【android】禁止横竖屏切换

今天在一个群里有群友问起、说拍照后返回页面无法显示照片！之前自己的项目也遇到过、只是没有记录，今天在此记录！

在Android 2.3平台上，我们可以需要设置界面的横竖屏显示时，可以在AndroidManifest.xml中，对Activity的属性添加以下代码：

android:configChanges="orientation"

而在3.2之后的平台上则需要多加一个参数 screenSize，写法为：

android:configChanges="orientation|screenSize"

这是因为在API level 13以后Android做了修改了，SDK描述如下：

Caution: Beginning with Android 3.2 (API level 13), the "screen size" also changes when the device switches between portrait and landscape orientation. Thus, if you want to prevent runtime restarts due to orientation change when developing for API level 13
or higher (as declared by the minSdkVersion and targetSdkVersion attributes), you must include the "screenSize" value in addition to the "orientation" value. That is, you must decalare android:configChanges="orientation|screenSize". However, if your application
targets API level 12 or lower, then your activity always handles this configuration change itself (this configuration change does not restart your activity, even when running on an Android 3.2 or higher device).
也就是说在Android 3.2(API level 13)以后，当设备横竖屏切换时屏幕尺寸也改变了。因此，如果你想在API Level 13或者更高的环境下，像以前那样阻止设备的横竖屏切换，你需要在orientation后加上screenSize。也就说你要像这样声明：android:configChanges="orientation|screenSize"。