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| <title>允许的 Android 9 版本字符串</title> |
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| <p>如 <a href="android-9-cdd.pdf">Android 9 兼容性定义</a>第 3.2.2 节所述，只允许针对系统属性 <code>android.os.Build.VERSION.RELEASE</code> 使用特定字符串。这是因为应用和网站可能依赖于此字符串的可预测值，以便最终用户能够轻松可靠地识别其设备上运行的 Android 版本。</p> |
| <p>由于 Android 软件的后续版本可能会修改该字符串，但不会更改任何 API 行为，因此这类版本可能不会附带新的兼容性定义文档。此页面列出了基于 Android 9 的系统允许使用的版本。对于 Android 9 而言，只允许针对 <code>android.os.Build.VERSION.RELEASE</code> 使用以下值：</p> |
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| <li>9</li> |
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