Android监听键盘打开或关闭

1.AndroidManifes 当前Activity下添加属性

 android:windowSoftInputMode="stateAlwaysHidden|adjustResize"

2.Oncreate调用

 private void listenKeyboard() {
        // TODO Auto-generated method stub
        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
        detailMainRL = (LinearLayout) findViewById(R.id.root_layout);
        detailMainRL.getViewTreeObserver().addOnGlobalLayoutListener(
                new ViewTreeObserver.OnGlobalLayoutListener(){
                    @Override
                    public void onGlobalLayout()
                    {
                        int heightDiff = detailMainRL.getRootView().getHeight() - detailMainRL.getHeight();
                        if (heightDiff > detailMainRL.getRootView().getHeight()/3)
                        { // 说明键盘是弹出状态
                            Toast.makeText(MainActivity.this, "open", Toast.LENGTH_SHORT).show();
                        } else{
                            Toast.makeText(MainActivity.this, "close", Toast.LENGTH_SHORT).show();
                        }
                    }
                });
    }

  注：detaiMainRL为根布局id

疑问：当布局中设置状态栏，导航栏时，获取键盘高度失效，有知道的大神，请解答下