Added the function of deleting duplicate configurations

V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/MainActivity.kt

@@ -297,7 +297,14 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
                     .show()
             true
         }
-
+        R.id.del_duplicate_config-> {
+            AlertDialog.Builder(this).setMessage(R.string.del_config_comfirm)
+                .setPositiveButton(android.R.string.ok) { _, _ ->
+                    mainViewModel.removeDuplicateServer()
+                }
+                .show()
+            true
+        }
         R.id.del_invalid_config -> {
             AlertDialog.Builder(this).setMessage(R.string.del_config_comfirm)
                 .setPositiveButton(android.R.string.ok) { _, _ ->

V2rayNG/app/src/main/kotlin/com/v2ray/ang/viewmodel/MainViewModel.kt

@@ -201,6 +201,27 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         return -1
     }
 
+    fun removeDuplicateServer() {
+        val deleteServer = mutableListOf<String>()
+        serversCache.forEachIndexed { index, it ->
+            val outbound = it.config.getProxyOutbound()
+            serversCache.forEachIndexed { index2, it2 ->
+                if(index2 > index){
+                    val outbound2 = it2.config.getProxyOutbound()
+                    if( outbound == outbound2 && !deleteServer.contains(it2.guid))
+                    {
+                        deleteServer.add(it2.guid)
+                    }
+                }
+            }
+        }
+        for(it in deleteServer){
+            MmkvManager.removeServer(it)
+        }
+        reloadServerList()
+        getApplication<AngApplication>().toast(getApplication<AngApplication>().getString(R.string.title_del_duplicate_config_count, deleteServer.count()))
+    }
+
     private val mMsgReceiver = object : BroadcastReceiver() {
         override fun onReceive(ctx: Context?, intent: Intent?) {
             when (intent?.getIntExtra("key", 0)) {