一种情况是在API 13和更高的版本中，不仅要加screenSize,还需要orientation来保证分辨率改变后不被系统杀掉重启。
If your target build version is Honeycomb 3.2 (API Level 13) or higher you must put the screenSize flag too, as in:
<activity
android:configChanges="orientation|screenSize|keyboardHidden"
android:name="YOUR ACTIVITY NAME">
</activity>
html
because even with the "orientation" flag you app will be killed and recreated again with every orientation change when your app is the active one, either being visible on screen or hidden by the lock screen. This is because the usable screen size, mainly in tablets, actually changes due to the change in placement of the system action bar.
