用来观察应用A的数据库变化,此应用是作为第三个应用利用内容观察者来监测第二个应用通过内容提供者操作第一个应用的数据库
the android-gridView is like listView need the adapter,we can use it by this demo.
This is a activity test, test the second activity and post data.
this a app for sendSms,u can select contacts in your phone,and this app support send to more than two people,Through this app,u can study how to use contentprovider and activity and use listview develop a simple app.
