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androidandroid-asynctask

Make One AsyncTask Wait For Another One To Complete?

I have two Asynchronous tasks each one in a separate class, I can call them in the main thread, simply using:

 new RetrieveTask().execute();
 new RetrieveTaskImageData().execute();

But I want the first one to finish before starting the second.

This is an example of one of them:

class RetrieveTask extends AsyncTask<String, Void,Void> {
private Exception exception;
protected Void doInBackground(String... urls) {
    try {
        //Code here
    } catch (Exception e) {
        this.exception = e;

    } finally {
    }
    return null;
}
protected void onPostExecute() {
    //
}
}

How can we achieve this?

EDIT

Can we use new RetrieveTask().execute().getStatus()==..Finished ?

Thank you

Solution

  • This will be achieved automatically because unless you call executeOnExecutor, all AsyncTasks run on the same thread, so two of them can not run concurrently.