The best way to Construct Your First App for Android Automotive OS – Grape Up
3 min read
Android Automotive OS is getting extra recognition as automotive corporations need to present their prospects with a extra tailor-made expertise. Right here we share our information to constructing the primary app for AAOS.
Earlier than you begin, learn our first article about AAOS and get to know our evaluation to concentrate on what to anticipate. Let’s strive making a easy Howdy World app for android automotive. To get an IDE, go to Android Studio Preview | Android Developers and get a canary construct:
Within the subsequent step, put together SDK, verify and obtain the Automotive system picture in SDK supervisor. You will get any from api32, Android 9, or Android 10, however I don’t advocate the most recent one as it is vitally laggy and crashes lots proper now. There are additionally Volvo and Polestar photographs.
For these you want to add hyperlinks to SDK Replace Websites:
https://developer.volvocars.com/sdk/volvo-sys-img.xml
https://developer.polestar.com/sdk/polestar2-sys-img.xml
Begin a brand new venture, go to File> New Mission and select automotive with no exercise
A pleasant and clear venture must be created, with none courses: Go to construct.gradle and add the automobile app library into dependencies, refresh the venture to make it get
our new dependency:
implementation "androidx.automobile.app:app-automotive:1.2.0-rc01"
Let’s write some code, first our display class. Identify it as you need and make it prolong Display class from android.automobile.app package deal and make it implement required strategies:
public class GrapeAppScreen extends Display
public GrapeAppScreen(@NonNull CarContext carContext)
tremendous(carContext);
@NonNull
@Override
public Template onGetTemplate()
Row row = new Row.Builder()
.setTitle("Thats our Grape App!").construct();
return new PaneTemplate.Builder(
new Pane.Builder()
.addRow(row)
.construct()
).setHeaderAction(Motion.APP_ICON).construct();
That ought to create a easy display with our icon and title, now create one other class extending CarAppService from the identical package deal and as nicely make it implement the required strategies. From createHostValidator() methodology return a static one that enables all hostnames for the aim of this tutorial and return model new session with our display in onCreateSession(), move CarContext utilizing Session class getCarContext() methodology:
public class GrapeAppService extends CarAppService
public GrapeAppService()
@NonNull
@Override
public HostValidator createHostValidator()
return HostValidator.ALLOW_ALL_HOSTS_VALIDATOR;
@NonNull
@Override
public Session onCreateSession()
return new Session()
@Override
@NonNull
public Display onCreateScreen(@Nullable Intent intent)
return new GrapeAppScreen(getCarContext());
;
Subsequent, transfer to AndroidManifest and add varied options inside the primary manifest tag:
<uses-feature
android:title="android.{hardware}.sort.automotive"
android:required="true" />
<uses-feature
android:title="android.software program.automobile.templates_host"
android:required="true" />
<uses-feature
android:title="android.{hardware}.wifi"
android:required="false" />
<uses-feature
android:title="android.{hardware}.display.portrait"
android:required="false" />
<uses-feature
android:title="android.{hardware}.display.panorama"
android:required="false" />
Contained in the Software tag add our service and exercise, don’t overlook minCarApiLevel as lack of this can throw an exception on app begin:
<software
android:allowBackup="true"
android:appCategory="audio"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@fashion/Theme.GrapeApplication">
<meta-data android:title="androidx.automobile.app.minCarApiLevel"
android:worth="1"
/>
<service
android:title="com.grapeup.grapeapplication.GrapeAppService"
android:exported="true">
<intent-filter>
<motion android:title="androidx.automobile.app.CarAppService" />
</intent-filter>
</service>
<exercise
android:title="androidx.automobile.app.exercise.CarAppActivity"
android:exported="true"
android:label="GrapeApp Starter"
android:launchMode="singleTask"
android:theme="@android:fashion/Theme.DeviceDefault.NoActionBar">
<intent-filter>
<motion android:title="android.intent.motion.MAIN" />
<class android:title="android.intent.class.LAUNCHER" />
</intent-filter>
<meta-data
android:title="distractionOptimized"
android:worth="true" />
</exercise>
</software>
Now we are able to add our software to the gadget, confirm that you’ve got an automotive emulator created, use automotive configuration, and hit run. The app is run in Google Automotive App Host, so if it’s your first software on this gadget, it could require you to get to the play retailer and get it.
That’s the way it appears to be like:
The very last thing, we’ll add a navigation button that can pop a Toast. Modify onGetTemplate() in Display class, add Motion and ActionStrip:
Motion motion = new Motion.Builder()
.setOnClickListener(
() -> CarToast.makeText(getCarContext(), "Howdy!", CarToast.LENGTH_SHORT).present())
.setTitle("Say hello!")
.construct();
ActionStrip actionStrip = new
Add it to PaneTemplate:
return new PaneTemplate.Builder(
new Pane.Builder()
.addRow(row)
.construct()
) .setActionStrip(actionStrip)
.setHeaderAction(Motion.APP_ICON)
.construct();
That’s our HelloWorld app:
Now you’ve got the HelloWorld instance app up and operating utilizing Automotive App Library. It takes care of displaying and arranging every little thing on the display for us. The one duty is so as to add screens and actions we wish to have(and a little bit of configuration). Examine the Automotive app library to discover extra of what could be carried out with it, mess around with creating your app, and positively verify our weblog quickly for extra AAOS app creation content material.
