package com.xunao.effectdemo.activity; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import androidx.annotation.NonNull; import androidx.fragment.app.Fragment; import androidx.navigation.fragment.NavHostFragment; import com.xunao.effectdemo.R; import com.xunao.effectdemo.databinding.FragmentSecondBinding; public class SecondFragment extends Fragment { private FragmentSecondBinding binding; @Override public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState ) { binding = FragmentSecondBinding.inflate(inflater, container, false); return binding.getRoot(); } public void onViewCreated(@NonNull View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); binding.buttonSecond.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { NavHostFragment.findNavController(SecondFragment.this) .navigate(R.id.action_SecondFragment_to_FirstFragment); } }); } @Override public void onDestroyView() { super.onDestroyView(); binding = null; } }