Can I reduce to 0 seconds the PreviewScreen(White) time at the start?

Question

There's a white-blank screen in android, just before the launch screen, at the start of the Application, that white-blank screen it's about 2 seconds in devices like Samsung j1 with android 5.1. That 2 seconds it's due to the app performance or the Android and hardware performance, that 2 seconds can be reduced?.

We make up the problem using the following in our app theme: <item name="android:windowDisablePreview">true</item>, that means that the white screen now it's transparent, so it seems to be an Android problem from the user perspective, but it's a way to reduce the time of this preview screen to a half or near zero?

Reference to this problem in:

1. https://developer.android.com/topic/performance/vitals/launch-time
2. Android - Disable dummy starting window of application
3. https://stackoverflow.com/questions/40905317/how-can-i-remove-white-screen-which-appear-before-splash-screenhttps://stackoverflow.com/questions/37437037/android-prevent-white-screen-at-startup
4. https://www.tothenew.com/blog/disabling-the-preview-or-start-window-in-android/
5. blank screen comes before splash

Answer 1

Have a look at the startup guidelines and performance measurement techniques here:

https://developer.android.com/topic/performance/vitals/launch-time

This will tell you where the time is being spent during startup and give you suggestions on how to improve that.

Also, you can provide a splash screen that shows instead of the white screen. See details here:

https://android.jlelse.eu/the-complete-android-splash-screen-guide-c7db82bce565