Android应用源码可以按音乐视频图片分类浏览的安卓文件浏览器

【实例简介】 书名《Java程序设计教程》 书号：978-7-302-18214-6 附件中是：电子教案、实例源文件、思考练习参考答案

Android 图形图表 示例源码

用android 摄像头实时监控，并上传至服务器 实例下载，仅供学习交流使用

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仿照qq 5.0 侧滑效果，很棒

非常入门级的示例，适合新手

android 下载远程网络文件 示例源码

private void computeCoordinates() {  BigStone stone;  BigStone menus;  for (int index = 0; index < STONE_COUNT; index ) {   stone = mStones[index];   stone.x = mPointX      (float) (mRadius * Math.cos(stone.angle * Math.PI / 180));   stone.y = mPointY      (float) (mRadius * Math.sin(stone.angle * Math.PI / 180));  }  if (flag == 0) {   for (int i = 0; i < MENUS; i ) {     menus = mMenus[i];     switch (i) {    case 0:     menus.x = 300 * 1.8f;     menus.y = 50;     break;    case 1:     menus.x = 300 * 1.8f 100;     menus.y = 50;     break;    case 2:     menus.x = 300 * 1.8f 200;     menus.y = 50;     break;    case 3:     menus.x = 300 * 1.8f;     menus.y = 150;     break;    case 4:     menus.x = 300 * 1.8f 10 100;     menus.y = 250;     break;     }    }  } }

android 简化数据库操作 例子源码

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.