zhibo/android-app/app/src/main/java/com/example/livestreaming/ProfileActivity.java

package com.example.livestreaming;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import com.example.livestreaming.databinding.ActivityProfileBinding;
import com.google.android.material.bottomnavigation.BottomNavigationView;

public class ProfileActivity extends AppCompatActivity {

    private ActivityProfileBinding binding;

    public static void start(Context context) {
        Intent intent = new Intent(context, ProfileActivity.class);
        context.startActivity(intent);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityProfileBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());

        BottomNavigationView bottomNavigation = binding.bottomNavInclude.bottomNavigation;
        bottomNavigation.setSelectedItemId(R.id.nav_profile);
        bottomNavigation.setOnItemSelectedListener(item -> {
            int id = item.getItemId();
            if (id == R.id.nav_home) {
                startActivity(new Intent(this, MainActivity.class));
                finish();
                return true;
            }
            if (id == R.id.nav_friends) {
                startActivity(new Intent(this, FishPondActivity.class));
                finish();
                return true;
            }
            if (id == R.id.nav_wish_tree) {
                WishTreeActivity.start(this);
                finish();
                return true;
            }
            if (id == R.id.nav_messages) {
                MessagesActivity.start(this);
                finish();
                return true;
            }
            return true;
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (binding != null) {
            binding.bottomNavInclude.bottomNavigation.setSelectedItemId(R.id.nav_profile);
        }
    }
}