Android屏幕显示旋转180度解决方法

方法出处：http://www.cnblogs.com/zhangdadi/archive/2012/10/29/2744603.html

//横屏正方向

if(getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE)

{

　　setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);

}

//横屏反方向

else if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE)

{

　　setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

}

//纵屏正方向

else if(getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT)

{

　　setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);

}

//纵屏反方向

else if (getRequestedOrientation() == ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT)

{

　　setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

}

ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED,

ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE,

ActivityInfo.SCREEN_ORIENTATION_PORTRAIT,

ActivityInfo.SCREEN_ORIENTATION_USER,

ActivityInfo.SCREEN_ORIENTATION_BEHIND,

ActivityInfo.SCREEN_ORIENTATION_SENSOR,

ActivityInfo.SCREEN_ORIENTATION_NOSENSOR,

ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE,

ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT,

ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE,

ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT,

ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR,