refactoring: extract view pager activity for re-use

1 files changed, 32 insertions, 0 deletions

diff --git a/main/src/cgeo/geocaching/ui/AbstractCachingPageViewCreator.java b/main/src/cgeo/geocaching/ui/AbstractCachingPageViewCreator.java
new file mode 100644
index 0000000..cf159f8
--- /dev/null
+++ b/main/src/cgeo/geocaching/ui/AbstractCachingPageViewCreator.java
@@ -0,0 +1,32 @@
+package cgeo.geocaching.ui;
+
+import cgeo.geocaching.activity.AbstractViewPagerActivity.PageViewCreator;
+
+import android.view.View;
+
+/**
+ * View creator which destroys the created view on every {@link #notifyDataSetChanged()}.
+ *
+ * @param <ViewClass>
+ */
+public abstract class AbstractCachingPageViewCreator<ViewClass extends View> implements PageViewCreator {
+
+    protected ViewClass view;
+
+    @Override
+    public final void notifyDataSetChanged() {
+        view = null;
+    }
+
+    @Override
+    public final View getView() {
+        if (view == null) {
+            view = getDispatchedView();
+        }
+
+        return view;
+    }
+
+    @Override
+    public abstract ViewClass getDispatchedView();
+}