android - How to call Activity method in an AsyncTask

Question

I would like to call an Activity method after the onPostExecute of my AsyncTask. Do you know how I can do that?

I want to call in the sendSMS(String phoneNumber, String message) method in the onPostExecute.

Answer 1

One way is to pass an instance of the Activity through PostTask constructor, something like:

private class PostTask extends AsyncTask<String, Integer, String>
{
    private AsyncBigCalculActivity activity;

    public PostTask(AsyncBigCalculActivity activity)
    {
        this.activity = activity;
    }

    // ...
}

and on creating the PostTask instance, pass the activity instance:

new PostTask(this).execute();

Now you can invoke sendSMS() from within PostTask, like:

activty.sendSMS(...);

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Also note that if you are defining the PostTask as a private class inside the activty, then you can invoke sendSMS() like:

AsyncBigCalculActivity.this.sendSMS(...);