Android: how to make sure an AsyncTask is terminated before I call another method?

Question

The situation is very simple. I use an AsyncTask to retrieve a String from an HttpClient.

Now I need the String retrieved by the AsyncTask to call another method on that String,

therefore i need to make sure the AsyncTask has terminated before calling the other method.

How do I do this?

Thanks for any suggestion.

Answer 1

Use a simple lock or mutex. Basically, add a variable and a getter in your AsyncTask:

public boolean locked;

public boolean isLocked(){
    return locked;
}

in your AsyncTask's onPreExecute method, add:

locked = true;

and in the onPostExecute method, add:

locked = false;

Any outside methods can then be placed into a loop such as:

MyTask foo = new MyTask();
foo.execute();
while (foo.isLocked())
{
    //wait, or sleep, or whatever
}
//here is where you execute code.

Answer 2

Just check if onPostExecute() already was called