Add touch feedback and focus on Dashboard tiles

- use a touch-feedback background
- declare DashboardTileView as focusable

Change-Id: I67ae19cd20374e531660232034528c995f595900

res/drawable/dashboard_tile_background.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2014 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<touch-feedback xmlns:android="http://schemas.android.com/apk/res/android"
+                android:tint="?android:attr/colorButtonPressed">
+    <item>
+        <color android:color="@android:color/white" />
+    </item>
+</touch-feedback>
+

res/layout/dashboard_tile.xml

@@ -19,8 +19,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="center_vertical"
-        android:minHeight="72dp"
-        android:background="@android:color/white">
+        android:minHeight="72dp" >
 
     <ImageView
             android:id="@+id/icon"

src/com/android/settings/dashboard/DashboardTileView.java

@@ -53,6 +53,8 @@ public class DashboardTileView extends FrameLayout implements View.OnClickListen
         mStatusTextView = (TextView) view.findViewById(R.id.status);
 
         setOnClickListener(this);
+        setBackgroundResource(R.drawable.dashboard_tile_background);
+        setFocusable(true);
     }
 
     public TextView getTitleTextView() {