java - In Android, is it necessary to loop through all files/directories in a zip to read content from a file at known location? -

java - In Android, is it necessary to loop through all files/directories in a zip to read content from a file at known location? -

i want read first line of file within zip file. using while loop 1 sample stackoverflow quesion link

but know exact location of file within zip. , zip file big(can more 500mb).

so i'm thinking there way read file without looping through files using while.

use zipfile instead of zipinputstream. reads zip file's central directory (see wikipedia article) , not whole file. can utilize entries() or getentry(java.lang.string) , getinputstream(java.util.zip.zipentry) input stream entry:

string entryname = // set name of entry here file file = // set zip file here zipfile zipfile = null; seek { zipfile = zipfile(file); zipentry zipentry = zipfile.getentry(entryname); inputstream = null; seek { = zipfile.getinputstream(zipentry); // read stream here e.g. using bufferedreader } grab (ioexception ex) { // todo: handle exception or delete grab block } { if (is != null) { seek { is.close(); } grab (ioexception ex) { } } } } { if (zipfile != null) { zipfile.close(); } }

java android file file-io zip