Android4.4强制系统横屏竖屏

http://www.linuxidc.com/Linux/2012-07/65493.htm

方法一：

 /frameworks/base/services/java/com/android/server/wm/WindowManagerService.java int computeForcedAppOrientationLocked() {        int req = getOrientationFromWindowsLocked();        if (req == ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED) {            req = getOrientationFromAppTokensLocked();        }        // req = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; //强制横屏0度        // req = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT; //强制竖屏左转90度        return req; }

方法二：

/frameworks/base/services/surfaceflinger/SurfaceFlinger.cppvoid GraphicPlane::setDisplayHardware(DisplayHardware *hw){mHw = hw;// initialize the display orientation transform.// it's a constant that should come from the display driver.int displayOrientation = ISurfaceComposer::eOrientationDefault;char property[PROPERTY_VALUE_MAX];if (property_get("ro.sf.hwrotation", property, NULL) > 0) {//displayOrientationswitch (atoi(property)) {case 0:displayOrientation = ISurfaceComposer::eOrientationDefault;break;case 90:displayOrientation = ISurfaceComposer::eOrientation90;break;case 180:displayOrientation = ISurfaceComposer::eOrientation180;break;case 270:displayOrientation = ISurfaceComposer::eOrientation270;break;}}/* 强制旋转90度 */displayOrientation = ISurfaceComposer::eOrientation90;const float w = hw->getWidth();const float h = hw->getHeight();GraphicPlane::orientationToTransfrom(displayOrientation, w, h,&mDisplayTransform);}