Android系统中是否有一种方法可以检测软件(也就是Android。“软”)键盘在屏幕上可见吗?
当前回答
你可以在androidx上使用WindowInsetsCompat。Core(版本1.5.0-rc01)。 此代码将从API 21及以上版本工作。Kotlin代码示例:
ViewCompat.setOnApplyWindowInsetsListener(root) { v, insets ->
val isKeyboardVisible = insets.isVisible(WindowInsetsCompat.Type.ime())
if (isKeyboardVisible) {
}
}
root是Activity的根视图。
更新
今天我正在寻找如何检测键盘可见性。起初,这个代码不起作用。所以我不得不:
添加android:windowSoftInputMode=" adjuststresize "到我的AndroidManifest.xml文件:
xml
<activity android:name="com.soumicslabs.activitykt.StartActivity"
android:theme="@style/AccountKitTheme.Default"
android:configChanges="orientation|screenSize"
android:screenOrientation="portrait"
android:windowSoftInputMode="adjustResize"
/>
在您的活动中,设置WindowCompat。setDecorFitsSystemWindows(window, false),这告诉android我们想手动处理的东西/不想使用系统默认值:
val window = this.window
WindowCompat.setDecorFitsSystemWindows(window, false) // <-- this tells android not to use system defaults, so we have to setup quite a lot of behaviors manually
最后,设置你的onApplyWindowInsetsListener:
val callBack = OnApplyWindowInsetsListener { view, insets ->
val imeHeight = insets?.getInsets(WindowInsetsCompat.Type.ime())?.bottom?:0
Log.e("tag", "onKeyboardOpenOrClose imeHeight = $imeHeight")
// todo: logic
val isKeyboardVisible = insets.isVisible(WindowInsetsCompat.Type.ime())
if (isKeyboardVisible) {
// do something
}else{
// do something else
}
insets?: WindowInsetsCompat(null)
}
ViewCompat.setOnApplyWindowInsetsListener(mainContainer, callBack)
这对我很管用。
其他回答
我也遇到过类似的问题。我需要对屏幕上的Enter按钮做出反应(这隐藏了键盘)。在这种情况下,你可以订阅键盘打开的文本视图的OnEditorAction -如果你有多个可编辑框,那么就订阅所有的文本视图。
在你的活动中,你可以完全控制键盘,所以如果你监听所有打开和关闭事件,你就不会面临键盘是否打开的问题。
你可以参考这个答案- https://stackoverflow.com/a/24105062/3629912
每次都很管用。
adb shell dumpsys window InputMethod | grep "mHasSurface"
如果软件键盘可见,它将返回true。
这是如何在一个片段中使用软键盘状态监听器(适用于API 21及以上)
private var currentWindowInsets: WindowInsetsCompat = WindowInsetsCompat.Builder().build()
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setWindowInsetsAnimationCallback(requireView().rootView, object : Callback(DISPATCH_MODE_CONTINUE_ON_SUBTREE) {
override fun onProgress(insets: WindowInsetsCompat, runningAnimations: MutableList<WindowInsetsAnimationCompat>): WindowInsetsCompat {
currentWindowInsets = insets
return insets
}
override fun onEnd(animation: WindowInsetsAnimationCompat) {
super.onEnd(animation)
val keyboardIsVisible = currentWindowInsets.isVisible(WindowInsetsCompat.Type.ime())
if (keyboardIsVisible) { //do your stuff }
}
})
}
它使用活动的adjustNothing标志和使用生命周期事件。还有Kotlin:
/**
* This class uses a PopupWindow to calculate the window height when the floating keyboard is opened and closed
*
* @param activity The parent activity
* The root activity that uses this KeyboardManager
*/
class KeyboardManager(private val activity: AppCompatActivity) : PopupWindow(activity), LifecycleObserver {
private var observerList = mutableListOf<((keyboardTop: Int) -> Unit)>()
/** The last value of keyboardTop */
private var keyboardTop: Int = 0
/** The view that is used to calculate the keyboard top */
private val popupView: View?
/** The parent view */
private var parentView: View
var isKeyboardShown = false
private set
/**
* Create transparent view which will be stretched over to the full screen
*/
private fun createFullScreenView(): View {
val view = LinearLayout(activity)
view.layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT)
view.background = ColorDrawable(Color.TRANSPARENT)
return view
}
init {
this.popupView = createFullScreenView()
contentView = popupView
softInputMode = LayoutParams.SOFT_INPUT_ADJUST_RESIZE or LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE
inputMethodMode = INPUT_METHOD_NEEDED
parentView = activity.findViewById(android.R.id.content)
width = 0
height = LayoutParams.MATCH_PARENT
popupView.viewTreeObserver.addOnGlobalLayoutListener {
val rect = Rect()
popupView.getWindowVisibleDisplayFrame(rect)
val keyboardTop = rect.bottom
if (this.keyboardTop != keyboardTop) {
isKeyboardShown = keyboardTop < this.keyboardTop
this.keyboardTop = keyboardTop
observerList.forEach { it(keyboardTop) }
}
}
activity.lifecycle.addObserver(this)
}
/**
* This must be called after the onResume of the Activity or inside view.post { } .
