android:configChanges locale 改语言后,该配置不起作用的原因

4.2中,app配置了configChanges locale属性后,当app处于后台,并没有finish时,如果改变语言,并不会在resume时调用Activity重写的onConfigurationChanged函数。

原因是,4.2增加了一个 layoutDirection 属性,当改变语言设置后,该属性也会成newConfig中的一个mask位。所以ActivityManagerService(实际在ActivityStack)在决定是否重启Activity的时候总是判断为重启。
当在 android:configChanges 中同时添加locale和layoutDirection时,才会发生app期望的事情。
SDK文档中有:
"orientation" The screen orientation has changed — the user has rotated the device.

Note: If your application targets API level 13 or higher (as declared by the minSdkVersion and targetSdkVersion attributes), then you should also declare the "screenSize" configuration, because it also changes when a device switches between portrait and landscape orientations.

但是在locale中却没有说明.


 转载: http://blog.sina.com.cn/s/blog_629712650101a1o3.html

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