1、副屏横竖屏调整

对设备显示及物理上方向进行替换，这个操作在一开始加载的时候就会进行，只会进行一次。修改如下

frameworks/base/services/core/java/com/android/server/display/LocalDisplayAdapter.java

@Overridepublic DisplayDeviceInfo getDisplayDeviceInfoLocked() {    ... ...    // For demonstration purposes, allow rotation of the external display.    // In the future we might allow the user to configure this directly.    // 这部分就是旋转的操作-    if ("portrait".equals(SystemProperties.get("persist.demo.hdmirotation"))) {+    String rotation = SystemProperties.get("persist.demo.hdmirotation");+    if ("ROTATION_270".equals(rotation)) {        mInfo.rotation = Surface.ROTATION_270;+    } else {+        mInfo.rotation = Surface.ROTATION_90;    }    // For demonstration purposes, allow rotation of the external display    ... ...}

frameworks/base/services/core/java/com/android/server/display/LogicalDisplay.java

public void updateLocked(List devices) {    ... ...    mPrimaryDisplayDeviceInfo = deviceInfo;    mInfo = null;    // 替换副屏的信息+    if(mDisplayId != Display.DEFAULT_DISPLAY){+        mBaseDisplayInfo.appWidth = deviceInfo.height;+        mBaseDisplayInfo.appHeight = deviceInfo.width;+        mBaseDisplayInfo.logicalWidth = deviceInfo.height;+        mBaseDisplayInfo.logicalHeight = deviceInfo.width;+    }}public void configureDisplayInTransactionLocked(DisplayDevice device,             boolean isBlanked) {    ... ...    mTempDisplayRect.top += mDisplayOffsetY;    mTempDisplayRect.bottom += mDisplayOffsetY;    // 强制界面全屏显示，否则会同步按照主屏分辨率比例去显示，可能会有黑边+    if(device.getDisplayDeviceInfoLocked().type != Display.TYPE_BUILT_IN){+        mTempDisplayRect.left = 0;+        mTempDisplayRect.right = physWidth;+        mTempDisplayRect.top = 0;+        mTempDisplayRect.bottom = physHeight;+    }+    device.setProjectionInTransactionLocked(orientation, mTempLayerStackRect, mTempDisplayRect);    ... ...}

2、副屏TP过滤（异触）

系统上传的触屏event，需要在系统层进行区分，判断是内置TP（主屏tp），还是外接TP（副屏tp）。Event事件都可以在下面这支文件处理。

frameworks/native/services/inputflinger/EventHub.cpp

status_t EventHub::openDeviceLocked(const char *devicePath) {    ... ...     // Determine whether the device is external or internal.-    if (isExternalDeviceLocked(device)) {+        ALOGE("device %d: %d %s\n", device->id, device->fd, device->path.c_str());+        char buf[256];+        ioctl(device->fd, EVIOCGNAME(sizeof(buf)), buf);+        ALOGE("device name: %s", buf);         // 通过TP名称，判断是否是外接设备，达到异触效果+        if (isExternalDeviceLocked(device) || strcmp(buf, "device_name") == 0) {            device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;         }         ... ...}

3、副屏TP方向调整

副显示屏的方向，只能单独去旋转。旋转后，TP也需要跟着旋转下，在input事件上传过程中调整X、Y即可。

frameworks/native/services/inputflinger/InputReader.cpp

+int second_ID; //副屏tp的idvoid MultiTouchMotionAccumulator::process(const RawEvent* rawEvent) {    ... ...                 switch (rawEvent->code) {             // 通过ID过滤TP事件，进行TP方向调整操作             case ABS_MT_POSITION_X:                 slot->mInUse = true;-                slot->mAbsMTPositionX = rawEvent->value;+                if ((second_ID == rawEvent->deviceId)) {+                    slot->mAbsMTPositionY = rawEvent->value;+                } else {+                    slot->mAbsMTPositionX = rawEvent->value;+                }                 break;             case ABS_MT_POSITION_Y:                 slot->mInUse = true;-                slot->mAbsMTPositionY = rawEvent->value;+                if (second_ID == rawEvent->deviceId) {+                    slot->mAbsMTPositionX = 1280 - rawEvent->value + 1;+                } else {+                    slot->mAbsMTPositionY = rawEvent->value;+                }                 break;    ... ...}void MultiTouchInputMapper::configureRawPointerAxes() {    TouchInputMapper::configureRawPointerAxes();-    getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);-    getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);     // TP的name是固定的，通过getevent可以看到，但是ID不是固定的，所以通过名称判断，然后获取目前ID，后续通过ID过滤TP事件+    if(strcmp(getDeviceName().string(), "device_name") == 0) {+        second_ID = getDeviceId();+        getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.x);+        getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.y);+    } else {+        getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);+        getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);+    }     getAbsoluteAxisInfo(ABS_MT_TOUCH_MAJOR, &mRawPointerAxes.touchMajor);        ... ...}

Android(安卓)副屏相关修改

Android 副屏相关修改

1、副屏横竖屏调整

2、副屏TP过滤（异触）

3、副屏TP方向调整

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