Android Gesture-Based Zoom Feature

I need reliable, fluid zoom functionality added to my existing Android app. Users must be able to pinch-to-zoom on touchscreens, and—when they run the same build in an emulator or on a Chromebook—zoom with the mouse wheel or the Ctrl + / Ctrl – shortcuts... (Budget: $15 - $25 USD, Jobs: Android, Android App Development, Android Studio, API, Java, Kotlin, Mobile App Development, Mobile Development)