android hide toolbar in specific fragment

问题

I have a problem that I don't know how to solve. How do you hide a toolbar in a specific fragment, I have already been searching around on the internet and what I found was communicating activity and fragment would solve it. But it doesn't work for me at all, here is my code:

main_activity:

public class MainActivity extends ActionBarActivity implements like_frag.OnHideToolbar{

....

public void onHidingToolbar(int position){
        Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
        if(toolbar == null){
            getSupportActionBar().hide();
        }else{
            getSupportActionBar().hide();
        }
    }

like_frag.java

public class like_frag extends Fragment {

    OnHideToolbar mCallback;
    Toolbar toolbar;

    public interface OnHideToolbar {
        public void onHidingToolbar(int position);
    }

    public void onAttach(Activity activity){

        try{
            mCallback = (OnHideToolbar) activity;
        }catch(ClassCastException e){
            throw new ClassCastException(activity.toString() + "error implementing");
        }
    }
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View rootView = inflater.inflate(R.layout.swipefrag, container, false);

        toolbar = (Toolbar)getActivity().findViewById(R.id.toolbar);

        return rootView;
    }

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
    }
}

thanks in advance.

I have a drawer inside the toolbar.

回答1:

Put this code in fragment in which you want to hide toolbar...

 @Override
public void onResume() {
    super.onResume();
    ((AppCompatActivity)getActivity()).getSupportActionBar().hide();
}
@Override
public void onStop() {
    super.onStop();
    ((AppCompatActivity)getActivity()).getSupportActionBar().show();
}

回答2:

In the fragment's onCreate method call:
((AppCompatActivity) getActivity()).getSupportActionBar().hide();
Replace AppCompateActivity with the activity class you used.

回答3:

Create an interface in the fragment and use it to tell the parent activity to hide the toolbar.

Add these lines to your fragment:

private OnEventListener listener;

public interface OnEventListener {

    void hideToolbar() ;
}

public void setOnEventListener(OnEventListener listener) {

    this.listener = listener;
}

After creating your fragment in the main activity add:

    myFragment.setOnEventListener(new MyFragment.OnEventListener() {
        @Override
        public void hideToolbar() {

            getSupportActionBar().hide();
        }
    });

Whenever you need to hide the toolbar execute:

listener.hideToolbar();

from inside your fragment.

回答4:

If you are using the new Navigation Component, add this while setting up the toolbar

navController.addOnDestinationChangedListener(new NavController.OnDestinationChangedListener() {
   @Override
   public void onDestinationChanged(@NonNull NavController controller,
           @NonNull NavDestination destination, @Nullable Bundle arguments) {
       if(destination.getId() == R.id.full_screen_destination) {
           toolbar.setVisibility(View.GONE);
           bottomNavigationView.setVisibility(View.GONE);
       } else {
           toolbar.setVisibility(View.VISIBLE);
           bottomNavigationView.setVisibility(View.VISIBLE);
       }
   }
});

回答5:

Just add these methods to the fragment where you want to diable the toolbar ,and also in the fragment's onStop() make it visible again.

 @Override
    public void onResume() {
        super.onResume();
        ((AppCompatActivity)getActivity()).getSupportActionBar().hide();
    }

    @Override
    public void onStop() {
        super.onStop();
        ((AppCompatActivity)getActivity()).getSupportActionBar().show();
    }

回答6:

in kotlin hide and show supportActionBar as follows:

override fun onResume() {
    super.onResume()
    (activity as AppCompatActivity).supportActionBar?.hide()
}

override fun onStop() {
    super.onStop()
    (activity as AppCompatActivity).supportActionBar?.show()
}

and if you want to have your own custom toolbar, in OncreateView set:

//your Custom toolbar in xml
val toolbar = binding.toolbar
(activity as AppCompatActivity).setSupportActionBar(toolbar)

回答7:

Put this code in fragment in which you want to hide toolbar...

Add this( ((AppCompatActivity)getActivity()).getSupportActionBar().hide();) in onCreateView or in onResume.

and do this in onDestroy()

@Override
public void onDestroy() {
super.onDestroy();
((AppCompatActivity)getActivity()).getSupportActionBar().show();}

来源：https://stackoverflow.com/questions/29128162/android-hide-toolbar-in-specific-fragment

标签

java

android

android-fragments

toolbar