我知道如何准确地确定键盘是否隐藏。

public int getStatusBarHeight() {
    int result = 0;
    int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}

public int getNavigationBarHeight() {
    int result = 0;
    int resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}

public boolean isKeyboardHidden() {
    int delta = mRootView.getRootView().getHeight() - mRootView.getHeight() - getNavigationBarHeight() - getStatusBarHeight()
            - getSupportActionBar().getHeight();
    return delta <= 0;
}

这适用于平板电脑。当导航栏水平显示时。

我认为这个方法将帮助你找出是键盘是可见的或不。

 public Boolean isSoftKeyBoardVisible(){
    InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);

    if (imm.isAcceptingText()) {
        Log.d(TAG,"Software Keyboard was shown");
        return true;
    } else {
        Log.d(TAG,"Software Keyboard was not shown");
        return false;
    }

}

这些解决方案都不适用于棒棒糖。在Lollipop activityRootView.getRootView(). getheight()包含按钮栏的高度，而测量视图则不包含。我已经采用了上面最好/最简单的解决方案来处理棒棒糖。

    final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    Rect r = new Rect();
    //r will be populated with the coordinates of your view that area still visible.
    activityRootView.getWindowVisibleDisplayFrame(r);

    int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
    Resources res = getResources();
    // The status bar is 25dp, use 50dp for assurance
    float maxDiff =
        TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, res.getDisplayMetrics());

    //Lollipop includes button bar in the root. Add height of button bar (48dp) to maxDiff
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      float buttonBarHeight =
          TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 48, res.getDisplayMetrics());
      maxDiff += buttonBarHeight;
    }
    if (heightDiff > maxDiff) { // if more than 100 pixels, its probably a keyboard...
      ...do something here
    }
  }
});

视图#setOnApplyWindowInsetsListener可以用来获得窗口insets回调

public void setOnApplyWindowInsetsListener(OnApplyWindowInsetsListener listener) {
    getListenerInfo().mOnApplyWindowInsetsListener = listener;
}

//OnApplyWindowInsetsListener
public WindowInsets onApplyWindowInsets(View v, WindowInsets insets);

boolean keyboardVisible = insets.isVisible(WindowInsets.Type.ime())可以给出可见性状态。

这个解决方案可能会重新打开键盘，但它是有效的。

InputMethodManager inputManager = ( (InputMethodManager) this.getSystemService(Context.INPUT_METHOD_SERVICE) );

private boolean isKeyboardShowing() {

    boolean isKeyboardShowing = inputManager.hideSoftInputFromWindow(irrelevantView.getWindowToken(), 0);
    if (isKeyboardShowing) {
        inputManager.showSoftInput(this.getCurrentFocus(), 0);
    }
    return isKeyboardShowing;
}

Reuben Scratton的新答案(计算HeightDiff int HeightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();)如果您设置半透明状态栏模式，将无法在活动中工作。

如果你使用半透明状态栏，activityRootView.getHeight()将永远不会改变软键盘是否可见。它将始终返回活动和状态栏的高度。

例如，Nexus 4, Android 5.0.1，将Android:windowTranslucentStatus设置为true，它将永远返回1184，即使ime已经打开。如果你设置android:windowTranslucentStatus为false，它将正确返回高度，如果ime不可见，它将返回1134(不包括状态栏)。关闭ime，它可能会返回5xx(取决于ime的高度)

我不知道这是否是一个bug，我已经尝试了4.4.4和5.0.1，结果是一样的。

所以，到目前为止，第二个最被认可的答案，Kachi的解决方案将是最安全的方法来计算ime的高度。以下是一份复印件:

final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new        OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect r = new Rect();
//r will be populated with the coordinates of your view that area still visible.
activityRootView.getWindowVisibleDisplayFrame(r);

int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
if (heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
    ... do something here
    }
 }
});