How to create our own Listener interface in android?

Question

Could someone help me to create user defined listener interface with some code snippets?

Answer 1

I have created a Generic AsyncTask Listener which get result from AsycTask seperate class and give it to CallingActivity using Interface Callback.

new GenericAsyncTask(context,new AsyncTaskCompleteListener()
        {
             public void onTaskComplete(String response) 
             {
                 // do your work. 
             }
        }).execute();

Interface

interface AsyncTaskCompleteListener {
   public void onTaskComplete(T result);
}

GenericAsyncTask

class GenericAsyncTask extends AsyncTask 
{
    private AsyncTaskCompleteListener callback;

    public A(Context context, AsyncTaskCompleteListener cb) {
        this.context = context;
        this.callback = cb;
    }

    protected void onPostExecute(String result) {
       finalResult = result;
       callback.onTaskComplete(result);
   }  
}

Have a look at this , this question for more details.