IMPORTANT: In July 2025, we stopped releasing new versions of KTX modules, and we removed the KTX libraries from the Firebase Android BoM (v34.0.0). If you use KTX APIs from the previously released KTX modules, we recommend that you migrate your app to use KTX APIs from the main modules instead. For details, see the FAQ about this initiative.

com.google.firebase.storage

Annotations

StorageException.ErrorCode

An ErrorCode indicates the source of a failed StorageTask or operation.

Interfaces

`OnPausedListener`	A listener that is called if the Task is paused via `pause`.
`OnProgressListener`	A listener that is called periodically during execution of the `ControllableTask`.
`StorageTask.ProvideError`	An object that returns an exception.
`StreamDownloadTask.StreamProcessor`	A callback that is used to handle the stream download

Classes

`CancellableTask`	Represents an asynchronous operation that can be canceled.
`ControllableTask`	Represents an asynchronous operation that can be paused, resumed and canceled.
`FileDownloadTask`	A task that downloads bytes of a GCS blob to a specified File.
`FileDownloadTask.TaskSnapshot`	Encapsulates state about the running `FileDownloadTask`
`FirebaseStorage`	FirebaseStorage is a service that supports uploading and downloading large objects to Google Cloud Storage.
`ListResult`	Contains the prefixes and items returned by a `list` call.
`StorageKt`
`StorageMetadata`	Metadata for a `StorageReference`.
`StorageMetadata.Builder`	Creates a StorageMetadata object.
`StorageReference`	Represents a reference to a Google Cloud Storage object.
`StorageTask`	A controllable Task that has a synchronized state machine.
`StorageTask.SnapshotBase`	Base class for state.
`StreamDownloadTask`	A task that downloads bytes of a GCS blob.
`StreamDownloadTask.TaskSnapshot`	Encapsulates state about the running `StreamDownloadTask`
`TaskState`	Used to emit events about the progress of storage tasks.
`TaskState.InProgress`	Called periodically as data is transferred and can be used to populate an upload/download indicator.
`TaskState.Paused`	Called any time the upload/download is paused.
`UploadTask`	An controllable task that uploads and fires events for success, progress and failure.
`UploadTask.TaskSnapshot`	Encapsulates state about the running `UploadTask`

Exceptions

StorageException

Represents an Exception resulting from an operation on a StorageReference.