Android 浮动编辑框的具体实现代码

ViewTreeObserver.OnGlobalLayoutListener layoutListener =        new ViewTreeObserver.OnGlobalLayoutListener() {      int mScreenHeight = 0;      int mKeyboardHeight = 0;      @Override      public void onGlobalLayout() {        Rect rect = new Rect();        // 测量当前窗口的显示区域        ((Activity)getContext()).getWindow().getDecorView()            .getWindowVisibleDisplayFrame(rect);        if(mScreenHeight <= 0){          mScreenHeight = ((WindowManager) getContext()              .getSystemService(Context.WINDOW_SERVICE))              .getDefaultDisplay().getHeight();        }        //计算出软键盘的高度        int keyboardHeight = mScreenHeight - rect.bottom;        //如果keyboardHeight大于屏幕的五分之一，        // 此时keyboardHeight有效，反之就是软键盘已经关闭了。        if (Math.abs(keyboardHeight) > mScreenHeight / 5) {          mKeyboardHeight = keyboardHeight;        }      }    }