[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f7Rp73qszWh5q3gvWxjZ820Ylhnc8Tlx9Qz8sqDtmBAI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-05-29 17:22:08",34970265,[8,9,10,11],"在当前上下文中调用new ContentProvider()","在当前上下文中调用new ContentResolver()","在当前上下文中调用getContentProvider()","在当前上下文中调用getContentResolver()",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},5,"01208a0fd7bd0f5ce8d7cdaff49a6bcc","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1ef718cddacafc26020e15c28c44df4.png","Android高级编程","493bac4346de441c8f1c1521694a09a2","6-2-1 课内测试——自定义ContentProvider和访问","外部APP访问ContentProvider提供的数据,需要使用内容解析对象.对象一般的可选获取方式是",[21,32,41,44,53],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],34970263,[25,26,27,28],"server","activity","reciver","provider","自定义内容提供者需要继承ContentProvider,并在manifest文件中注册,注册的标签是","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],34970264,[36,37,38,39],"query","insert","update","delete","ContentPriver如果希望提供外部程序,添加数据的功能更,需要实现哪一个方法",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],34970266,[48,49,50,51],"57~65行定义的是ContentProvider中的查询方法.其返回值是一个游标","57行中的参数projection是一个字符串数组,表示希望查找的字段信息.如果为null,表示不查询任何字段","60行创建了一个数据库访问对象,以便从数据库中读取数据","61~63行,调用SQLiteDatabase类型的对象db的query方法,将数据表contacttb中的数据读取出来.读取拿一些字段由projection确定,读取哪一些记录有seletion和selectionArgs参数确定.如果这些参数的值都为null,则表示不限制条件和字段","下列代码理解错误的是:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd830522aa08f5a77328c0e3df57264fc.png\">",{"answer":54,"createTime":55,"id":56,"options":57,"question":60,"source":30,"type":61},[],"2025-06-17 13:15:20",202583275,[58,59],"正确","错误","利用向导创建ContentProvider时,需要指定一个authority,这个authortiy一般为包名.他帮我们做了两件事情,一件时创建了一个类,另一间时在manifest中进行了注册",3]