We need an Activity to display the dialog

vector/src/main/java/im/vector/app/core/pushers/UnifiedPushHelper.kt

@@ -19,6 +19,7 @@ package im.vector.app.core.pushers
 import android.content.Context
 import android.content.pm.PackageManager
 import androidx.core.content.edit
+import androidx.fragment.app.FragmentActivity
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.squareup.moshi.JsonClass
 import im.vector.app.BuildConfig
@@ -91,18 +92,24 @@ class UnifiedPushHelper @Inject constructor(
         }
     }
 
-    fun register(onDoneRunnable: Runnable? = null) {
+    fun register(
+            activity: FragmentActivity,
+            onDoneRunnable: Runnable? = null,
+    ) {
         gRegister(
+                activity,
                 onDoneRunnable = onDoneRunnable
         )
     }
 
     fun reRegister(
+            activity: FragmentActivity,
             pushersManager: PushersManager,
             vectorPreferences: VectorPreferences,
             onDoneRunnable: Runnable? = null
     ) {
         gRegister(
+                activity,
                 force = true,
                 pushersManager = pushersManager,
                 vectorPreferences = vectorPreferences,
@@ -111,6 +118,7 @@ class UnifiedPushHelper @Inject constructor(
     }
 
     private fun gRegister(
+            activity: FragmentActivity,
             force: Boolean = false,
             pushersManager: PushersManager? = null,
             vectorPreferences: VectorPreferences? = null,
@@ -163,7 +171,7 @@ class UnifiedPushHelper @Inject constructor(
                 }
             }.toTypedArray()
 
-            MaterialAlertDialogBuilder(context)
+            MaterialAlertDialogBuilder(activity)
                     .setTitle(stringProvider.getString(R.string.unifiedpush_getdistributors_dialog_title))
                     .setItems(distributorsNameArray) { _, which ->
                         val distributor = distributorsArray[which]

vector/src/main/java/im/vector/app/features/home/HomeActivity.kt

@@ -189,7 +189,7 @@ class HomeActivity :
         super.onCreate(savedInstanceState)
         analyticsScreenName = MobileScreen.ScreenName.Home
         supportFragmentManager.registerFragmentLifecycleCallbacks(fragmentLifecycleCallbacks, false)
-        unifiedPushHelper.register {
+        unifiedPushHelper.register(this) {
             if (unifiedPushHelper.isEmbeddedDistributor()) {
                 FcmHelper.ensureFcmTokenIsRetrieved(
                         this,

vector/src/main/java/im/vector/app/features/settings/notifications/VectorSettingsNotificationPreferenceFragment.kt

@@ -100,7 +100,7 @@ class VectorSettingsNotificationPreferenceFragment @Inject constructor(
         findPreference<SwitchPreference>(VectorPreferences.SETTINGS_ENABLE_THIS_DEVICE_PREFERENCE_KEY)?.let {
             it.setTransactionalSwitchChangeListener(lifecycleScope) { isChecked ->
                 if (isChecked) {
-                    unifiedPushHelper.register()
+                    unifiedPushHelper.register(requireActivity())
                 } else {
                     unifiedPushHelper.unregister(
                             pushersManager,
@@ -153,6 +153,7 @@ class VectorSettingsNotificationPreferenceFragment @Inject constructor(
             if (BuildConfig.ALLOW_EXTERNAL_UNIFIEDPUSH_DISTRIB) {
                 it.onPreferenceClickListener = Preference.OnPreferenceClickListener {
                     unifiedPushHelper.reRegister(
+                            requireActivity(),
                             pushersManager,
                             vectorPreferences
                     ) {

vector/src/main/java/im/vector/app/features/settings/troubleshoot/TestEndpointAsTokenRegistration.kt

@@ -61,6 +61,7 @@ class TestEndpointAsTokenRegistration @Inject constructor(
             quickFix = object : TroubleshootQuickFix(R.string.settings_troubleshoot_test_endpoint_registration_quick_fix) {
                 override fun doFix() {
                     unifiedPushHelper.reRegister(
+                            context,
                             pushersManager,
                             vectorPreferences
                     )