Flutter Implementation of Proximity Screen Off

When the face is close to the screen, it goes black; when it's farther away, the screen lights up.
Having it while making a call can prevent accidental touches.
Not found
However, I couldn't find any relevant code after searching the entire Flutter organization.
So I plan to do it myself⬇️

Android#

In Android, before API 21, you had to manually write the proximity sensor and screen on/off functions.
After API 21, which is Android 5.0, PowerManager added a new constant

PROXIMITY_SCREEN_OFF_WAKE_LOCK

Making this functionality very simple to implement.

if ((pm.getSupportedWakeLockFlags()
 & PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) != 0x0) {
    mProximityWakeLock = pm.newWakeLock(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, LOG_TAG);
}

iOS#

In iOS, there are also corresponding methods to implement this.

// The implementation of the proximity sensor is encapsulated in UIKit

// Requires testing on a real device

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // The system app automatically enables proximity detection (e.g., during calls, when the face is close to the screen, it goes black; when farther away, the screen lights up)
        // But developer apps need to enable it manually
        UIDevice.current.isProximityMonitoringEnabled = true
        
        // Use notifications to listen for distance changes
        NotificationCenter.default.addObserver(self, selector: #selector(proximityStateChanged), name: NSNotification.Name.UIDeviceProximityStateDidChange, object: nil)
    }
    
    @objc private func proximityStateChanged(){
        if UIDevice.current.proximityState == true{ // Close distance
            print("Too close, it's right on my face")
            // Lock the screen at close distance, making it go black to save power
            UIApplication.shared.isIdleTimerDisabled = false
        } else{ // Far distance
            print("Too far, I can't see you")
            // Do not lock the screen at far distance
            UIApplication.shared.isIdleTimerDisabled = true
        }
    }
}

Both platforms have implementation methods, and we just need to create a Plugin to integrate it into our own project.