MTK6757的OTG线连接鼠标后 鼠标右键改为返回功能

找到如下路径：

\frameworks\native\services\inputflinger\InputReader.cpp

找到如下函数：

uint32_t CursorButtonAccumulator::getButtonState() const {

uint32_t result = 0;

if (mBtnLeft) {

result |= AMOTION_EVENT_BUTTON_PRIMARY;

}

if (mBtnRight) {

//屏蔽如下原有代码

//result |= AMOTION_EVENT_BUTTON_SECONDARY;

//添加如下代码实现鼠标右键返回功能

result |= AMOTION_EVENT_BUTTON_BACK;

}

if (mBtnMiddle) {

result |= AMOTION_EVENT_BUTTON_TERTIARY;

}

if (mBtnBack || mBtnSide) {

result |= AMOTION_EVENT_BUTTON_BACK;

}

if (mBtnForward || mBtnExtra) {

result |= AMOTION_EVENT_BUTTON_FORWARD;

}

return result;

}