帮我生成一段完整的Android代码，运用静态fragment，用两个按钮切换两段新闻，两段新闻用new1和new2代替。

以下是使用静态fragment实现在两个按钮之间切换新闻的完整Android代码：

MainActivity.java

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

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

public class MainActivity extends AppCompatActivity {

    private Button btnNew1, btnNew2;

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

        btnNew1 = findViewById(R.id.btn_new1);
        btnNew2 = findViewById(R.id.btn_new2);

        // 设置默认Fragment
        setDefaultFragment();

        // 监听按钮点击事件
        btnNew1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                replaceFragment(new New1Fragment());
            }
        });

        btnNew2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                replaceFragment(new New2Fragment());
            }
        });
    }

    // 设置默认Fragment
    private void setDefaultFragment() {
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.replace(R.id.fragment_container, new New1Fragment());
        transaction.commit();
    }

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

BaseFragment.java

import androidx.fragment.app.Fragment;

public abstract class BaseFragment extends Fragment {

    // 子类实现该方法，返回布局ID
    protected abstract int getLayoutId();
}

New1Fragment.java

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class New1Fragment extends BaseFragment {

    @Override
    protected int getLayoutId() {
        return R.layout.fragment_new1;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(getLayoutId(), container, false);
    }
}

New2Fragment.java

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class New2Fragment extends BaseFragment {

    @Override
    protected int getLayoutId() {
        return R.layout.fragment_new2;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(getLayoutId(), container, false);
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/btn_new1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New1"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="50dp"
        android:layout_marginTop="50dp"/>

    <Button
        android:id="@+id/btn_new2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New2"
        android:layout_alignTop="@id/btn_new1"
        android:layout_alignRight="@id/btn_new1"
        android:layout_marginRight="50dp"/>

    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/btn_new1"
        android:layout_marginTop="50dp"/>

</RelativeLayout>

fragment_new1.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="New1"/>

fragment_new2.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:text="New2"/>