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Added in API level 1

ContentUris

public class ContentUris
extends Object

java.lang.Object
    android.content.ContentUris


适用于使用“content”(content://)方案的 Uri对象的实用方法。

内容URI具有语法

content://authority/path/id

content:
The scheme portion of the URI. This is always set to ContentResolver.SCHEME_CONTENT (value content://).
authority
A string that identifies the entire content provider. All the content URIs for the provider start with this string. To guarantee a unique authority, providers should consider using an authority that is the same as the provider class' package identifier.
path
Zero or more segments, separated by a forward slash ( /), that identify some subset of the provider's data. Most providers use the path part to identify individual tables. Individual segments in the path are often called "directories" although they do not refer to file directories. The right-most segment in a path is often called a "twig"
id
A unique numeric identifier for a single row in the subset of data identified by the preceding path part. Most providers recognize content URIs that contain an id part and give them special handling. A table that contains a column named _ID often expects the id part to be a particular value for that column.

摘要(Summary)

Public constructors

ContentUris()

公共方法(Public methods)

static Uri.Builder appendId(Uri.Builder builder, long id)

将给定的ID追加到路径的末尾。

static long parseId(Uri contentUri)

将最后一个路径段转换为长整型。

static Uri withAppendedId(Uri contentUri, long id)

将给定的ID追加到路径的末尾。

继承方法(Inherited methods)

From class java.lang.Object

Public constructors

ContentUris

Added in API level 1
ContentUris ()

公共方法(Public methods)

appendId

Added in API level 1
Uri.Builder appendId (Uri.Builder builder, 
                long id)

将给定的ID追加到路径的末尾。

参数(Parameters)
builder Uri.Builder: to append the ID to
id long: to append
返回(Returns)
Uri.Builder the given builder

parseId

Added in API level 1
long parseId (Uri contentUri)

将最后一个路径段转换为长整型。

这支持ID存储在最后一个段中的内容URI的通用约定。

参数(Parameters)
contentUri Uri
返回(Returns)
long the long conversion of the last segment or -1 if the path is empty
抛出异常(Throws)
UnsupportedOperationException if this isn't a hierarchical URI
NumberFormatException if the last segment isn't a number

withAppendedId

Added in API level 1
Uri withAppendedId (Uri contentUri, 
                long id)

将给定的ID追加到路径的末尾。

参数(Parameters)
contentUri Uri: to start with
id long: to append
返回(Returns)
Uri a new URI with the given ID appended to the end of the path

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