add a Settings button for quick redirection to app settings

app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt

@@ -187,7 +187,7 @@ class EventActivity : SimpleActivity() {
                 if (config.wasAlarmWarningShown) {
                     showReminder1Dialog()
                 } else {
-                    ConfirmationDialog(this, messageId = R.string.reminder_warning, positive = R.string.ok, negative = 0) {
+                    ReminderWarningDialog(this) {
                         config.wasAlarmWarningShown = true
                         showReminder1Dialog()
                     }
@@ -1058,7 +1058,7 @@ class EventActivity : SimpleActivity() {
                 saveEvent()
             }
         } else {
-            ConfirmationDialog(this, messageId = R.string.reminder_warning, positive = R.string.ok, negative = 0) {
+            ReminderWarningDialog(this) {
                 config.wasAlarmWarningShown = true
                 ensureBackgroundThread {
                     saveEvent()

app/src/main/kotlin/com/simplemobiletools/calendar/pro/dialogs/ReminderWarningDialog.kt

@@ -0,0 +1,47 @@
+package com.simplemobiletools.calendar.pro.dialogs
+
+import android.app.Activity
+import android.content.Intent
+import android.net.Uri
+import android.provider.Settings
+import androidx.appcompat.app.AlertDialog
+import com.simplemobiletools.calendar.pro.R
+import com.simplemobiletools.commons.extensions.hideKeyboard
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import com.simplemobiletools.commons.extensions.showErrorToast
+
+class ReminderWarningDialog(val activity: Activity, val callback: () -> Unit) {
+    var dialog: AlertDialog
+
+    init {
+        val view = activity.layoutInflater.inflate(R.layout.dialog_reminder_warning, null)
+
+        dialog = AlertDialog.Builder(activity)
+            .setPositiveButton(R.string.ok) { dialog, which -> dialogConfirmed() }
+            .setNeutralButton(R.string.settings, null)
+            .create().apply {
+                activity.setupDialogStuff(view, this, cancelOnTouchOutside = false)
+                getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener {
+                    redirectToSettings()
+                }
+            }
+    }
+
+    private fun dialogConfirmed() {
+        dialog.dismiss()
+        callback()
+    }
+
+    private fun redirectToSettings() {
+        activity.hideKeyboard()
+        Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+            data = Uri.fromParts("package", activity.packageName, null)
+
+            try {
+                activity.startActivity(this)
+            } catch (e: Exception) {
+                activity.showErrorToast(e)
+            }
+        }
+    }
+}

app/src/main/res/layout/dialog_reminder_warning.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.simplemobiletools.commons.views.MyTextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/reminder_warning"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:lineSpacingExtra="3dp"
+    android:paddingLeft="@dimen/bigger_margin"
+    android:paddingTop="@dimen/bigger_margin"
+    android:paddingRight="@dimen/bigger_margin"
+    android:paddingBottom="@dimen/normal_margin"
+    android:text="@string/reminder_warning"
+    android:textSize="@dimen/bigger_text_size" />