物联网应用使用户能够在车内对连接的设备执行相关操作。例如,控制某些设备的状态,如打开车库门、翻转家庭电灯开关或启用家庭安全系统。
在清单中声明类别支持
您的应用需要在其 CarAppService
的意图过滤器中声明 androidx.car.app.category.IOT
汽车应用类别。
<application>
...
<service
...
android:name=".MyCarAppService"
android:exported="true">
<intent-filter>
<action android:name="androidx.car.app.CarAppService" />
<category android:name="androidx.car.app.category.IOT"/>
</intent-filter>
</service>
...
<application>
实现应用的功能
要实现您的应用,请参阅使用汽车版 Android 应用库了解如何构建 Car App Library 应用。此外,请务必熟悉物联网应用的汽车应用质量指南,因为您的应用将根据这些指南进行审核。
对于物联网应用,GridTemplate
是显示设备列表并允许用户与它们交互的绝佳选择,如下面的示例所示
Kotlin
val listBuilder = ItemList.Builder() listBuilder.addItem( GridItem.Builder() .setTitle("Garage door") .setImage(...) // Handle user interactions .setOnClickListener {...} .build() ) listBuilder.addItem( GridItem.Builder() .setTitle("Garage lights") // Show a loading indicator until the status of the device is known // (call invalidate() when the status is known to refresh the screen) .setLoading(true) .build() ) return GridTemplate.Builder() .setTitle("Devices") .setHeaderAction(Action.APP_ICON) .setSingleList(listBuilder.build()) .build()
Java
ItemList.Builder listBuilder = new ItemList.Builder(); listBuilder.addItem( new GridItem.Builder() .setTitle("Garage door") .setImage(...) // Handle user interactions .setOnClickListener(() -> {...}) .build() ); listBuilder.addItem( new GridItem.Builder() .setTitle("Garage lights") // Show a loading indicator until the status of the device is known // (call invalidate() when the status is known to refresh the screen) .setLoading(true) .build() ); return new GridTemplate.Builder() .setTitle("Devices") .setHeaderAction(Action.APP_ICON) .setSingleList(listBuilder.build()) .build();