Android 监听键盘的关闭和打开

自定义的类import android.graphics.Rect;import android.view.View;import android.view.ViewTreeObserver;import java.util.LinkedList;import java.util.List;/** * sjw * 2016/5/18 * 13:31 */public class SoftKeyboardStateHelper implements ViewTreeObserver.OnGlobalLayoutListener {    public interface SoftKeyboardStateListener {        void onSoftKeyboardOpened(int keyboardHeightInPx);        void onSoftKeyboardClosed();    }    private final List<SoftKeyboardStateListener> listeners = new LinkedList<SoftKeyboardStateListener>();    private final View activityRootView;    private int        lastSoftKeyboardHeightInPx;    private boolean    isSoftKeyboardOpened;    public SoftKeyboardStateHelper(View activityRootView) {        this(activityRootView, false);    }    public SoftKeyboardStateHelper(View activityRootView, boolean isSoftKeyboardOpened) {        this.activityRootView     = activityRootView;        this.isSoftKeyboardOpened = isSoftKeyboardOpened;        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);    }    @Override    public void onGlobalLayout() {        final Rect r = new Rect();        //r will be populated with the coordinates of your view that area still visible.        activityRootView.getWindowVisibleDisplayFrame(r);        final int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);        if (!isSoftKeyboardOpened && heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...            isSoftKeyboardOpened = true;            notifyOnSoftKeyboardOpened(heightDiff);        } else if (isSoftKeyboardOpened && heightDiff < 100) {            isSoftKeyboardOpened = false;            notifyOnSoftKeyboardClosed();        }    }    public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) {        this.isSoftKeyboardOpened = isSoftKeyboardOpened;    }    public boolean isSoftKeyboardOpened() {        return isSoftKeyboardOpened;    }    /**     * Default value is zero (0)     * @return last saved keyboard height in px     */    public int getLastSoftKeyboardHeightInPx() {        return lastSoftKeyboardHeightInPx;    }    public void addSoftKeyboardStateListener(SoftKeyboardStateListener listener) {        listeners.add(listener);    }    public void removeSoftKeyboardStateListener(SoftKeyboardStateListener listener) {        listeners.remove(listener);    }    private void notifyOnSoftKeyboardOpened(int keyboardHeightInPx) {        this.lastSoftKeyboardHeightInPx = keyboardHeightInPx;        for (SoftKeyboardStateListener listener : listeners) {            if (listener != null) {                listener.onSoftKeyboardOpened(keyboardHeightInPx);            }        }    }    private void notifyOnSoftKeyboardClosed() {        for (SoftKeyboardStateListener listener : listeners) {            if (listener != null) {                listener.onSoftKeyboardClosed();            }        }    }}在监听的地方final SoftKeyboardStateHelper softKeyboardStateHelper = new SoftKeyboardStateHelper(view);//这里的view是整个界面的ViewsoftKeyboardStateHelper.addSoftKeyboardStateListener(new SoftKeyboardStateHelper.SoftKeyboardStateListener() {            @Override            public void onSoftKeyboardOpened(int keyboardHeightInPx) {                //打开键盘                            }            @Override            public void onSoftKeyboardClosed() {                //隐藏键盘                            }        });