Controllerize invitation activities

briar-android/src/org/briarproject/android/sharing/SharingInvitationAdapter.java

@@ -0,0 +1,29 @@
+package org.briarproject.android.sharing;
+
+import android.content.Context;
+import android.view.ViewGroup;
+
+import org.briarproject.api.sharing.SharingInvitationItem;
+
+class SharingInvitationAdapter extends
+		InvitationAdapter<SharingInvitationItem, SharingInvitationViewHolder> {
+
+	SharingInvitationAdapter(Context ctx, InvitationClickListener listener) {
+		super(ctx, SharingInvitationItem.class, listener);
+	}
+
+	@Override
+	public SharingInvitationViewHolder onCreateViewHolder(
+			ViewGroup parent,
+			int viewType) {
+		return new SharingInvitationViewHolder(getView(parent));
+	}
+
+	@Override
+	public boolean areContentsTheSame(SharingInvitationItem oldItem,
+			SharingInvitationItem newItem) {
+		return oldItem.isSubscribed() == newItem.isSubscribed() &&
+				oldItem.getNewSharers().equals(newItem.getNewSharers());
+	}
+
+}