CloudMediaProvider

CloudMediaProvider | API reference | Android Developers

Base class for a cloud media provider. A cloud media provider offers read-only access to durable media files, specifically photos and videos stored on a local disk, or files in a cloud storage service. To create a cloud media provider, extend this class, implement the abstract methods, and add it to your manifest like this:

Applications cannot use a cloud media provider directly; they must go through MediaStore.ACTION_PICK_IMAGES which requires a user to actively navigate and select media items. When a user selects a media item through that UI, the system issues narrow URI permission grants to the requesting application.

A media item must be an openable stream (with a specific MIME type). Media items can belong to zero or more albums. Albums cannot contain other albums.

Each item under a provider is uniquely referenced by its media or album id, which must not change which must be unique across all collection IDs as returned by onGetMediaCollectionInfo(Bundle).

Nested classes

CloudMediaProvider.CloudMediaSurfaceController

Manages rendering the preview of media items on given instances of Surface.

CloudMediaProvider.CloudMediaSurfaceStateChangedCallback

This class is used by CloudMediaProvider to send Surface state updates to picker launched via MediaStore.ACTION_PICK_IMAGES.

Inherited constants

From interface android.content.ComponentCallbacks2

`int`	`TRIM_MEMORY_BACKGROUND` Level for `onTrimMemory(int)`: the process has gone on to the LRU list.
`int`	`TRIM_MEMORY_COMPLETE` This constant was deprecated in API level 35. Apps are not notified of this level since API level 34
`int`	`TRIM_MEMORY_MODERATE` This constant was deprecated in API level 35. Apps are not notified of this level since API level 34
`int`	`TRIM_MEMORY_RUNNING_CRITICAL` This constant was deprecated in API level 35. Apps are not notified of this level since API level 34
`int`	`TRIM_MEMORY_RUNNING_LOW` This constant was deprecated in API level 35. Apps are not notified of this level since API level 34
`int`	`TRIM_MEMORY_RUNNING_MODERATE` This constant was deprecated in API level 35. Apps are not notified of this level since API level 34
`int`	`TRIM_MEMORY_UI_HIDDEN` Level for `onTrimMemory(int)`: the process had been showing a user interface, and is no longer doing so.

