am using the animations package in flutter for default animations but by using open container method from a listView item to a screen the animations are not smooth without any errors.
please help me guys.
Are you running the app in the iOS Simulator or Android Emulador? The Simulator/Emulator performance is not representative of real devices, so you should always test the app's performance on an actual device.
If not, are you running the app in debug mode? Debug mode is not optimized, and often the animations will be janky. Instead, try running your app on an actual device and in release mode (flutter run --release).
Related
I use a custom PNG for the splash screen in my MAUI app. It works fine on all of the IOS emulators I run the app on. It works fine on the Android emulator it runs on. However, when I connect my physical Android device to my computer and deploy to it, the splash screen does not appear.
I've tried looking at the device log, but there are literally thousands of entries in there which make it problematic for troubleshooting. What are the recommended debugging or diagnostic steps I can realistically use to track this down?
EDIT:
I managed to grab the device log entries during the splash screen loading and thought I would paste them here to see if anyone can make any more sense of what's going on. Here's a color coded version of it that I formatted in Excel:
I don't have any code and I haven't started my project yet but I couldn't find anything on the internet about this.
Can you detect scrolling outside the a flutter app by allowing it to run in the background?
Recently, I have used flutters navigation.It works good but it lags even on my physical device. I was thinking to change it to pageview but than I have second thoughts so I decided to use its navigation.How can I make smooth navigation?.
You were probably using the debug mode on your device. Connect your device and run the command flutter run --releaseto deploy the app in release mode to your device, it shouldn't lag like that - if it does you might have some work running on your UI thread in an awkward way.
It's not recommended to use pageview for the entire app navigation as those views will be kept in memory.
To check the fps or the performance of your flutter app, run your app in profile mode instead of release mode. You will be able to see the rendering time of your frames in profile mode. For more info, visit https://flutter.dev/docs/testing/ui-performance.
Why buildTransition on screen navigation even Hero animation is never smooth at first run?
How to make a prefect smooth animation always?
Kind Regards
You need to build with --release or --profile. If you run from IDE you'll get a --debug build by default, which is unsuitable to measure any performance metrics or animations or build output size.
flutter run --profile
More details in https://flutter.io/docs/testing/ui-performance
This is a known issue in flutter where you have to "warm-up" the graphic api (SkSL) first. After a third run, usually it will become smooth.
The problem happens in both iOS an Android.
For iSO, the lag usually occurs in metal api as Apple has recently dropped support for OpenGL which is usually where the Skia graphic engine is implemented.
Work around and temporary solution are found on this page.
Extreme jank on iOS/Android the first time any kind of animation or transition runs (release build) - skia shader compilation #61450
Update
Flutter has updated their official docs on this issue
Reduce shader compilation jank on mobile
I am running a Sencha Touch application and I am wondering what the best way to measure my FPS while running my app on a device from Xcode? Specifically I have an infinitely scrolling facebook-like wall and I am trying to measure my scrolling performance.
You can use instruments for this! Tap and hold the play button in Xcode and press 'profile' and it will open the instruments app. Use the Core Animation Template. It'll show you FPS to test your scroll performance.
You can also use this tool for measuring FPS on both iOS and Android devices, simultaneously and you dont even need a mac (PC/linux would do!)
https://www.gamebench.net/en/content/gamebench-desktop-profiler
You can use the native CADisplayLink to count frames as they are rendered on the screen. FPSCounter does that.