Java BmobQuery.setMaxCacheAge方法代码示例

import cn.bmob.v3.BmobQuery; //导入方法依赖的package包/类
private void generateDatas() {
    String currentUserNameStr = (String) BmobUser.getObjectByKey("username");
    Log.i(TAG, "currentUserNameStr >> " + currentUserNameStr);

    BmobQuery<NotesBean> query1 = new BmobQuery<>();
    query1.addWhereLessThanOrEqualTo("createdAt", new BmobDate(new Date()));

    BmobQuery<NotesBean> query2 = new BmobQuery<>();
    query2.addWhereEqualTo("userNameStr", currentUserNameStr);

    List<BmobQuery<NotesBean>> andQuerys = new ArrayList<>();
    andQuerys.add(query1);
    andQuerys.add(query2);

    BmobQuery<NotesBean> notesInfoBmobQuery = new BmobQuery<>();
    notesInfoBmobQuery.and(andQuerys);
    notesInfoBmobQuery.order("-createdAt");  // 按时间降序排列
    // 设定查询缓存策略-CACHE_ELSE_NETWORK: 先从缓存读取数据, 如果没有, 再从网络获取.
    notesInfoBmobQuery.setCachePolicy(BmobQuery.CachePolicy.CACHE_ELSE_NETWORK);
    notesInfoBmobQuery.setMaxCacheAge(TimeUnit.DAYS.toMillis(7));    //此表示缓存一天
    notesInfoBmobQuery.findObjects(new FindListener<NotesBean>() {
        @Override
        public void done(List<NotesBean> list, BmobException e) {
            if (!list.isEmpty()) {
                for (NotesBean notesBean : list) {
                    mDatas.add(notesBean);
                }

                if (!mDatas.isEmpty()) {
                    mMaterialDialog.dismiss();
                    mFindNotesAdapter.notifyDataSetChanged();
                }
            } else {
                mMaterialDialog.dismiss();
                Toast.makeText(FindNotesAty.this, "暂无数据", Toast.LENGTH_SHORT).show();
            }
        }
    });
}
 

import cn.bmob.v3.BmobQuery; //导入方法依赖的package包/类
/**
 * 获取数据：获取云端最近时间内的5条数据
 */
private void generateData() {
    Log.i("LOG", "mDate in generateData >>> " + mDate);
    BmobQuery<ComUserPostInfo> postInfoBmobQuery = new BmobQuery<ComUserPostInfo>();
    postInfoBmobQuery.addWhereLessThanOrEqualTo("createdAt", new BmobDate(mDate));
    postInfoBmobQuery.order("-createdAt");  // 按时间降序排列
    postInfoBmobQuery.setLimit(QUERY_ITEM_LIMITS);  // 设定返回的查询条数
    // 设定查询缓存策略-CACHE_ELSE_NETWORK: 先从缓存读取数据, 如果没有, 再从网络获取.
    postInfoBmobQuery.setCachePolicy(BmobQuery.CachePolicy.CACHE_ELSE_NETWORK);
    postInfoBmobQuery.setMaxCacheAge(TimeUnit.DAYS.toMillis(7));    //此表示缓存一天
    postInfoBmobQuery.findObjects(new FindListener<ComUserPostInfo>() {
        @Override
        public void done(List<ComUserPostInfo> list, BmobException e) {
            if (e == null) {
                mNoDataTv.setVisibility(View.GONE);
                for (ComUserPostInfo comUserPostInfo : list) {
                    mList.add(comUserPostInfo);
                }

                // get the last item post time
                if (!mList.isEmpty()) {
                    mComAppAdapter = new ComAppAdapter(getActivity());
                    mComAppAdapter.setData(mList);
                    mListView.setAdapter(mComAppAdapter);

                    ComUserPostInfo lastPostInfo = mList.get(mList.size() - 1);
                    Log.i("LOG", "lastPostInfo.getUserTimeStr() in generateData " +
                            lastPostInfo.getUserTimeStr());
                    lastItemPostTimeStr = lastPostInfo.getUserTimeStr();
                } else {
                    mNoDataTv.setText("暂无数据!");
                    mNoDataTv.setVisibility(View.VISIBLE);
                }

                mProgressBar.setVisibility(ProgressBar.GONE);
            } else {
                mProgressBar.setVisibility(ProgressBar.GONE);
                mNoDataTv.setText("加载数据出错");
                mNoDataTv.setVisibility(View.VISIBLE);
            }
        }
    });
}
 

import cn.bmob.v3.BmobQuery; //导入方法依赖的package包/类
/**
 * 下拉刷新数据：获取云端最近时间内的5条数据
 * 思路：记录第一次加载应用或下拉刷新的时间，
 * 取第二次或之后下拉刷新的时间这一段时间内的数据；
 * 从Bmob云端进行复合查询
 */
private void generateRefleshData() {
    final List<ComUserPostInfo> tempList = new ArrayList<>();
    // 使用复合查询
    Log.i("LOG", "mDate in generateRefleshData query1 >>> " + mDate);
    BmobQuery<ComUserPostInfo> query1 = new BmobQuery<>();
    query1.addWhereGreaterThanOrEqualTo("createdAt", new BmobDate(mDate));

    mDate = new Date();     // 获取当前最新时间
    Log.i("LOG", "mDate in generateRefleshData query2 >>> " + mDate);
    BmobQuery<ComUserPostInfo> query2 = new BmobQuery<>();
    query2.addWhereLessThanOrEqualTo("createdAt", new BmobDate(mDate));

