Null safety
diff --git a/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/extension/ExtensionCircleFragment.java b/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/extension/ExtensionCircleFragment.java
index cff6907..47edf07 100644
--- a/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/extension/ExtensionCircleFragment.java
+++ b/sample/src/main/java/com/davemorrissey/labs/subscaleview/test/extension/ExtensionCircleFragment.java
@@ -17,12 +17,15 @@
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(layout.extension_circle_fragment, container, false);
- rootView.findViewById(id.next).setOnClickListener(new View.OnClickListener() {
- @Override public void onClick(View v) { ((ExtensionActivity) ExtensionCircleFragment.this.getActivity()).next(); }
- });
- rootView.findViewById(id.previous).setOnClickListener(new View.OnClickListener() {
- @Override public void onClick(View v) { ((ExtensionActivity) ExtensionCircleFragment.this.getActivity()).previous(); }
- });
+ final ExtensionActivity activity = (ExtensionActivity)getActivity();
+ if (activity != null) {
+ rootView.findViewById(id.next).setOnClickListener(new View.OnClickListener() {
+ @Override public void onClick(View v) { activity.next(); }
+ });
+ rootView.findViewById(id.previous).setOnClickListener(new View.OnClickListener() {
+ @Override public void onClick(View v) { activity.previous(); }
+ });
+ }
SubsamplingScaleImageView imageView = rootView.findViewById(id.imageView);
imageView.setImage(ImageSource.asset("sanmartino.jpg"));
return rootView;