Canceling an Firebase Storage UploadTask

Question

My use case is simple. Upload multiple images in the background and show the progress in a notification. Now I want to cancel this task when the user presses the cancel button in the notification. As the upload task cannot be serialized then how am I supposed to cancel that particular upload task?

Answer 1

Upload multiple images in the background and show the progress in a notification.

For those operations, I assume you are using a line of code similar to this:

UploadTask uploadTask = storageReference.putFile(filePath);

Now I want to cancel this task when the user presses the cancel button in the notification.

As seen the above line of code, the putFile(Uri uri) method that is called on a StorageReference object, returns an object of type UploadTask . This class is a subclass of StorageTask , which in terms is a subclass of ControllableTask , which is also a subclass of CancellableTask .

Because of the inheritance relationship between these classes, you can simply call CancellableTask's cancel() method:

Attempts to cancel the task.

In order to cancel the Task. In code should look like this:

uploadTask.cancel();