Provided by: zipalign_7.0.0+r33-1_amd64 bug


       zipalign - ZIP/APK alignment tool for Android application files


       To align and save it as

       zipalign [-f] [-p] [-v] [-z] align

       To confirm the alignment of

       zipalign -c [-v] align

       The align is an integer that defines the byte-alignment boundaries.  This must always be 4
       (which provides 32-bit alignment) or else it effectively does nothing.


       zipalign is an archive alignment tool that  provides  important  optimization  to  Android
       application (.apk) files.  The purpose is to ensure that all uncompressed data starts with
       a particular alignment relative to the start of the file.   Specifically,  it  causes  all
       uncompressed  data  within  the .apk, such as images or raw files, to be aligned on 4-byte
       boundaries.  This allows all portions to be accessed directly with  mmap()  even  if  they
       contain binary data with alignment restrictions.  The benefit is a reduction in the amount
       of RAM consumed when running the application.

       This tool should always be used  to  align  your  .apk  file  before  distributing  it  to
       end-users.  The Android build tools can handle this for you.  Android Studio automatically
       aligns your .apk after it signs it with your private key.  The  build  scripts  used  when
       compiling  your application with Gradle also align your .apk, as long as you have provided
       the path to your keystore and the key alias in your  project  file,  so
       that the build tools can sign the package first.

       Caution:  zipalign  must  only  be performed after the .apk file has been signed with your
       private key.  If you perform zipalign before signing, then the signing procedure will undo
       the  alignment.  Also, do not make alterations to the aligned package.  Alterations to the
       archive, such as renaming or deleting entries, will potentially disrupt the  alignment  of
       the  modified  entry  and  all later entries.  And any files added to an "aligned" archive
       will not be aligned.

       The adjustment is made by altering the size of the "extra" field in  the  zip  Local  File
       Header sections.  Existing data in the "extra" fields may be altered by this process.

       For more information about how to use zipalign when building your application, please read
       "Signing                                Your                                 Application":


       -c     Check alignment only (does not modify file)

       -f     Overwrite existing

       -p     Page align stored shared object files

       -v     Verbose output

       -z     Recompress using Zopfli




       The Android Open Source Project.

                                          22 August 2016                              ZIPALIGN(1)