diff --git a/app/src/main/java/net/mynero/wallet/MoneroApplication.java b/app/src/main/java/net/mynero/wallet/MoneroApplication.java
index ead129c..4686c7c 100644
--- a/app/src/main/java/net/mynero/wallet/MoneroApplication.java
+++ b/app/src/main/java/net/mynero/wallet/MoneroApplication.java
@@ -5,11 +5,20 @@ import android.app.Application;
 import net.mynero.wallet.service.PrefService;
 import net.mynero.wallet.util.NightmodeHelper;
 
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 public class MoneroApplication extends Application {
+    private ExecutorService executor = null;
     @Override
     public void onCreate() {
         super.onCreate();
         new PrefService(this);
         NightmodeHelper.getAndSetPreferredNightmode();
+        executor = Executors.newFixedThreadPool(16);
+    }
+
+    public ExecutorService getExecutor() {
+        return executor;
     }
 }
diff --git a/app/src/main/java/net/mynero/wallet/fragment/dialog/SendBottomSheetDialog.java b/app/src/main/java/net/mynero/wallet/fragment/dialog/SendBottomSheetDialog.java
index 8139962..ccaa130 100644
--- a/app/src/main/java/net/mynero/wallet/fragment/dialog/SendBottomSheetDialog.java
+++ b/app/src/main/java/net/mynero/wallet/fragment/dialog/SendBottomSheetDialog.java
@@ -2,7 +2,6 @@ package net.mynero.wallet.fragment.dialog;
 
 import android.app.Activity;
 import android.content.Context;
-import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -26,6 +25,7 @@ import com.google.zxing.client.android.Intents;
 import com.journeyapps.barcodescanner.ScanContract;
 import com.journeyapps.barcodescanner.ScanOptions;
 
+import net.mynero.wallet.MoneroApplication;
 import net.mynero.wallet.R;
 import net.mynero.wallet.model.CoinsInfo;
 import net.mynero.wallet.model.PendingTransaction;
@@ -38,6 +38,8 @@ import net.mynero.wallet.util.UriData;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 public class SendBottomSheetDialog extends BottomSheetDialogFragment {
     private final MutableLiveData<Boolean> _sendingMax = new MutableLiveData<>(false);
@@ -234,7 +236,7 @@ public class SendBottomSheetDialog extends BottomSheetDialogFragment {
     }
 
     private void sendTx(PendingTransaction pendingTx) {
-        AsyncTask.execute(() -> {
+        ((MoneroApplication)getActivity().getApplication()).getExecutor().execute(() -> {
             boolean success = TxService.getInstance().sendTx(pendingTx);
             Activity activity = getActivity();
             if (activity != null) {
@@ -252,7 +254,7 @@ public class SendBottomSheetDialog extends BottomSheetDialogFragment {
     }
 
     private void createTx(String address, String amount, boolean sendAll, PendingTransaction.Priority feePriority) {
-        AsyncTask.execute(() -> {
+        ((MoneroApplication)getActivity().getApplication()).getExecutor().execute(() -> {
             try {
                 PendingTransaction pendingTx = TxService.getInstance().createTx(address, amount, sendAll, feePriority, selectedUtxos);
                 if (pendingTx != null && pendingTx.getStatus() == PendingTransaction.Status.Status_Ok) {
diff --git a/app/src/main/java/net/mynero/wallet/fragment/onboarding/OnboardingFragment.java b/app/src/main/java/net/mynero/wallet/fragment/onboarding/OnboardingFragment.java
index 57ee921..c70f736 100644
--- a/app/src/main/java/net/mynero/wallet/fragment/onboarding/OnboardingFragment.java
+++ b/app/src/main/java/net/mynero/wallet/fragment/onboarding/OnboardingFragment.java
@@ -1,6 +1,5 @@
 package net.mynero.wallet.fragment.onboarding;
 
-import android.os.AsyncTask;
 import android.os.Bundle;
 import android.text.Editable;
 import android.text.TextWatcher;
@@ -19,6 +18,7 @@ import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
 
 import net.mynero.wallet.MainActivity;
+import net.mynero.wallet.MoneroApplication;
 import net.mynero.wallet.R;
 import net.mynero.wallet.model.Wallet;
 import net.mynero.wallet.model.WalletManager;
@@ -26,6 +26,8 @@ import net.mynero.wallet.service.PrefService;
 import net.mynero.wallet.util.Constants;
 
 import java.io.File;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 public class OnboardingFragment extends Fragment {
 
@@ -52,7 +54,7 @@ public class OnboardingFragment extends Fragment {
         moreOptionsChevronImageView.setOnClickListener(view12 -> mViewModel.onMoreOptionsClicked());
 
         createWalletButton.setOnClickListener(view1 -> {
-            AsyncTask.execute(() -> {
+            ((MoneroApplication)getActivity().getApplication()).getExecutor().execute(() -> {
                 createOrImportWallet(
                         walletPasswordEditText.getText().toString(),
                         walletSeedEditText.getText().toString().trim(),
@@ -115,6 +117,7 @@ public class OnboardingFragment extends Fragment {
                 wallet = WalletManager.getInstance().recoveryWallet(walletFile, walletPassword, walletSeed, "", restoreHeight);
             }
             Wallet.Status walletStatus = wallet.getStatus();
+            wallet.close();
             boolean ok = walletStatus.isOk();
             walletFile.delete(); // cache is broken for some reason when recovering wallets. delete the file here. this happens in monerujo too.
 
