Buttonでstyleとバックグラウンドdrawableを設定する方法

シンプルなButtonのデザイン.The layout XML:

<Button
    android:id="@+id/sample_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/button_caption"
    android:padding="6dp"
    android:layout_marginBottom="6dp"
    android:layout_marginRight="6dp"
    style="@style/CustomButton"
    android:textSize="16sp" />

The style:

<style name="CustomButton">
    <item name="android:layout_gravity">center_horizontal</item>
    <item name="android:padding">6dp</item>
    <item name="android:background">@drawable/custom_button</item>
    <item name="android:textColor">#ffffff</item>
    <item name="android:gravity">center</item>
    <item name="android:textStyle">bold</item></style>

The drawable:

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape>
            <solid
                android:color="#60ff0000" />
            <stroke
                android:width="1dp"
                android:color="#ffffff" />
            <corners
                android:radius="4dp" />
            <padding
                android:left="6dp"
                android:top="6dp"
                android:right="6dp"
                android:bottom="6dp" />
        </shape>
    </item>
    <item>
        <shape>
            <solid
                android:color="#90ff0000" />
            <stroke
                android:width="1dp"
                android:color="#ffffff" />
            <corners
                android:radius="4dp" />
            <padding
                android:left="6dp"
                android:top="6dp"
                android:right="6dp"
                android:bottom="6dp" />
        </shape>
    </item></selector>