Feature request: Floating pop-up above other apps for recognition

[RokeJulianLockhart]

Shazam utilises AOSP's overlay API to draw a custom implementation of the standard Bubble API, which, when invoked, initiates recognition.

[jawad117118]

Hi! I’d be happy to work on this feature. @aleksey-saenko does this approach sound okay to you? If so, I can open a PR.

[aleksey-saenko]

@jawad117118 That sounds good. I'll review it once you open the PR.

Some requirements for this feature:

• Implementation must use android.view.WindowManager, requiring only the android.permission.SYSTEM_ALERT_WINDOW permission.
• Preferably use Jetpack Compose instead of XML views (but XML is better than nothing).
• The window must survive configuration changes (screen rotation, etc). The window must be bound to service lifecycle.
• When resizing the window (transition from a button to track info or lyrics), its on-screen position must be preserved. There is a known system bug in Android 13-14 that causes position jumps when simply changing a container's size. To avoid this, you will most likely need to add new views rather than change the content/size of existing containers.
• There must be an ability to drag the floating window down into a special zone at the bottom of the screen to dismiss window.
• The window should use animations for content changes and when moving/snapping to screen edges.
• Avoid using additional third-party libraries.
• Note that purely AI-generated solutions without proper code review, corrections, and testing will not be accepted.

For behavioral reference, consider the floating window in the Shazam app.
It's not necessary to implement everything at once, but please ensure the architecture supports these future enhancements.

[jawad117118]

@aleksey-saenko thanks for your positive response. i'll make sure to incoprorate all of your mentioned concerns. Once I've verified all changes myself then I'll raise the PR.