ContentProvider官方教程(10)<provider>元素及属性介绍

The <provider> Element

　　Like Activity and Service components, a subclass of ContentProvider must be defined in the manifest file for its application, using the <provider> element. 　　The Android system gets the following information from the element:

• Authority (android:authorities)

Symbolic names that identify the entire provider within the system. This attribute is described in more detail in the section Designing Content URIs.

• Provider class name ( android:name ) 注意：是class name

The class that implements ContentProvider. This class is described in more detail in the section Implementing the ContentProvider Class.

• Permissions 权限

Attributes that specify the permissions that other applications must have in order to access the provider's data:

1. 1. android:grantUriPermssions: Temporary permission flag.
   2. android:permission: Single provider-wide read/write permission.
   3. android:readPermission: Provider-wide read permission.
   4. android:writePermission: Provider-wide write permission.

Permissions and their corresponding attributes are described in more detail in the section Implementing Content Provider Permissions.

• Startup and control attributes 启动属性

These attributes determine how and when the Android system starts the provider, the process characteristics of the provider, and other run-time settings:

1. 1. android:enabled: Flag allowing the system to start the provider.

      是否随系统启动

   2. android:exported: Flag allowing other applications to use this provider.
   3. android:initOrder: The order in which this provider should be started, relative to other providers in the same process.

      是否初始化

   4. android:multiProcess: Flag allowing the system to start the provider in the same process as the calling client.

      与客户端同进程 

   5. android:process: The name of the process in which the provider should run.
   6. android:syncable: Flag indicating that the provider's data is to be sync'ed with data on a server.

The attributes are fully documented in the dev guide topic for the <provider> element.

　　　　详见 guide/topics/manifest/provider-element.html

• Informational attributes

　　　　An optional icon and label for the provider:

1. 1. android:icon: A drawable resource containing an icon for the provider. The icon appears next to the provider's label in the list of apps in Settings > Apps > All.
   2. android:label: An informational label describing the provider or its data, or both. The label appears in the list of apps in Settings > Apps > All.

　　　　The attributes are fully documented in the dev guide topic for the <provider> element.

　　　　详见 guide/topics/manifest/provider-element.html