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);
}