pork

读取通讯录，短信，编辑短信

Android—Sqlite数据库信息demo    

《单片机通信技术与工程实践》源程序 详细介绍了 单片机的通信原理 以及通过实践例子加以说明("SCM communication technology and engineering practice," the source in detail, the computer's communication theory and practice through examples to illustrate)

说明：  心率传感器，下机位arduino程序，拷入开发板中处理数据(Heart Rate Sensor, Arduino Program)

Gson 实体类和json之间相互转化例子

界面显示，listview，可滑动的，快捷栏(Interface display the listview sliding)

Android 视频上传源码

一款封装好的类似iphone的时间选择器

说明：  电力系统继电保护原理（第三版）-天津大学.pdf 电子书籍。(Power System Protection Principles (third edition)- Tianjin University. Pdf e-books.)

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.