jobb

The jobb tool lets you build encrypted and unencrypted APK expansion files in Opaque Binary Blob (OBB) format. You can download and mount these expansion files in your application using StorageManager on devices with Android 2.3 (API Level 9) or higher. OBB files provide additional file assets for Android applications, such as graphics, sounds, and video, separate from an application's APK file. For more information on using expansion files, see APK Expansion Files.

Usage

The syntax for running jobb is as follows:

jobb [-d <directory>][-o <filename>][-pn <package>][-pv <version>] \
     [-k <key>][-ov][-dump <filename>][-v][-about]

You can use the jobb tool to create an OBB file or extract the contents of an existing OBB. The following example command creates an OBB file from source files:

$ jobb -d /temp/assets/ -o my-app-assets.obb -k secret-key -pn com.my.app.package -pv 11

This example shows how to dump the contents of an existing OBB file:

$ jobb -d /temp/obb-output/ -o my-app-assets.obb -k secret-key

Options

The table below lists the command-line options for the jobb tool:

Option	Description
`-d <directory>`	Set the input directory for creating an OBB file or the output directory when extracting (`-dump`) an existing file. When creating an OBB file,`jobb` includes the contents of the specified directory and all its sub-directories.
`-o <filename>`	Specify the filename for the OBB file. This parameter is required when creating an OBB and dumping its contents.
`-pn <package>`	Specify the package name for the application that mounts the OBB file, which corresponds to the `package` value specified in your application's manifest. This parameter is required when creating an OBB file.
`-pv <version>`	Set the minimum version for the application that can mount the OBB file, which corresponds to the `android:versionCode` value in your application's manifest. This parameter is required when creating an OBB file.
`-k <key>`	Specify a password for encrypting a new OBB file or decrypting an existing, encrypted OBB file.
`-ov`	Create an OBB file that is an overlay of an existing OBB file structure. This option allows the new package contents to mount into the same location as a previous package and creates patch versions of previously generated OBB files. Files within an overlay OBB file replace files that have the same path.
`-dump <filename>`	Extract the contents of the specified OBB file. When using this option, you must also specify the output directory for the contents using the `-d <directory>` parameter. Note: When dumping an existing OBB file, you can omit the `-d <directory>` parameter to get a listing of the directories inside the file without extracting the contents.
`-v`	Set verbose output for the tool.
`-about`	Display version and help information for the `jobb` tool.