Added a note about not configured peers. Changed all dialog buttons to greenish color.

app/src/main/java/eu/neilalexander/yggdrasil/DnsActivity.kt

@@ -57,7 +57,7 @@ class DnsActivity : AppCompatActivity() {
         addServerButton.setOnClickListener {
             val view = inflater.inflate(R.layout.dialog_add_dns_server, null)
             val input = view.findViewById<TextInputEditText>(R.id.addDnsInput)
-            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
             builder.setTitle(getString(R.string.dns_add_server_dialog_title))
             builder.setView(view)
             builder.setPositiveButton(getString(R.string.add)) { _, _ ->
@@ -128,7 +128,7 @@ class DnsActivity : AppCompatActivity() {
                     view.findViewById<ImageButton>(R.id.deletePeerButton).tag = i
 
                     view.findViewById<ImageButton>(R.id.deletePeerButton).setOnClickListener { button ->
-                        val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+                        val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
                         builder.setTitle(getString(R.string.dns_remove_title, server))
                         builder.setPositiveButton(getString(R.string.remove)) { dialog, _ ->
                             servers.removeAt(button.tag as Int)
@@ -176,7 +176,7 @@ class DnsActivity : AppCompatActivity() {
                 }
             }
             view.setOnLongClickListener {
-                val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+                val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
                 builder.setTitle(getString(R.string.dns_server_info_dialog_title))
                 builder.setMessage("${infoPair.first}\n\n${infoPair.second}")
                 builder.setPositiveButton(getString(R.string.ok)) { dialog, _ ->

app/src/main/java/eu/neilalexander/yggdrasil/GlobalApplication.kt

@@ -11,6 +11,7 @@ import androidx.core.app.NotificationCompat
 import androidx.preference.PreferenceManager
 
 const val PREF_KEY_ENABLED = "enabled"
+const val PREF_KEY_PEERS_NOTE = "peers_note"
 const val MAIN_CHANNEL_ID = "Yggdrasil Service"
 
 class GlobalApplication: Application(), YggStateReceiver.StateReceiver {

app/src/main/java/eu/neilalexander/yggdrasil/MainActivity.kt

@@ -1,10 +1,12 @@
 package eu.neilalexander.yggdrasil
 
 import android.app.Activity
+import android.app.AlertDialog
 import android.content.*
 import android.graphics.Color
 import android.net.VpnService
 import android.os.Bundle
+import android.view.ContextThemeWrapper
 import android.widget.Switch
 import android.widget.TextView
 import android.widget.Toast
@@ -161,6 +163,7 @@ class MainActivity : AppCompatActivity() {
                         }
                     }
                     enabledLabel.text = if (intent.getBooleanExtra("started", false)) {
+                        showPeersNoteIfNeeded(peerState.length())
                         if (count == 0) {
                             enabledLabel.setTextColor(Color.RED)
                             getString(R.string.main_no_connectivity)
@@ -188,4 +191,26 @@ class MainActivity : AppCompatActivity() {
             }
         }
     }
+
+    private fun showPeersNoteIfNeeded(peerCount: Int) {
+        if (peerCount > 0) return
+        val preferences = PreferenceManager.getDefaultSharedPreferences(this@MainActivity.baseContext)
+        if (!preferences.getBoolean(PREF_KEY_PEERS_NOTE, false)) {
+            this@MainActivity.runOnUiThread {
+                val builder: AlertDialog.Builder =
+                    AlertDialog.Builder(ContextThemeWrapper(this@MainActivity, R.style.YggdrasilDialogs))
+                builder.setTitle(getString(R.string.main_add_some_peers_title))
+                builder.setMessage(getString(R.string.main_add_some_peers_message))
+                builder.setPositiveButton(getString(R.string.ok)) { dialog, _ ->
+                    dialog.dismiss()
+                }
+                builder.show()
+            }
+            // Mark this note as shown
+            preferences.edit().apply {
+                putBoolean(PREF_KEY_PEERS_NOTE, true)
+                commit()
+            }
+        }
+    }
 }

