太原seo网站优化,建设维护网站 未签订合同,直接用apk 做登陆网站,查看网站主机安卓11上调双屏异显功能#xff0c;系统驱动默认支持双背光功能#xff0c;老一点的系统不支持双背光驱动#xff0c;所以老版本的双屏异显都是同时控制2个屏的背光#xff0c;客户也没做特别要求#xff0c;新版本客户有这个需求了#xff0c;所以就想办法去实现#x…安卓11上调双屏异显功能系统驱动默认支持双背光功能老一点的系统不支持双背光驱动所以老版本的双屏异显都是同时控制2个屏的背光客户也没做特别要求新版本客户有这个需求了所以就想办法去实现底层已经出现了2个背光节点但是上层就没有做这个功能硬件上2个背光也是分开的默认双屏点亮后系统只能调默认原生的那个背光自己修改节点的背光要想办法去实现不说了直接上货 1.从系统状态栏滑竿调整背光的代码开始追起 frameworks/base/packages/SystemUI/src/com/android/systemui/settings/BrightnessController.javapublic void onChanged(ToggleSlider toggleSlider, boolean tracking, boolean automatic,int value, boolean stopTracking) -final float valFloat convertGammaToLinearFloat(value,minBacklight, maxBacklight);if (stopTracking) {// TODO(brightnessfloat): change to use float value instead.MetricsLogger.action(mContext, metric,BrightnessSynchronizer.brightnessFloatToInt(mContext, valFloat));}setBrightness(valFloat);private void setBrightness(float brightness) {mDisplayManager.setTemporaryBrightness(brightness);}
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frameworks/base/core/java/android/hardware/display/DisplayManager.javapublic void setTemporaryBrightness(float brightness) {mGlobal.setTemporaryBrightness(brightness);}
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frameworks/base/core/java/android/hardware/display/DisplayManagerGlobal.javapublic void setTemporaryBrightness(float brightness) {try {mDm.setTemporaryBrightness(brightness);} catch (RemoteException ex) {throw ex.rethrowFromSystemServer();}}2.中间代码有兴趣的自己追我不追了最终会调用到hal层里面修改补丁如下
Index: hardware/rockchip/light_aidl/Android.bp--- hardware/rockchip/light_aidl/Android.bp (revision 844)hardware/rockchip/light_aidl/Android.bp (working copy)-7,6 7,7 shared_libs: [libbase,liblog,libcutils, //加这个是为了在cpp文件调用property接口libbinder_ndk,android.hardware.light-ndk_platform,],
Index: hardware/rockchip/light_aidl/Lights.cpp--- hardware/rockchip/light_aidl/Lights.cpp (revision 844)hardware/rockchip/light_aidl/Lights.cpp (working copy)-23,6 23,7 #include aidl/android/hardware/light/LightType.h#include aidl/android/hardware/light/FlashMode.h
#include cutils/properties.husing namespace std; -54,9 55,19 }const char* getDriverPath(LightType type) {switch (type) {case LightType::BACKLIGHT:
- return /sys/class/backlight/backlight/brightness;char value[PROPERTY_VALUE_MAX];property_get(persist.sys.backlight, value, );if(!strcmp(value,1)){return /sys/class/backlight/backlight1/brightness;}else{return /sys/class/backlight/backlight/brightness;}case LightType::BUTTONS:return /sys/class/leds/button-backlight/brightness;case LightType::BATTERY:
