Android系统固定横屏

矫情吗；* 2022-05-09 02:24 212阅读 0赞

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.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);  
    }

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