@@ -122,7 +125,7 @@ public class OnboardingFragment extends Fragment {
                 mainActivity.init(walletFile, walletPassword);
                 mainActivity.runOnUiThread(mainActivity::onBackPressed);
             } else {
-                Toast.makeText(mainActivity, getString(R.string.create_wallet_failed, walletStatus.getErrorString()), Toast.LENGTH_SHORT).show();
+                mainActivity.runOnUiThread(() -> Toast.makeText(mainActivity, getString(R.string.create_wallet_failed, walletStatus.getErrorString()), Toast.LENGTH_SHORT).show());
             }
         }
     }
diff --git a/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsFragment.java b/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsFragment.java
index 1865ba7..21a46e4 100644
--- a/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsFragment.java
+++ b/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsFragment.java
@@ -1,6 +1,5 @@
 package net.mynero.wallet.fragment.settings;
 
-import android.os.AsyncTask;
 import android.os.Bundle;
 import android.text.Editable;
 import android.text.TextWatcher;
@@ -23,6 +22,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.navigation.fragment.NavHostFragment;
 
+import net.mynero.wallet.MoneroApplication;
 import net.mynero.wallet.R;
 import net.mynero.wallet.data.DefaultNodes;
 import net.mynero.wallet.data.Node;
@@ -38,6 +38,9 @@ import net.mynero.wallet.util.Constants;
 import net.mynero.wallet.util.DayNightMode;
 import net.mynero.wallet.util.NightmodeHelper;
 
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 public class SettingsFragment extends Fragment implements PasswordBottomSheetDialog.PasswordListener, NodeSelectionBottomSheetDialog.NodeSelectionDialogListener, AddNodeBottomSheetDialog.AddNodeListener {
 
     private SettingsViewModel mViewModel;
@@ -54,7 +57,7 @@ public class SettingsFragment extends Fragment implements PasswordBottomSheetDia
         public void afterTextChanged(Editable editable) {
             if (mViewModel != null) {
                 mViewModel.setProxyAddress(editable.toString());
-                mViewModel.updateProxy();
+                mViewModel.updateProxy(((MoneroApplication)getActivity().getApplication()));
             }
         }
     };
@@ -71,7 +74,7 @@ public class SettingsFragment extends Fragment implements PasswordBottomSheetDia
         public void afterTextChanged(Editable editable) {
             if (mViewModel != null) {
                 mViewModel.setProxyPort(editable.toString());
-                mViewModel.updateProxy();
+                mViewModel.updateProxy(((MoneroApplication)getActivity().getApplication()));
             }
         }
     };
@@ -142,7 +145,7 @@ public class SettingsFragment extends Fragment implements PasswordBottomSheetDia
                 proxySettingsLayout.setVisibility(View.GONE);
             }
 
-            mViewModel.updateProxy();
+            mViewModel.updateProxy(((MoneroApplication)getActivity().getApplication()));
         });
 
         displaySeedButton.setOnClickListener(view1 -> {
@@ -221,8 +224,8 @@ public class SettingsFragment extends Fragment implements PasswordBottomSheetDia
     public void onNodeSelected() {
         Node node = Node.fromString(PrefService.getInstance().getString(Constants.PREF_NODE, DefaultNodes.XMRTW.getAddress()));
         selectNodeButton.setText(getString(R.string.node_button_text, node.getAddress()));
-        mViewModel.updateProxy();
-        AsyncTask.execute(() -> {
+        mViewModel.updateProxy(((MoneroApplication)getActivity().getApplication()));
+        ((MoneroApplication)getActivity().getApplication()).getExecutor().execute(() -> {
             WalletManager.getInstance().getWallet().init(0);
             WalletManager.getInstance().getWallet().startRefresh();
         });
diff --git a/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsViewModel.java b/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsViewModel.java
index 0410940..be143a6 100644
--- a/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsViewModel.java
+++ b/app/src/main/java/net/mynero/wallet/fragment/settings/SettingsViewModel.java
@@ -1,22 +1,25 @@
 package net.mynero.wallet.fragment.settings;
 
-import android.os.AsyncTask;
 import android.util.Patterns;
 
 import androidx.lifecycle.ViewModel;
 
+import net.mynero.wallet.MoneroApplication;
 import net.mynero.wallet.data.DefaultNodes;
 import net.mynero.wallet.model.WalletManager;
 import net.mynero.wallet.service.PrefService;
 import net.mynero.wallet.util.Constants;
 
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
 public class SettingsViewModel extends ViewModel {
 
     private String proxyAddress = "";
     private String proxyPort = "";
 
-    public void updateProxy() {
-        AsyncTask.execute(() -> {
+    public void updateProxy(MoneroApplication application) {
+        application.getExecutor().execute(() -> {
             boolean usesProxy = PrefService.getInstance().getBoolean(Constants.PREF_USES_TOR, false);
             String currentNodeString = PrefService.getInstance().getString(Constants.PREF_NODE, DefaultNodes.XMRTW.getAddress());
             boolean isNodeLocalIp = currentNodeString.startsWith("10.") || currentNodeString.startsWith("192.168.") || currentNodeString.equals("localhost") || currentNodeString.equals("127.0.0.1");