试试这段代码，它真的工作，如果keyboardshow是显示的，那么这个函数返回真值....

private final String TAG = "TextEditor";
private TextView mTextEditor;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_editor);
    mTextEditor = (TextView) findViewById(R.id.text_editor);
    mTextEditor.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            isKeyboardShown(mTextEditor.getRootView());
        }
    });
}

private boolean isKeyboardShown(View rootView) {
    /* 128dp = 32dp * 4, minimum button height 32dp and generic 4 rows soft keyboard */
    final int SOFT_KEYBOARD_HEIGHT_DP_THRESHOLD = 128;

    Rect r = new Rect();
    rootView.getWindowVisibleDisplayFrame(r);
    DisplayMetrics dm = rootView.getResources().getDisplayMetrics();
    /* heightDiff = rootView height - status bar height (r.top) - visible frame height (r.bottom - r.top) */
    int heightDiff = rootView.getBottom() - r.bottom;
    /* Threshold size: dp to pixels, multiply with display density */
    boolean isKeyboardShown = heightDiff > SOFT_KEYBOARD_HEIGHT_DP_THRESHOLD * dm.density;

    Log.d(TAG, "isKeyboardShown ? " + isKeyboardShown + ", heightDiff:" + heightDiff + ", density:" + dm.density
            + "root view height:" + rootView.getHeight() + ", rect:" + r);

    return isKeyboardShown;
}

没有直接的方法-请参阅http://groups.google.com/group/android-platform/browse_thread/thread/1728f26f2334c060/5e4910f0d9eb898a，来自Android团队的Dianne Hackborn已经回复。但是，您可以通过检查#onMeasure中窗口大小是否改变来间接检测它。参见如何检查软件键盘的可见性在Android?。

对于我所需要的需求来说，这要简单得多。希望这能有所帮助:

关于MainActivity:

public void dismissKeyboard(){
    InputMethodManager imm =(InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(mSearchBox.getWindowToken(), 0);
    mKeyboardStatus = false;
}

public void showKeyboard(){
    InputMethodManager imm =(InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
    mKeyboardStatus = true;
}

private boolean isKeyboardActive(){
    return mKeyboardStatus;
}

mKeyboardStatus的默认基元布尔值将初始化为false。

然后检查如下值，并执行相应的操作:

 mSearchBox.requestFocus();
    if(!isKeyboardActive()){
        showKeyboard();
    }else{
        dismissKeyboard();
    }

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。

final View activityRootView = findViewById(R.id.rootlayout);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {

            Rect r = new Rect();
            activityRootView.getWindowVisibleDisplayFrame(r);

            int screenHeight = activityRootView.getRootView().getHeight();
            Log.e("screenHeight", String.valueOf(screenHeight));
            int heightDiff = screenHeight - (r.bottom - r.top);
            Log.e("heightDiff", String.valueOf(heightDiff));
            boolean visible = heightDiff > screenHeight / 3;
            Log.e("visible", String.valueOf(visible));
            if (visible) {
                Toast.makeText(LabRegister.this, "I am here 1", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(LabRegister.this, "I am here 2", Toast.LENGTH_SHORT).show();
            }
        }
});

@iWantScala的回答很棒，但不适合我 rootView.getRootView().getHeight()总是有相同的值

一种方法是定义两个变量

private int maxRootViewHeight = 0;
private int currentRootViewHeight = 0;

添加全局监听器

rootView.getViewTreeObserver()
    .addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            currentRootViewHeight = rootView.getHeight();
            if (currentRootViewHeight > maxRootViewHeight) {
                maxRootViewHeight = currentRootViewHeight;
            }
        }
    });

然后检查

if (currentRootViewHeight >= maxRootViewHeight) {
    // Keyboard is hidden
} else {
    // Keyboard is shown
}

工作正常