Public constructors
`CloudMediaProvider()`

Public methods
`final void`	`attachInfo(Context context, ProviderInfo info)` Implementation is provided by the parent class.
`final Bundle`	`call(String method, String arg, Bundle extras)` Implementation is provided by the parent class.
`final Uri`	`canonicalize(Uri uri)` Implementation is provided by the parent class.
`final int`	`delete(Uri uri, String selection, String[] selectionArgs)` Implementation is provided by the parent class.
`final String`	`getType(Uri uri)` Implementation is provided by the parent class.
`final Uri`	`insert(Uri uri, ContentValues values)` Implementation is provided by the parent class.
`CloudMediaProvider.CloudMediaSurfaceController`	`onCreateCloudMediaSurfaceController(Bundle config, CloudMediaProvider.CloudMediaSurfaceStateChangedCallback callback)` Returns a `CloudMediaSurfaceController` used for rendering the preview of media items, or null if preview rendering is not supported.
`CloudMediaProviderContract.Capabilities`	`onGetCapabilities()` Returns the `CloudMediaProviderContract.Capabilities` of this CloudMediaProvider.
`abstract Bundle`	`onGetMediaCollectionInfo(Bundle extras)` Returns metadata about the media collection itself.
`abstract ParcelFileDescriptor`	`onOpenMedia(String mediaId, Bundle extras, CancellationSignal signal)` Returns the full size media item identified by `mediaId`.
`abstract AssetFileDescriptor`	`onOpenPreview(String mediaId, Point size, Bundle extras, CancellationSignal signal)` Returns a thumbnail of `size` for a media item identified by `mediaId` The cloud media provider should strictly return thumbnail in the original `CloudMediaProviderContract.MediaColumns.MIME_TYPE` of the item.
`Cursor`	`onQueryAlbums(Bundle extras)` Returns a cursor representing all album items in the media collection optionally filtered by `extras` and sorted in reverse chronological order of `CloudMediaProviderContract.AlbumColumns.DATE_TAKEN_MILLIS`, i.e.
`abstract Cursor`	`onQueryDeletedMedia(Bundle extras)` Returns a `Cursor` representing all deleted media items in the entire media collection within the current provider version as returned by `onGetMediaCollectionInfo(Bundle)`.
`abstract Cursor`	`onQueryMedia(Bundle extras)` Returns a cursor representing all media items in the media collection optionally filtered by `extras` and sorted in reverse chronological order of `CloudMediaProviderContract.MediaColumns.DATE_TAKEN_MILLIS`, i.e.
`Cursor`	`onQueryMediaCategories(String parentCategoryId, Bundle extras, CancellationSignal cancellationSignal)` Queries for the available MediaCategories under the given `parentCategoryId`, filtered by `extras`.
`Cursor`	`onQueryMediaInMediaSet(String mediaSetId, Bundle extras, CancellationSignal cancellationSignal)` Queries for the available media items under a given `mediaSetId`, filtered by `extras`.
`Cursor`	`onQueryMediaSets(String mediaCategoryId, Bundle extras, CancellationSignal cancellationSignal)` Queries for the available MediaSets under a given `mediaCategoryId`, filtered by `extras`.
`Cursor`	`onQuerySearchSuggestions(String prefixText, Bundle extras, CancellationSignal cancellationSignal)` Queries for the available SearchSuggestions based on a `prefixText`, filtered by `extras`.
`Cursor`	`onSearchMedia(String searchText, Bundle extras, CancellationSignal cancellationSignal)` Searches media items based on entered search text, managed by `extras` and returns a cursor of `CloudMediaProviderContract.MediaColumns` based on the match.
`Cursor`	`onSearchMedia(String suggestedMediaSetId, String fallbackSearchText, Bundle extras, CancellationSignal cancellationSignal)` Searches media items based on a selected suggestion, managed by `extras` and returns a cursor of `CloudMediaProviderContract.MediaColumns` based on the match.
`final ParcelFileDescriptor`	`openFile(Uri uri, String mode, CancellationSignal signal)` Implementation is provided by the parent class.
`final ParcelFileDescriptor`	`openFile(Uri uri, String mode)` Implementation is provided by the parent class.
`final AssetFileDescriptor`	`openTypedAssetFile(Uri uri, String mimeTypeFilter, Bundle opts)` Implementation is provided by the parent class.
`final AssetFileDescriptor`	`openTypedAssetFile(Uri uri, String mimeTypeFilter, Bundle opts, CancellationSignal signal)` Implementation is provided by the parent class.
`final Cursor`	`query(Uri uri, String[] projection, Bundle queryArgs, CancellationSignal cancellationSignal)` Implementation is provided by the parent class.
`final Cursor`	`query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder, CancellationSignal cancellationSignal)` Implementation is provided by the parent class.
`final Cursor`	`query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)` Implementation is provided by the parent class.
`final int`	`update(Uri uri, ContentValues values, String selection, String[] selectionArgs)` Implementation is provided by the parent class.

