How to Create Android Update Zip Package

There are several ways to install applications or library files to anAndroidPhone. You can useMarketapplication to find and install oradbcommand line tool to install or push the files to Android file system. These are all easy to implement for single file but if you have several applications or library files to install at once, it might be better to useupdate zipfile. The update zip file is Android advanced system to install applications or lib files to Android file system using recovery tool. This method is commonly used by rom or theme developers to distribute their package.

Creating an update zip file is quite easy, all you have to do is put the files in corresponding directory in Android file system and anupdate-scriptfile to copy the files. For example, to installCalculator.apkintosystem/appand copylibsec-ril.sofile intosystem/lib:

• Create an empty folder (eg. C:\myupdate)
• CreateC:\myupdate\system\appfolder forCalculator.apkandC:\myupdate\system\libfolder forlibsec-ril.so
• CreateC:\myupdate\META-INF\com\google\androidfolder forupdate-scriptfile.
• Create theupdate-scriptfile with the following syntax:

  show_progress 0.1 0copy_dir PACKAGE:system SYSTEM:show_progress 0.1 10

  Line 1&5 : show progress bar
  Line 3: copysystemfolder from update package to Android’s/system

  Note: you should add one extra line at the end of the file (Line 6)

• Compress the entire contents ofC:\myupdatefolder to zip (not themyupdatefolder itself)
• Sign themyupdate.zipfile

  java -jar signapk.jar certificate.pem key.pk8 myupdate.zip update.zip

  Note: you can find tutorial on how to sign the update.zip filehere

• Copy theupdate.zipfile to sdcard and apply it from recovery console

update-script syntax reference (definitions from recovery.c android source code):

• copy_dir

  Syntax:copy_dir <src-dir> <dst-dir> [<timestamp>]
  Copy the contents of <src-dir> to <dst-dir>. The original contents of <dst-dir> are preserved unless something in <src-dir> overwrote them.
  Ex:copy_dir PACKAGE:system SYSTEM:

• format

  Syntax: format <root>
  Format a partiti0n
  Ex:format SYSTEM:, will format entire/system. Note: formatting erases data irreversibly.

• delete

  Syntax:delete <file1> [... <fileN>]
  Delete file.
  EX:delete SYSTEM:app/Calculator.apk, will deleteCalculator.apkfromsystem/appdirectory.

• delete_recursive

  Syntax:delete_recursive <file-or-dir1> [... <file-or-dirN>]
  Delete a file or directory with all of it’s contents recursively
  Ex:delete_recursive DATA:dalvik-cache, will delete/data/dalvik-cachedirectory with all of it’s contents

• run_program

  Syntax:run_program <program-file> [<args> ...]
  Run an external program included in the update package.
  Ex:run_program PACKAGE:install_busybox.sh, will runinstall_busybox.shscript (shell command) included in the update package.

• set_perm

  Syntax:set_perm <uid> <gid> <mode> <path> [... <pathN>]
  Set ownership and permission of single file or entire directory trees, like ‘chmod’, ‘chown’, and ‘chgrp’ all in one
  Ex:set_perm 0 2000 0550 SYSTEM:etc/init.goldfish.sh

• set_perm_recursive

  Syntax:set_perm_recursive <uid> <gid> <dir-mode> <file-moe> <path> [... <pathN>]
  Set ownership and permission of a directory with all of it’s contents recursively

  Ex:set_perm_recursive 0 0 0755 0644 SYSTEM:app

• show_progress

  Syntax:show_progress<fraction> <duration>
  Use of the on-screen progress meter for the next operation, automatically advancing the meter over <duration> seconds (or more rapidly if the actual rate of progress can be determined).
  Ex:show_progress 0.1 0

• symlink

  Syntax:symlink <link-target> <link-path>

  Create a symlink (like ‘ln-s’). The <link-path> is in root:path format, but <link-target> is
  for the target filesystem (and may be relative)

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用Android自带的signapk.jar + .x509.pem + .pk8签名应用程序