1 files changed, 70 insertions, 0 deletions
diff --git a/src/com/android/tv/util/ViewCache.java b/src/com/android/tv/util/ViewCache.java
new file mode 100644
index 00000000..113bda27
--- /dev/null
+++ b/src/com/android/tv/util/ViewCache.java
@@ -0,0 +1,70 @@
+package com.android.tv.util;
+
+import android.util.SparseArray;
+import android.view.View;
+
+import java.util.ArrayList;
+
+/**
+ * A cache for the views.
+ */
+public class ViewCache {
+    private final static SparseArray<ArrayList<View>> mViews = new SparseArray();
+
+    private static ViewCache sViewCache;
+
+    private ViewCache() { }
+
+    /**
+     * Returns an instance of the view cache.
+     */
+    public static ViewCache getInstance() {
+        if (sViewCache == null) {
+            return new ViewCache();
+        } else {
+            return sViewCache;
+        }
+    }
+
+    /**
+     * Returns if the view cache is empty.
+     */
+    public boolean isEmpty() {
+        return mViews.size() == 0;
+    }
+
+    /**
+     * Stores a view into this view cache.
+     */
+    public void putView(int resId, View view) {
+        ArrayList<View> views = mViews.get(resId);
+        if (views == null) {
+            views = new ArrayList();
+            mViews.put(resId, views);
+        }
+        views.add(view);
+    }
+
+    /**
+     * Returns the view for specific resource id.
+     */
+    public View getView(int resId) {
+        ArrayList<View> views = mViews.get(resId);
+        if (views != null && !views.isEmpty()) {
+            View view = views.remove(views.size() - 1);
+            if (views.isEmpty()) {
+                mViews.remove(resId);
+            }
+            return view;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Clears the view cache.
+     */
+    public void clear() {
+        mViews.clear();
+    }
+}