Inherited methods

From class android.content.ContentProvider

`ContentProviderResult[]`	`applyBatch(String authority, ArrayList<ContentProviderOperation> operations)` Override this to handle requests to perform a batch of operations, or the default implementation will iterate over the operations and call `ContentProviderOperation.apply` on each of them.
`ContentProviderResult[]`	`applyBatch(ArrayList<ContentProviderOperation> operations)`
`void`	`attachInfo(Context context, ProviderInfo info)` After being instantiated, this is called to tell the content provider about itself.
`int`	`bulkInsert(Uri uri, ContentValues[] values)` Override this to handle requests to insert a set of new rows, or the default implementation will iterate over the values and call `insert(Uri, ContentValues)` on each of them.
`Bundle`	`call(String authority, String method, String arg, Bundle extras)` Call a provider-defined method.
`Bundle`	`call(String method, String arg, Bundle extras)`
`Uri`	`canonicalize(Uri url)` Implement this to support canonicalization of URIs that refer to your content provider.
`final ContentProvider.CallingIdentity`	`clearCallingIdentity()` Reset the identity of the incoming IPC on the current thread.
`abstract int`	`delete(Uri uri, String selection, String[] selectionArgs)` Implement this to handle requests to delete one or more rows.
`int`	`delete(Uri uri, Bundle extras)` Implement this to handle requests to delete one or more rows.
`void`	`dump(FileDescriptor fd, PrintWriter writer, String[] args)` Print the Provider's state into the given stream.
`final AttributionSource`	`getCallingAttributionSource()` Gets the attribution source of the calling app.
`final String`	`getCallingAttributionTag()` Return the attribution tag of the caller that initiated the request being processed on the current thread.
`final String`	`getCallingPackage()` Return the package name of the caller that initiated the request being processed on the current thread.
`final String`	`getCallingPackageUnchecked()` Return the package name of the caller that initiated the request being processed on the current thread.
`final Context`	`getContext()` Retrieves the Context this provider is running in.
`final PathPermission[]`	`getPathPermissions()` Return the path-based permissions required for read and/or write access to this content provider.
`final String`	`getReadPermission()` Return the name of the permission required for read-only access to this content provider.
`String[]`	`getStreamTypes(Uri uri, String mimeTypeFilter)` Called by a client to determine the types of data streams that this content provider supports for the given URI.
`abstract String`	`getType(Uri uri)` Implement this to handle requests for the MIME type of the data at the given URI.
`String`	`getTypeAnonymous(Uri uri)` Implement this to handle requests for MIME type of URIs, that does not need to reveal any internal information which should be protected by any permission.
`final String`	`getWritePermission()` Return the name of the permission required for read/write access to this content provider.
`Uri`	`insert(Uri uri, ContentValues values, Bundle extras)` Implement this to handle requests to insert a new row.
`abstract Uri`	`insert(Uri uri, ContentValues values)` Implement this to handle requests to insert a new row.
`boolean`	`isTemporary()` Returns true if this instance is a temporary content provider.
`void`	`onCallingPackageChanged()` Called whenever the value of `getCallingPackage()` changes, giving the provider an opportunity to invalidate any security related caching it may be performing.
`void`	`onConfigurationChanged(Configuration newConfig)` Called by the system when the device configuration changes while your component is running. This method is always called on the application main thread, and must not perform lengthy operations.
`abstract boolean`	`onCreate()` Implement this to initialize your content provider on startup.
`void`	`onLowMemory()` This is called when the overall system is running low on memory, and actively running processes should trim their memory usage. This method is always called on the application main thread, and must not perform lengthy operations.
`void`	`onTrimMemory(int level)` Called when the operating system has determined that it is a good time for a process to trim unneeded memory from its process.
`AssetFileDescriptor`	`openAssetFile(Uri uri, String mode, CancellationSignal signal)` This is like `openFile(Uri, String)`, but can be implemented by providers that need to be able to return sub-sections of files, often assets inside of their .apk.
`AssetFileDescriptor`	`openAssetFile(Uri uri, String mode)` This is like `openFile(Uri, String)`, but can be implemented by providers that need to be able to return sub-sections of files, often assets inside of their .apk.
`ParcelFileDescriptor`	`openFile(Uri uri, String mode, CancellationSignal signal)` Override this to handle requests to open a file blob.
`ParcelFileDescriptor`	`openFile(Uri uri, String mode)` Override this to handle requests to open a file blob.
`final ParcelFileDescriptor`	`openFileHelper(Uri uri, String mode)` Convenience for subclasses that wish to implement `openFile(Uri, String)` by looking up a column named "_data" at the given URI.
`<T> ParcelFileDescriptor`	`openPipeHelper(Uri uri, String mimeType, Bundle opts, T args, PipeDataWriter<T> func)` A helper function for implementing `openTypedAssetFile(Uri, String, Bundle)`, for creating a data pipe and background thread allowing you to stream generated data back to the client.
`AssetFileDescriptor`	`openTypedAssetFile(Uri uri, String mimeTypeFilter, Bundle opts, CancellationSignal signal)` Called by a client to open a read-only stream containing data of a particular MIME type.
`AssetFileDescriptor`	`openTypedAssetFile(Uri uri, String mimeTypeFilter, Bundle opts)` Called by a client to open a read-only stream containing data of a particular MIME type.
`Cursor`	`query(Uri uri, String[] projection, Bundle queryArgs, CancellationSignal cancellationSignal)` Implement this to handle query requests where the arguments are packed into a `Bundle`.
`Cursor`	`query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder, CancellationSignal cancellationSignal)` Implement this to handle query requests from clients with support for cancellation.
`abstract Cursor`	`query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)` Implement this to handle query requests from clients.
`boolean`	`refresh(Uri uri, Bundle extras, CancellationSignal cancellationSignal)` Implement this to support refresh of content identified by `uri`.
`final Context`	`requireContext()` Retrieves a Non-Nullable Context this provider is running in, this is intended to be called after `onCreate()`.
`final void`	`restoreCallingIdentity(ContentProvider.CallingIdentity identity)` Restore the identity of the incoming IPC on the current thread back to a previously identity that was returned by `clearCallingIdentity()`.
`final void`	`setPathPermissions(PathPermission[] permissions)` Change the path-based permission required to read and/or write data in the content provider.
`final void`	`setReadPermission(String permission)` Change the permission required to read data from the content provider.
`final void`	`setWritePermission(String permission)` Change the permission required to read and write data in the content provider.
`void`	`shutdown()` Implement this to shut down the ContentProvider instance.
`Uri`	`uncanonicalize(Uri url)` Remove canonicalization from canonical URIs previously returned by `canonicalize(Uri)`.
`int`	`update(Uri uri, ContentValues values, Bundle extras)` Implement this to handle requests to update one or more rows.
`abstract int`	`update(Uri uri, ContentValues values, String selection, String[] selectionArgs)` Implement this to handle requests to update one or more rows.

