android - 是否所有 android 版本 Api-8 及以上都有后退按钮

Question

后退按钮在所有 Android 手机/平板电脑 API-8 及更高版本中都可用是否正确？因为如果它不是标准功能，我想将 ActionBarsherlock 放在我的应用程序中进行导航

我的应用完全依赖于后退按钮的存在是正确的方法还是必须在某些版本上提供操作栏？

谢谢

Answer 1

是的，它在所有 API-8 + Android 手机上都可用，但为了保持一致性，操作栏中的主页图标也应该用作后退按钮:

来自 http://developer.android.com/guide/topics/ui/actionbar.html#Home

Note: Up navigation is distinct from the back navigation provided by the system Back button. The Back button is used to navigate in reverse chronological order through the history of screens the user has recently worked with. It is generally based on the temporal relationships between screens, rather than the app's hierarchy structure (which is the basis for up navigation).