android wifi设置静态ip 实例源码下载

具体项目功能如下： 1.手机APP远程控制：STM32L432开发板通过WIFI模块与因特网服务器建立TCP连接，服务器使用腾讯云，服务器系统为ubuntu，就是在ubuntu上建立一个TCP中继服务器，实现远程手机端与家居系统的信息中继传递，从而实现远程控制。 2.室内控制质量检测：通过MQ-2、MQ-135、GP2Y1050AU0F模块实现室内有毒气体（苯等）、可燃气体（一氧化碳等）和PM2.5的检测，并通过ESP8266将检测到的数据反馈给APP端。 3.家具电器自动控制：家具系统能通过检测到的数据自动控制打开空气净化器、抽风机等

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Rules::The AsyncTask instance must be created in UI thread. .execute must be invoked on the UI thread.Never call  objMyTask.onPreExecute(), objMyTask.doInBackground(), objMyTask.onProgressUpdate(),  objMyTask.onPostExecute manually.The AsyncTask can be executed only once (an exception will be thrown if a second execution is attempted.)AsyncTask have Four Main Method... onPreExecute()  doInBackground() onProgressUpdate() onPostExecute()  onPreExecute-This method is called first when you start AsyncTask using objAsync.execute().And mostly this method is use for initializing dialog(ProgressDialog,CustomDialog) and showing. doInBackground-The main purpose of AsyncTask is accomplished by this method.Any non-UI thread process is running in this method.Such as Rss Feed Reader,Image and video Uploading and Downloading.You cant handle your View in this method.Because this method is non-UI thread.While any background process is running if you want to handle UI therea are  onProgressUpdate method. after completion of process this method send result to OnPostExecute. onProgressUpdate-While backgrounding task is running ,you can handle your UI using this method .Such as status of downloading or uploading task.and this method is called from  doInBackground.Using publishProgress() you can call onProgressUpdate method to update UI while process is running. onPostExecute -This method is called after the background computation finishes.The result of background process in passed in this method as parameters.And now you can dismiss progress dialog ,to indicate that background task is completed. You can cancel AsyncTask using objAsyncTask.cancel().then you just check in doInBackground, if (isCancelled()) { break; } else {        //continue... } See this Image For more Clear.