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Learn how to manage view visibility in your Flutter app by ensuring the screen scrolls to a focused TextField when the keyboard opens. Simple steps included!
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How to Scroll the Screen When TextField Gets Focus While Keyboard Is Open

In a Flutter application, creating a user-friendly interface is crucial, especially when dealing with forms. One common issue developers face is ensuring that a TextField remains visible when the user taps on it and the keyboard pops up. This can be problematic if other input fields or content are obstructed by the keyboard, making it difficult for users to see what they’re typing.

In this guide, we’ll explore how to solve this problem effectively by automatically scrolling the screen to the focused TextField when it receives input focus.

The Problem Explained

When a user interacts with a TextField in Flutter, the on-screen keyboard will emerge, often covering the TextField and nearby elements. This can lead to a frustrating user experience, as individuals may not be able to see the text they are entering.

Why This Happens

Screen Real Estate: The keyboard occupies a significant amount of screen space, especially in smaller devices.

Usability: Users expect that when they tap on an input field, they can see what they are typing without obstruction.

Form Navigation: In a form with multiple input fields, ensuring visibility when transitioning between fields is essential.

The Solution

To ensure that the TextField is always visible when it is focused, we can utilize the Scrollable.ensureVisible method in Flutter. This method allows smooth scrolling to the desired widget when it receives focus. Below, we will break down the implementation steps.

Implementation Steps

Create a Stateful Widget: Set up a new Stateful Widget to manage the state of two TextFields.

Use Global Keys: Assign GlobalKeys to the TextFields, allowing us to access their context when they receive focus.

Implement Scroll Functionality: Use the onTap callback of the TextFields to call a function that ensures visibility.

Example Code

Here's a simple Flutter implementation based on the aforementioned steps:

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

Breakdown of the Code

GlobalKey: Each TextField is given a unique GlobalKey to identify it within the widget tree.

SingleChildScrollView: The main body is scrollable, allowing it to accommodate longer content.

Scrolling Logic: When a user taps on a TextField, ensureVisibleOnTextArea is called, which performs the scrolling action using Scrollable.ensureVisible.

Optional Functionality

If the initial scroll doesn't seem to work as expected, you can introduce a second scrolling attempt after a slight delay, which may allow for better results.

Conclusion

By implementing this scrolling behavior, you can greatly enhance the user experience in your Flutter applications, ensuring that users can always see the input they are providing. Following the outlined steps and utilizing the provided code, you can ensure your forms are user-friendly and functional.

If you have any questions or need further clarification, feel free to reach out in the comments below!