Robospice Android - spiceRequest that begins in one activity and ends in another activity

Question

I'm trying to start a robospice request in Activity A and then receive the results of the request in Activity B.

In Activity A

FetchSpiceRequest fetchSpiceRequest = new FetchSpiceRequest();
spiceManager.execute(fetchSpiceRequest, new ActivityB().postListener);

The PostListener implements PendingRequestListener and is sitting within Activity B.

In Activity B

We addListener for the pending request that was started in Activity A below.

@Override
protected void onStart() {
    spiceManager.start( this );
    spiceManager.addListenerIfPending(Post.class, 0, new PostListener());

We then implement the PostListener in Activity B below.

public final class PostListener implements PendingRequestListener<Post> {

    @Override
    public void onRequestFailure(SpiceException spiceException) {
        Toast.makeText(MainActivity.this, "Exception: " + spiceException.toString(), Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onRequestSuccess(Post post) {
        Toast.makeText(MainActivity.this, "Added", Toast.LENGTH_SHORT).show();

    }

    @Override
    public void onRequestNotFound() {
        Toast.makeText(MainActivity.this, "Request not found", Toast.LENGTH_SHORT).show();
    }
}

Finally, we create a variable within Activity B called so that A can pick it up (eg. when I call new ActivityB().postListener):

public PostListener PostListener;

This doesn't work and it always calls onRequestNotFound in the PostListener.

What am I doing wrong?

I have also looked at this post: Robospice - keep spice service continue running when changing activity but @Snicolas doesn't seem to mention anything about how the spiceManager.execute statement should look like in the first activity.

Answer 1

Eventually, I had to use LocalBroadcastManager to achieve what I want to do:

Activity A

FetchSpiceRequest fetchSpiceRequest = new FetchSpiceRequest();
spiceManager.execute(fetchSpiceRequest, postListener);

Please note that postListener is situated within Activity A. It actually doesn't do much as all the work will now be performed inside the localbroadcastreceiver:

public final class AddPostListener implements RequestListener<Post> {

    @Override
    public void onRequestFailure(SpiceException spiceException) {
        Toast.makeText(AddPostActivity.this, "Exception: " + spiceException.toString(), Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onRequestSuccess(Post post) {
        Toast.makeText(AddPostActivity.this, "Added", Toast.LENGTH_SHORT).show();
        Log.e("AddPostListener", "Background service finished"); }

Inside the fetchSpiceRequest, we perform the work asynchronously and once it is finished, we call the localbroadcast manager to send our results back to Activity B:

public class FetchSpiceRequest extends SpringAndroidSpiceRequest<Post> {

    private Post mPost;
    private Context mContext;

    public AddPostSpiceRequest(Context context, Post post) {
        super(Post.class);
        mPost = post;
        mContext = context;
    }

    @Override
    public Post loadDataFromNetwork() throws Exception {
//Do some network activity to get a post and then after the network activity ends, send the post through the broadcast activity to Activity B
        Intent intent = new Intent("my-event");
        intent.putExtra("post", post);
        LocalBroadcastManager.getInstance(mContext).sendBroadcast(intent);   
}

Activity B

Register your localBroadcast receiver:

@Override
public void onResume() {
    super.onResume();
    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
            new IntentFilter("my-event")); }

Do something with the received message:

private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        // Get extra data included in the Intent
        Post post = intent.getParcelableExtra("post");
        Log.e("receiver", "Got message: " + post.getPostheader());
    }
};