Android OTA upgrade package maker

0. Signature

Java-xmx2048m-jar out/host/linux-x86/framework/signapk.jar-w BUILD/TARGET/PRODUCT/SECURITY/TESTKEY.X509.PEM Build /target/product/security/testkey.pk8

This key is the auto-generated key in debug mode.

You can also create your own private key via OpenSSL.

The OTA package will automatically sign with the generated key, and the location of the OTA upgrade package is as follows

│[ota Package]

│└─meta-inf

│cert. Rsa

│cert. SF

│manifest. Mf

│└─com

│---└─android

│------Otacert

1. Make an OTA upgrade package using the Android Packaging command

Complete the project before executing make Otapackage

The resulting full upgrade package will be stored under Out\debug\target\product\[project name]\

The exact name is based on the install of make otapackage.

The resulting process file package is in the out/target/product/ardbeg/obj/packaging/target_files_intermediates/directory, which can be used to create a differential upgrade package

Modification of 2.OTA Packages

1) Update-script

OTA package decompression After the Meta-inf\com\google\android directory has two files

Update-binary is a binary file that is equivalent to a script interpreter that recognizes the operations described in Updater-script. This file is generated after the Android source code is compiled Out/target/product/tcc8800/system bin/updater, you can rename the updater to update-binary.
The name of the file in the specific update package is determined by the value of the macro assumed_update_binary_name in bootable/recovery/install.c in the source code.

Updater-script: This file is a script file that describes the update process. We can write this script to suit our specific needs. The name of the file is determined by the value of the macro script_name in the Bootable/recovery/updater/updater.c file in the source code.

Upgrade the progress bar, upgrade which files are specified in this script. If you need to modify a packaged file, this typically modifies the script or the resource file in the replacement package as the main

About this online description of more, no longer stated, can refer to

[Practical Tutorial]_ Updater-script script on Rom http://wenku.baidu.com/link?url=PBCuu50VRxDzx_ 1wb5jfyzh-ourgyhmtydvq5sgkspzqfp3ww6dbegifqszyjvzp3037ostx-aefmsax5nnmh6cycjoudaxo1jm0bfromi3

2) Recovery Code

[Src path]\bootable\recovery

where BOOTABLE\RECOVERY\UPDATER\INSTALL.C

The child functions registered in the function can be called directly in the Update-script script.

Some embedded products, bootloader, boot screen and other partitions of the burning write read are their own definition, need to update this partition needs in the registration function, the addition of private functions

3) Modify the resulting upgrade package

Unzip the Update.zip and modify the Update-script script and resource files according to the above rules

RePack, remember to pack in storage mode , and never choose any way to compress content. Otherwise the signature will fail

Then refer to the No. 0 manual signature new package file Brush machine can be

3.OTA Differential Upgrade Package

Make Otapackage the new and old two packs respectively.

The package file used to make the differential package is in the following directory

out/target/product/ardbeg/obj/packaging/target_files_intermediates/

Due to the need to brush to the old version before the use of differential packets, it is necessary to do version management of the intermediate files and the entire package are saved, respectively, in the following path (need to generate a matching version)

Out/target/product/[produce name]/obj/packaging/target_files_intermediates/

Out/target/product/[produce name]/

Generate a differential packet with the new and old obj directory counterpart file

mkdir ota/cp xxxx_obj.zip  OTA/OLD_OBJ.ZIPCP yyyy_obj.zip ota/new_obj.zip//Online We recommend running the build tool in the source root directory, which is said to use the root relative path. Build/tools/releasetools/ota_from_target_files-v-n-i ota/old_obj.zip ota/new_obj.zip OTA/diff.zip

This generates a differential packet that can be upgraded with this differential package in the version of the old product.

Error http://blog.csdn.net/kangear/article/details/23831431 during the production of differential packets

　　

Android OTA upgrade package maker