微軟必應每天都會更新一張很美的圖片作為網站的背景，拿來做啟動頁背景也是美美噠。

1.準備工作

{
    "images": [
        {
            "startdate": "20170305",
            "fullstartdate": "201703051600",
            "enddate": "20170306",
            "url": "/az/hprichbg/rb/SteepSheep_ZH-CN8716398488_1920x1080.jpg",
            "urlbase": "/az/hprichbg/rb/SteepSheep_ZH-CN8716398488",
            "copyright": "瓦萊黑鼻羊，瑞士瓦萊州 (© Alessandra Meniconzi/Solent News/REX/Shutterstock)",
            "copyrightlink": "http://www.bing.com/search?q=%E9%BB%91%E9%BC%BB%E7%BE%8A&form=hpcapt&mkt=zh-cn",
            "quiz": "/search?q=Bing+homepage+quiz&filters=WQOskey:%22HPQuiz_20170305_SteepSheep%22&FORM=HPQUIZ",
            "wp": true,
            "hsh": "c737af458c5e07aa3fc472220d828ec9",
            "drk": 1,
            "top": 1,
            "bot": 1,
            "hs": []
        }
    ],
    "tooltips": {
        "loading": "正在載入...",
        "previous": "上一個影象",
        "next": "下一個影象",
        "walle": "此圖片不能下載用作桌布。",
        "walls": "下載今日美圖。僅限用作桌面桌布。"
    }
}
 

/**
     * 解析json資料
     * @param data
     * @return
     */
    private String resolveData(String data) {

        String url = "";
        try {
            JSONArray jsonArray = new JSONObject(data).getJSONArray("images");

            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jsonObject = (JSONObject) jsonArray.get(i);
                if (jsonObject.has("url")) {

                    url = jsonObject.getString("url");
                }
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }

        return url;
    }
 

2.示例工程

目錄結構：

  /**
     * 倒計時
     *
     * @param time 隔幾秒進入主介面
     */
    private void countDown(int time) {
        Timer timer = new Timer(true);
        TimerTask timerTask = new TimerTask() {
            @Override
            public void run() {

                iStartModel.cancelRequest();
                iStartView.goMainActivity();
            }
        };
        //time秒之後執行取消請求資料操作，跳轉到主介面
        timer.schedule(timerTask, time);
    }
 

 @Override
    public void getData() {
        if (NetUtil.isConnected()) {

            countDown(3500);

            iStartModel.requsetData(new LocalImageCallback() {
                @Override
                public void success(String url) {
                    iStartView.showStartInfo(url);
                }

                @Override
                public void fail(String msg) {

                }
            });
        } else {

            //當前無網路，可以提示使用者開啟設定，或者直接進入主介面。
            countDown(1000);
        }

    }