How to run an async task for every x mins in android?

Question

how to run the async task at specific time? (I want to run it every 2 mins)

I tried using post delayed but it\'s not working?

    tvData.postDelayed         


        

Answer 1

I suggest to go with Handler#postDelayed(Runnable). Keep in mind that this method will work only when your app is running (may be in background) but if user closes it manually or simply Android runs out of memory it'll stop working and won't be restarted again later - for that you need to use services.

final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        handler.postDelayed(this, 2 * 60 * 1000); // every 2 minutes
        /* your code here */
    }
}, 2 * 60 * 1000); // first run after 2 minutes

This code will wait 2 minutes, execute your code, and then keep doing that every 2 minutes. But if you want it to run instantly for the first time - and then start the wait-do loop, instead use:

final Handler handler = new Handler();
 /* your code here */
new Runnable() {
    @Override
    public void run() {
        handler.postDelayed(this, 2 * 60 * 1000); // every 2 minutes
         /* and also here - your code */
    }
}.run(); 

or, if your code is longer than just one method (readWebsite() in this case), and you don't want that to be duplicated:

final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        handler.postDelayed(this, 2 * 60 * 1000); // every 2 minutes
         /* your longer code here */
    }
}, 0); // first run instantly

(^ this one is just like the first example but has a 0ms delay before first run instead of 2 minutes)

(This answer is based on @Devashish Mamgain's one but I added too much details for an edit so I had to add a new one)