color, package and action bar configuration.

demos/src/main/res/layout/activity_custom_ui.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2015 Google Inc. All Rights Reserved.
 
      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
@@ skipping 22 matching lines @@
 
     <EditText
         android:id="@+id/url"
         android:text="@string/default_test_url"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:inputType="textUri" />
 
     <LinearLayout
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:paddingTop="@dimen/view_vertical_margin"
-        android:orientation="vertical">
-
-        <TextView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:textSize="@dimen/abc_text_size_medium_material"
-            android:text="@string/label_toobar_color"/>
-
-        <EditText
-            android:id="@+id/custom_toolbar_color"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:singleLine="true"
-            android:hint="@string/default_toolbar_color"
-            android:text="@string/default_toolbar_color"/>
-
-    </LinearLayout>
-
-    <LinearLayout
-        android:layout_width="match_parent"
         android:paddingTop="@dimen/view_vertical_margin"
         android:orientation="horizontal"
-        android:layout_height="wrap_content">
+        android:layout_height="@dimen/view_height">

[Ian Wen, 2016/03/16 01:35:30]

Setting height on textview is potentially dangerous, because the system font
size is beyond our control.

I recently just fixed a bug about this:
https://chromiumcodereview.appspot.com/1757583002/

I would keep wrap_content.

[BigBossZhiling, 2016/03/18 00:59:07]

Done.

 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/abc_text_size_medium_material"
             android:text="@string/label_add_action_button"/>
 
         <CheckBox
             android:id="@+id/custom_show_action_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
 
     </LinearLayout>
 
     <LinearLayout
         android:layout_width="match_parent"
         android:paddingTop="@dimen/view_vertical_margin"
-        android:layout_height="wrap_content">
+        android:layout_height="@dimen/view_height">
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/abc_text_size_medium_material"
             android:text="@string/label_add_menus"/>
 
         <CheckBox
             android:id="@+id/custom_add_menus"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
 
     </LinearLayout>
 
     <LinearLayout
         android:layout_width="match_parent"
         android:paddingTop="@dimen/view_vertical_margin"
-        android:layout_height="wrap_content">
+        android:layout_height="@dimen/view_height">
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/abc_text_size_medium_material"
             android:text="@string/label_show_title"/>
 
         <CheckBox
             android:id="@+id/show_title"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
 
     </LinearLayout>
 
     <LinearLayout
         android:layout_width="match_parent"
         android:paddingTop="@dimen/view_vertical_margin"
-        android:layout_height="wrap_content">
+        android:layout_height="@dimen/view_height">
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/abc_text_size_medium_material"
             android:text="@string/label_custom_back_button"/>
 
         <CheckBox
             android:id="@+id/custom_back_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
 
     </LinearLayout>
 
     <LinearLayout
         android:layout_width="match_parent"
         android:paddingTop="@dimen/view_vertical_margin"
-        android:layout_height="wrap_content">
+        android:layout_height="@dimen/view_height">
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/abc_text_size_medium_material"
             android:text="@string/label_auto_hide_appbar"/>
 
         <CheckBox
             android:id="@+id/auto_hide_checkbox"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />
 
     </LinearLayout>
 
     <Button
+        android:id="@+id/advanced_ui_setting"
+        android:layout_gravity="center_horizontal"
+        android:paddingTop="@dimen/button_padding_top"
+        android:layout_width="@dimen/button_width"
+        android:layout_height="@dimen/button_height"
+        android:textSize="@dimen/abc_text_size_medium_material"
+        android:text="@string/label_advanced_ui_setting" />
+
+    <Button
         android:id="@+id/start_custom_tab"
         android:layout_gravity="center_horizontal"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+        android:paddingTop="@dimen/button_padding_top"
+        android:layout_width="@dimen/button_width"
+        android:layout_height="@dimen/button_height"
+        android:textSize="@dimen/abc_text_size_medium_material"
         android:text="@string/label_start_custom_tab" />
 
 </LinearLayout>