Request POST_NOTIFICATIONS at runtime so foreground service notification shows on Android 13+

Author: utsapoddar

work_timer/android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.VIBRATE"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"/>
     <application

work_timer/android/app/src/main/kotlin/com/utsapoddar/sift/MainActivity.kt

@@ -1,11 +1,15 @@
 package com.utsapoddar.sift
 
+import android.Manifest
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
+import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
@@ -34,6 +38,12 @@ class MainActivity : FlutterActivity() {
         ch.setMethodCallHandler { call, result ->
             when (call.method) {
                 "startTimerService" -> {
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU &&
+                        ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)
+                            != PackageManager.PERMISSION_GRANTED) {
+                        ActivityCompat.requestPermissions(
+                            this, arrayOf(Manifest.permission.POST_NOTIFICATIONS), 1001)
+                    }
                     val intent = Intent(this, TimerService::class.java)
                     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                         startForegroundService(intent)