Dark Mode

To implement a dark mode, you can use React Native’s built-in Appearance API.

Implementing Dark Mode

1. Detect User’s Color Scheme:

Use the Appearance API to detect whether the user prefers a light or dark theme.

javascriptCopy codeimport { Appearance } from 'react-native';

const colorScheme = Appearance.getColorScheme();
const [theme, setTheme] = useState(colorScheme === 'dark' ? 'dark' : 'light');

2. Toggle Theme:

Add a toggle button in the settings to switch themes.

javascriptCopy codeconst toggleTheme = () => {
  setTheme(prevTheme => (prevTheme === 'light' ? 'dark' : 'light'));
};

3. Apply Styles Conditionally:

Use the theme state to apply different styles throughout your app.

javascriptCopy codeconst styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: theme === 'dark' ? '#333' : '#fff',
    color: theme === 'dark' ? '#fff' : '#000',
  },
});

Step 2: Task Prioritization

Allow users to assign priority levels (e.g., high, medium, low) to their items.

Implementing Task Prioritization

1. Define Priority Levels:

Create an array of priority options.

javascriptCopy codeconst priorities = ['High', 'Medium', 'Low'];
const [selectedPriority, setSelectedPriority] = useState(priorities[0]);

2. Add a Picker for Priority:

Include a picker when adding or editing items.

javascriptCopy code<Picker
  selectedValue={selectedPriority}
  onValueChange={(itemValue) => setSelectedPriority(itemValue)}
>
  {priorities.map(priority => (
    <Picker.Item key={priority} label={priority} value={priority} />
  ))}
</Picker>

3. Update Item Object:

Include the priority level in the item object when adding or editing.

javascriptCopy codeconst newItem = { text: textInput, completed: false, priority: selectedPriority };

4. Sort by Priority:

Allow users to sort their items by priority.

javascriptCopy codeconst sortedItems = items.sort((a, b) => {
  const priorityOrder = { 'High': 1, 'Medium': 2, 'Low': 3 };
  return priorityOrder[a.priority] - priorityOrder[b.priority];
});

Step 3: Custom Notifications

Let users customize notification settings, such as sound and frequency.

Implementing Custom Notifications

1. Add Notification Preferences:

Create a settings screen where users can select notification sounds and frequency.

javascriptCopy codeconst [notificationSound, setNotificationSound] = useState('default');
const [notificationFrequency, setNotificationFrequency] = useState('daily');

2. Save Preferences:

Use AsyncStorage to save user preferences for notifications.

javascriptCopy codeconst saveNotificationPreferences = async () => {
  await AsyncStorage.setItem('notificationSound', notificationSound);
  await AsyncStorage.setItem('notificationFrequency', notificationFrequency);
};

3. Use Preferences in Scheduling Notifications:

When scheduling notifications, use the user’s preferences to customize them.

Step 4: Data Backup and Restore

Implement features for users to back up their data and restore it when needed.

Implementing Data Backup and Restore

1. Backup Functionality:

Allow users to download their data in a file (JSON format).

javascriptCopy codeconst backupData = async () => {
  const dataToBackup = JSON.stringify(items);
  await FileSystem.writeAsStringAsync(FileSystem.documentDirectory + 'backup.json', dataToBackup);
};

2. Restore Functionality:

Allow users to upload their backup file and restore it.

javascriptCopy codeconst restoreData = async (fileUri) => {
  const data = await FileSystem.readAsStringAsync(fileUri);
  const restoredItems = JSON.parse(data);
  setItems(restoredItems);
};

Step 5: Voice Input

Allow users to add items via voice input using a speech recognition library.

Implementing Voice Input

1. Install a Voice Recognition Library:

Use a library like react-native-voice.

bashCopy codenpm install --save react-native-voice

2. Setup Voice Recognition:

Set up the library and add functions to start and stop listening.

javascriptCopy codeimport Voice from 'react-native-voice';

const startListening = async () => {
  try {
    await Voice.start('en-US');
  } catch (e) {
    console.error(e);
  }
};

const onSpeechResults = (event) => {
  setTextInput(event.value[0]); // Use the recognized text
};

Voice.onSpeechResults = onSpeechResults;

3. Add a Button to Start Voice Input:

Include a button in your UI to trigger voice recognition.

javascriptCopy code<Button title="Voice Input" onPress={startListening} />