diff --git a/src/com/android/settings/wifi/NetworkRequestDialogActivity.java b/src/com/android/settings/wifi/NetworkRequestDialogActivity.java
index 30f38d2..7b7d33f 100644
--- a/src/com/android/settings/wifi/NetworkRequestDialogActivity.java
+++ b/src/com/android/settings/wifi/NetworkRequestDialogActivity.java
@@ -27,12 +27,14 @@
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.HandlerExecutor;
+import android.os.Looper;
 import android.os.Message;
 import android.widget.Toast;
 
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentManager;
 
 import com.android.settings.R;
 import com.android.settings.wifi.NetworkRequestErrorDialogFragment.ERROR_DIALOG_TYPE;
@@ -143,7 +145,7 @@
         super.onPause();
     }
 
-    private final Handler mHandler = new Handler() {
+    private final Handler mHandler = new Handler(Looper.getMainLooper()) {
         @Override
         public void handleMessage(Message msg) {
             switch (msg.what) {
@@ -162,13 +164,17 @@
         dismissDialogs();
 
         // Throws error dialog.
+        final FragmentManager fragmentManager = getSupportFragmentManager();
+        if (fragmentManager.isDestroyed() || fragmentManager.isStateSaved()) {
+            return;
+        }
         final NetworkRequestErrorDialogFragment dialogFragment =
                 NetworkRequestErrorDialogFragment.newInstance();
         dialogFragment.setRejectCallback(mUserSelectionCallback);
         final Bundle bundle = new Bundle();
         bundle.putSerializable(NetworkRequestErrorDialogFragment.DIALOG_TYPE, type);
         dialogFragment.setArguments(bundle);
-        dialogFragment.show(getSupportFragmentManager(), TAG);
+        dialogFragment.show(fragmentManager, TAG);
         mShowingErrorDialog = true;
     }