Скачать или смотреть How to Customize Fade In Duration in Android Kotlin Activities

Learn how to adjust the `fade in` duration when starting an activity in Android using Kotlin. Follow our step-by-step guide and improve your app's transition effects!
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This video is based on the question https://stackoverflow.com/q/64252973/ asked by the user 'TheGreatCornholio' ( https://stackoverflow.com/u/10642456/ ) and on the answer https://stackoverflow.com/a/64253031/ provided by the user 'ianhanniballake' ( https://stackoverflow.com/u/1676363/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Changing Fade In Duration When Starting an Activity in Android Kotlin

Transition animations enhance the user experience in mobile applications, providing smooth and visually appealing interactions. One common animation is the fade in transition, which creates an engaging effect when moving from one activity to another. However, you may encounter issues when trying to customize the duration of this transition. In this guide, we will address a common question: How do you change the fade in duration when starting an activity in Android using Kotlin?

The Problem: Default Fade In Duration

You may have a custom fade_in.xml defined in your project’s res > anim folder, designed to specify an animation duration like so:

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

Here, you've set the android:duration attribute to 100 milliseconds for your fade_in animation. When you start your activity with the following code:

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

You might notice that the fade transition does not respect the custom duration you specified in your animation file. Instead, it uses a default duration that does not change based on your custom settings.

The Solution: Use Your Custom Animation Resource

The reason you're encountering this issue is simple: you are actually using the system's built-in fade_in animation (android.R.anim.fade_in) instead of your custom animation. To resolve this and use your defined fade_in.xml, you should remove the android. prefix from the overridePendingTransition method call. Here's how to correctly implement it:

Step-by-Step Implementation

Define Custom Animation: Make sure you have created your fade_in.xml in the res > anim directory, as shown earlier.

Start Your Activity: When you begin your activity, ensure that you utilize your animation resources without the prefix:

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

Test the Transition: Run your application and verify that the fade transition now reflects the duration value specified in your custom animation file.

Conclusion

Customizing the transition effects of your Android activities can significantly enhance the user experience. By ensuring that you're using your animation resources rather than default system animations, you can maintain full control over the aesthetics of your app. Now, with this straightforward technique, you can successfully change the fade in duration when starting an activity in Android using Kotlin.

If you're looking to further enhance animations in your application, consider exploring other animation techniques and resources available in the Android development environment.

Feel free to leave comments below if you have any questions or if you have your own tips for creating amazing transitions!