Software Development

Methods to Construct Your First App for Android Automotive OS – Grape Up

By / January 25, 2023

Android Automotive OS is getting extra recognition as automotive firms wish 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 assessment to pay attention to what to anticipate. Let’s attempt 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:

AAOS Hello World: How to Build Your First App for Android Automotive OS

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 most recent one as it is rather laggy and crashes rather a lot proper now. There are additionally Volvo and Polestar photographs.

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 undertaking, go to File> New Challenge and select automotive with no exercise

Android Automotive OS

A pleasant and clear undertaking needs to be created, with none courses: Go to construct.gradle and add the automobile app library into dependencies, refresh the undertaking to make it get

AAOS Hello World

our new dependency:

implementation "androidx.automobile.app:app-automotive:1.2.0-rc01"

Let’s write some code, first our display screen class. Identify it as you need and make it prolong Display screen class from android.automobile.app bundle 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 screen with our icon and title, now create one other class extending CarAppService from the identical bundle 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 screen in onCreateSession(), cross 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 primary manifest tag:

<uses-feature
   android:identify="android.{hardware}.sort.automotive"
   android:required="true" />
<uses-feature
   android:identify="android.software program.automobile.templates_host"
   android:required="true" />
<uses-feature
   android:identify="android.{hardware}.wifi"
   android:required="false" />
<uses-feature
   android:identify="android.{hardware}.display screen.portrait"
   android:required="false" />
<uses-feature
   android:identify="android.{hardware}.display screen.panorama"
   android:required="false" />

Contained in the Utility tag add our service and exercise, don’t overlook minCarApiLevel as lack of it will throw an exception on app begin:

<utility
   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.automobile.app.minCarApiLevel"
   android:worth="1"
/>

   <service
       android:identify="com.grapeup.grapeapplication.GrapeAppService"
       android:exported="true">
       <intent-filter>
           <motion android:identify="androidx.automobile.app.CarAppService" />
       </intent-filter>
   </service>

   <exercise
       android:identify="androidx.automobile.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>
</utility>

Now we are able to add our utility to the gadget, confirm that you’ve 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 utility on this gadget, it might require you to get to the play retailer and get it.

That’s the way it seems:

Build Your First App for Android Automotive OS

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 Automobile App Library. It takes care of displaying and arranging all the things on the display screen for us. The one accountability is so as to add screens and actions we wish to have(and a little bit of configuration). Test the Automobile app library to discover extra of what will be carried out with it, mess around with creating your app, and undoubtedly verify our weblog quickly for extra AAOS app creation content material.

Android Automotive OS

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