Android Automotive OS is getting extra recognition as automotive corporations want 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 overview to concentrate on what to anticipate. Let’s strive making a easy Hiya 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 may get any from api32, Android 9, or Android 10, however I don’t advocate the latest one as it is extremely laggy and crashes loads proper now. There are additionally Volvo and Polestar pictures.
For these it is advisable 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 Venture and select automotive with no exercise
A pleasant and clear venture ought to be created, with none lessons: Go to construct.gradle and add the automotive app library into dependencies, refresh the venture to make it get
our new dependency:
implementation "androidx.automotive.app:app-automotive:1.2.0-rc01"
Let’s write some code, first our display class. Title it as you need and make it prolong Display screen class from android.automotive.app package deal and make it implement required strategies:
public class GrapeAppScreen extends Display screen
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 properly make it implement the required strategies. From createHostValidator() technique 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() technique:
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 screen onCreateScreen(@Nullable Intent intent)
return new GrapeAppScreen(getCarContext());
;
Subsequent, transfer to AndroidManifest and add varied options inside the principle manifest tag:
<uses-feature
android:identify="android.{hardware}.sort.automotive"
android:required="true" />
<uses-feature
android:identify="android.software program.automotive.templates_host"
android:required="true" />
<uses-feature
android:identify="android.{hardware}.wifi"
android:required="false" />
<uses-feature
android:identify="android.{hardware}.display.portrait"
android:required="false" />
<uses-feature
android:identify="android.{hardware}.display.panorama"
android:required="false" />
Contained in the Utility tag add our service and exercise, don’t neglect minCarApiLevel as lack of this may 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="@model/Theme.GrapeApplication">
<meta-data android:identify="androidx.automotive.app.minCarApiLevel"
android:worth="1"
/>
<service
android:identify="com.grapeup.grapeapplication.GrapeAppService"
android:exported="true">
<intent-filter>
<motion android:identify="androidx.automotive.app.CarAppService" />
</intent-filter>
</service>
<exercise
android:identify="androidx.automotive.app.exercise.CarAppActivity"
android:exported="true"
android:label="GrapeApp Starter"
android:launchMode="singleTask"
android:theme="@android:model/Theme.DeviceDefault.NoActionBar">
<intent-filter>
<motion android:identify="android.intent.motion.MAIN" />
<class android:identify="android.intent.class.LAUNCHER" />
</intent-filter>
<meta-data
android:identify="distractionOptimized"
android:worth="true" />
</exercise>
</software>
Now we will add our software to the system, 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 system, it could require you to get to the play retailer and get it.
That’s the way it seems:
The very last thing, we’ll add a navigation button that can pop a Toast. Modify onGetTemplate() in Display screen class, add Motion and ActionStrip:
Motion motion = new Motion.Builder()
.setOnClickListener(
() -> CarToast.makeText(getCarContext(), "Hiya!", 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 could have 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 want to have(and a little bit of configuration). Test the Automotive app library to discover extra of what will be executed with it, mess around with creating your app, and positively verify our weblog quickly for extra AAOS app creation content material.
