取消 Firebase 存储上传任务
Canceling an Firebase Storage UploadTask
我的用例很简单。在后台上传多张图片并在通知中显示进度。现在我想在用户按下通知中的取消按钮时取消此任务。由于上传任务无法序列化，那么我应该如何取消特定的上传任务？
Upload multiple images in the background and show the progress in a notification.
对于这些操作，我假设您使用的是类似于以下的一行代码：
UploadTask uploadTask = storageReference.putFile(filePath);
Now I want to cancel this task when the user presses the cancel button in the notification.
如上一行代码所示，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.
因为这些类之间的继承关系，可以直接调用CancellableTask的cancel()方法：
Attempts to cancel the task.
为了取消任务。在代码中应该是这样的：
uploadTask.cancel();
我的用例很简单。在后台上传多张图片并在通知中显示进度。现在我想在用户按下通知中的取消按钮时取消此任务。由于上传任务无法序列化，那么我应该如何取消特定的上传任务？
Upload multiple images in the background and show the progress in a notification.
对于这些操作，我假设您使用的是类似于以下的一行代码：
UploadTask uploadTask = storageReference.putFile(filePath);
Now I want to cancel this task when the user presses the cancel button in the notification.
如上一行代码所示，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.
因为这些类之间的继承关系，可以直接调用CancellableTask的cancel()方法：
Attempts to cancel the task.
为了取消任务。在代码中应该是这样的：
uploadTask.cancel();