Added Android code

[wl-app.git] / Android / app / src / main / java / com / moiseum / wolnelektury / view / search / components / EmptySupportRecyclerView.java

diff --git a/Android/app/src/main/java/com/moiseum/wolnelektury/view/search/components/EmptySupportRecyclerView.java b/Android/app/src/main/java/com/moiseum/wolnelektury/view/search/components/EmptySupportRecyclerView.java
new file mode 100644 (file)
index 0000000..dec9b6d
--- /dev/null
+++ b/Android/app/src/main/java/com/moiseum/wolnelektury/view/search/components/EmptySupportRecyclerView.java
@@ -0,0 +1,60 @@
+package com.moiseum.wolnelektury.view.search.components;
+
+import android.content.Context;
+import android.support.v7.widget.RecyclerView;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * Created by piotrostrowski on 17.07.2017.
+ */
+
+public class EmptySupportRecyclerView extends RecyclerView {
+       private View emptyView;
+
+       private AdapterDataObserver emptyObserver = new AdapterDataObserver() {
+
+
+               @Override
+               public void onChanged() {
+                       RecyclerView.Adapter<?> adapter = getAdapter();
+                       if (adapter != null && emptyView != null) {
+                               if (adapter.getItemCount() == 0) {
+                                       emptyView.setVisibility(View.VISIBLE);
+                                       EmptySupportRecyclerView.this.setVisibility(View.GONE);
+                               } else {
+                                       emptyView.setVisibility(View.GONE);
+                                       EmptySupportRecyclerView.this.setVisibility(View.VISIBLE);
+                               }
+                       }
+
+               }
+       };
+
+       public EmptySupportRecyclerView(Context context) {
+               super(context);
+       }
+
+       public EmptySupportRecyclerView(Context context, AttributeSet attrs) {
+               super(context, attrs);
+       }
+
+       public EmptySupportRecyclerView(Context context, AttributeSet attrs, int defStyle) {
+               super(context, attrs, defStyle);
+       }
+
+       @Override
+       public void setAdapter(Adapter adapter) {
+               super.setAdapter(adapter);
+
+               if (adapter != null) {
+                       adapter.registerAdapterDataObserver(emptyObserver);
+               }
+
+               emptyObserver.onChanged();
+       }
+
+       public void setEmptyView(View emptyView) {
+               this.emptyView = emptyView;
+       }
+}
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