From class java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface android.content.ComponentCallbacks2


      onTrimMemory(int level)

Called when the operating system has determined that it is a good time for a process to trim unneeded memory from its process.

From interface android.content.ComponentCallbacks

`abstract void`	`onConfigurationChanged(Configuration newConfig)` Called by the system when the device configuration changes while your component is running.
`abstract void`	`onLowMemory()` This method was deprecated in API level 35. Since API level 14 this is superseded by `ComponentCallbacks2.onTrimMemory`. Since API level 34 this is never called. If you're overriding ComponentCallbacks2#onTrimMemory and your minSdkVersion is greater than API 14, you can provide an empty implementation for this method.

Public constructors

public CloudMediaProvider ()

Public methods

attachInfo

public final void attachInfo (Context context, 
                ProviderInfo info)

Implementation is provided by the parent class. Cannot be overridden.

Parameters
`context`	`Context`: This value cannot be `null`.
`info`	`ProviderInfo`: This value cannot be `null`.

call

public final Bundle call (String method, 
                String arg, 
                Bundle extras)

Implementation is provided by the parent class. Cannot be overridden.

Parameters
`method`	`String`: This value cannot be `null`.
`arg`	`String`: This value may be `null`.
`extras`	`Bundle`: This value may be `null`.

Returns
`Bundle`	This value cannot be `null`.

canonicalize

public final Uri canonicalize (Uri uri)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.

Returns
`Uri`	This value cannot be `null`.

delete

public final int delete (Uri uri, 
                String selection, 
                String[] selectionArgs)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.
`selection`	`String`: This value may be `null`.
`selectionArgs`	`String`: This value may be `null`.

Returns
`int`	The number of rows affected.

getType

public final String getType (Uri uri)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.

Returns
`String`	This value cannot be `null`.

insert

public final Uri insert (Uri uri, 
                ContentValues values)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.
`values`	`ContentValues`: This value cannot be `null`.

Returns
`Uri`	This value cannot be `null`.

onOpenMedia

public abstract ParcelFileDescriptor onOpenMedia (String mediaId, 
                Bundle extras, 
                CancellationSignal signal)

Returns the full size media item identified by mediaId.

