Refreshing fragments on filter selection from parent activity

Question

I have this scenario where I have An Activity(A) which has 2 tabs (ie. two fragments FA1,FA2) . The appBar in Activity A has a filter button which opens different Activities(B & C) depending on which tab is selected. this has been handled by the following code in A.

  toolbar.findViewById(R.id.filterimage).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i = null;
            if (tabLayout.getSelectedTabPosition() == 1) {
                i = new Intent(A.this, B.class);

            } else {
                i = new Intent(A.this, C.class);
            }
            startActivityForResult(i, 221);

        }
    });

all the api hits to show data in two fragments are made in the respective fragments. Filter which has been selected from Activity B or C is returned to activity A . Now depending on the filters selected I want to refresh the fragment(FA1 or FA2) again from it's parent activity ie. A. But I am unable to do so . How can I do this?

you can refresh fragments. You can have a link to those fragments in your activity, and call `fragment1.doSomething()` — Vladyslav Matviienko, May 18 '17 at 09:16
@rajat44 You can refresh fragment on onResume() i guess, if you haven't tried that!! — Nisarg, May 18 '17 at 09:17
what if I do Fragment fragment = new Fragment(); ? OR TabLayout.Tab tab = tabLayout.getTabAt(1); tab.select(); — rajat44, May 18 '17 at 09:20
Do you want to refresh the fragments when you return to Activity A after selecting a filter? — aborocz, May 18 '17 at 09:48

score 2 · Accepted Answer · edited May 18 '17 at 11:31

2

@Override
protected void onResume() {
    super.onResume();

 // Where currentFragment is the fragment you want to refresh

 getSupportFragmentManager()
.beginTransaction()
.detach(currentFragment)
.commitNowAllowingStateLoss();

 getSupportFragmentManager()
.beginTransaction()
.attach(currentFragment)
.commitAllowingStateLoss();

 }

Here you have to check particular case when it comes from B or C activity, otherwise don't refresh.

edited May 18 '17 at 11:31

Reporter

3,897
5
33
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answered May 18 '17 at 09:22

Nisarg

1,358
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30

It worked !! But what does above code do ? Can you please explain the code . Thanks!! – rajat44 May 18 '17 at 10:17
@rajat44 good to hear that, as name indicates using first 4 lines we detach your fragment and after that it attaches as if it loads at first time. and for commitAllowingStateLoss please check [this](http://stackoverflow.com/a/18345684/3117966) for more info – Nisarg May 18 '17 at 11:03

score 0 · Answer 2 · answered May 18 '17 at 09:41

Use different request code for both like below:

toolbar.findViewById(R.id.filterimage).setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent i = null;
        if (tabLayout.getSelectedTabPosition() == 1) {
            i = new Intent(A.this, B.class);
            startActivityForResult(i, 221);

        } else {
            i = new Intent(A.this, C.class);
            startActivityForResult(i, 222);
        }

    }
});

Then depends on request code get result and update fragments data.

Refreshing fragments on filter selection from parent activity

2 Answers2