Handle onBackPressed in android in fragment

Question

I want to handle onBackPressed in fragment

I use following code in my activity but this return 0

@Override
    public void onBackPressed() {

    int count = getFragmentManager().getBackStackEntryCount();

    Toast.makeText(getBaseContext(), ""+count, Toast.LENGTH_SHORT).show();
    if (count == 1) {
        super.onBackPressed();
        //additional code
    } else {
        getFragmentManager().popBackStack();
    }

}

You'll need call `addToBackStack()` when calling commit on `Fragment` in order to `getBackStackEntryCount()` or else it'll always give you **0**. — Jeel Vankhede, Jan 24 '19 at 06:38
Did you use `.addToBackStack(null)` when you added the fragment? — A.R.H, Jan 24 '19 at 06:38
Possible duplicate of [How to implement onBackPressed() in Fragments?](https://stackoverflow.com/questions/5448653/how-to-implement-onbackpressed-in-fragments) — Ashvin solanki, Jan 24 '19 at 06:58
**Check this link for perfect solution** https://stackoverflow.com/a/67086466/8572350 — Tejas Soni, Apr 14 '21 at 07:37

sushildlh · Accepted Answer · 2019-01-24T06:49:13.983

0

Just add .addToBackStack(null) in your Activity or Fragment . When you adding or replacing fragment. Like below

 getSupportFragmentManager().beginTransaction().replace(R.id.parent_layout, new MyFragment()).addToBackStack(null).commit();

Note:- you don't have to do anything in your onBackPressed() method.

edited Jan 24 '19 at 06:49

answered Jan 24 '19 at 06:40

sushildlh

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score 0 · Answer 2 · answered Jan 24 '19 at 07:28

Just app this line when you want to replace any fragment and manage backsack on Fragment.

ClientHome per = new ClientHome();
                Bundle bundle = new Bundle();
                bundle.putString("usertype", "client");
                per.setArguments(bundle);
                FragmentManager fragmentManager = getFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.setCustomAnimations(R.anim.slide_from_left, R.anim.slide_to_right);
                fragmentTransaction.replace(R.id.content_frame, per, "tag");
                fragmentTransaction.addToBackStack("tag");
                fragmentTransaction.commit();

Handle onBackPressed in android in fragment

2 Answers2