Android 高通7.1系统默认横屏显示(无G-sensor)

最新推荐文章于 2025-09-29 20:55:10 发布

原创最新推荐文章于 2025-09-29 20:55:10 发布 · 474 阅读

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#默认横屏

本文介绍了一种使竖屏设备实现横屏使用的解决方案，通过修改系统属性和相关代码来调整显示方向，确保应用程序和系统UI能正确地在横屏模式下运行。

竖屏横用，logo用的还是竖屏资源

1.添加宏控制

/device/qcom/msm8909/system.prop

 // add start
 persist.panel.orientation=270
 // add end

2.动画横屏显示

frameworks/base/cmds/bootanimation/BootAnimation.cpp

status_t BootAnimation::readyToRun() {
	mAssets.addDefaultAssets();

    sp<IBinder> dtoken(SurfaceComposerClient::getBuiltInDisplay(
            ISurfaceComposer::eDisplayIdMain));
    DisplayInfo dinfo;
    status_t status = SurfaceComposerClient::getDisplayInfo(dtoken, &dinfo);
    if (status)
        return -1;

	// add start
	int defaultOrientation = 0;
    char property[PROPERTY_VALUE_MAX];
    property_get("persist.panel.orientation", property, "0");
    defaultOrientation = atoi(property)/90;
    
    // create the native surface
    sp<SurfaceControl> control = session()->createSurface(String8("BootAnimation"),
            (defaultOrientation ==1 || defaultOrientation==3) ?dinfo.h:dinfo.w, 
            (defaultOrientation ==1 || defaultOrientation==3) ?dinfo.w:dinfo.h, PIXEL_FORMAT_RGB_565);

    if (defaultOrientation==1 || defaultOrientation==3){
       Rect destRect(dinfo.h, dinfo.w);
       mSession->setDisplayProjection(dtoken, defaultOrientation, destRect, destRect);
    }
    //add end
}

3.初始化方向

frameworks/native/services/surfaceflinger/DisplayDevice.cpp

	// add start
	int defaultOrientation = 0;
	char property[PROPERTY_VALUE_MAX];

	property_get("persist.panel.orientation", property, "0");
	defaultOrientation = atoi(property);
	switch(defaultOrientation) {
		case 0:
            defaultOrientation = DisplayState::eOrientationDefault;
            break;
        case 90:
            defaultOrientation = DisplayState::eOrientation90;
            break;
        case 180:
            defaultOrientation = DisplayState::eOrientation180;
            break;
        case 270:
            defaultOrientation = DisplayState::eOrientation270;
            break;
        default:
            defaultOrientation = DisplayState::eOrientationDefault;
            break;
    }
    // initialize the display orientation transform.
    setProjection(defaultOrientation, mViewport, mFrame); 
    // add end

4.上层方向修改

frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

	//add start
	private int mDefaultOrientation = Surface.ROTATION_0;
	
	public void setInitialDisplaySize(Display display, int width, int height, int density) {
        // This method might be called before the policy has been fully initialized
        // or for other displays we don't care about.
        if (mContext == null || display.getDisplayId() != Display.DEFAULT_DISPLAY) {
            return;
        }
        mDisplay = display;
        ...
        mForceDefaultOrientation = longSizeDp >= 960 && shortSizeDp >= 720 &&
                res.getBoolean(com.android.internal.R.bool.config_forceDefaultOrientation) &&
                // For debug purposes the next line turns this feature off with:
                // $ adb shell setprop config.override_forced_orient true
                // $ adb shell wm size reset
                !"true".equals(SystemProperties.get("config.override_forced_orient"));
                
        //add start
        String defaultOrientation = SystemProperties.get("persist.panel.orientation", "0");
        if("0".equals(defaultOrientation)) {
            mDefaultOrientation = Surface.ROTATION_0;
        } else if("90".equals(defaultOrientation)) {
            mDefaultOrientation = Surface.ROTATION_90;
        } else if("180".equals(defaultOrientation)) {
            mDefaultOrientation = Surface.ROTATION_180;
        } else if("270".equals(defaultOrientation)) {
            mDefaultOrientation = Surface.ROTATION_270;
        } else {
            mDefaultOrientation = Surface.ROTATION_0;
        }
        //add end      
	}
	...
	@Override
    public int rotationForOrientationLw(int orientation, int lastRotation) {
    		...
    		default:
                // For USER, UNSPECIFIED, NOSENSOR, SENSOR and FULL_SENSOR,
                // just return the preferred orientation we already calculated.
                if (preferredRotation >= 0) {
                    return preferredRotation;
                }
              	//  return Surface.ROTATION_0;
                return mDefaultOrientation;// modify
            }
        }
    }

frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java

	private WindowManagerService(Context context, InputManagerService inputManager,
            boolean haveInputMethods, boolean showBootMsgs, boolean onlyCore) {
            ...
		//add start
        String defaultOrientation = SystemProperties.get("persist.panel.orientation", "0");
        if("0".equals(defaultOrientation)) {
            mRotation = Surface.ROTATION_0;
        } else if("90".equals(defaultOrientation)) {
            mRotation = Surface.ROTATION_90;
        } else if("180".equals(defaultOrientation)) {
            mRotation = Surface.ROTATION_180;
        } else if("270".equals(defaultOrientation)) {
            mRotation = Surface.ROTATION_270;
        } else {
            mRotation = Surface.ROTATION_0;
        }
        //add end
	}