes. > > Just wanted to know if there is any way we can unzip those huge files byte > wise? That is, instead of unzipping the entire file in one single shot, can > we keep some predefined buffer size and unzip them? Something like this, > which I reckon is in Java: > http://stackoverflow.com/questions/14218178/how-to-unzip-large-zip-file-write- > to-sdcard-in-less-time > > ZipArchive for iOS too works very fine for huge file unzipping. > > I still haven't got any alternative solution to it. I am downloading those > huge raw files direclty and using them without unzipping. It's really a > pain for the customers to wait for 2 - 3 hours to download the file. > > Any thoughts on how we can go about it? > > > -Deepak -- Alex Harui Flex SDK Team Adobe Systems, Inc. http://blogs.adobe.com/aharui
