mfurtak

The New Android SDK Build System

adt-dev@googlegroups.com

http://b.android.com

Why a new system?

• More extensible, customizable, more stable API
• Unify the build for the IDE and CI servers

mfurtak

What's New in Android Developer Tools

Android Studio

• Based on IntelliJ IDEA

IntelliJ Experience

• Can warn you when you might be passing an incorrect variable based on a comparison of the variable name and the method name
• Find action popup allows you to search for actions you can do by searching by their name

mfurtak

Google+ Sign-In for Android Developers

OTA Installs

• During sign-in, Play offers the user to install your app on their device, if they have a compatible device.
  • The user will also automatically be signed in on that device
• Integrated with Play Services, so is already on many devices
• Does all the OAuth2 token management for you

Using API

mfurtak

Android Graphics Performance

Reordering and Merging

• Trying to more automatically reorder graphics commands you give so that they're done in an optimal order
• Also merging individual draw commands into groups of like commands for efficiency
• All automatic, and potentitally available in the future

Multithreading in the Renderer

mfurtak

App Navigation

Lateral Navigation

• Switching between sibling elements
• Action bar can do this through tabs, or spinners
  • "Implementing Effective Navigation"
  • Action Bar compatibility for 2.1+ * No need to rush off ABS, but for new apps, go for ActionBarCompat
• View Pager

mfurtak

Agile UX Research in Android

• The goal is to provide the most value in the shortest amount of time.
• We can have the quickest turn around by looking for insights into what people do
• A-B Testing struggles to tell you why people do what they do

RITE - Rapid Iterative Testing and Evaluation (1-2 days)

• Commonly used for continuous design iteration
• Scheduled 5 users for 1 hour blocks with 1 hour in between each

mfurtak

A Moving Experience

Elements of Good Animations

• Keep them short, but appropriate to the action that is happening
  • (defaults to 300ms on Android for property animator)
• Keep them smooth
  • Don't run layout during animation! Do it first.
  • Use the right timing curve
• Keep them natural

mfurtak

config defaultToCurrentScreen true
config nudgePercentOf screenSize
config resizePercentOf screenSize
config secondsBetweenRepeat 0.1
config checkDefaultsOnLoad true
config focusCheckWidthMax 3000
config windowHintsShowIcons true
config windowHintsIgnoreHiddenWindows false
config windowHintsSpread true
# config keyboardLayout dvorak

mfurtak

config defaultToCurrentScreen true
config nudgePercentOf screenSize
config resizePercentOf screenSize
config secondsBetweenRepeat 0.1
config checkDefaultsOnLoad true
config focusCheckWidthMax 3000
config windowHintsShowIcons true
config windowHintsIgnoreHiddenWindows false
config windowHintsSpread true
# config keyboardLayout dvorak

mfurtak

FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to instantiate application com.speek.SpeekApplication: java.lang.NullPointerException
  at android.app.LoadedApk.makeApplication(LoadedApk.java:501)
	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4124)
	at android.app.ActivityThread.access$1300(ActivityThread.java:130)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1255)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:137)
	at android.app.ActivityThread.main(ActivityThread.java:4745)
	at java.lang.reflect.Method.invokeNative(Native Method)