android开发：获取键盘的高度（实测真实有效）

由于最近在做即时通讯，做类似于微信的点击键盘消失，弹出表情页面（表情页面的高度和键盘的高度一致），于是在网上看了好多android测键盘高度的代码，都多多少少有些问题，于是我自己进行重新编写，终于弄了一个比较ok的测量高度的代码。

//一个静态变量存储高度public static int keyboardHeight = 0;    boolean isVisiableForLast = false;    ViewTreeObserver.OnGlobalLayoutListener onGlobalLayoutListener = null;    public void addOnSoftKeyBoardVisibleListener() {        getKeyboradHeight();        if(keyboardHeight>0){            return;        }        final View decorView = getWindow().getDecorView();        onGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {            @Override            public void onGlobalLayout() {                Rect rect = new Rect();                decorView.getWindowVisibleDisplayFrame(rect);                //计算出可见屏幕的高度                int displayHight = rect.bottom - rect.top;                //获得屏幕整体的高度                int hight = decorView.getHeight();                boolean visible = (double) displayHight / hight < 0.8;                int statusBarHeight = 0;                try {                    Class<?> c = Class.forName("com.android.internal.R$dimen");                    Object obj = c.newInstance();                    Field field = c.getField("status_bar_height");                    int x = Integer.parseInt(field.get(obj).toString());                    statusBarHeight = getContext().getResources().getDimensionPixelSize(x);                } catch (Exception e) {                    e.printStackTrace();                }                if(visible&&visible!= isVisiableForLast){                    //获得键盘高度                    keyboardHeight = hight - displayHight-statusBarHeight;                    Logger.sl(Log.DEBUG,"MMSL",keyboardHeight);                }                isVisiableForLast = visible;            }        };        decorView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);    }