Dive into secure and efficient coding practices with our curated list of the top 10 examples showcasing 'expo-task-manager' in functional components in JavaScript. Our advanced machine learning engine meticulously scans each line of code, cross-referencing millions of open source libraries to ensure your implementation is not just functional, but also robust and secure. Elevate your React applications to new heights by mastering the art of handling side effects, API calls, and asynchronous operations with confidence and precision.
);
}
}
async function getSavedLocations() {
try {
const item = await AsyncStorage.getItem(STORAGE_KEY);
return item ? JSON.parse(item) : [];
} catch (e) {
return [];
}
}
TaskManager.defineTask(LOCATION_UPDATES_TASK, async ({ data: { locations } }: any) => {
if (locations && locations.length > 0) {
const savedLocations = await getSavedLocations();
const newLocations = locations.map(({ coords }: any) => ({
latitude: coords.latitude,
longitude: coords.longitude,
}));
// tslint:disable-next-line no-console
console.log(`Received new locations at ${new Date()}:`, locations);
savedLocations.push(...newLocations);
await AsyncStorage.setItem(STORAGE_KEY, JSON.stringify(savedLocations));
locationEventsEmitter.emit('update', savedLocations);
}
});
/>
<button title="Center">
);
}
}
async function getSavedRegions(): Promise {
const tasks = await TaskManager.getRegisteredTasksAsync();
const task = tasks.find(({ taskName }) => taskName === GEOFENCING_TASK);
return task ? task.options.regions : [];
}
TaskManager.defineTask(GEOFENCING_TASK, async ({ data: { region } }: { data: any }) => {
const stateString = Location.GeofencingRegionState[region.state].toLowerCase();
// tslint:disable-next-line no-console
console.log(`${stateString} region ${region.identifier}`);
await Notifications.presentLocalNotificationAsync({
title: 'Expo Geofencing',
body: `You're ${stateString} a region ${region.identifier}`,
data: region,
});
});
const styles = StyleSheet.create({
screen: {
flex: 1,
},</button>
);
}
}
async function getSavedLocations() {
try {
const item = await AsyncStorage.getItem(STORAGE_KEY);
return item ? JSON.parse(item) : [];
} catch (e) {
return [];
}
}
if (Platform.OS !== 'android') {
TaskManager.defineTask(LOCATION_UPDATES_TASK, async ({ data: { locations } }) => {
if (locations && locations.length > 0) {
const savedLocations = await getSavedLocations();
const newLocations = locations.map(({ coords }) => ({
latitude: coords.latitude,
longitude: coords.longitude,
}));
savedLocations.push(...newLocations);
await AsyncStorage.setItem(STORAGE_KEY, JSON.stringify(savedLocations));
locationEventsEmitter.emit('update', savedLocations);
}
});
}
const styles = StyleSheet.create({
};
const loadAssets = () => {
const images = [
require('../assets/Notify.png'),
require('../assets/Help_Others.png'),
require('../assets/Security.png')
];
images.map(image => Asset.fromModule(image).downloadAsync());
};
if (!fontsLoaded) return ;
return ;
};
TaskManager.defineTask(LOCATION_TASK, ({ data, error }: any) => {
if (error) console.log(error);
if (data) {
const { locations } = data;
const {
coords: { longitude, latitude }
} = locations[0] as { coords: EmergencyCoordinates };
setInterval(() => {
Emergencies.managePushNotifications({ longitude, latitude });
}, 10000);
}
});
export default Root;
<button title="{">
);
}
}
TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => {
const now = Date.now();
console.log(`Got background fetch call at date: ${new Date(now).toISOString()}`);
await AsyncStorage.setItem(LAST_FETCH_DATE_KEY, now.toString());
return BackgroundFetch.Result.NewData;
});
const styles = StyleSheet.create({
screen: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
},
button: {
padding: 10,</button>
);
}
}
async function getSavedRegions() {
const tasks = await TaskManager.getRegisteredTasksAsync();
const task = tasks.find(({ taskName }) => taskName === GEOFENCING_TASK);
return task ? task.options.regions : [];
}
if (Platform.OS !== 'android') {
TaskManager.defineTask(GEOFENCING_TASK, async ({ data: { region } }) => {
const stateString = Location.GeofencingRegionState[region.state].toLowerCase();
const body = `You're ${stateString} a region with latitude: ${region.latitude}, longitude: ${region.longitude} and radius: ${region.radius}m`;
await Notifications.presentLocalNotificationAsync({
title: 'Expo Geofencing',
body,
data: {
...region,
notificationBody: body,
notificationType: GEOFENCING_TASK,
},
});
});
}
Notifications.addListener(({ data, remote }) => {
export async function registerTaskAsync(taskName: string, options: BackgroundFetchOptions = {}): Promise {
if (!ExpoBackgroundFetch.registerTaskAsync) {
throw new UnavailabilityError('BackgroundFetch', 'registerTaskAsync')
}
if (!TaskManager.isTaskDefined(taskName)) {
throw new Error(
`Task '${taskName}' is not defined. You must define a task using TaskManager.defineTask before registering.`
);
}
await ExpoBackgroundFetch.registerTaskAsync(taskName, options);
}
export async function registerTaskAsync(taskName, options = {}) {
if (!ExpoBackgroundFetch.registerTaskAsync) {
throw new UnavailabilityError('BackgroundFetch', 'registerTaskAsync');
}
if (!TaskManager.isTaskDefined(taskName)) {
throw new Error(`Task '${taskName}' is not defined. You must define a task using TaskManager.defineTask before registering.`);
}
await ExpoBackgroundFetch.registerTaskAsync(taskName, options);
}
export async function unregisterTaskAsync(taskName) {
export async function registerTaskAsync(taskName: string, options: BackgroundFetchOptions = {}): Promise {
if (!ExpoBackgroundFetch.registerTaskAsync) {
throw new UnavailabilityError('BackgroundFetch', 'registerTaskAsync')
}
if (!TaskManager.isTaskDefined(taskName)) {
throw new Error(
`Task '${taskName}' is not defined. You must define a task using TaskManager.defineTask before registering.`
);
}
await ExpoBackgroundFetch.registerTaskAsync(taskName, options);
}
export async function registerTaskAsync(taskName, options = {}) {
if (!ExpoBackgroundFetch.registerTaskAsync) {
throw new UnavailabilityError('BackgroundFetch', 'registerTaskAsync');
}
if (!TaskManager.isTaskDefined(taskName)) {
throw new Error(`Task '${taskName}' is not defined. You must define a task using TaskManager.defineTask before registering.`);
}
await ExpoBackgroundFetch.registerTaskAsync(taskName, options);
}
export async function unregisterTaskAsync(taskName) {