How can I confim that a file was sent successfully

问题:

I have written an app that sends a file to a laptop via Bluetooth. I would like to be able to delete that file automatically after some confirmation that the file was sent successfully.

I get a Toast message from BlueTooth Share that the file was sent, but how can I detect this from my app?

Is there a callback that I can use for this?

Here is my method for sending the file using Android 4+

 File filename = new File(path + "/" + itemValue);
           Uri uri = Uri.fromFile(filename);
           //send file via bluetooth
           Intent intent = new Intent(Intent.ACTION_SEND);
           intent.setType("text/*");
           //this causes us to send via bluetooth only
           intent.setClassName("com.android.bluetooth", "com.android.bluetooth.opp.BluetoothOppLauncherActivity");
           intent.putExtra(Intent.EXTRA_STREAM, uri);
           startActivity(Intent.createChooser(intent, "Send file"));

回答1:

Looking through the source, I see Constants.java and HandoverService.java which seem to indicate that a Broadcast is sent when the transfer is completed.

/** intent action used to indicate the completion of a handover transfer */
public static final String ACTION_BT_OPP_TRANSFER_DONE =
        "android.btopp.intent.action.BT_OPP_TRANSFER_DONE";

and

/** intent extra used to indicate the success of a handover transfer */
public static final String EXTRA_BT_OPP_TRANSFER_STATUS =
        "android.btopp.intent.extra.BT_OPP_TRANSFER_STATUS";

public static final int HANDOVER_TRANSFER_STATUS_SUCCESS = 0;
public static final int HANDOVER_TRANSFER_STATUS_FAILURE = 1;

In HandoverService:

if (action.equals(ACTION_BT_OPP_TRANSFER_DONE)) {
    int handoverStatus = intent.getIntExtra(EXTRA_BT_OPP_TRANSFER_STATUS,
            HANDOVER_TRANSFER_STATUS_FAILURE);
    if (handoverStatus == HANDOVER_TRANSFER_STATUS_SUCCESS) {

So basically, you need to register a BroadcastReceiver for ACTION_BT_OPP_TRANSFER_DONE, and then check for the EXTRA_BT_OPP_TRANSFER_STATUS extra and see if it was success or failure.

Since these don't appear to be part of the public API, be warned that this could change in a future release.