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AddToBackstack does not work when replacing fragments

I am having a problem where I call addToBackStack

into my fragment when it is replaced, but when I click back to return to that fragment it does not come back, it just closes my application.

Fragment fragmentWebView = new MyWebView();
transaction.replace(R.id.content_frame, fragmentWebView);
transaction.addToBackStack(null);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.commit();

Am I doing something wrong here? everything looks good to me.

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3 answers


Try adding this code to your activity

@Override
public void onBackPressed() {
    if (getFragmentManager().getBackStackEntryCount() > 0 ){
        getFragmentManager().popBackStack();
    } else {
        super.onBackPressed();
    }
}


Viewed here

Hope it helps

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I'm not sure if this is related, but you shouldn't be building your snippet with new

, see fooobar.com/questions/14216 / ...



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You have to call addToBackStack (MyWebView.class.getName ()); and it is recommended to check if your fragment exists. The closing transaction could be something like this:

Fragment fragmentWebView = getFragmentManager().findFragmentByTag(MyWebView.class.getName());
if (fragmentWebView == null)
     fragmentWebView = new MyWebView();

transaction.replace(R.id.content_frame, fragmentWebView, MyWebView.class.getName());
transaction.addToBackStack(MyWebView.class.getName());
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.commit();

Now you can identify your fragment using the (MyWebView.class.getName ()) tag. Hope this helps you!

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