if (keyopen())
{
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY,0);            
}

上面的函数是我用来检查键盘是否可见的。如果是，那我就关上。

下面显示了所需的两种方法。

首先，在onCreate中定义可工作的窗口高度。

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

//  add to onCreate method
    Rect rectgle= new Rect();
    Window window= getWindow();
    window.getDecorView().getWindowVisibleDisplayFrame(rectgle);
    sheight= rectgle.bottom;
//

} 

然后，添加一个布尔方法来获取该实例的窗口高度。如果它与原来的不匹配(假设您没有在此过程中更改它……)，那么键盘是打开的。

public boolean keyopen()
{
    Rect rectgle= new Rect();
    Window window= getWindow();
    window.getDecorView().getWindowVisibleDisplayFrame(rectgle);
    int curheight= rectgle.bottom;

    if (curheight!=sheight)
    {
        return true;
    }
    else
    {
        return false;
    }
}

Frotz !

而不是假设差异编码，我做了这样的事情，因为我在我的应用程序中有菜单选项。

final View root= findViewById(R.id.myrootview); 
root.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
    public void onGlobalLayout() {
        int heightDiff = root.getRootView().getHeight() - root.getHeight();

        Rect rectgle= new Rect();
        Window window= getWindow();
        window.getDecorView().getWindowVisibleDisplayFrame(rectgle);
        int contentViewTop=                     
          window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
        if(heightDiff <= contentViewTop){
            //Soft KeyBoard Hidden
        }else{
            //Soft KeyBoard Shown
        }
     }
});

我的答案基本上与Kachi的答案相同，但我将它包装到一个很好的helper类中，以清理它在整个应用程序中的使用方式。

import android.app.Activity;
import android.app.Fragment;
import android.graphics.Rect;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;

/**
 * Detects Keyboard Status changes and fires events only once for each change
 */
public class KeyboardStatusDetector {
    KeyboardVisibilityListener visibilityListener;

    boolean keyboardVisible = false;

    public void registerFragment(Fragment f) {
        registerView(f.getView());
    }

    public void registerActivity(Activity a) {
        registerView(a.getWindow().getDecorView().findViewById(android.R.id.content));
    }

    public KeyboardStatusDetector registerView(final View v) {
        v.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect r = new Rect();
                v.getWindowVisibleDisplayFrame(r);

                int heightDiff = v.getRootView().getHeight() - (r.bottom - r.top);
                if (heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
                    /** Check this variable to debounce layout events */
                    if(!keyboardVisible) {
                        keyboardVisible = true;
                        if(visibilityListener != null) visibilityListener.onVisibilityChanged(true);
                    }
                } else {
                    if(keyboardVisible) {
                        keyboardVisible = false;
                        if(visibilityListener != null) visibilityListener.onVisibilityChanged(false);
                    }
                }
            }
        });

        return this;
    }

    public KeyboardStatusDetector setVisibilityListener(KeyboardVisibilityListener listener) {
        visibilityListener = listener;
        return this;
    }

    public static interface KeyboardVisibilityListener {
        public void onVisibilityChanged(boolean keyboardVisible);
    }
}

你可以使用它来检测整个应用程序中的键盘变化，如下所示:

    new KeyboardStatusDetector()
            .registerFragment(fragment)  //register to a fragment 
            .registerActivity(activity)  //or register to an activity
            .registerView(view)          //or register to a view
            .setVisibilityListener(new KeyboardVisibilityListener() {
                @Override
                public void onVisibilityChanged(boolean keyboardVisible) {
                    if(keyboardVisible) {
                       //Do stuff for keyboard visible
                    }else {
                       //Do stuff for keyboard hidden
                    }
                }
            });

注意:只使用一个“寄存器”调用。它们都是一样的，只是为了方便

你可以试试这个，对我来说很管用:

InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);

if (imm.isAcceptingText()) {
    //Software Keyboard was shown..
} else {
    //Software Keyboard was not shown..
}

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
    }
 }
}); 

就计算机而言，这是永远的问题，但这个问题仍然令人难以置信地相关!

所以我把上面的答案结合起来，做了一些改进……

public interface OnKeyboardVisibilityListener {


    void onVisibilityChanged(boolean visible);
}

public final void setKeyboardListener(final OnKeyboardVisibilityListener listener) {
    final View activityRootView = ((ViewGroup) getActivity().findViewById(android.R.id.content)).getChildAt(0);

    activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

        private boolean wasOpened;

        private final int DefaultKeyboardDP = 100;

        // From @nathanielwolf answer...  Lollipop includes button bar in the root. Add height of button bar (48dp) to maxDiff
        private final int EstimatedKeyboardDP = DefaultKeyboardDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);

        private final Rect r = new Rect();

        @Override
        public void onGlobalLayout() {
            // Convert the dp to pixels.
            int estimatedKeyboardHeight = (int) TypedValue
                    .applyDimension(TypedValue.COMPLEX_UNIT_DIP, EstimatedKeyboardDP, activityRootView.getResources().getDisplayMetrics());

            // Conclude whether the keyboard is shown or not.
            activityRootView.getWindowVisibleDisplayFrame(r);
            int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
            boolean isShown = heightDiff >= estimatedKeyboardHeight;

            if (isShown == wasOpened) {
                Log.d("Keyboard state", "Ignoring global layout change...");
                return;
            }

            wasOpened = isShown;
            listener.onVisibilityChanged(isShown);
        }
    });
}

对我有用:)

注意: 如果你注意到DefaultKeyboardDP不适合你的设备播放的值，并发表评论，让每个人都知道应该是什么值…最终我们将得到适合所有设备的正确值!

要了解更多细节，请查看Cyborg上的实现