I'm getting the time one time. sometimes I didn't get that too. I need the background time. once if I started the fetching background button it should give the time in the console until I stop the fetch background. I used expo background fetch and task manager to fetch the background time . I'm facing a problem it fetching time continuously so please help me with this coding. documentation is in expo documentation.
import * as BackgroundFetch from 'expo-background-fetch';
import * as TaskManager from 'expo-task-manager';
const BACKGROUND_FETCH_TASK = 'background-fetch1';
const now = Date.now();
console.log(`Got background fetch call at**** date: ${new Date(now).toISOString()}`);
// Be sure to return the successful result type!
return BackgroundFetch.Result.NewData;
});
async function registerBackgroundFetchAsync() {
const now = Date.now();
console.log(`Registered**** date: ${new Date(now).toISOString()}`);
console.log(" registered ");
return BackgroundFetch.registerTaskAsync(BACKGROUND_FETCH_TASK, {
minimumInterval: 60 * 15, // 30 sec
stopOnTerminate: false, // android only,
startOnBoot: true, // android only
});
}
async function unregisterBackgroundFetchAsync() {
console.log("un registered ");
const now = Date.now();
console.log(`Un registered fetch call at**** date: ${new Date(now).toISOString()}`);
return BackgroundFetch.unregisterTaskAsync(BACKGROUND_FETCH_TASK);
}
const TrackScreen = ({ navigation }) => {
const { state, clearError, fetchContactsforTrack } = useContext(TrackContext);
const [isRegistered, setIsRegistered] = useState(false);
const [status, setStatus] =useState(BackgroundFetch.Status);
// Clear error if any
useEffect(() => {
checkStatusAsync();
const unsubscribe = navigation.addListener('focus', () => {
clearError();
});
return unsubscribe;
}, [navigation, clearError]);
/* Stop the backgroud tracking */
const stopTracking=()=>{
}
/* Stop the backgroud tracking */
const startTracking=(track)=>{
var trackdata= fetchContactsforTrack(track)
}
const checkStatusAsync = async () => {
const status = await BackgroundFetch.getStatusAsync();
const isRegistered = await TaskManager.isTaskRegisteredAsync(BACKGROUND_FETCH_TASK);
const now = Date.now();
console.log(`Checking statuscall at**** date: ${new Date(now).toISOString()}`);
console.log("-------------"+status);
console.log("-------------"+isRegistered);
console.log("-------------"+JSON.stringify(BackgroundFetch));
setStatus(status);
setIsRegistered(isRegistered);
};
const toggleFetchTask = async () => {
if (isRegistered) {
await unregisterBackgroundFetchAsync();
} else {
await registerBackgroundFetchAsync();
await BackgroundFetch.setMinimumIntervalAsync(.5);
}
checkStatusAsync();
};
return (
<View >
<View >
<Text>
Background fetch status:{' '}
<Text >{status ? BackgroundFetch.Status[status] : null}</Text>
</Text>
<Text>
Background fetch task name:{' '}
<Text >
{isRegistered ? BACKGROUND_FETCH_TASK : 'Not registered yet!'}
</Text>
</Text>
</View>
<View ></View>
<Button
title={isRegistered ? 'Unregister BackgroundFetch task' : 'Register BackgroundFetch task'}
onPress={toggleFetchTask}
/>
</View>
);
this is my code
