join open group code executed in a coroutine so it's not blocking the UI

app/src/main/java/org/thoughtcrime/securesms/loki/views/OpenGroupInvitationView.kt

@@ -8,6 +8,9 @@ import android.widget.ImageView
 import android.widget.TextView
 import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import network.loki.messenger.R
 import org.session.libsession.utilities.GroupUtil
 import org.session.libsession.utilities.OpenGroupUrlParser
@@ -69,15 +72,27 @@ class OpenGroupInvitationView : FrameLayout {
 
         builder.setMessage(message)
         builder.setPositiveButton(R.string.yes) { dialog, which ->
+            GlobalScope.launch(Dispatchers.IO) {
                 try {
-                val group = OpenGroupUtilities.addGroup(context, openGroup.server, openGroup.room, openGroup.serverPublicKey)
+                    dialog.dismiss()
+                    val group = OpenGroupUtilities.addGroup(
+                        context,
+                        openGroup.server,
+                        openGroup.room,
+                        openGroup.serverPublicKey
+                    )
                     val threadID = GroupManager.getOpenGroupThreadID(group.id, context)
                     val groupID = GroupUtil.getEncodedOpenGroupID(group.id.toByteArray())
 
                     MultiDeviceProtocol.forceSyncConfigurationNowIfNeeded(context)
                 } catch (e: Exception) {
                     Log.e("JoinPublicChatActivity", "Failed to join open group.", e)
-                Toast.makeText(context, R.string.activity_join_public_chat_error, Toast.LENGTH_SHORT).show()
+                    Toast.makeText(
+                        context,
+                        R.string.activity_join_public_chat_error,
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
             }
         }
 

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

@@ -28,11 +28,11 @@
 
         <ImageView
             android:id="@+id/open_group_icon"
-            android:layout_width="wrap_content"
+            android:layout_width="48dp"
-            android:layout_height="wrap_content"
+            android:layout_height="48dp"
             android:clickable="false"
             android:visibility="gone"
-            android:layout_margin="8dp"
+            android:layout_margin="4dp"
             android:contentDescription="@string/open_group_invitation_view__join_accessibility_description"
             android:src="@drawable/ic_globe" />