连接蓝牙设备会提示配置键盘

问题现象：连接蓝牙设备会提示配置键盘

问题分析：刚开始测试说android11存在这个问题，android10没有。

再android10上通知的地方打log看

通知必走的地方
NotificationManagerService 发现是被我们屏蔽了，问题就清楚了 不是平台差异的问题

void enqueueNotificationInternal(final String pkg, final String opPkg, final int callingUid,
final int callingPid, final String tag, final int id, final Notification notification,
int incomingUserId) {
}

回到问题 InputManagerService 输入服务
设备添加的流程

EventHub.cpp
status_t EventHub::openDeviceLocked(const char* devicePath) {
char buffer[80];// 'Q' key support = cheap test of whether this is an alpha-capable kbd

if (hasKeycodeLocked(device, AKEYCODE_Q)) {//xuanyutag 外接键盘设备标识
device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY;
}

InputReader.cpp
if (classes & INPUT_DEVICE_CLASS_ALPHAKEY) { INPUT_DEVICE_CLASS_ALPHAKEY =2
keyboardType = AINPUT_KEYBOARD_TYPE_ALPHABETIC; =2 也就是外接键盘
}

再看看上层怎么处理这个class

InputManagerService
// Must be called on handler.
private void deliverInputDevicesChanged(InputDevice[] oldInputDevices) {
if (!inputDevice.isVirtual() && inputDevice.isFullKeyboard()) {
Log.d("cxyi","notifyInputDevicesChanged 5.2 inputDevice="+inputDevice.getId()+"add in mTempFullKeyboards");
if (!containsInputDeviceWithDescriptor(oldInputDevices,
inputDevice.getDescriptor())) {
mTempFullKeyboards.add(numFullKeyboardsAdded++, inputDevice);
} else {
mTempFullKeyboards.add(inputDevice);
}
}

public boolean isFullKeyboard() {
return (mSources & SOURCE_KEYBOARD) == SOURCE_KEYBOARD
&& mKeyboardType == KEYBOARD_TYPE_ALPHABETIC;
}

接着会从mTempFullKeyboards 里面拿id 根据vid pid去找对应的键盘布局，找不到那就弹框提示你配置键盘

问题就这么找到了。是设备带了这个属性导致系统认为是输入设备，而又找不到对应的布局