Update JoinDialog.java

core/src/mindustry/ui/dialogs/JoinDialog.java

@@ -8,6 +8,7 @@ import arc.scene.ui.*;
 import arc.scene.ui.layout.*;
 import arc.struct.*;
 import arc.util.*;
+import arc.util.Timer.*;
 import arc.util.serialization.*;
 import mindustry.*;
 import mindustry.core.*;
@@ -33,6 +34,10 @@ public class JoinDialog extends BaseDialog{
     int refreshes;
     boolean showHidden;
 
+    String lastIp;
+    int lastPort;
+    Task ping;
+
     public JoinDialog(){
         super("@joingame");
 
@@ -445,13 +450,29 @@ public class JoinDialog extends BaseDialog{
             logic.reset();
             net.reset();
             Vars.netClient.beginConnecting();
-            net.connect(ip, port, () -> {
+            net.connect(lastIp = ip, lastPort = port, () -> {
                 hide();
                 add.hide();
             });
         });
     }
 
+    public void reconnect(){
+        ui.loadfrag.show("@reconnecting");
+
+        this.ping = Timer.schedule(() -> {
+            net.pingHost(lastIp, lastPort, host -> {
+                ping.cancel();
+                connect(lastIp, lastPort);
+            }, exception -> {});
+        }, 1, 1);
+
+        ui.loadfrag.setButton(() -> {
+            ui.loadfrag.hide();
+            ping.cancel();
+        });
+    }
+
     void safeConnect(String ip, int port, int version){
         if(version != Version.build && Version.build != -1 && version != -1){
             ui.showInfo("[scarlet]" + (version > Version.build ? KickReason.clientOutdated : KickReason.serverOutdated).toString() + "\n[]" +