app/src/main/java/eu/neilalexander/yggdrasil/PeersActivity.kt

@@ -99,7 +99,7 @@ class PeersActivity : AppCompatActivity() {
         addPeerButton.setOnClickListener {
             val view = inflater.inflate(R.layout.dialog_addpeer, null)
             val input = view.findViewById<TextInputEditText>(R.id.addPeerInput)
-            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
             builder.setTitle(getString(R.string.peers_add_peer))
             builder.setView(view)
             builder.setPositiveButton(getString(R.string.peers_add)) { dialog, _ ->
@@ -153,7 +153,7 @@ class PeersActivity : AppCompatActivity() {
                     view.findViewById<ImageButton>(R.id.deletePeerButton).tag = i
 
                     view.findViewById<ImageButton>(R.id.deletePeerButton).setOnClickListener { button ->
-                        val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+                        val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
                         builder.setTitle(getString(R.string.peers_remove_title, peer))
                         builder.setPositiveButton(getString(R.string.peers_remove)) { dialog, _ ->
                             config.updateJSON { json ->

app/src/main/java/eu/neilalexander/yggdrasil/SettingsActivity.kt

@@ -70,7 +70,7 @@ class SettingsActivity : AppCompatActivity() {
 
         resetConfigurationRow.setOnClickListener {
             val view = inflater.inflate(R.layout.dialog_resetconfig, null)
-            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
             builder.setTitle(getString(R.string.settings_warning_title))
             builder.setView(view)
             builder.setPositiveButton(getString(R.string.settings_reset)) { dialog, _ ->
@@ -92,7 +92,7 @@ class SettingsActivity : AppCompatActivity() {
 
         findViewById<View>(R.id.setKeysRow).setOnClickListener {
             val view = inflater.inflate(R.layout.dialog_set_keys, null)
-            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.YggdrasilDialogs))
             val privateKey = view.findViewById<EditText>(R.id.private_key)
             builder.setTitle(getString(R.string.set_keys))
             builder.setView(view)

app/src/main/res/values-ru/strings.xml

@@ -29,6 +29,8 @@
     <string name="main_no_peers">Нет пиров</string>
     <string name="main_one_peer">1 пир</string>
     <string name="main_many_peers">%d пира/пиров</string>
+    <string name="main_add_some_peers_title">Внимание</string>
+    <string name="main_add_some_peers_message">Кажется, вы не добавили ни одного пира. Зайдите в раздел пиров и подключите один из списка публичных, чтобы подключиться к сети.</string>
     <string name="peers_add_peer">Добавить пира в конфиг</string>
     <string name="peers_add">Добавить</string>
     <string name="peers_remove_title">Убрать %s?</string>

app/src/main/res/values/colors.xml

@@ -5,6 +5,7 @@
     <color name="purple_700">#FF3700B3</color>
     <color name="teal_200">#FF03DAC5</color>
     <color name="teal_700">#FF018786</color>
+    <color name="green">#5FBF9F</color>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
     <color name="hintlight">#F2F1F5</color>

app/src/main/res/values/strings.xml

@@ -29,6 +29,8 @@
     <string name="main_no_peers">No peers</string>
     <string name="main_one_peer">1 peer</string>
     <string name="main_many_peers">%d peers</string>
+    <string name="main_add_some_peers_title">Note</string>
+    <string name="main_add_some_peers_message">It seems that you didn\'t configure any peers. Go to peers section and add one from public list to get connected.</string>
     <string name="peers_add_peer">Add Configured Peer</string>
     <string name="peers_add">Add</string>
     <string name="peers_remove_title">Remove %s?</string>

app/src/main/res/values/themes.xml

@@ -18,4 +18,8 @@
         <item name="tableBackgroundColor">@color/white</item>
         <item name="textDefault">@color/black</item>
     </style>
+
+    <style name="YggdrasilDialogs" parent="@style/Theme.MaterialComponents.DayNight.Dialog">
+        <item name="colorPrimary">@color/green</item>
+    </style>
 </resources>