NavigationDrawer 使用 ExpandableList

android 中 javascript 与java 交互示例源码下载

android android Gravity induction test 重力感应测试(android Gravity induction test )

手机  平板音乐播放器源码！！又一个Android音乐播放器应用Java源码，除了基本的音乐播放功能外，还添加了视觉效果，自定义绘画歌词，产生滚动效果，读取歌词文件内容，解析歌曲时间，与音乐播放相关的技巧应用，都可以通过本播放器来提现，因此是学习Android值得一看的小实例。

android常用控件的代码实现，非常适合初学者，值得拥有(This demo shows us how to use the basic controls in android, it is really useful for the beginners, it is worthful)

Nicholson - Intermediate Microeconomics and Its Application 11e.pdf

说明：  android手机系统的游戏连连看,游戏的基本功能已经实现(the game of the android system picture matching )

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.

andriod动画资源 提供各种android动画的的制作方法，有很好的学习价值。(Android provides all sorts of android animation animation resources producing method, have good learning value.)

Android获取系统隐藏服务实现锁屏，大家可以学习学习。(Android acquisition system to hide the service to achieve lock screen )

Android铃声设置模块源码，通过本Andorid源码将了解以下相关技巧： 声明和取得TabHost对象、新建一个newTabSpec（newTabSpec）、设置其标签和图标（setIndicator）、设置内容（setContent）、情景模式设置、设置TabHost的背景图片资源、初始化，取得AudioManager、标签切换事件处理、RadioButton添加监听器、添加onChangeListener、RadioButton添加监听器、取得手机的初始音量，并初始化进度条、取得初始模式，并分别设置图标、增加和降低音量、静音和振动状态的实现、计算切换时间等。