popBackStack() after addToBackStack does not work

Question

My project contains two fragment :

• FragmentA : the fragment loaded by default when the app starts
• FragmentB : replace the fragmentA when a c

Answer 1

I will suggest using the fragment replacement with Tag to produce the same result .

Add the fragment B to activity with tag

fragmentTransaction.replace(R.id.main_fragment_container, new FragmentB(),"TAG_B");

Fragment A -> Fragment B [onBackPressed] -->Fragment A Override the onBackPressed() in the Activity files where ,

// check for fragment B and you are viewing fragment B

if (getSupportFragmentManager().findFragmentByTag("TAG_B")!=null)  
{
    fragmentTransaction.replace(R.id.main_fragment_container, new FragmentA(),"TAG_A");
}

addToBackStack("TAG") and popBackStackImmediate("TAG") always revert to fragment condition without any data in the UI right before fragment is created or added to activity !