Fragmented - AI Developer Podcast

By Kaushik Gopal, Iury SouzaScience Technology Education

Fragmented - AI Developer Podcast episodes

March 14, 2016032: Making sense of Android Support Library version numbers
The Android Support library framework is the biggest boon to Android developers. But how does one makes sense of the different versions and revisions available? In this fragment we try to address that question.
Show Notes
Introducing AppCompat V21 [android-developers.blogspot.com]
[android-developers.blogspot.com]
Prev episode with Mike Wolfson [fragmentedpodcast.com]
Android Support Library - "Revision" changelog [developer.android.com]
Revision vs Version [stackoverflow.com]
Introducing Design Support Library
Command to see dependency graph: ./gradlew -q app:dependencies
Seinfeld Auditions
Contact
Fragmented Spec channel (sign up at the bottom)
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
Contact email form
13 min
March 07, 2016031: Effective Java - Item 8
In this mini Fragment, we introduce Joshua's eighth Item. This one is a doozy, probably one of the longest items in the group of the effective Java series, but most definitely quite important.
This episode is brought to you by Rollbar. Go to rollbar.com/fragmented to get their Bootstrap plan for free for 90 days.
Stay tuned for more items from our "Effective Java for Android developers" Fragment series.
Show Notes
Effective Java (2nd Edition) - Joshua Bloch
Obey the general contract when overriding equals
When to not override equals:
Each instance of the class is inherently unique.
You don't care whether the class provides a "logical equality" test.
A superclass has already overridden equals, and the superclass behavior is appropriate for this class.
The equals method implement an equivalence relation which states it must be:
Reflexive
Symmetric
Transitive
Consistent
For any non-null reference x, x.equals(null) must return false.
A recipe for a high-quality equals method is as such:
Use the == operator to check for references to this object.
Use the instanceof operator to check if the argument has the correct type
Cast to the correct type.
Check all field types and corresponding field types.
Finally, when done, ask yourself - is this method symmetric, transitive and consistent?
Caveats
Always override hashcode when you override equals
Don't be too clever!
Don't substitute another type for Object in the equals declaration.
Contact
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
15 min
February 29, 2016030: Material Design for developers with GDE Mike Wolfson
In this episode we talk to Material Design Master and Google Developer Expert Mike Wolfson. What does Material design mean to us developers? How does one use the numerous support libraries to help with this? What widgets should and shouldn't we be using? Listen to the show and find out.
Show Notes
Material Design - Official site
Material Design - The Specification
Google Color Palette - list of "approved" colors
Google Color Palette Library - picking colors from an image
Android Support Lib 23.2 video [twitter.com]
Resource for getting better at Material Design:
Materialdoc.com - curated blog post for developers
Android Historian - Mike's Material Design demo
PSD resources - Up Labs [materialup.com]
Official PSD layout templates
Official Material Design Icons
DroidconNYC 2015: Material design everywhere using the Android Support Libraries - Mike's talk
Sponsors
Rollbar - special offer: Bootstrap plan free for 90 days [rollbar.com/fragmented]
Contact
Mike Wolfson: Twitter Google+ mikewolfson.com
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
44 min
February 22, 2016029: All about the infamous 65,536 dex method count
If you've been an Android developer in the last 2 years, you must have seen this dreaded exception: dex: method ID not in [0, 0xffff]: 65536
Quick googling would immediately bring up the phrase "65K method count" and the recommended solution "multi-dexing". But if you want to really understand this mysterious number and the reason behind its existence, listen on!
Show Notes
Official Dalvik specification [source.android.com] (look for invoke- prefix methods)
Android and the Dex limit (great post)
ADB Ep 11 : ART, pART 2 (Trash Talk) (discussion on ART)
MultiDexing [developer.android.com] (solution to your 65K method count woes)
Contact
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
9 min
February 15, 2016028: Tips & Tricks for Android developers
Feast yourselves to a grand bonanza of tips and tricks with this episode! Donn and Kaushik talk about the tips and tricks they've picked up over the course of 2015.
Android Dev Summit demo - Structural replace [youtube.com]
Software Design patterns [wikipedia.org]
Reformatting code:
Reformatting Source code [jetbrains.com]
Reformat dialog [jetbrains.com] (only VCS changed text)
Library dependency management:
JitPack (publishing jvm and android libraries)
Internal library dependency managment - Kelly Shushter