If you block while downloading content, you should periodically check CancellationSignal.isCanceled() to abort abandoned open requests.

Parameters
`mediaId`	`String`: the media item to return. This value cannot be `null`.
`extras`	`Bundle`: to modify the way the fd is opened, there's none at the moment, but some might be implemented in the future. This value may be `null`.
`signal`	`CancellationSignal`: used by the OS to signal if the request should be cancelled. This value may be `null`.

Returns
`ParcelFileDescriptor`	read-only file descriptor for accessing the media file. This value cannot be `null`.

Throws
`FileNotFoundException`

onQueryMediaCategories

public Cursor onQueryMediaCategories (String parentCategoryId, 
                Bundle extras, 
                CancellationSignal cancellationSignal)

Queries for the available MediaCategories under the given parentCategoryId, filtered by extras. The columns of MediaCategories are in the class CloudMediaProviderContract.MediaCategoryColumns.

When parentCategoryId is null, this returns the root categories.

The order in which media categories are sorted in the cursor will be retained when displaying results to the user.

The cloud media provider must set the CloudMediaProviderContract.EXTRA_MEDIA_COLLECTION_ID as part of the returned cursor by using Cursor.setExtras. Not setting this is an error and invalidates the returned Cursor, meaning photo picker will not use the cursor for any operation.

extras may contain some key-value pairs which should be used to filter the results. If the provider handled any filters in extras, it must add the key to the ContentResolver.EXTRA_HONORED_ARGS as part of the returned cursor by using Cursor.setExtras. If not honored, photo picker will assume the result of the query is without the extra being used. Note: Currently this function does not pass any params in extras.

Parameters
`parentCategoryId`	`String`: the ID of the parent category to filter media categories. This value may be `null`.
`extras`	`Bundle`: containing keys to filter media categories: `Intent.EXTRA_MIME_TYPES` . This value cannot be `null`.
`cancellationSignal`	`CancellationSignal`: `CancellationSignal` to check if request has been cancelled. This value may be `null`.

Returns
`Cursor`	cursor with `CloudMediaProviderContract.MediaCategoryColumns` columns

onQueryMediaSets

public Cursor onQueryMediaSets (String mediaCategoryId, 
                Bundle extras, 
                CancellationSignal cancellationSignal)

Queries for the available MediaSets under a given mediaCategoryId, filtered by extras. The columns of MediaSet are in the class CloudMediaProviderContract.MediaSetColumns.

This returns MediaSets directly inside the given MediaCategoryId. If the passed mediaCategoryId has some more nested mediaCategories, the mediaSets inside the nested mediaCategories must not be returned in this response.

The order in which media sets are sorted in the cursor will be retained when displaying results to the user.

The cloud media provider must set the CloudMediaProviderContract.EXTRA_MEDIA_COLLECTION_ID as part of the returned cursor by using Cursor.setExtras . Not setting this is an error and invalidates the returned Cursor, meaning photo picker will not use the cursor for any operation.

extras may contain some key-value pairs which should be used to prepare the results. If the provider handled any filters in extras, it must add the key to the ContentResolver.EXTRA_HONORED_ARGS as part of the returned cursor by using Cursor.setExtras. If not honored, photo picker will assume the result of the query is without the extra being used.

If the cloud media provider supports pagination, they can set CloudMediaProviderContract.EXTRA_PAGE_TOKEN as the next page token, as part of the returned cursor by using Cursor.setExtras. If a token is set, the OS will pass it as a key-value pair in extras when querying for query media sets for subsequent pages. The provider can keep returning pagination tokens in the returned cursor by using Cursor.setExtras until the last page at which point it should not set a token in the returned cursor.

Parameters
`mediaCategoryId`	`String`: the ID of the media category to filter media sets. This value cannot be `null`.
`extras`	`Bundle`: containing keys to filter media sets: `CloudMediaProviderContract.EXTRA_PAGE_TOKEN` `CloudMediaProviderContract.EXTRA_PAGE_SIZE` `Intent.EXTRA_MIME_TYPES` . This value cannot be `null`.
`cancellationSignal`	`CancellationSignal`: `CancellationSignal` to check if request has been cancelled. This value may be `null`.

