Bespoke Android App Developers: Blobs (large datasets)

Bespoke Android App Developers: Blobs (large datasets)

The Android BlobStoreManager is a system service introduced in Android 12 that provides a way for apps to store and retrieve large data blobs efficiently. Blobs are arbitrary data that can be stored and retrieved using a unique identifier, and they can be up to 4GB in size.

The BlobStoreManager provides a number of features to help manage the storage and retrieval of blobs. For example, it supports automatic compression and decompression of blobs, and it provides an API for asynchronously transferring blobs between different devices.

Apps can use the BlobStoreManager to store and retrieve blobs by creating a BlobHandle object that uniquely identifies the blob, and then using the putBlob() and getBlob() methods to store and retrieve the blob data. The BlobStoreManager also provides methods for deleting and updating blobs.

To use the BlobStoreManager, apps need to declare the BLOB_STORE permission in their manifest file, and they also need to request the MANAGE_BLOBSTORE permission at runtime.

Overall, the BlobStoreManager provides a convenient and efficient way for apps to manage large data blobs, which can be useful for a variety of applications such as file sharing, backup and restore, and media streaming.

The Android BlobStoreManager is a system service introduced in Android 11 (API level 30) that provides a way to store and manage large binary data, such as media files or other types of files. It is part of the Android Storage Access Framework (SAF) and is intended to provide a more efficient and secure way to manage blobs of data than using the traditional file-based storage mechanisms.

The BlobStoreManager provides several benefits over traditional file-based storage:

  1. Large file support: The BlobStoreManager is optimized for storing large files, making it suitable for media files, backups, and other large data sets.

  2. Efficient storage: The BlobStoreManager uses a compressed file format and takes advantage of storage hardware acceleration to provide fast and efficient storage.

  3. Secure storage: The BlobStoreManager provides an isolated storage area for each app and enforces strict access controls to prevent unauthorized access.

  4. Easy access: The BlobStoreManager provides a unified API for accessing blob data, making it easy for apps to manage and manipulate large data sets.

To use the BlobStoreManager, an app must have the necessary permissions, including the READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE permissions. The app can then use the BlobStoreManager API to store and manage blobs of data.

Some common operations that an app can perform using the BlobStoreManager API include creating, deleting, and renaming blobs; copying and moving blobs between different storage locations; and querying the BlobStoreManager for information about available storage space and other storage-related metadata.

Overall, the Android BlobStoreManager provides a powerful and efficient way for Android apps to manage large binary data sets, making it a valuable addition to the Android storage infrastructure.

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