Android如何更换已弃用的tabhost？

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;

public class NewFragment extends Fragment {

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        // 在这里你可以添加你的View和逻辑
    }
}

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import androidx.fragment.app.FragmentTransaction;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 在Activity中加载我们的新Fragment
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.new_fragment, new NewFragment());
        ft.commit();
    }
}