Exercise: style

A style is a set of one or more formatting attributes that you can apply as a unit to single elements in your layout XML file(s). For example, you could define a style that specifies a certain text size and color, then apply it to instances of a certain type of View element.

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Create a dummy Android Application, AndroidStyle. Create style.xml in the folder res > values

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <style name="StyleText1">
     <item name="android:textSize">20sp</item>
     <item name="android:textColor">#EC9200</item>
     <item name="android:gravity">center_horizontal</item>
 
 </style>
 <style name="StyleText2">
     <item name="android:textSize">30sp</item>
     <item name="android:textColor">#990000</item>
     <item name="android:gravity">right</item>
 </style>
 <style name="StyleButton1">
     <item name="android:layout_width">wrap_content</item>
     <item name="android:layout_height">wrap_content</item>
 </style>
 <style name="StyleButton2">
     <item name="android:layout_width">fill_parent</item>
     <item name="android:layout_height">fill_parent</item>
 </style>    
</resources>

Modify main.xml to apply the styles.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
<TextView
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="@string/hello"
 />
<TextView
 style="@style/StyleText1"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="It's StyleText1"
 />
<TextView
 style="@style/StyleText2"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="It's StyleText2"
 />
<Button
 style="@style/StyleButton1"
 android:text="It's StyleButton1"
 />
<Button
 style="@style/StyleButton2"
 android:text="It's StyleButton2"
 /> 
</LinearLayout>