Returns
`Cursor`	cursor representing `CloudMediaProviderContract.MediaSetColumns` columns. This value cannot be `null`.

onQuerySearchSuggestions

public Cursor onQuerySearchSuggestions (String prefixText, 
                Bundle extras, 
                CancellationSignal cancellationSignal)

Queries for the available SearchSuggestions based on a prefixText, filtered by extras. The columns of SearchSuggestions are in the class CloudMediaProviderContract.SearchSuggestionColumns

If the user has not started typing, this is considered as zero state suggestion. In this case prefixText will be empty string.

The order in which suggestions are sorted in the cursor will be retained when displaying results to the user.

The cloud media provider must set the CloudMediaProviderContract.EXTRA_MEDIA_COLLECTION_ID as part of the returned cursor by using Cursor.setExtras . Not setting this is an error and invalidates the returned Cursor, meaning photo picker will not use the cursor for any operation.

extras may contain some key-value pairs which should be used to prepare the results. If the provider handled any params in extras, it must add the key to the ContentResolver.EXTRA_HONORED_ARGS as part of the returned cursor by using Cursor.setExtras. If not honored, photo picker will assume the result of the query is without the extra being used. Note: Currently this function does not pass any key-value params in extras.

Results may not be displayed if it takes longer than 300 milliseconds to get a response from the cloud media provider.

Parameters
`prefixText`	`String`: the prefix text to filter search suggestions. This value cannot be `null`.
`extras`	`Bundle`: containing keys to filter search suggestions. `CloudMediaProviderContract.EXTRA_PAGE_SIZE` . This value cannot be `null`.
`cancellationSignal`	`CancellationSignal`: `CancellationSignal` to check if request has been cancelled. This value may be `null`.

Returns
`Cursor`	cursor representing search suggestions containing all `CloudMediaProviderContract.SearchSuggestionColumns` columns. This value cannot be `null`.

onSearchMedia

public Cursor onSearchMedia (String searchText, 
                Bundle extras, 
                CancellationSignal cancellationSignal)

Searches media items based on entered search text, managed by extras and returns a cursor of CloudMediaProviderContract.MediaColumns based on the match.

The cloud media provider must set the CloudMediaProviderContract.EXTRA_MEDIA_COLLECTION_ID as part of the returned cursor by using Cursor.setExtras . Not setting this is an error and invalidates the returned Cursor, meaning photo picker will not use the cursor for any operation.

An example user journey:

User enters the search prompt.
Using onQuerySearchSuggestions(String, Bundle, CancellationSignal), photo picker display suggestions as the user keeps typing.
User types completely and then enters search, Photo picker calls: onSearchMedia(searchText, extras)

If the cloud media provider supports pagination, they can set CloudMediaProviderContract.EXTRA_PAGE_TOKEN as the next page token, as part of the returned cursor by using Cursor.setExtras. If a token is set, the OS will pass it as a key value pair in extras when querying for search media for subsequent pages. The provider can keep returning pagination tokens in the returned cursor by using Cursor.setExtras until the last page at which point it should not set a token in the returned cursor.

Results may not be displayed if it takes longer than 3 seconds to get a paged response from the cloud media provider.

Parameters
`searchText`	`String`: search text to be used. This value cannot be `null`.
`extras`	`Bundle`: containing keys to manage the search results: `CloudMediaProviderContract.EXTRA_PAGE_TOKEN` `CloudMediaProviderContract.EXTRA_PAGE_SIZE` `CloudMediaProviderContract.EXTRA_SORT_ORDER` `Intent.EXTRA_MIME_TYPES` . This value cannot be `null`.
`cancellationSignal`	`CancellationSignal`: `CancellationSignal` to check if request has been cancelled. This value may be `null`.

Returns
`Cursor`	cursor of `CloudMediaProviderContract.MediaColumns` based on the match. This value cannot be `null`.

onSearchMedia

public Cursor onSearchMedia (String suggestedMediaSetId, 
                String fallbackSearchText, 
                Bundle extras, 
                CancellationSignal cancellationSignal)

Searches media items based on a selected suggestion, managed by extras and returns a cursor of CloudMediaProviderContract.MediaColumns based on the match.

