我是这样做的，但只有当你的目标是关闭/打开键盘时，它才有意义。

关闭示例:(检查键盘是否已经关闭，如果没有关闭)

imm.showSoftInput(etSearch, InputMethodManager.HIDE_IMPLICIT_ONLY, new ResultReceiver(null) {
                    @Override
                    protected void onReceiveResult(int resultCode, Bundle resultData) {
                        super.onReceiveResult(resultCode, resultData);
                        if (resultCode != InputMethodManager.RESULT_UNCHANGED_HIDDEN)
                            imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
                    }
                });

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。

一个基于@bohdan-oliynyk答案的更紧凑的Kotlin版本

private const val KEYBOARD_VISIBLE_THRESHOLD_DP = 100

fun Activity.isKeyboardOpen(): Boolean {
    fun convertDpToPx(value: Int): Int =
        (value * Resources.getSystem().displayMetrics.density).toInt()

    val rootView = findViewById<View>(android.R.id.content)
    val visibleThreshold = Rect()
    rootView.getWindowVisibleDisplayFrame(visibleThreshold)
    val heightDiff = rootView.height - visibleThreshold.height()

    val accessibleValue = convertDpToPx(KEYBOARD_VISIBLE_THRESHOLD_DP)

    return heightDiff > accessibleValue
}

fun Activity.isKeyboardClosed(): Boolean {
    return isKeyboardOpen().not()
}

谢谢大家的回答，我是根据自己的情况想出来的

/**
 * Add global layout listener to observe system keyboard visibility
 */
private void initObserverForSystemKeyboardVisibility() {
    getRootView().getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            //Add your own code here
            Log.d("TEST_CODE", "isSystemKeyboardVisible:" + isSystemKeyboardVisible())
        }
    });
}


/**
 * Check system keyboard visibility
 * @return true if visible
 */
public boolean isSystemKeyboardVisible() {
    try {
        final InputMethodManager manager = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        final Method windowHeightMethod = InputMethodManager.class.getMethod("getInputMethodWindowVisibleHeight");
        final int height = (int) windowHeightMethod.invoke(manager);
        return height > 0;
    } catch (Exception e) {
        return false;
    }
}

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 }
            }
        })
    }

可以使用showSoftInput()和hideSoftInput()的回调结果来检查键盘的状态。完整的细节和示例代码在

https://rogerkeays.com/how-to-check-if-the-software-keyboard-is-shown-in-android