前几次更新有效但是到第四次左右就无效了不知道为什么，所有数据两百多条，只能加载出四五条。代码如下：

if (photoDAO!=null) {

                pojoList.add(photoDAO);
                titleCount.setText(String.valueOf(pojoList.size()));
                if (pojoList.size() <= 1) {
                    ScanAdapter scanAdapter = new ScanAdapter(Scan.this, pojoList, handler, CHECK_ALL_SUCCESS_FLAG);
                    gridView.setAdapter(scanAdapter);
                    allCheckBox.setOnClickListener(v -> {
                        gridView.setAdapter(scanAdapter.setChecked(allCheckBox.isChecked()));
                    });
                    LogUtil.debug("刷新适配器 size:"+pojoList.size());
                }else {
                    gridView.deferNotifyDataSetChanged();
                    LogUtil.debug("通知更新 size:"+pojoList.size());
                }
            }