[work] — Incallui

If you’ve ever built a VoIP or carrier-grade calling app for Android, you’ve likely cursed the black box known as . It’s the system-level interface that pops up when you receive or make a phone call—the screen with the accept, decline, speakerphone, and keypad buttons.

One of the most common bugs in custom ROMs and OEM skins is the "Black Screen of Death"—the screen stays black when a call comes in, or you can't hang up. incallui