Android精准的获取底部虚拟键盘的高度

/**
* 获取底部虚拟键盘的高度
*/
public int getBottomKeyboardHeight(){
int screenHeight =  getAccurateScreenDpi()[1];
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int heightDifference = screenHeight - dm.heightPixels;
return heightDifference;
}

/**
* 获取精确的屏幕大小
*/
public int[] getAccurateScreenDpi()
{
int[] screenWH = new int[2];
Display display = getWindowManager().getDefaultDisplay();
DisplayMetrics dm = new DisplayMetrics();
try {
Class<?> c = Class.forName("android.view.Display");
Method method = c.getMethod("getRealMetrics",DisplayMetrics.class);
method.invoke(display, dm);
screenWH[0] = dm.widthPixels;
screenWH[1] = dm.heightPixels;
}catch(Exception e){
e.printStackTrace();
}
return screenWH;
}