帮我生成一段安卓代码，运用动态fragment使用四个按钮来切换我的NAME（祝杭杰）,AGE（21）,STUDENT ID（2020329621145）,和HOBBY（rap）

以下是使用动态fragment切换四个不同的信息的示例代码：

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btnName, btnAge, btnId, btnHobby;

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

        btnName = findViewById(R.id.btn_name);
        btnAge = findViewById(R.id.btn_age);
        btnId = findViewById(R.id.btn_id);
        btnHobby = findViewById(R.id.btn_hobby);

        btnName.setOnClickListener(this);
        btnAge.setOnClickListener(this);
        btnId.setOnClickListener(this);
        btnHobby.setOnClickListener(this);

        // 默认显示姓名
        replaceFragment(new NameFragment());
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_name:
                replaceFragment(new NameFragment());
                break;
            case R.id.btn_age:
                replaceFragment(new AgeFragment());
                break;
            case R.id.btn_id:
                replaceFragment(new IdFragment());
                break;
            case R.id.btn_hobby:
                replaceFragment(new HobbyFragment());
                break;
            default:
                break;
        }
    }

    private void replaceFragment(Fragment fragment) {
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.fragment_container, fragment);
        transaction.commit();
    }
}

activity_main.xml

<FrameLayout
    android:id="@+id/fragment_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|center_horizontal"
    android:orientation="horizontal"
    android:padding="16dp">

    <Button
        android:id="@+id/btn_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Name" />

    <Button
        android:id="@+id/btn_age"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Age"
        android:layout_marginStart="16dp" />

    <Button
        android:id="@+id/btn_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ID"
        android:layout_marginStart="16dp" />

    <Button
        android:id="@+id/btn_hobby"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hobby"
        android:layout_marginStart="16dp" />

</LinearLayout>

NameFragment.java

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

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

public class NameFragment extends Fragment {

    private TextView tvInfo;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_info, container, false);
        tvInfo = view.findViewById(R.id.tv_info);
        tvInfo.setText("祝杭杰");
        return view;
    }
}

AgeFragment.java、IdFragment.java、HobbyFragment.java与NameFragment.java类似，只需要修改对应的信息即可。具体示例代码可以参考上面的代码进行修改。