android4.0强制横屏竖屏

刺骨的言语ヽ痛彻心扉 2022-06-15 01:49 269阅读 0赞

方法一：android4.0/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： (此种方法最好用)  
android4.0/frameworks/base/services/surfaceflinger/SurfaceFlinger.cpp

void 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) {  
            //displayOrientation  
      
            switch (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);  
    }

方法三：

修改device.mk中的ro.sf.hwrotation的值为90，或在init.rc中增加一行：setprop ro.sf.hwrotation 90

[Java]: http://lib.csdn.net/base/javase
[Android]: http://lib.csdn.net/base/android