ContentActivity
-MyHelper helper-int id-Content content-News news-MyApp myApp
CommentActivity
-int id-ListView list-List data-CommentListAdapter adapter
-initView()-loadData()-initData()+bClick(View)
CollectionActivity
-List data-CollectionListAdapter adapter-MyHelper helper-String username
-initView()-loadData()-initData()-query(String)-delete(int):boolean+bClick(View)
RegisterActivity
-MyHelper helper
BaseActivity
+SharedPreferences preferences+SQLiteDatabase database
#onCreate(Bundle savedInstanceState)#onDestory()
MyHelper
+String DB_NAME+int DB_VERSION
MainActivity
-MyHelper helper-FragmentManager manager-long exitTime
LoginActivity
