How To Refresh The Viewpager For Every Tab?

I'm using ViewPager as a main layout and for individual pager views I use Fragments. The tabs are part of Action Bar. I wanna refresh the current tab with the refresh-button in my

Solution 1:

One way is to find the selected tab in the action bar, cast it to its type, and call a method on it.

That is a dependency you might want to avoid.

I prefer to use broadcasts for this scenario. Register a broadcast receiver in the fragments onResume method, unregister it in onPause. Then let a context broadcast an intent for a refresh and the fragment will do that.

This will let you refresh the fragments from everywhere in your application. Even if the refreshing code ends up in a service running in the background.

Update:

You will have some code like this anywhere you want (this is s context):

LocalBroadcastManagerlbm= LocalBroadcastManager.getInstance(this);
Intenti=newIntent(REFRESH_CONSTANT);
lbm.sendBroadcast(i);

Then in your fragment you listen for this broadcast:

publicclassMyFragmentextendsFragment {

    MyReceiver r;

    publicvoidrefresh() {
        // Do the refresh
    }

    publicvoidonPause() {
        LocalBroadcastManager.getInstance(mContext).unregisterReceiver(r);
    }

    publicvoidonResume() {
        r = newMyReceiver ();
        LocalBroadcastManager.getInstance(mContext).registerReceiver(r,
            newIntentFilter(REFRESH_CONSTANT));
    }

    privateclassMyReceiverextendsBroadcastReceiver {
        @OverridepublicvoidonReceive(Context context, Intent intent) {
            MyFragment.this.refresh();
        }
    }
}