Android开发精典案例60个

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.

由于最近项目需要，就做了这个listview的刷新功能，一般都只是下拉刷新或者上拉加载更多，这次是点击单个item，刷新所点击的item内容，希望对大家有所帮助。如有好的建议或者意见，也希望大家指教。

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发3个使用MATLAB对OFDM系统的仿真,实现了基本的流程,(Three simulation of OFDM system using MATLAB is made, and the basic flow is realized.)

Holds information about a specific android.content.ContentProvider content provider.

需要将package 中的_ 去掉后 即可编译成功

android的地图编辑器实例，告诉你如何写地图(android map editor instance, tell you how to write map)

android broadcast （广播生命周期实例）下载

a android mobile documents

Android的样式和风格案例1-ImageButton按下的弹起的效果 案例2-自定义的Activity的Theme 案例3-Activity背景模糊透明 (Android style in case 1-ImageButton the effect of pressing the up Case 2- Custom Theme Activity in the case of 3-Activity background blur transparent)