AOD: Adjust header to spec

- factor out attributes to themes
- use themeing to change ambient header to larger text and icon size

Bug: 30876804
Test: receive notification on ambient screen, observe that header text is slightly larger
Change-Id: I70f79400e2ce47b862b3b501421aa71187866e61

core/res/res/layout/notification_template_header.xml

@@ -17,27 +17,24 @@
 
 <NotificationHeaderView
     xmlns:android="http://schemas.android.com/apk/res/android"
+    android:theme="@style/Theme.Material.Notification"
     android:id="@+id/notification_header"
     android:orientation="horizontal"
     android:layout_width="wrap_content"
     android:layout_height="@dimen/notification_header_height"
     android:clipChildren="false"
-    android:paddingTop="@dimen/notification_header_padding_top"
-    android:paddingBottom="@dimen/notification_header_padding_bottom"
-    android:layout_marginBottom="5dp"
-    android:paddingStart="@dimen/notification_content_margin_start"
-    android:paddingEnd="16dp">
+    style="?attr/notificationHeaderStyle">
     <com.android.internal.widget.CachingIconView
         android:id="@+id/icon"
-        android:layout_width="@dimen/notification_header_icon_size"
-        android:layout_height="@dimen/notification_header_icon_size"
+        android:layout_width="?attr/notificationHeaderIconSize"
+        android:layout_height="?attr/notificationHeaderIconSize"
         android:layout_marginEnd="3dp"
         />
     <TextView
         android:id="@+id/app_name_text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textAppearance="@style/TextAppearance.Material.Notification.Info"
+        android:textAppearance="?attr/notificationHeaderTextAppearance"
         android:layout_marginStart="3dp"
         android:layout_marginEnd="2dp"
         android:singleLine="true"
@@ -46,7 +43,7 @@
         android:id="@+id/header_text_divider"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textAppearance="@style/TextAppearance.Material.Notification.Info"
+        android:textAppearance="?attr/notificationHeaderTextAppearance"
         android:layout_marginStart="2dp"
         android:layout_marginEnd="2dp"
         android:text="@string/notification_header_divider_symbol"
@@ -55,7 +52,7 @@
         android:id="@+id/header_text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textAppearance="@style/TextAppearance.Material.Notification.Info"
+        android:textAppearance="?attr/notificationHeaderTextAppearance"
         android:layout_marginStart="2dp"
         android:layout_marginEnd="2dp"
         android:visibility="gone"
@@ -64,7 +61,7 @@
         android:id="@+id/time_divider"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textAppearance="@style/TextAppearance.Material.Notification.Info"
+        android:textAppearance="?attr/notificationHeaderTextAppearance"
         android:layout_marginStart="2dp"
         android:layout_marginEnd="2dp"
         android:text="@string/notification_header_divider_symbol"

core/res/res/layout/notification_template_material_ambient.xml

@@ -23,7 +23,8 @@
     android:paddingStart="@dimen/notification_extra_margin_ambient"
     android:paddingEnd="@dimen/notification_extra_margin_ambient"
     >
-    <include layout="@layout/notification_template_header" />
+    <include layout="@layout/notification_template_header"
+        android:theme="@style/Theme.Material.Notification.Ambient" />
 
     <LinearLayout
             android:id="@+id/notification_action_list_margin_target"

core/res/res/values/attrs.xml

@@ -8630,5 +8630,12 @@
         <attr name="stackFromEnd" format="boolean" />
     </declare-styleable>
 
+    <!-- @hide -->
+    <declare-styleable name="NotificationTheme">
+        <attr name="notificationHeaderStyle" format="reference" />
+        <attr name="notificationHeaderTextAppearance" format="reference" />
+        <attr name="notificationHeaderIconSize" format="dimension" />
+    </declare-styleable>
+
     <attr name="lockPatternStyle" format="reference" />
 </resources>

core/res/res/values/dimens.xml

@@ -191,6 +191,9 @@
     <!-- size (width and height) of the icon in the notification header -->
     <dimen name="notification_header_icon_size">18dp</dimen>
 
+    <!-- size (width and height) of the icon in the notification header -->
+    <dimen name="notification_header_icon_size_ambient">20dp</dimen>
+
     <!-- Height of a small notification in the status bar -->
     <dimen name="notification_min_height">92dp</dimen>
 

core/res/res/values/styles_material.xml

@@ -488,6 +488,10 @@ please see styles_device_defaults.xml.
 
     <style name="TextAppearance.Material.Notification.Time" parent="TextAppearance.Material.Notification.Info" />
 
+    <style name="TextAppearance.Material.Notification.Info.Ambient">
+        <item name="textSize">@dimen/notification_text_size</item>
+    </style>
+
     <style name="TextAppearance.Material.Notification.Emphasis">
         <item name="textColor">#66000000</item>
     </style>
@@ -1283,4 +1287,12 @@ please see styles_device_defaults.xml.
 
     <style name="DialogWindowTitle.Material.Light" />
 
+    <style name="Notification.Header" parent="">
+        <item name="paddingTop">@dimen/notification_header_padding_top</item>
+        <item name="paddingBottom">@dimen/notification_header_padding_bottom</item>
+        <item name="layout_marginBottom">5dp</item>
+        <item name="paddingStart">@dimen/notification_content_margin_start</item>
+        <item name="paddingEnd">16dp</item>
+    </style>
+
 </resources>

core/res/res/values/themes_material.xml

@@ -1321,6 +1321,19 @@ please see themes_device_defaults.xml.
         <item name="windowNoTitle">true</item>
     </style>
 
+    <!-- Theme for inflating notifications -->
+    <style name="Theme.Material.Notification" parent="">
+        <item name="notificationHeaderStyle">@style/Notification.Header</item>
+        <item name="notificationHeaderTextAppearance">@style/TextAppearance.Material.Notification.Info</item>
+        <item name="notificationHeaderIconSize">@dimen/notification_header_icon_size</item>
+    </style>
+
+    <!-- Theme for inflating ambient notification -->
+    <style name="Theme.Material.Notification.Ambient">
+        <item name="notificationHeaderTextAppearance">@style/TextAppearance.Material.Notification.Info.Ambient</item>
+        <item name="notificationHeaderIconSize">@dimen/notification_header_icon_size_ambient</item>
+    </style>
+
     <!-- Default theme for Settings and activities launched from Settings. -->
     <style name="Theme.Material.Settings" parent="Theme.Material.Light.LightStatusBar">
         <item name="colorPrimary">@color/primary_material_settings_light</item>