* PopupWindows are not allowed to be registered before the onResume has finished
* of the Activity
*/
@OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
fun start() {
parentView.post {
if (!isShowing && parentView.windowToken != null) {
setBackgroundDrawable(ColorDrawable(0))
showAtLocation(parentView, Gravity.NO_GRAVITY, 0, 0)
}
}
}
/**
* This manager will not be used anymore
*/
@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
fun close() {
activity.lifecycle.removeObserver(this)
observerList.clear()
dismiss()
}
/**
* Set the keyboard top observer. The observer will be notified when the keyboard top has changed.
* For example when the keyboard is opened or closed
*
* @param observer The observer to be added to this provider
*/
fun registerKeyboardTopObserver(observer: (keyboardTop: Int) -> Unit) {
observerList.add(observer)
}
}
有用的方法,保持视图始终高于键盘
fun KeyboardManager.updateBottomMarginIfKeyboardShown(
view: View,
activity: AppCompatActivity,
// marginBottom of view when keyboard is hide
marginBottomHideKeyboard: Int,
// marginBottom of view when keybouard is shown
marginBottomShowKeyboard: Int
) {
registerKeyboardTopObserver { bottomKeyboard ->
val bottomView = ViewUtils.getFullViewBounds(view).bottom
val maxHeight = ScreenUtils.getFullScreenSize(activity.windowManager).y
// Check that view is within the window size
if (bottomView < maxHeight) {
if (bottomKeyboard < bottomView) {
ViewUtils.updateMargin(view, bottomMargin = bottomView - bottomKeyboard +
view.marginBottom + marginBottomShowKeyboard)
} else ViewUtils.updateMargin(view, bottomMargin = marginBottomHideKeyboard)
}
}
}
在getFullViewBounds
fun getLocationOnScreen(view: View): Point {
val location = IntArray(2)
view.getLocationOnScreen(location)
return Point(location[0], location[1])
}
fun getFullViewBounds(view: View): Rect {
val location = getLocationOnScreen(view)
return Rect(location.x, location.y, location.x + view.width,
location.y + view.height)
}
在getFullScreenSize
fun getFullScreenSize(wm: WindowManager? = null) =
getScreenSize(wm) { getRealSize(it) }
private fun getScreenSize(wm: WindowManager? = null, block: Display.(Point) -> Unit): Point {
val windowManager = wm ?: App.INSTANCE.getSystemService(Context.WINDOW_SERVICE)
as WindowManager
val point = Point()
windowManager.defaultDisplay.block(point)
return point
}
其中更新边距
fun updateMargin(
view: View,
leftMargin: Int? = null,
topMargin: Int? = null,
rightMargin: Int? = null,
bottomMargin: Int? = null
) {
val layoutParams = view.layoutParams as ViewGroup.MarginLayoutParams
if (leftMargin != null) layoutParams.leftMargin = leftMargin
if (topMargin != null) layoutParams.topMargin = topMargin
if (rightMargin != null) layoutParams.rightMargin = rightMargin
if (bottomMargin != null) layoutParams.bottomMargin = bottomMargin
view.layoutParams = layoutParams
}
使用androidx核心版本1.5.0-alpha02中的新特性WindowInsetsCompat,您可以轻松地检查软键盘的可见性,如下所示
摘自reddit评论
瓦尔View)。布尔keyboardIsVisible: 赢了 toWindowInsetsCompat (rootWindowInsets)。 isVisible (WindowInsetsCompat。。火车(型)
一些关于向后兼容性的说明,引用自发行说明
新功能 windowswinsetscompat api已经更新为平台中的api Android 11。这包括新的ime()插入类型,它允许 检查屏幕上键盘的可见性和大小。 一些关于ime()类型的警告,它在API 23+上工作非常可靠 当你的Activity使用adjuststresize窗口软输入模式时。 如果您使用的是adjustPan模式,它应该工作可靠 回到API 14。
参考文献
Twitter WindowInsetsCompat公告 Reddit的线程 Androidx Core 1.5.0-alpha02发布说明 WindowInsetsCompat文档
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