1. We design and develop great
software for mobile and web.

2. Google I/O 2015 report:
Milkshakes,
Marshmallows and
Marblecakes

3. M

4. Permissions:
• Requested on first use of a feature
• Users can control individual permissions on a per
app basis
• Won’t influence legacy apps (unless compiled
against M)
• Developers will have to handle more and more
cases

5. Fingerprint API:
• Allows users to authenticate actions
• Simple usage with Authentication Callback
• Device credentials can be used
to authenticate, creating a more fluid UX
• Samples:
https://github.com/googlesamples/android-
ConfirmCredential
https://github.com/googlesamples/android-
FingerprintDialog

6. App links:
• Open twitter using twitter, open Facebook using Facebook
• Managed via both backend and app
Android Pay:
• NFC based payment system
• Any NFC enabled phone can use it
• Fingerprint authentication if supported by device
Doze, Now on Tap, Custom Chrome Tabs

7. Tools

8. Android studio:
• Full NDK support
• Vector drawables - generated from SVGs by build
system
• New theme editor and new design editor (in 1.5)
• Play services integration, new SDK manager
• Improved profiling tools

9. Gradle 2.4 and plugin 1.+:
• Performance increase
• Incremental builds and caching
• Jack The Compiler - Java -> Dex
• Better variant/flavour management

10. Design support library
Navigation view:
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header"
app:menu="@menu/drawer_view"/>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="@+id/nav_home"
android:icon="@drawable/ic_dashboard"
android:title="Home" />

11. Design support library
• Uses colorAccent
• Size can be fabSize=“mini"
• Drawable set using src
• Has to have borderWidth set
if you want it to be round :)
Floating Action Button

12. Design support library
• Anchor and anchor gravity
• ScrollFlags - Behaviour of items on scroll
• Scroll interpolators and content scrims
• Behaviors - Defining user interactions with the view
CoordinatorLayout

13. Design support library
• Toast-like view for quick feedback with an action
Snackbar
• Edit texts with labels floating above them. Much wow.
Floating labels
• Tabbed layout that can be both fixed and scrollable. Can be
setUpWithViewpager();
Tab layout
• Work together to create nice looking collapsable toolbars
• Can use parallax and parallax multipliers
• Still buggy
AppBar layout and CollapsingToolbar

14. Data binding
• “Butterknife killer"
• Currently in Beta, coming as a part of AS 1.3
• Write model bindings and simple view logic in layout
XML file
• Views can be even more passive > Cleaner code

15. Data binding<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
<variable name="cheesy" type=“com.support.android.designlibdemo.Cheese"/>
</data>
<android.support.design.widget.CoordinatorLayout POJO Model
Parent layout
<TextView
android:layout_width=“match_parent"
android:layout_height=“wrap_content"
android:text="@{cheesy.text}" />
public class Cheese {
public final String name;
public final String text;
public Cheese(String name, String text) {
this.name = name;
this.text = text;
}
//Replaces setContentView(R.layout.activity_detail); with dynamically generated binding
binding = DataBindingUtil.setContentView(this, R.layout.activity_detail);
Cheese cheesy = new Cheese(cheeseName, getString(R.string.cheese_ipsum));
//We bind our POJO to it
binding.setCheesy(cheesy);
//We can access views without using findViewById
binding.fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Change the model
binding.setCheesy(new Cheese("Got", "Cheddar"));
}
});
Activity:

16. Data binding:
• Most of Java expressions and operators are allowed
• Missing super, this, new
• Automatic null check
• Observables can be used to automatically update UI
on data change
• BaseObservable and @Bindable annotations

17. Samples:
• https://github.com/googlesamples/
• https://github.com/chrisbanes/cheesesquare

18. Thank you!
email: ian.rumac@infinum.hr
twitter: @IanIsSoAwesome