catch nullpointer exception in ConfigureProviderFragment

1 files changed, 3 insertions, 1 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ConfigureProviderFragment.java b/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ConfigureProviderFragment.java
index cdb255fc..f20bc9b6 100644
--- a/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ConfigureProviderFragment.java
+++ b/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ConfigureProviderFragment.java
@@ -223,8 +223,10 @@ public class ConfigureProviderFragment extends BaseSetupFragment implements Prop
                 setupActivityCallback.onProviderSelected(provider);
                 handler.postDelayed(() -> {
                     if (!ProviderSetupObservable.isCanceled()) {
-                        if (setupActivityCallback != null) {
+                        try {
                             setupActivityCallback.onConfigurationSuccess();
+                        } catch (NullPointerException npe) {
+                            // callback disappeared in the meanwhile
                         }
                     }
                 }, 750);