What is the "android:" prefix in the android framework-res module

Question

I copy this code from styles.xml file in framework-res module

<style name="Theme">

    <item name="colorForeground">@android:color/bright_foreground_dark</item>
    <item name="colorForegroundInverse">@android:color/bright_foreground_dark_inverse</item>
    <item name="colorBackground">@android:color/background_dark</item>

.

<style name="Theme.Black">
    <item name="android:windowBackground">@android:color/black</item>
    <item name="android:colorBackground">@android:color/black</item>
</style>

As you can see, they all have an attribute name whose value is windowBackground. But formar has a android:, and the latter does not. Is it really necessary to write a prefix android:in the android framework?

Answer 1

I found this interesting question and tried to study it to find the answer. Here is what I found ..

from: http://developer.android.com/guide/topics/resources/style-resource.html

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style
        name="style_name"
        parent="@[package:]style/style_to_inherit">
        <item
            name="[package:]style_property_name"
            >style_value</item>
    </style>
</resources>

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from: http://developer.android.com/guide/topics/manifest/manifest-intro.html

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@[package:]type:name

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Answer 2

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setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myarray));

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