ContentResolverCompat

class ContentResolverCompat
kotlin.Any
   ↳ androidx.core.content.ContentResolverCompat

Helper for accessing features in android.content.ContentResolver in a backwards compatible fashion.

Summary

Public methods

static Cursor!
query(resolver: ContentResolver!, uri: Uri!, projection: Array<String!>!, selection: String!, selectionArgs: Array<String!>!, sortOrder: String!, cancellationSignal: CancellationSignal!)

Query the given URI, returning a Cursor over the result set with optional support for cancellation.

Public methods

query

static fun query(resolver: ContentResolver!, uri: Uri!, projection: Array<String!>!, selection: String!, selectionArgs: Array<String!>!, sortOrder: String!, cancellationSignal: CancellationSignal!): Cursor!

Query the given URI, returning a Cursor over the result set with optional support for cancellation.

For best performance, the caller should follow these guidelines:

  • Provide an explicit projection, to prevent reading data from storage that aren't going to be used.
  • Use question mark parameter markers such as 'phone=?' instead of explicit values in the selection parameter, so that queries that differ only by those values will be recognized as the same for caching purposes.

Parameters
uri ContentResolver!: The URI, using the content:// scheme, for the content to retrieve.
projection ContentResolver!: A list of which columns to return. Passing null will return all columns, which is inefficient.
selection ContentResolver!: A filter declaring which rows to return, formatted as an SQL WHERE clause (excluding the WHERE itself). Passing null will return all rows for the given URI.
selectionArgs ContentResolver!: You may include ?s in selection, which will be replaced by the values from selectionArgs, in the order that they appear in the selection. The values will be bound as Strings.
sortOrder ContentResolver!: How to order the rows, formatted as an SQL ORDER BY clause (excluding the ORDER BY itself). Passing null will use the default sort order, which may be unordered.
cancellationSignal ContentResolver!: A signal to cancel the operation in progress, or null if none. If the operation is canceled, then OperationCanceledException will be thrown when the query is executed.
Return
Cursor!: A Cursor object, which is positioned before the first entry, or null

See Also