Lightswitch example a bit restructured

Author: vogella

com.vogella.android.drawable.lightswitch/res/layout/main.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
-    android:layout_height="?android:attr/listPreferredItemHeight"
+    android:layout_height="fill_parent"
     android:gravity="center"
     android:orientation="vertical" >
 

com.vogella.android.drawable.lightswitch/src/com/vogella/android/drawable/lightswitch/LightSwitchActivity.java

@@ -4,6 +4,7 @@
 import android.app.Activity;
 import android.graphics.drawable.TransitionDrawable;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.ImageView;
@@ -15,7 +16,9 @@ public class LightSwitchActivity extends Activity {
 	public void onCreate(final Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.main);
-
+		if (BuildConfig.DEBUG) {
+			Log.i("CATEGORY", "AHHHHH!!!");
+		}
 
 		final ImageView image = (ImageView) findViewById(R.id.image);
 		final ToggleButton button = (ToggleButton) findViewById(R.id.button);

com.vogella.android.userinterface.undo/res/layout/activity_main.xml

@@ -3,29 +3,24 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent" >
 
-    <RelativeLayout
+    <ListView
+        android:id="@+id/listview"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        tools:context=".MainActivity" >
-
-        <ListView
-            android:id="@+id/listview"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent" >
-        </ListView>
-    </RelativeLayout>
+        android:layout_height="match_parent" >
+    </ListView>
 
     <LinearLayout
         android:id="@+id/undobar"
-        android:visibility="gone"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="bottom|center_horizontal"
         android:layout_margin="20dp"
         android:alpha="100"
         android:background="#808080"
         android:dividerPadding="11dp"
-        android:padding="4dp" >
+        android:padding="4dp"
+        android:visibility="gone" 
+        >
 
         <TextView
             android:id="@+id/undobar_message"
@@ -40,9 +35,9 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginLeft="30dp"
-            android:onClick="onClick"
             android:background="#808080"
             android:drawableLeft="@drawable/ic_undobar_undo"
+            android:onClick="onClick"
             android:text="Undo"
             android:textAppearance="?android:attr/textAppearanceMedium"
             android:textColor="#fff" />