3.System Permissions(系统权限) Android is a privilege-separated operating system, in which each application runs with a distinct system identity (Linux user ID and group ID). Parts of the system are also separated into distinct identities. Linux thereb…
一.Introduction(入门) 1.Application Fundamentals(应用程序基础) Android apps are written in the Java programming language. The Android SDK tools compile your code-along with any data and resource files-into an APK: an Android package, which is an archive file…
一.Introduction(入门) 0.Introduction to Android(引进到Android) Android provides a rich application framework that allows you to build innovative apps and games for mobile devices in a Java language environment. The documents listed in the left navigation p…
2.Device Compatibility(设备兼容性) Android is designed to run on many different types of devices, from phones to tablets and televisions. As a developer, the range of devices provides a huge potential audience for your app. In order for your app to be s…
Android is a privilege-separated operating system, in which each application runs with a distinct system identity (Linux user ID and group ID). Parts of the system are also separated into distinct identities. Linux thereby isolates applications from…
Oracle推荐给用户授予权限时,给予用户可以完成操作的最小权限.应当尽量避免对用户授予包含ANY的系统权限,如SELECT ANY TABLE,CREATE ANY TABLE等.这些包含ANY的系统权限很大,只应该授权给DBA用户,而不应该授权给普通用户.如果给非DBA用户授权ANY系统权限,则会使数据库处于不安全状态.下面的例子展示了一个用户具有了CREATE ANY PROCEDURE和EXECUTE ANY PROCEDURE权限,就可以通过其他方式获取数据库中所有的权限. SQL>…
SQL Fundamentals || Oracle SQL语言 语句 解释 Create user Creates a user(usually performed by a DBA) Grant Gives other users privileges to access the objects Create role Creates a collection of privileges, usually performed by a DBA Alter user Changes a use…
