How to add a time countdown that looks like the default Android clock app in AOD mode by react-native?

How to Add a Time Countdown that Looks Like the Default Android Clock App in AOD Mode by React Native

If you are developing a React Native application and want to add a time countdown that resembles the default Android clock app in Always-On Display (AOD) mode, you’ve come to the right place. In this blog post, we will explore two different solutions to achieve this functionality.

Solution 1: Using the react-native-countdown-circle-timer library

The first solution involves using the react-native-countdown-circle-timer library. This library provides a customizable countdown timer component that can be easily integrated into your React Native project.

To get started, install the library by running the following command:

npm install react-native-countdown-circle-timer

Once installed, you can use the CountdownCircleTimer component to create a time countdown. Here’s an example:

{`import React from 'react';
import { View } from 'react-native';
import { CountdownCircleTimer } from 'react-native-countdown-circle-timer';

const TimeCountdown = () => {
  return (
    
       {
          // Handle countdown completion
        }}
      >
        {({ remainingTime }) => (
          {remainingTime}
        )}
      
    
  );
};

export default TimeCountdown;`}

In the above code snippet, we import the necessary components from the library and create a TimeCountdown component. The CountdownCircleTimer component is wrapped inside a View to center it on the screen. We set the isPlaying prop to true to start the countdown, and the duration prop to 60 to set the countdown duration to 60 seconds.

The colors prop allows you to customize the colors of the countdown circle. You can specify an array of color values and their corresponding durations. In the example above, we use three colors with durations of 0.4 and 1 (the last color has no duration specified).

The onComplete prop allows you to handle the countdown completion event. You can perform any necessary actions when the countdown reaches zero.

The countdown itself is rendered using the {({ remainingTime }) => (...)} function, where remainingTime represents the remaining time in seconds. In the example above, we simply display the remaining time using a Text component.

Solution 2: Creating a custom countdown component

If you prefer a more custom approach, you can create your own countdown component using React Native’s built-in components and APIs. Here’s an example implementation:

{`import React, { useEffect, useState } from 'react';
import { View, Text } from 'react-native';

const TimeCountdown = () => {
  const [remainingTime, setRemainingTime] = useState(60);

  useEffect(() => {
    const interval = setInterval(() => {
      setRemainingTime((prevTime) => prevTime - 1);
    }, 1000);

    return () => {
      clearInterval(interval);
    };
  }, []);

  return (
    
      {remainingTime}
    
  );
};

export default TimeCountdown;`}

In this solution, we create a TimeCountdown component that uses the useState and useEffect hooks to manage the countdown state and update it every second.

The initial value of the countdown is set to 60 seconds using the useState hook. Inside the useEffect hook, we set up an interval that decreases the remaining time by 1 every second. When the component is unmounted, we clean up the interval using the clearInterval function.

The countdown is rendered using a Text component, which displays the remainingTime state value.

Conclusion

Adding a time countdown that resembles the default Android clock app in AOD mode is achievable in React Native. In this blog post, we explored two different solutions to achieve this functionality. You can choose between using the react-native-countdown-circle-timer library or creating a custom countdown component using React Native’s built-in components and APIs.

Feel free to experiment with these solutions and customize them according to your specific requirements. Happy coding!