Implementing a flutter plugin to wake screen when app is asleep - flutter

Question

I am trying to turn on a screen once an alarm fires. I am using this
[package][1] for the alarm. However, after time doing research I have not come any closer to achieving waking the screen on alarm firing.
The solutions either use deprecated APIs or are only specific to code within some contexts like activities and fragments, which is not the case for a flutter plugin.
Here is what I have tried
-Implementing ActivityAware interface but the onAttachedToActivity() never seems to fire
-Changing activity settings of my main activity in android manifes
android:showWhenLocked="true"
android:turnScreenOn="true"
I am currently trying to get an activity within the plugin to add flags to it to turn the screen on
if (Build.VERSION.SDK_INT < 27)
activity!!.window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON)
else
activity!!.setTurnScreenOn(true)
The problem is the activity variable is always null because for some reason, onAttachedToActivity doesn't run.
I have created an activity within the native code but I don't know how to get a reference to that activity and use it to turn the flags on. Remember, my screen is turned off so this is possibly what is complicating the matter.
Here is where I create the activity:
private fun startMainActivity(context: Context) {
val pm = context.packageManager
val intent = pm.getLaunchIntentForPackage(context.packageName)
context.startActivity(intent)
turnScreenON()
}
How can I create this plugin to wake the screen when an alarm fires?
Here is my code for the android kotlin side:
package com.example.wake_screen
import android.app.Activity
import android.content.Context
import android.os.Build
import android.util.Log
import android.view.WindowManager
import androidx.annotation.NonNull
import io.flutter.embedding.engine.plugins.FlutterPlugin
import io.flutter.embedding.engine.plugins.activity.ActivityAware
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugin.common.MethodChannel.Result
/** WakeScreenPlugin */
class WakeScreenPlugin: ActivityAware, FlutterPlugin, MethodCallHandler{
private lateinit var channel : MethodChannel
private lateinit var mContext: Context
private var activity: Activity? = null
override fun onAttachedToEngine(#NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
channel = MethodChannel(flutterPluginBinding.binaryMessenger, "wake_screen")
channel.setMethodCallHandler(this)
mContext = flutterPluginBinding.applicationContext
}
override fun onAttachedToActivity(binding: ActivityPluginBinding) {
activity = binding.activity
Log.d("We are attached",binding.lifecycle.toString())
}
override fun onDetachedFromActivity() {
//release resources
}
override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
activity = binding.activity
}
override fun onDetachedFromActivityForConfigChanges() {
//release resources
}
override fun onMethodCall(#NonNull call: MethodCall, #NonNull result: Result) {
if (call.method == "getPlatformVersion") {
startMainActivity(mContext)
result.success("Android ${android.os.Build.VERSION.RELEASE}")
}
else {
result.notImplemented()
}
}
private fun turnScreenON(){
if (Build.VERSION.SDK_INT < 27)
activity!!.window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON)
else
activity!!.setTurnScreenOn(true)
}
private fun startMainActivity(context: Context) {
val pm = context.packageManager
val intent = pm.getLaunchIntentForPackage(context.packageName)
context.startActivity(intent)
turnScreenON()
}
override fun onDetachedFromEngine(#NonNull binding: FlutterPlugin.FlutterPluginBinding) {
channel.setMethodCallHandler(null)
}
}
Here's my code on the flutter side:
//Provide instruction to wake device after duration
void setAlarm() async {
await AndroidAlarmManager.oneShot(
const Duration(seconds: _duration),
0,
wakeTheScreen,
wakeup: true,
allowWhileIdle: true,
);
}
//Function invoking platform code
static Future<void> wakeTheScreen() async {
String? version = await WakeScreen().getPlatformVersion();
print(version);
}
In summary, How do I wake the screen up using a flutter plugin that needs an activity to work
[1]: https://pub.dev/packages/android_alarm_manager_plus