Android -- 获取网络数据并将数据存到本地数据库中

Posted 2020-08-26 ⬆️小马哥⬆️

public static final int downloadDone = 1;

 // 用户model数组
    ArrayList<Loginer> loginers = new ArrayList<>();
    // hander
    Handler downloadLoginerHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what){
                case downloadDone:
                    Toast.makeText(MyApplication.getApplication(), "同步用户数据成功", Toast.LENGTH_SHORT).show();
                    break;
            }
            super.handleMessage(msg);
        }
    };

    // 从服务器更新loginer数据
    public  void downloadData() throws IOException, XmlPullParserException {
        new Thread(new Runnable() {
            @Override
            public void run() {
                String url = "http://222.169.11.226:7000/WebServiceandroidcm.asmx/getloginerInfo";
                MyHTTP myHTTP = new MyHTTP();
                Map map = new HashMap();
                map.put("pw", "0535deer");
                try {
                    String string = myHTTP.doPost(url, map);
                    System.out.println("成功::::"+string);
                    String newString = string.replace("<?xml version=\\"1.0\\" encoding=\\"utf-8\\"?><string xmlns=\\"http://tempuri.org/\\">{\\"Result\\":\\"1\\",\\"Value\\":", "");
                    String lastString = newString.replace("}</string>", "");
                    // 将字符串进行解析
                    JsonParser jsonParser = new JsonParser();
                    // 将jsonstring转换为jaonArray
                    JsonArray jsonArray = jsonParser.parse(lastString).getAsJsonArray();
                    // gson
                    Gson gson = new Gson();
                    // for 循环遍历josnarray
                    for (JsonElement loginerElement : jsonArray) {
                        Loginer loginer = gson.fromJson(loginerElement, Loginer.class);
                        loginers.add(loginer);
                        System.out.println("大小是"+loginers.size());
                    }
                    // 获取dao对象
                    loginerDao = MyApplication.getApplication().getDaoSession().getLoginerDao();
                    // 新建一个Message对象
                    Message msg = new Message();
                   // 通过for循环插入数据到数据库
                    for (int i = 0; i < loginers.size(); i++) {
                        System.out.println("终于找到你:"+loginers.get(i).getLoginer_code());
                        long result = loginerDao.insertOrReplace(loginers.get(i));
                        System.out.println("结果是:"+result);
                        // 如果全部替换或插入成功, 则弹出更新用户数据成功
                        if (result == loginers.get(loginers.size() - 1).getLoginer_id()) {
                            // 发送同步完成的消息到message
                            msg.what = downloadDone;
                            downloadLoginerHandler.sendMessage(msg);
                            System.out.println("到最后一条了");

                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

调用:

// 开始更新loginers数据的数据
                try {
                    downloadData();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (XmlPullParserException e) {
                    e.printStackTrace();
                }

 

截图: