CODEWITHSUNDEEP
javaandroidout-of-memoryzip
Egor
Egor

Reputation: 40203

OutOfMemoryError reading a huge ZipFile

I'm trying to open a big (around 1 GiB) zip file in Android using java.util.zip API and get the following error:

java.lang.OutOfMemoryError
at java.util.HashMap.makeTable(HashMap.java:555)
at java.util.HashMap.doubleCapacity(HashMap.java:575)
at java.util.HashMap.put(HashMap.java:405)
at java.util.zip.ZipFile.readCentralDir(ZipFile.java:366)
at java.util.zip.ZipFile.<init>(ZipFile.java:132)
at java.util.zip.ZipFile.<init>(ZipFile.java:103)
at com.foo.bar.zip.archive.ZipArchive.<init>(ZipArchive.java:44)

I completely understand that the size of the file exceeds the memory limit by a big margin, but is there any workaround for the issue? Thanks in advance.

Upvotes: 2

Views: 1584

Answers (5)

Dipak Keshariya
Dipak Keshariya

Reputation: 22291

Please see below link for download and extract zip files, it will solve your problem.

For Downloading Zip File:-

Download Zip File

For Extract Zip File:-

Extract Zip File

And the zip file is make using winrar software only otherwise this will give you error.

Upvotes: 0

Ian Roberts
Ian Roberts

Reputation: 122364

Do you need to be able to extract particular entries from the zip file by name, or can you just read through the whole file once from top to bottom? If the latter you could try using ZipInputStream rather than ZipFile, as that doesn't need to parse the central directory up front - you can read one entry, do something with it, discard it, read the next entry, ...

Upvotes: 4

Ion Aalbers
Ion Aalbers

Reputation: 8030

The Java classes ZipFile and ZipEntry can't contain anything that is more then 613 MB of memory.

It's probably best to implement some sort of batching as you propose yourself. You could for example add up the decompressed size of each ZIP entry and upload the files every time the total size exceeds 100 MB.

Take a look at: http://truezip.java.net/

Upvotes: 4

Peter Lawrey
Peter Lawrey

Reputation: 533530

I suspect the problem is not the size of the file but the number of entries as it is failing when caching the Zip table entries.

Your own options are to;

  • break up the Zip so it doesn't have so many files in it.
  • get more memory
  • write your own library for reading the ZIP.

Upvotes: 6

user
user

Reputation: 3088

You could try to read your file in byte arrays and partially work over it. Still it depends on what do you want to do with your file.

Upvotes: 0

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