system_alert_window_example
A flutter plugin to show Truecaller like overlay window, over all other apps along with callback events.
Android
Permissions
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE " />
<uses-permission android:name="android.permission.WAKE_LOCK" />
Android 9 and below
Uses 'draw on top' permission and displays it as a overlay window
Android 10 and above
Uses Android Bubble APIs to show the overlay window.
IOS
Displays as a notification in the notification center [Help Needed]