Query transfers

When an upload or download operation is requested using the Amplify Android library, the request is first persisted in the local SQLite Database and then queued for execution. You can query the transfer operation queued in the local database using the transfer ID returned by an upload or download API. Get-Transfer API could retrieve a pending transfer previously en-queued and enable attaching a listener to receive updates on progress change, on-error or on-success, or pause, cancel or resume it.

Amplify.Storage.getTransfer("TRANSFER_ID",
    operation -> {
        Log.i("MyAmplifyApp", "Current State" + operation.getTransferState());
        // set listener to receive updates
        operation.setOnProgress( progress -> {});
        operation.setOnSuccess( result -> {});
        operation.setOnError(error -> {});
        // possible actions
        operation.pause();
        operation.resume();
        operation.start();
        operation.cancel();
        error -> Log.e("MyAmplifyApp", "Failed to query transfer", error)

Amplify.Storage.getTransfer("TRANSFER_ID",
    { operation ->
        Log.i("MyAmplifyApp", "Current State" + operation.transferState)
        // set listener to receive updates
        operation.setOnProgress {  }
        operation.setOnSuccess {  }
        operation.setOnError {  }
        // possible actions
        operation.pause()
        operation.resume()
        operation.start()
        operation.cancel()
        Log.e("MyAmplifyApp", "Failed to query transfer", it)

    val operation = Amplify.Storage.getTransfer("TRANSFER_ID")
    Log.i("MyAmplifyApp", "Current State" + operation.transferState)
    // set listener to receive updates
    operation.setOnProgress {  }
    operation.setOnSuccess {  }
    operation.setOnError {  }
    // possible actions
    operation.pause()
    operation.resume()
    operation.start()
    operation.cancel()
} catch (error: StorageException) {
    Log.e("MyAmplifyApp", "Failed to query transfer", error)

RxAmplify.Storage.getTransfer("TRANSFER_ID")
    .subscribe(
        operation -> {
            Log.i("MyAmplifyApp", "Current State" + operation.getTransferState());
            // set listener to receive updates
            operation.setOnProgress( progress -> {});
            operation.setOnSuccess( result -> {});
            operation.setOnError(error -> {});
            // possible actions
            operation.pause();
            operation.resume();
            operation.start();
            operation.cancel();
        error -> Log.e("MyAmplifyApp", "Failed to query transfer", error);

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