James Williams - Demystifying Constraint Layout - Codemotion Milan 2017

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ConstraintLayout has had the reputation of being very powerful but difficult to learn. Too many times have I talked to developers who were reluctant to use it in their designs because it was "too magical" and they couldn't understand what it was doing. Despite the learning curve, ConstraintLayout allows you to make your designs more responsive and ultimately make your UI code faster to render. It also includes some design features that allow you to more accurately implement your designer's work. In this session, you'll learn how to make sense of the features of ConstraintLayout.

INTRODUCTION
I work at Udacity. I'm Curriculum Lead for Android.
2

OUR NANODEGREE PROGRAMS
Android Basics and Android
Also Data Analyst, Machine Learning, Web Dev, iOS
http://go.udacity.com/android
3

MATERIAL DESIGN FOR ANDROID
DEVELOPERS
https://www.udacity.com/course/material-design-for-
android-developers--ud862
4

AGENDA
A Quick Guide to Rendering
Pitfalls of Some Layout ViewGroups
Constraint Layout
More Awesomeness You Can Do With It
5

THE ANDROID VIEW CYCLE
Measure Pass
Layout Pass
Drawing the Things
6

ONMEASURE(WIDTHMEASURESPEC,
HEIGHTMEASURESPEC)
8

MEASURESPEC MODES
EXACTLY
AT MOST
UNSPECIFIED
10

OKAY I'LL USE RELATIVELAYOUT
INSTEAD OF NESTED
LINEARLAYOUT
16

CONSTRAINTLAYOUT IS A SUPPORT
LIBRARY
19

SUPPORTED BACK TO API 9
(GINGERBREAD)
20

THE NEW LAYOUT EDITOR
Design View
Blueprint View
22

UNDERSTANDING THE NEW
ATTRIBUTES VIEW
36

DESIGNERS
DESIGNERS sometimes design things that are:
hard to represent in the target platform
diﬀicult to understand in static drawinds
50

DEVELOPERS
DEVELOPERS o en optimize for terseness
and will silently drop parts of the design they don't
understand
51

STRATEGIES TO CONVERT MOCKS TO A
REAL UI
54

USE ANDROID.WIDGET.VIEW ELEMENTS
AS PLACEHOLDERS
57

ENTER VIRTUAL HELPER
OBJECTS
Guidelines
Barriers
Groups
58

GROUPS
<android.support.constraint.Group
              android:id="@+id/group"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:visibility="visible"
              app:constraint_referenced_ids="button4,button9" />
64

<Button android:id="@+id/buttonA" ... />
  <Button android:id="@+id/buttonB" ...
      app:layout_constraintCircle="@+id/buttonA"
      app:layout_constraintCircleRadius="100dp"
      app:layout_constraintCircleAngle="45" />
70

RECAP
Double Taxation is bad
Use Constraint Layout for nearly ALL THE THINGS
71

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James Birnie - Using Many Worlds of Compute Power with Quantum - Codemotion A...

Codemotion

Quantum computers can use all of the possible pathways generated by quantum decisions to solve problems that will forever remain intractable to classical compute power. As the mega players vie for quantum supremacy and Rigetti announces its $1M "quantum advantage" prize, we live in exciting times. IBM-Q and Microsoft Q# are two ways you can learn to program quantum computers so that you're ready when the quantum revolution comes. I'll demonstrate some quantum solutions to problems that will forever be out of reach of classical, including organic chemistry and large number factorisation.

Don Goodman-Wilson - Chinese food, motor scooters, and open source developmen...

Codemotion

Chinese food exploded across America in the early 20th century, rapidly adapting to local tastes while also spreading like wildfire. How was it able to spread so fast? The GY6 is a family of scooter engines that has achieved near total ubiquity in Europe. It is reliable and cheap to manufacture, and it's made in factories across China. How are these factories able to remain afloat? Chinese-American food and the GY6 are both riveting studies in product-market fit, and both are the product of a distributed open source-like development model. What lessons can we learn for open source software?

Pieter Omvlee - The story behind Sketch - Codemotion Amsterdam 2019

Codemotion

Dave Farley - Taking Back “Software Engineering” - Codemotion Amsterdam 2019

Codemotion

Would you fly in a plane designed by a craftsman or would you prefer your aircraft to be designed by engineers? We are learning that science and empiricism works in software development, maybe now is the time to redefine what “Software Engineering” really means. Software isn't bridge-building, it is not car or aircraft development either, but then neither is Chemical Engineering. Engineering is different in different disciplines. Maybe it is time for us to begin thinking about retrieving the term "Software Engineering" maybe it is time to define what our "Engineering" discipline should be.

Joshua Hoffman - Should the CTO be Coding? - Codemotion Amsterdam 2019

Codemotion

What is the job of a CTO and how does it change as a startup grows in size and scale? As a CTO, where should you spend your focus? As an engineer aspiring to be a CTO, what skills should you pursue? In this inspiring and personal talk, I describe my journey from early Red Hat engineer to CTO at Bloomon. I will share my view on what it means to be a CTO, and ultimately answer the question: Should the CTO be coding?

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