OneSignal doesn't open my flutter app on click [Android ONLY]

It's a problem from 3.2.0 to 3.2.3

Using 3.0.0 I solved the problem: onesignal_flutter: 3.0.0

To follow the issue: https://github.com/OneSignal/OneSignal-Flutter-SDK/issues/462

Some Fixes Till Onesignal fix it. Ask for the user to enable { display popup window while running in background permission } in other permission of app settings.

Code For Button (Ask user to enable)

if (Platform.isAndroid) {
          try {
            const platformChannel = MethodChannel('getDeviceInfo');
            Map<dynamic, dynamic> result =
                await platformChannel.invokeMethod('getAndroidInfo');
            print(result);
            if(result.isNotEmpty){
              if(result["MANUFACTURER"].toString().toLowerCase() == "xiaomi" &&
                  result["IS_OS_MIUI"]==true){
                const platformChannel = MethodChannel('notiOpen');
                await platformChannel.invokeMethod('startNotiOpen');
              }
            }
          } on PlatformException catch (e) {
            if (kDebugMode) {
              print(e);
            }
          }
        }

#Code in main activity

package com.yourpackagename
import android.content.Intent
import android.content.pm.PackageInfo
import android.os.Build
import android.text.TextUtils
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugin.common.MethodChannel
import java.io.BufferedReader
import java.io.IOException
import java.io.InputStreamReader
import java.util.*

class MainActivity : FlutterActivity() {
    private val CHANNEL = "notiOpen"
    private val CHANNEL2 = "getDeviceInfo"

override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
    super.configureFlutterEngine(flutterEngine)
    MethodChannel(
        flutterEngine.dartExecutor.binaryMessenger,
        CHANNEL
    ).setMethodCallHandler { call, result ->
        if (call.method == "startNotiOpen") {
            notifiOpen()
        } else {
            result.notImplemented()
        }
    }

    MethodChannel(
        flutterEngine.dartExecutor.binaryMessenger,
        CHANNEL2
    ).setMethodCallHandler { call, result ->
        if (call.method == "getAndroidInfo") {
            val deviceInfo = getDeviceInfo()
            if (deviceInfo.isNotEmpty()) {
                result.success(deviceInfo)
            } else {
                result.error("UNAVAILABLE", "Not Recived Device Info", null)
            }
        } else {
            result.notImplemented()
        }
    }
}

private fun getDeviceInfo(): Map<String, Any> {
    var deviceInfo: Map<String, Any> = mapOf()
    try {
        val packageInfo: PackageInfo = applicationContext.getPackageManager()
            .getPackageInfo(applicationContext.getPackageName(), 0)
        deviceInfo = mapOf(
            "MANUFACTURER" to Build.MANUFACTURER,
            "BRAND" to Build.BRAND,
            "MODEL" to Build.MODEL,
            "BOARD" to Build.BOARD,
            "HARDWARE" to Build.HARDWARE,
            "BUILD_CODE" to Build.VERSION.SDK_INT,
            "BUILD_CODE" to BuildConfig.VERSION_CODE,
            "DEVICE" to Build.DEVICE,
            "ID" to Build.ID,
            "VERSION_NAME" to Build.VERSION.RELEASE,
            "TYPE" to Build.TYPE,
            "APP_VERSION" to packageInfo.versionName,
            "APP_BUILD_NUMBER" to packageInfo.longVersionCode,
            "IS_OS_MIUI" to !TextUtils.isEmpty(getSystemProperty("ro.miui.ui.version.name"))
        )
        return deviceInfo
    } catch (e: Exception) {
    }
    return deviceInfo
}

private fun notifiOpen() {
    try {
        val intent = Intent("miui.intent.action.APP_PERM_EDITOR")
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
        val manufacturer = Build.MANUFACTURER
        if ("xiaomi".equals(manufacturer, ignoreCase = true)) {
            intent.setClassName(
                "com.miui.securitycenter",
                "com.miui.permcenter.permissions.PermissionsEditorActivity"
            );
            intent.putExtra("extra_pkgname", "com.yourpackagename")
            startActivity(intent);
        }
    } catch (ignore: java.lang.Exception) {
    } catch (e: Exception) {
    }
    try {
        val intent = Intent("miui.intent.action.APP_PERM_EDITOR")
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
        val manufacturer = Build.MANUFACTURER
        if ("xiaomi".equals(manufacturer, ignoreCase = true)) {
            intent.setClassName(
                "com.miui.securitycenter",
                "com.miui.permcenter.permissions.AppPermissionsEditorActivity"
            )
            intent.putExtra("extra_pkgname", "com.yourpackagename")
            startActivity(intent)
        }
    } catch (ignore: java.lang.Exception) {
    } catch (e: Exception) {
    }
}

fun getSystemProperty(propName: String): String? {
    val line: String
    var input: BufferedReader? = null
    try {
        val p = Runtime.getRuntime().exec("getprop $propName")
        input = BufferedReader(InputStreamReader(p.inputStream), 1024)
        line = input.readLine()
        input.close()
    } catch (ex: IOException) {
        return null
    } finally {
        if (input != null) {
            try {
                input.close()
            } catch (e: IOException) {
                e.printStackTrace()
            }
        }
    }
    return line
}
}

Some source of the code : https://github.com/OneSignal/OneSignal-Flutter-SDK/issues/488 https://gist.github.com/Muyangmin/e8ec1002c930d8df3df46b306d03315d