如何通过编程检测chromebook模式

Question

这个问题是#3 的一部分

有些Chromebook是笔记本电脑，我们也可以将其转换为平板电脑模式。查看此处的图像

所以我的问题是如何通过编程检测Chromebook的模式(笔记本电脑或平板电脑(。为此，我这样做了，但这只适用于联想Flex11，在其他Chromebook中它不适用于

context.getResources().getConfiguration().hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES;

如果此条件返回true，则意味着Chromebook处于平板电脑模式，否则处于笔记本电脑模式

我需要检查一下，因为如果Chromebook处于笔记本电脑模式，我必须只在特定的"活动"中显示预测栏。如果处于平板电脑模式，则会出现软键盘，预测栏由InputMethodService的候选视图管理

Answer 1

我们使用两种不同事物的组合。首先，我们使用以下代码片段检测设备是否处于桌面模式：

fun isDesktopMode() : Boolean {
var hasMouse = false
val hasKeyboard = resources.configuration.keyboard == KEYBOARD_QWERTY
val isKeyboardUseable = resources.configuration.hardKeyboardHidden == HARDKEYBOARDHIDDEN_NO
// Check each input device to see if it is a mouse
val inputManager = getSystemService(Context.INPUT_SERVICE) as InputManager
for (deviceId in inputManager.inputDeviceIds) {
val sourceMask = inputManager.getInputDevice(deviceId).sources
if ((sourceMask or SOURCE_MOUSE == sourceMask) ||
(sourceMask or SOURCE_TOUCHPAD == sourceMask) ||
(sourceMask or SOURCE_TRACKBALL == sourceMask)) {
hasMouse = true
}
}
return hasMouse && hasKeyboard && isKeyboardUseable
}

为了检测键盘是否已插入和/或可用，我们使用以下侦听器来侦听键盘是否已激活：

val inputManager = getSystemService(Context.INPUT_SERVICE) as InputManager
val inputDeviceListener = object: InputManager.InputDeviceListener {
override fun onInputDeviceRemoved(deviceId: Int) {
// Be careful checking device here as it is no longer attached to the system
}
override fun onInputDeviceAdded(deviceId: Int) {
// If you want to learn more about what has been attached, check the InputDevice
// using the id.
val sourceMask = inputManager.getInputDevice(deviceId).sources
if (sourceMask or SOURCE_KEYBOARD == sourceMask) {
//Keyboard has been Added
append_to_log("A keyboard has been added.")
}
}
override fun onInputDeviceChanged(deviceId: Int) {
// Best practice is to check for what you care about when things change (ie. are
// there any keyboards/mice still attached and usable. Users may have multiple
// devices attached (integrated keyboard a and bluetooth keyboard) and
// removing one does not mean the other is no longer available.
isInDesktopMode = isDesktopMode()
}
}
inputManager.registerInputDeviceListener(inputDeviceListener, null)

这篇文章是在Apache 2.0下授权的。

https://developers.google.com/open-source/devplat