android4.0默认界面旋转180

转自http://blog.youkuaiyun.com/yicao821/article/details/7374890

不巧新拿的android4.0默认启动画面和正常显示旋转了180度，即为倒立的。原来是屏输出为倒的，查找得知可以做旋转：

步骤：

一：先把这个加上 然后加上属性ro.sf.hwrotation = 180

二：在init.rc脚本中添加如下内容：      setprop ro.sf.hwrotation180

1. 修改frameworks/base/services/surfaceflinger/SurfaceFlinger.cpp文件，在voidGraphicPlane::setDisplayHardware(DisplayHardware*hw)函数中添加如下内容：

      case 180:

           displayOrientation =ISurfaceComposer::eOrientation180;

           break;
三：frameworks\base\services\java\com\android\server\wm\ScreenRotationAnimation.java

// Screenshot does NOT include rotation!
        mSnapshotRotation = (SystemProperties.getInt("ro.sf.hwrotation",0)==180)?2:0;
        //mSnapshotRotation = 0;