Android通讯录

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.

不可多得的导弹仿真源程序 非常的经典 绝对不会后悔

STM32F103RCT6最小系统板和原理图,Altium designer16工程文件，实际测过可用

Wi-fi Director

android java 通用代码，关于用properties存储打印Log 例子

android 视频录制 实例源码

监听自身应用卸载，并在卸载之后，使用libcurl三方库进行一次三方请求，或者启动网页的实例工程。

android 实现背景图片伸缩ScrollView之阻尼特效（仿多米,PaPa个人页面特效也称为阻尼效果）

tessdata是语言包 需要放到手机SD卡根目录tess-two是OCR引擎，需要导入到项目中（项目中已经导入）

android 录制视频实例 VideoRecordDemo