I encountered this error while trying to use the RecoverySystem.installPackage API to apply an OTA update. This post shows what causes the error and how to walk around it. The error occurs for AOSP release android-6.0.1_r24 in my case.

Recently I needed to create a mirror of CyanogenMod to facilities further development of our smartphone testbed PhoneLab. The goal is to have a working mirror that we can stage any experimental changes on our own server, since there is no plan to publish such changes to upstream (at least for now). Quite surprisingly, I found this to be a non-trivial task. Here is a log of I walked around the minefield.

I this post I will talk about the extra steps to build a usable Lollipop (5.1.1) ROM for LG Nexus 5 (hammerhead) device. Most of the functionalities work out of box (bluetooh, Wifi tethering, camera, etc), but there are some show-stoppers.

AOSP ships with a bunch of tools that are very useful for platform release. I'll cover their usage and explain what they do in this post.

In my previous posts, I explained how to create a properly signed OTA package that will pass recovery's signature check, and how to verify the signed OTA package before apply it. Here, we'll discuss, when building an production AOSP platform, how to sign the platform and recovery image properly to match those signature checks.

Google has a fair document for building kernel for Android. Yet it didn't cover how to integrate the kernel with AOSP source tree so that kernel gets built along with whole platform, which I'll explain in this post. Here I'll mainly focus on android-4.4.4_r1 (Kitkat) for Nexus 5 (hammerhead). The instructions should be easy to adapt to other models or AOSP releases.

Recently, I need to build a working ROM for Nexus 5 from LG (hammerhead, here-forth). There are variety of tutorials and guide all over the web on the general steps needed to compile AOSP from scratch, which I do not intend to repeat here. Instead, I'll mostly focus on how to make the data connection (3G/LTE) working on Sprint phones.