Hadi Hariri on Fragmented Ep 20 talking Intellij shortcuts
Using UiAutomatorViewer to help write espresso tests - Ep. 23: Caster.io [caster.io]
git pre-commit hook [gist]
Intellij - work with embedded Terminal [jetbrains.com] (yes, you can customize btw zsh/bash)
KG's Update script - morning ritual [gist]
Cyril on Grid Spacing on Android [cyrilmottier.com] (showdividers/divider)
Tor's issue on maven vs jcenter [code.google.com]
Contact
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
39 min
February 05, 2016027: Talking Realm with Christian Melchior
Realm pro and overall genius Christian Melchior joins us in this episode to talk about all things Realm.
Show Notes
Realm.io for Java/Android
Martin fowler on schema-less
github issue on extending Realm Object
Caster.io video tutorial - Intro to Realm for Android Devs
Christian's talk at Droidcon NYC 2015 [youtube.com]
Contact
@chrmelchior [twitter.com]
@realm [twitter.com]
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
44 min
January 21, 2016026: LetMeExplainYou AndroidDev like a pro
In this episode Donn and Kaushik chat with the one and only Israel Ferrer Camacho (@rallat). They discuss a talk Israel gave sometime back on "Android development like a pro", exchanging war stories on patterns like MVP, MVVP clean architecture etc.
Show Notes
Rallat's slides [pdf]
Rallat's sample repo using different patterns [github]
Burrito Design Pattern [twitter.com]
Working Effectively with Legacy Code [amazon.com]
The Clean architecture [blog.8thlight.com]
Uncle Bob's talk on Vimeo
Awesome Picks:
Rallat:
Rallat's tweet on Dagger 2 & Scope Provider
Music for the week! The Weeknd
Cmd Shift A - one shortcut to rule them all
Donn:
Philly ETE (April 11/12) (Donn's giving a talk)
Life is Short [paulgraham.com]
7 videos on UI Testing and TDD with Espresso : Caster.IO
Kaushik:
Create a pared-down "lite" version of the app
Pancakes library - alternative to Fragment Manager for views
Contact
@rallat [twitter.com]
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
42 min
December 28, 2015025: Effective Java for Android developers : Item 7
In this mini Fragment, we introduce Joshua's seventh Item and a momentous end to the first chapter: Avoid finalizers
Stay tuned for more items from our "Effective Java for Android developers" Fragment series.
Show Notes
Effective Java (2nd Edition) - Joshua Bloch
Avoid finalizers
If you don't know what they are, ignorance is bliss. If you know what they are, avoid them!
Finalizers in Java != destructors in C++ (C++ counterparts to constructors).
In C++ destructors
you reclaim resources here (Java has GC)
you also reclaim non-memory resources (use the try-finally block in Java)
(unpredicatable amt of time between object becoming unreachable and finalizer being executed) Never do anything time critical in finalizer!
System.gc + System.runFinalization increase chances - no guarantee
System.runFinalizersOnExit + Runtime.runFinalizersOnExit are the ones that do - but they are fatally flawed
Java 7 has try with resources, which is also interesting and auto-closeables. [Android] devs can only dream of these.
If an uncaught exception is thrown in a finalizer, it is ignored, and the finalization abruptly terminates.
Severe performance penalty for using finalizers - (one e.g.) time to create and destroy simple object goes from 5.6ns -> 2400ns
Only valid use: as a safety net or to terminate noncritical native resources.
[Android] you're probably better off using Android's lifecycle methods.
Contact
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
12 min
December 15, 2015024: Effective Java for Android developers : Item 6
Joshua's sixth Item: Eliminate obsolete object references , in a distinctively croaky voice.
Stay tuned for more items from our "Effective Java for Android developers" Fragment series.
Show Notes
Effective Java (2nd Edition) - Joshua Bloch
Eliminate obsolete object references
Supplemental reading (for the diligent ones that follow shownotes)
Do click listeners leak memory? [stackoverflow.com]
Square's LeakCanary
How to leak a context - Handlers and inner classes [androiddesignpatterns.com]
Avoiding Memory leaks [android-developers.blogspot.com]
Contact:
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
13 min
November 30, 2015023: Android Dev Summit Recap
Donn and Kaushik cover the happenings of Google's very first Android Developer conference - "Android Dev Summit". Together, they attended the conference both virtually and physically! Listen on for the highlights.
Android Dev Summit Schedule
AndroidDev Twitter account
Sessions
Android Dev Summit 2015 Keynote [youtube]
Android Studio for Experts [youtube]
Android Testing [youtube]
Firechat - Framework team [youtube]
Firechat - Android Tools and Testing team [youtube]
Sample projects
Android Topeka [github]
Android Bootstrap [github]
u2020 [github]
Google code labs + github link
Contact us:
@fragmentedcast [twitter.com]
@donnfelker [twitter.com]
@kaushikgopal [twitter.com]
36 min