ImageView 點擊效果 selector 設置

1、圖片點擊後，效果存留

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:drawable="@drawable/keyboard_selected" />
    <item android:drawable="@drawable/keyboard_normal" />
</selector>

2、圖片點擊時改變，擡起恢復

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/num_normal" android:state_pressed="false"/>
    <item android:drawable="@drawable/num_selected" android:state_pressed="true"/>

</selector>