Reading files from a ZIP file in your Android assets folder

Question

I\'m reading files from a ZIP file that\'s located in my Android assets folder using ZipInputStream: it works, but it\'s really slow, as it has to read it seque

Answer 1

You can create a ZipInputStream in the following way :

ZipInputStream zipIs = new ZipInputStream(context.getResources().openRawResource(your.package.com.R.raw.filename)); 
ZipEntry ze = null;

        while ((ze = zipIs.getNextEntry()) != null) {

            FileOutputStream fout = new FileOutputStream(FOLDER_NAME +"/"+ ze.getName());

            byte[] buffer = new byte[1024];
            int length = 0;

            while ((length = zipIs.read(buffer))>0) {
            fout.write(buffer, 0, length);
            }
            zipIs .closeEntry();
            fout.close();
        }
        zipIs .close();

Answer 2

You can store the uncompressed files directly in assets (i.e. unpack the zip into assets/ folder). This way, you can access the files directly and they will be compressed anyway when you build the APK.

Answer 3

This works for me:

private void loadzip(String folder, InputStream inputStream) throws IOException
{
    ZipInputStream zipIs = new ZipInputStream(inputStream); 
    ZipEntry ze = null;

            while ((ze = zipIs.getNextEntry()) != null) {

                FileOutputStream fout = new FileOutputStream(folder +"/"+ ze.getName());

                byte[] buffer = new byte[1024];
                int length = 0;

                while ((length = zipIs.read(buffer))>0) {
                fout.write(buffer, 0, length);
                }
                zipIs.closeEntry();
                fout.close();
            }
            zipIs.close();
}