The cloud media provider must set the CloudMediaProviderContract.EXTRA_MEDIA_COLLECTION_ID as part of the returned cursor by using Cursor.setExtras . Not setting this is an error and invalidates the returned Cursor, meaning photo picker will not use the cursor for any operation.

An example user journey:

User enters the search prompt.
Using onQuerySearchSuggestions(String, Bundle, CancellationSignal), photo picker display suggestions as the user keeps typing.
User selects a suggestion, Photo picker calls: onSearchMedia(suggestedMediaSetId, fallbackSearchText, extras) with the suggestedMediaSetId corresponding to the user chosen suggestion. CloudMediaProviderContract.SearchSuggestionColumns.MEDIA_SET_ID

If the cloud media provider supports pagination, they can set CloudMediaProviderContract.EXTRA_PAGE_TOKEN as the next page token, as part of the returned cursor by using Cursor.setExtras. If a token is set, the OS will pass it as a key value pair in extras when querying for search media for subsequent pages. The provider can keep returning pagination tokens in the returned cursor by using Cursor.setExtras until the last page at which point it should not set a token in the returned cursor

Results may not be displayed if it takes longer than 3 seconds to get a paged response from the cloud media provider.

Parameters
`suggestedMediaSetId`	`String`: the media set ID of the suggestion that the user wants to search. This value cannot be `null`.
`fallbackSearchText`	`String`: optional search text to be used when `suggestedMediaSetId` is not useful. This value may be `null`.
`extras`	`Bundle`: containing keys to manage the search results: `CloudMediaProviderContract.EXTRA_PAGE_TOKEN` `CloudMediaProviderContract.EXTRA_PAGE_SIZE` `CloudMediaProviderContract.EXTRA_SORT_ORDER` `Intent.EXTRA_MIME_TYPES` . This value cannot be `null`.
`cancellationSignal`	`CancellationSignal`: `CancellationSignal` to check if request has been cancelled. This value may be `null`.

Returns
`Cursor`	cursor of `CloudMediaProviderContract.MediaColumns` based on the match. This value cannot be `null`.

query

public final Cursor query (Uri uri, 
                String[] projection, 
                Bundle queryArgs, 
                CancellationSignal cancellationSignal)

Implementation is provided by the parent class. Cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.
`projection`	`String`: This value may be `null`.
`queryArgs`	`Bundle`: This value may be `null`.
`cancellationSignal`	`CancellationSignal`: This value may be `null`.

Returns
`Cursor`	This value cannot be `null`.

query

public final Cursor query (Uri uri, 
                String[] projection, 
                String selection, 
                String[] selectionArgs, 
                String sortOrder, 
                CancellationSignal cancellationSignal)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.
`projection`	`String`: This value may be `null`.
`selection`	`String`: This value may be `null`.
`selectionArgs`	`String`: This value may be `null`.
`sortOrder`	`String`: This value may be `null`.
`cancellationSignal`	`CancellationSignal`: This value may be `null`.

Returns
`Cursor`	This value cannot be `null`.

query

public final Cursor query (Uri uri, 
                String[] projection, 
                String selection, 
                String[] selectionArgs, 
                String sortOrder)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.
`projection`	`String`: This value may be `null`.
`selection`	`String`: This value may be `null`.
`selectionArgs`	`String`: This value may be `null`.
`sortOrder`	`String`: This value may be `null`.

Returns
`Cursor`	This value cannot be `null`.

update

public final int update (Uri uri, 
                ContentValues values, 
                String selection, 
                String[] selectionArgs)

Implementation is provided by the parent class. Throws by default, and cannot be overridden.

Parameters
`uri`	`Uri`: This value cannot be `null`.
`values`	`ContentValues`: This value cannot be `null`.
`selection`	`String`: This value may be `null`.
`selectionArgs`	`String`: This value may be `null`.

Returns
`int`	the number of rows affected.