按列表项的默认drawable是什么

Question

当用户按下ListView项目(android:state_pressed ="true")时,它会闪烁一个黄色的阴影(或者你可以按住).

这有什么可吸引人的？我已经创建了自己的选择器,因为我想要自己的ListView项目颜色,但是我失去了按下的颜色.

有一个关于皮肤按钮的Android文档引用了#ffff0000,但这会产生红色.

有谁知道它是什么以及如何引用它？

Answer 1

可以在中找到默认系统资源<android-sdk>/platforms/android-<version>/data/res.特别是,列表选择器定义在drawable/list_selector_background.xml:

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

    <item android:state_window_focused="false"
        android:drawable="@color/transparent" />

    <!-- Even though these two point to the same resource, have two states so the drawable will invalidate itself when coming out of pressed state. -->
    <item android:state_focused="true" android:state_enabled="false"
        android:state_pressed="true"
        android:drawable="@drawable/list_selector_background_disabled" />
    <item android:state_focused="true" android:state_enabled="false"
        android:drawable="@drawable/list_selector_background_disabled" />

    <item android:state_focused="true" android:state_pressed="true"
        android:drawable="@drawable/list_selector_background_transition" />
    <item android:state_focused="false" android:state_pressed="true"
        android:drawable="@drawable/list_selector_background_transition" />

    <item android:state_focused="true"
        android:drawable="@drawable/list_selector_background_focus" />

</selector>

印刷机上显示的可绘制list_selector_background_transition图案不是单一颜色,而是两个9色块图像,黄色和白色图像,它们之间有动画过渡.

<transition xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@android:drawable/list_selector_background_pressed"  />
    <item android:drawable="@android:drawable/list_selector_background_longpress"  />
</transition>