Step-by-Step: Android Secure Screen Without Plugin - Restrict screen short and screen recording

 1. Modify Android Code (MainActivity.java or MainActivity.kt)

If using Kotlin (MainActivity.kt):

import android.os.Bundle

import io.flutter.embedding.android.FlutterActivity

import io.flutter.embedding.engine.FlutterEngine

import io.flutter.plugin.common.MethodChannel

import android.view.WindowManager

class MainActivity: FlutterActivity() {

    private val CHANNEL = "secure_screen_channel"

    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {

        super.configureFlutterEngine(flutterEngine)

        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler {

            call, result ->

            if (call.method == "enableSecureScreen") {

                window.setFlags(

                    WindowManager.LayoutParams.FLAG_SECURE,

                    WindowManager.LayoutParams.FLAG_SECURE

                )

                result.success(null)

            } else if (call.method == "disableSecureScreen") {

                window.clearFlags(WindowManager.LayoutParams.FLAG_SECURE)

                result.success(null)

            } else {

                result.notImplemented()

            }

        }

    }

}

2. Flutter Side (Dart)

Create a helper class or call directly:

import 'package:flutter/services.dart';

class SecureScreen {

  static const _channel = MethodChannel('secure_screen_channel');

  static Future<void> enable() async {

    await _channel.invokeMethod('enableSecureScreen');

  }

  static Future<void> disable() async {

    await _channel.invokeMethod('disableSecureScreen');

  }

}

Then in your widget or screen:

@override

void initState() {

  super.initState();

  SecureScreen.enable();

}

@override

void dispose() {

  SecureScreen.disable();

  super.dispose();

}