Ever wondered how apps like Truecaller display an interactive popup on top of your phone’s call screen — even when the device is locked?📞🕵️
In this article, we’ll explore how to build a custom popup window that appears over the incoming call screen using Kotlin 💡.
You’ll learn how to handle permissions ✅, manage overlays 🖼️, and use Android’s CallScreeningService to detect calls — all while keeping your popup interactive and draggable.🛠️✨
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