android - do you ever have to add fragments to the manifest

Question

Im using a fragment that is supposed to display a webview. When I try to instantiate it from the class that uses it I get the following warning in my logcat.

02-         


        

Answer 1

if you want to go back from activity to Fragment try this

proToolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

//Note: you must give an id to the Main layout of your activity e.g : searchVehicles

            ((ConstraintLayout) findViewById(R.id.searchVehicles)).removeAllViews();
            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragment_nearby_vehicles fnv = new fragment_nearby_vehicles();
            fragmentTransaction.add(R.id.searchVehicles, fnv).commit();
        }
    });