KeyBordStateUtil keyBordStateUtil=new KeyBordStateUtil(this);
keyBordStateUtil.addOnKeyBordStateListener(mOnKeyBordStateListener);
  
private KeyBordStateUtil.onKeyBordStateListener mOnKeyBordStateListener = new KeyBordStateUtil.onKeyBordStateListener() {

    @Override
    public void onSoftKeyBoardShow(int keyboardHeight) {
        textView.setText("键盘打开了-高度为:" + keyboardHeight);
    }

    @Override
    public void onSoftKeyBoardHide() {
        textView.setText("键盘关闭了");
    }
};

//释放,防止内存泄漏哦!
 @Override
    protected void onDestroy() {
        super.onDestroy();
        keyBordStateUtil.removeOnKeyBordStateListener();
    }