Incallui — Android

By [Your Name]

It appears every time you make or receive a call. It displays the contact name, the duration, the mute button, and the dreaded red "end" icon. But behind those familiar touch targets lies one of the most complex, security-sensitive, and historically problematic modules in the Android Open Source Project (AOSP): . android incallui

| Component | Function | | :--- | :--- | | | System service managing all calls (including VoIP like WhatsApp). | | InCallService API | A binder interface allowing any dialer app to draw the call screen. | | InCallUI (AOSP) | The default Google implementation. | | Carrier/OEM Overlays | Samsung’s One UI, Xiaomi’s MIUI, or Google Pixel’s skin on top. | By [Your Name] It appears every time you