Solving fitToSuppliedMarkers Issues in React Native Maps for Android

Discover how to resolve the issue where `fitToSuppliedMarkers` doesn't work in React Native Maps on Android, ensuring all markers are visible on your map.
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This video is based on the question https://stackoverflow.com/q/74155438/ asked by the user 'bydyas' ( https://stackoverflow.com/u/15389660/ ) and on the answer https://stackoverflow.com/a/74163630/ provided by the user 'bydyas' ( https://stackoverflow.com/u/15389660/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Issue: fitToSuppliedMarkers Not Working on Android

If you're developing a mobile application using React Native and have integrated maps, you may have encountered an issue with the fitToSuppliedMarkers function not working as expected on Android devices. Specifically, have you struggled to get your map to automatically zoom out and display all markers without manually adjusting the zoom level? You're not alone in this!

This problem can be frustrating, especially when you're trying to provide a seamless user experience. In this guide, we'll explore the issue thoroughly and provide a solution that can save you time and effort during development.

The Problem

In a typical scenario where you have two markers—an origin and a destination—on your map, the goal is to have the map automatically adjust to display both markers. Here's an example of how one might attempt to implement this:

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Despite the intended functionality, you might find that the markers are displayed, but the map does not zoom out effectively to show both points without your intervention. This leads to confusion and potential user dissatisfaction.

The Solution: Using an Older Version of react-native-maps

After investigating the issue, the solution turns out to be fairly straightforward—using an older version of the react-native-maps library, specifically version @ 0.31.1. This version has proven to resolve the issue with the fitToSuppliedMarkers functionality on Android, ensuring all markers are visible as expected.

Step-by-Step Guide to Implement the Solution

Check Your Package.json: Open your package.json file and verify which version of react-native-maps you are currently using.

Install the Correct Version: Use npm or yarn to install version @ 0.31.1 of react-native-maps:

[[See Video to Reveal this Text or Code Snippet]]

or

[[See Video to Reveal this Text or Code Snippet]]

Update Your Code: Ensure your code utilizes the fitToSuppliedMarkers function as shown previously.

Test Your Application: Run your application on Android to confirm that the map now automatically adjusts to display both markers correctly without any manual zooming.

Conclusion

In summary, if you're experiencing issues with fitToSuppliedMarkers not functioning on Android while working with React Native Maps, simply reverting to version @ 0.31.1 of the react-native-maps library can resolve this problem. This solution not only simplifies your development process but also enhances the user experience in your application.

By applying this fix, you can ensure that your map behaves as expected, displaying all the necessary markers, thus saving time and enhancing usability. Happy coding!

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