用代码设置android横竖屏

1. 转载来自：http://blog.csdn.net/u010403463/article/details/47126469
2. 
   
3. // 强制切换为竖屏  
4. setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);  
5. // 强制切换为横屏 
6. setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);  

设置：android:launchMode="singleTask"
            android:configChanges="orientation|keyboardHidden|screenSize"