{"id":134479,"date":"2020-07-07T09:46:20","date_gmt":"2020-07-07T01:46:20","guid":{"rendered":"http:\/\/4563.org\/?p=134479"},"modified":"2020-07-07T09:46:20","modified_gmt":"2020-07-07T01:46:20","slug":"isolate-%e7%8e%af%e5%a2%83%e4%b8%8b-sharedpreferences-%e6%95%b0%e6%8d%ae%e4%b8%8d%e8%83%bd%e5%90%8c%e6%ad%a5%e9%97%ae%e9%a2%98%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=134479","title":{"rendered":"Isolate \u73af\u5883\u4e0b SharedPreferences \u6570\u636e\u4e0d\u80fd\u540c\u6b65\u95ee\u9898\uff1f"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  Isolate \u73af\u5883\u4e0b SharedPreferences \u6570\u636e\u4e0d\u80fd\u540c\u6b65\u95ee\u9898\uff1f               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : YokitCoder <\/span>  <span><i><\/i> 5<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<pre><code>cronStock() async {     _stockCode = _stockCodeController.value.text;     _growRate = _growRateController.value.text;     _reduceRate = _reduceRateController.value.text;      \u2026\u2026      saveData();     refreshStock(true);      await AndroidAlarmManager.periodic(const Duration(seconds: 30), periodicAlarmID, refreshStock, wakeup: true); }  saveData() async {     SharedPreferences prefs = await SharedPreferences.getInstance();     prefs.reload();     try {         print('0001 saveData: '+DateTime.now().toString());         prefs.setString('stock_prefix', stockPrefix);         prefs.setString('stock_code', _stockCodeController.value.text);         prefs.setDouble('grow_rate', double.parse(_growRateController.value.text));         prefs.setDouble('reduce_rate', double.parse(_reduceRateController.value.text));     } on FormatException catch(e) {      } catch (e) {         \/\/ No specified type, handles all     } }  \u2026\u2026  refreshStock([bool isManual = false]) {     print('0002 refreshStock afterTimer: '+DateTime.now().toString());      Future&lt;List&gt; stockShared = getShared();     stockShared.then((List shared) {          print('isManual: $isManual');         print('shareData: $shared');              }); }  Future&lt;List&gt; getShared() async {     print('getShared');     SharedPreferences prefs = await SharedPreferences.getInstance();     prefs.reload();     return [         prefs.getString('stock_prefix'),         prefs.getString('stock_name'),         prefs.getString('stock_code'),         prefs.getDouble('grow_rate'),         prefs.getDouble('reduce_rate'),          \/\/ \u5f53\u524d\u503c         prefs.getString('stock_price'),         prefs.getDouble('stock_rate'),         prefs.getInt('rate_color'),     ]; } <\/code><\/pre>\n<p>AndroidAlarmManager \u63d2\u4ef6\u7528\u5230\u4e86 Isolate \u73af\u5883\uff0c\u5728 Isolate \u73af\u5883\u4e0b refreshStock \u51fd\u6570\u4e2d\u7684 getShared()\u62ff\u5230\u7684 SharedPreferences \u6570\u548c\u4e0a\u9762 saveData()\u5b58\u50a8\u7684\u6570\u636e\u4e0d\u540c\u6b65\uff0c\u8981\u591a\u6b21\u95f4\u9694\u8c03\u7528\u7684\u540e\u624d\u4f1a\u540c\u6b65\u5230\u3002<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>0<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>Isolate \u73af\u5883\u4e0b Share&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/134479"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=134479"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/134479\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=134479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=134479"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=134479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}