    List<BmobQuery<ComUserPostInfo>> andQuerys = new ArrayList<>();
    andQuerys.add(query1);
    andQuerys.add(query2);

    BmobQuery<ComUserPostInfo> postInfoBmobQuery = new BmobQuery<>();
    postInfoBmobQuery.and(andQuerys);
    postInfoBmobQuery.addWhereLessThanOrEqualTo("createdAt", new BmobDate(mDate));
    postInfoBmobQuery.order("-createdAt");  // 按时间降序排列
    postInfoBmobQuery.setLimit(QUERY_ITEM_LIMITS);  // 设定返回的查询条数
    // 设定查询缓存策略-NETWORK_ELSE_CACHE: 先从网络读取数据, 如果没有, 再从缓存获取.
    postInfoBmobQuery.setCachePolicy(BmobQuery.CachePolicy.NETWORK_ELSE_CACHE);
    postInfoBmobQuery.setMaxCacheAge(TimeUnit.DAYS.toMillis(7));    //此表示缓存一天
    postInfoBmobQuery.findObjects(new FindListener<ComUserPostInfo>() {
        @Override
        public void done(List<ComUserPostInfo> list, BmobException e) {
            if (e == null) {
                if (list.size() == 0) {
                    SystemUtils.showHandlerToast(getActivity(), "没有更多内容了...");
                    Log.i("LOG", "list.size() in generateRefleshData >>> " + list.size());
                } else {
                    for (ComUserPostInfo comUserPostInfo : list) {
                        tempList.add(comUserPostInfo);
                    }

                    // add and remove the same element
                    mList.addAll(0, tempList);
                    mList = SystemUtils.removeDuplicateData(mList);

                    mComAppAdapter = new ComAppAdapter(getActivity());
                    mComAppAdapter.setData(mList);
                    mListView.setAdapter(mComAppAdapter);
                }

                mProgressBar.setVisibility(ProgressBar.GONE);
            } else {
                mProgressBar.setVisibility(ProgressBar.GONE);
            }
        }
    });
}
 

import cn.bmob.v3.BmobQuery; //导入方法依赖的package包/类
/**
 * 上拉加载更多数据：获取云端最近时间内的5条数据
 * 思路：获取应用第一次打开时加载的数据的最后一个时间,
 * 上滑加载更多时, 数据取该日期之前的数据, 之后更新时间
 */
private void generateLoadMoreData() {
    // get last item post time
    Date newdate = DateUtil.string2Date(lastItemPostTimeStr);
    Log.i("LOG", "newdate in generateLoadMoreData >>> " + newdate);

    BmobQuery<ComUserPostInfo> postInfoBmobQuery = new BmobQuery<>();
    postInfoBmobQuery.addWhereLessThanOrEqualTo("createdAt", new BmobDate(newdate));
    postInfoBmobQuery.order("-createdAt");  // 按时间降序排列
    postInfoBmobQuery.setLimit(QUERY_ITEM_LIMITS);  // 设定返回的查询条数
    // 设定查询缓存策略-CACHE_ELSE_NETWORK: 先从网络读取数据, 如果没有, 再从缓存获取.
    postInfoBmobQuery.setCachePolicy(BmobQuery.CachePolicy.NETWORK_ELSE_CACHE);
    postInfoBmobQuery.setMaxCacheAge(TimeUnit.DAYS.toMillis(7));    //此表示缓存一天
    postInfoBmobQuery.findObjects(new FindListener<ComUserPostInfo>() {
        @Override
        public void done(List<ComUserPostInfo> list, BmobException e) {
            if (e == null) {
                if (list.size() == 0) {
                    SystemUtils.showHandlerToast(getActivity(), "没有更多内容了...");
                    Log.i("LOG", "list.size() in generateLoadMoreData >>> " + list.size());
                } else {
                    for (ComUserPostInfo comUserPostInfo : list) {
                        mList.add(comUserPostInfo);
                    }

                    // 监听数据的变化, 上拉加载更多后处于当前可视的最后一个item位置
                    mComAppAdapter.notifyDataSetChanged();

                    // get the last item post time
                    if (!mList.isEmpty()) {
                        ComUserPostInfo lastPostInfo = mList.get(mList.size() - 1);
                        Log.i("LOG", "lastPostInfo.getUserTimeStr() in generateLoadMoreData" +
                                lastPostInfo.getUserTimeStr());
                        lastItemPostTimeStr = lastPostInfo.getUserTimeStr();
                    }
                }

                mProgressBar.setVisibility(ProgressBar.GONE);
            } else {
                mProgressBar.setVisibility(ProgressBar.GONE);
            }
        }
    });
}