android 屏幕旋转180度

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,