转载自：
http://blog.csdn.net/u012364372/article/details/51088831
1. 设定屏幕方向
当指定了屏幕的方向后（非SCREEN_ORIENTATION_UNSPECIFIED），屏幕就不会自动的旋转了
有2中方式控制屏幕方向：
1.1 修改AndroidManifest.xml
在AndroidManifest.xml的activity中加入:
横屏：
android:screenOrientation=”landscape”
竖屏：
android:screenOrientation=”portrait”
1.2 setRequestedOrientation
横屏：
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
竖屏：
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
ActivityInfo:
int
SCREEN_ORIENTATION_BEHIND
|
Constant corresponding to behind in the screenOrientation attribute.
|
|
int
|
SCREEN_ORIENTATION_FULL_SENSOR
Constant corresponding to fullSensor in the screenOrientation attribute.
int
SCREEN_ORIENTATION_FULL_USER
Constant corresponding to fullUser in the screenOrientation attribute.
int
SCREEN_ORIENTATION_LANDSCAPE
Constant corresponding to landscape in the screenOrientation attribute.
int
SCREEN_ORIENTATION_LOCKED
Constant corresponding to locked in the screenOrientation attribute.
int
SCREEN_ORIENTATION_NOSENSOR
Constant corresponding to nosensor in the screenOrientation attribute.
int
SCREEN_ORIENTATION_PORTRAIT
Constant corresponding to portrait in the screenOrientation attribute.
int
SCREEN_ORIENTATION_REVERSE_LANDSCAPE
Constant corresponding to reverseLandscape in the screenOrientation attribute.
int
SCREEN_ORIENTATION_REVERSE_PORTRAIT
Constant corresponding to reversePortrait in the screenOrientation attribute.
int
SCREEN_ORIENTATION_SENSOR
Constant corresponding to sensor in the screenOrientation attribute.
int
SCREEN_ORIENTATION_SENSOR_LANDSCAPE
Constant corresponding to sensorLandscape in the screenOrientation attribute.
int
SCREEN_ORIENTATION_SENSOR_PORTRAIT
Constant corresponding to sensorPortrait in the screenOrientation attribute.
int
SCREEN_ORIENTATION_UNSPECIFIED
|
Constant corresponding to unspecified in the screenOrientation attribute.
int
|
SCREEN_ORIENTATION_USER
Constant corresponding to user in the screenOrientation attribute.
int
SCREEN_ORIENTATION_USER_LANDSCAPE
Constant corresponding to userLandscape in the screenOrientation attribute.
int
SCREEN_ORIENTATION_USER_PORTRAIT
Constant corresponding to userPortrait in the screenOrientation attribute.
2. 禁止 屏幕旋转后重置Activity
屏幕旋转后会强制调用Activity.onCreate方法，所以会重置Activity
禁止方法：
修改AndroidManifest.xml
android:configChanges=”orientation”
最近在做Android的播放器，遇到采用以上方法后，仍然出现屏幕旋转后触发Activity.onCreate，经查阅资料后，发现需要添加screenSize处理
具体代码为：
[html] view plaincopy
- android:configChanges="orientation|keyboardHidden|screenSize"
禁止重置Activity会造成Screen的宽高颠倒， 需要手动修正。