diff --git a/samples/ApiDemos/tests/src/com/example/android/apis/ApiDemosTest.java b/samples/ApiDemos/tests/src/com/example/android/apis/ApiDemosTest.java
index 0103da8..bc174ea 100644
--- a/samples/ApiDemos/tests/src/com/example/android/apis/ApiDemosTest.java
+++ b/samples/ApiDemos/tests/src/com/example/android/apis/ApiDemosTest.java
@@ -24,6 +24,12 @@
  */
 public class ApiDemosTest extends ActivityInstrumentationTestCase<ApiDemos> {
 
+    /**
+     * The first constructor parameter must refer to the package identifier of the
+     * package hosting the activity to be launched, which is specified in the AndroidManifest.xml
+     * file.  This is not necessarily the same as the java package name of the class - in fact, in
+     * some cases it may not match at all.
+     */
     public ApiDemosTest() {
         super("com.example.android.apis", ApiDemos.class);
     }
diff --git a/samples/ApiDemos/tests/src/com/example/android/apis/view/Focus2ActivityTest.java b/samples/ApiDemos/tests/src/com/example/android/apis/view/Focus2ActivityTest.java
index 91f712f..5938209 100644
--- a/samples/ApiDemos/tests/src/com/example/android/apis/view/Focus2ActivityTest.java
+++ b/samples/ApiDemos/tests/src/com/example/android/apis/view/Focus2ActivityTest.java
@@ -48,7 +48,12 @@
     private Button mCenterButton;
     private Button mRightButton;
 
-
+    /**
+     * The first constructor parameter must refer to the package identifier of the
+     * package hosting the activity to be launched, which is specified in the AndroidManifest.xml
+     * file.  This is not necessarily the same as the java package name of the class - in fact, in
+     * some cases it may not match at all.
+     */
     public Focus2ActivityTest() {
         super("com.example.android.apis", Focus2.class);
     }