code: private void fixContentLayoutHeight(final int oldH, final int newH) {
          postDelayed(new Runnable() {
              @Override
              public void run() {
                  LayoutParams params = (LayoutParams) mContentLayout.getLayoutParams();
                  params.height = newH;
                  params.weight = 0;
                  requestLayout();
                  unlockContentLayoutHeight();
              }
          }, 100);
      }
docs: 修改第一次打开表情之前, 键盘没有弹出之前的BUG.