Async Storage can only store string data. In order to store object data, you need to serialize it first. For data that can be serialized to JSON, you can use JSON.stringify() when saving the data and JSON.parse() when loading the data.
import AsyncStorage from '@react-native-async-storage/async-storage';
setItem() is used both to add new data item (when no data for given key exists), and to modify existing item (when previous data for given key exists).
const storeData = async (value) => {
try {
await AsyncStorage.setItem('my-key', value);
} catch (e) {
}
};
const storeData = async (value) => {
try {
const jsonValue = JSON.stringify(value);
await AsyncStorage.setItem('my-key', jsonValue);
} catch (e) {
}
};
getItem returns a promise that either resolves to stored value when data is found for given key, or returns null otherwise.
const getData = async () => {
try {
const value = await AsyncStorage.getItem('my-key');
if (value !== null) {
}
} catch (e) {
}
};
const getData = async () => {
try {
const jsonValue = await AsyncStorage.getItem('my-key');
return jsonValue != null ? JSON.parse(jsonValue) : null;
} catch (e) {
}
};
For more examples, head over to API section.
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