隐藏|显示事件键盘可以通过简单的hack在OnGlobalLayoutListener监听:

 final View activityRootView = findViewById(R.id.top_root);
        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();

                if (heightDiff > 100) {
                    // keyboard is up
                } else {
                    // keyboard is down
                }
            }
        });

这里activityRootView是Activity的根视图。

桑德，我相信你是想展示被软键盘挡住的视野。试试这个http://android-developers.blogspot.com/2009/04/updating-applications-for-on-screen.html。

你也可以检查第一个DecorView的子底部填充。当键盘显示时，它将被设置为非零值。

@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    View view = getRootView();
    if (view != null && (view = ((ViewGroup) view).getChildAt(0)) != null) {
        setKeyboardVisible(view.getPaddingBottom() > 0);
    }
    super.onLayout(changed, left, top, right, bottom);
}

隐藏|显示事件键盘可以通过简单的hack在OnGlobalLayoutListener监听:

 final View activityRootView = findViewById(R.id.top_root);
        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();

                if (heightDiff > 100) {
                    // keyboard is up
                } else {
                    // keyboard is down
                }
            }
        });

这里activityRootView是Activity的根视图。

基于Nebojsa Tomcic的代码，我开发了以下relativelayout子类:

import java.util.ArrayList;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

public class KeyboardDetectorRelativeLayout extends RelativeLayout {

    public interface IKeyboardChanged {
        void onKeyboardShown();
        void onKeyboardHidden();
    }

    private ArrayList<IKeyboardChanged> keyboardListener = new ArrayList<IKeyboardChanged>();

    public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public KeyboardDetectorRelativeLayout(Context context) {
        super(context);
    }

    public void addKeyboardStateChangedListener(IKeyboardChanged listener) {
        keyboardListener.add(listener);
    }

    public void removeKeyboardStateChangedListener(IKeyboardChanged listener) {
        keyboardListener.remove(listener);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
        final int actualHeight = getHeight();

        if (actualHeight > proposedheight) {
            notifyKeyboardShown();
        } else if (actualHeight < proposedheight) {
            notifyKeyboardHidden();
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    private void notifyKeyboardHidden() {
        for (IKeyboardChanged listener : keyboardListener) {
            listener.onKeyboardHidden();
        }
    }

    private void notifyKeyboardShown() {
        for (IKeyboardChanged listener : keyboardListener) {
            listener.onKeyboardShown();
        }
    }

}

这工作得很好… 注意，当你的活动的软输入模式设置为" windowmanager . layoutparm . soft_input_adjust_resize "时，这个解决方案才会工作

使用viewTreeObserver轻松获取键盘事件。

layout_parent.viewTreeObserver.addOnGlobalLayoutListener {
            val r = Rect()
            layout_parent.getWindowVisibleDisplayFrame(r)
            if (layout_parent.rootView.height - (r.bottom - r.top) > 100) { // if more than 100 pixels, its probably a keyboard...
                Log.e("TAG:", "keyboard open")
            } else {
                Log.e("TAG:", "keyboard close")
            }
        }

** layout_parent是你的视图，比如edit_text.parent