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作为参与过鸿蒙原子化服务落地的开发老鸟,还记得第一个服务上线时,包体从20MB优化到8MB的煎熬。这套轻量化应用形态颠覆了传统APP思路,现在把从踩坑到落地的经验分享出来,帮你少走弯路。
build() {
Column {
Text("天气")
.fontSize(if Device.screenType == .large { 24 } else { 20 })
// 不同设备显示不同内容
if Device.abilityType == .wearable {
Text("精简版数据")
} else {
Text("详细天气数据")
}
}
}
// 计步器后台服务(关键逻辑)
public class StepService extends ServiceAbility {
private StepDetector detector;
@Override
public void onStart(Intent intent) {
detector = new StepDetector(this);
detector.registerListener(count -> {
// 数据变化时通知卡片更新
getAbilityManager().notifyChange(
Uri.parse("dataability://com.pedometer/steps")
);
});
}
}
// 数据权限配置
{
"dataAbility": {
"uriPermissions": [
{
"uri": "dataability://com.weather/data",
"permissions": ["read", "write"]
}
]
}
}
// 卡片式界面(JS UI)
@Entry
@Component
struct Card {
@State data: Weather = { temp: "25℃", status: "晴" }
build() {
Stack {
Image("bg.png").width("100%")
Column {
Text(data.status).fontSize(20)
Text(data.temp).fontSize(36)
}.align(Alignment.Center)
}.onInit(() => {
// 懒加载数据
DataAbility.request("dataability://weather/card")
.then(d => this.data = d)
})
}
}
// 公交站附近触发公交卡片
GeoFenceAPI.addFence(
new GeoFence(
"bus_stop",
new Location(116.4, 39.9),
50, // 50米半径
FenceTrigger.ENTER
),
(status) => {
if (status == FenceStatus.TRIGGERED) {
// 推送公交卡片
CardManager.pushCard(
"bus_card",
"com.transport.bus"
);
}
}
);
// 离家模式联动
DeviceManager.addDeviceStateListener(
DeviceType.SMART_LOCK,
(deviceId, state) => {
if (state == DeviceState.LOCKED) {
// 触发离家服务
AbilityHelper.startAbility(
"com.home.away_mode",
new Intent().putParam("action", "leave")
);
}
}
);
LazyForEach
延迟加载
"weather_card",
new CardConfig().setPriority(1)
--obfuscate
参数编译,代码体积再降15%config.json
中声明,并提供清晰使用说明