使用XML定义组件样式

<TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/textViewStyle"/>

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="textViewStyle">
        <item name="android:textSize">30sp</item>
        <item name="android:textColor">#EC9237</item>
        <item name="android:text">Hello Moto</item>
    </style>

</resources>