perf(startup): splash screen

[alperozturk96]

Changes

1400 ms faster cold start

Before

Screen_recording_20260916_133720.webm

After

Screen_recording_20260916_133829.webm

[alperozturk96]

/backport to stable-35.0.x

[alperozturk96]

100 ms needed so that we can show app icon.

[tobiasKaminsky]

@jancborchardt since you raised the issue :)

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	32	32
Correctness	58	58
Dodgy code	186	186
Experimental	1	1
Malicious code vulnerability	2	2
Multithreaded correctness	26	26
Performance	37	37
Security	18	18
Total	360	360

[github-actions]

📱 QA build

Download	app-qa-debug.apk (134M)
QR code	Open the QR code for this download
Commit	be73f7b
Version	17657
Available until	7 days after this build

The QA build installs alongside a released Nextcloud app, so you can keep
using your existing install while testing.

Downloading the file requires a GitHub account, so open this link on the
device you want to test on, or transfer the APK to it.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 8 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...c/main/java/com/nmc/android/ui/LauncherActivity.kt	50.00%	1 Missing and 7 partials ⚠️

📢 Thoughts on this report? Let us know!

[jancborchardt]

Very nice! Can we get it even faster? :)

[alperozturk96]

Very nice! Can we get it even faster? :)

This is just the beginning. After this PR, I’ll investigate the internal state changes between the loading and loaded states. The splash screen can be faster for the non-branded flow around 1.4 seconds. For the branded flow, it will remain the same so that the custom logo and other branding elements can be displayed. Do you think 1.5 seconds is enough for the branded flow? I would suggest setting it to 300 ms for the branded flow and 100 ms for the non-branded flow.