diff --git a/library/src/main/java/org/lucasr/dspec/DesignSpecActivity.java b/library/src/main/java/org/lucasr/dspec/DesignSpecActivity.java
new file mode 100644
index 0000000..8d9319c
--- /dev/null
+++ b/library/src/main/java/org/lucasr/dspec/DesignSpecActivity.java
@@ -0,0 +1,46 @@
+package org.lucasr.dspec;
+
+import android.app.Activity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.FrameLayout;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: Sergey Chuvashev
+ * Date: 08.09.14
+ * Time: 23:30
+ */
+public class DesignSpecActivity extends Activity {
+
+    private DesignSpecFrameLayout mDesignSpecFrameLayout;
+
+    @Override
+    public void onContentChanged() {
+        super.onContentChanged();
+
+        ViewGroup rootView = (ViewGroup) findViewById(android.R.id.content);
+
+        DesignSpecFrameLayout designSpecFrameLayout = new DesignSpecFrameLayout(this);
+
+        mDesignSpecFrameLayout = designSpecFrameLayout;
+
+        int childCount = rootView.getChildCount();
+
+        View child;
+        for (int i = childCount - 1; i >= 0; i--) {
+            child = rootView.getChildAt(i);
+            rootView.removeView(child);
+            designSpecFrameLayout.addView(child);
+        }
+
+        rootView.addView(designSpecFrameLayout,
+                new FrameLayout.LayoutParams(
+                        FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT));
+    }
+
+    public DesignSpec getDesignSpec() {
+        return mDesignSpecFrameLayout.getDesignSpec();
+    }
+
+}