Android Dev Question: Why call back to the superclass?

Recently purchased this book: http://www.amazon.com/Professional-Android-Application-Development-ebook/dp/B007SR7NOO/ref=pd_sim_kstore_14?ie=UTF8&m=AG56TWVU5XWC2

In Chapter 3, the section discussing “Activity state event handlers” ends with this statement:

As shown in the preceding code, you should always call back to the superclass when overriding these event handlers.

So simple question… Why?

Putting sqlite3 on my Galaxy Nexus

Followed the steps on this page: http://stackoverflow.com/questions/3645319/why-do-i-get-a-sqlite3-not-found-error-on-a-rooted-nexus-one-when-i-try-to-op

Note: They look the same and should give the same result, but only did the steps that copy the binary to /sdcard first.

The sqlite3 binary came from an AVD VM I created.  I used ‘adb’ to pull it off the VM.

I’ll also include a copy/paste of the steps:

$ adb push sqlite3 /sdcard/

$ adb shell

$ su

# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system

# dd if=/sdcard/sqlite3 of=/system/bin/sqlite3

# chmod 4755 /system/bin/sqlite3

# mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system

(OBE) Rooting My Verizon Galaxy Nexus

OBE: No longer works after receiving OTA v4.2.2  🙁   This may push me into unlocking the bootloader.

Followed the guide at this link:  http://androidforums.com/international-galaxy-nexus-all-things-root/502204-galaxy-nexus-root-un-root-without-unlocking-bootloader.html

Used on a Galaxy Nexus using v.4.0.2 prior to receiving an OTA.

Note: The official Samsung USB drivers for the Galaxy Nexus work.  No need to do the USB or FastBoot drivers step.

And don’t forget to DL OTA Rootkeeper.