android button按钮页面切换问题

Question

一个按钮可以切换，两个按钮切换两个不同页面应该怎么写呢？点击button4，从TwoActivity跳到FourActivity

 package com.example.ricky.myapplication;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class TwoActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.two);
        Button btn3=(Button)findViewById(R.id.button3);
        btn3.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View V){
                Intent intent=new Intent(TwoActivity.this,ThreeActivity.class);
                startActivity(intent);
            }
        });
    }
}

Answer 1

 Button btn4=(Button)findViewById(R.id.button4);
        btn4.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View V){
                Intent intent=new Intent(TwoActivity.this,ThreeActivity.class);
                startActivity(intent);
            }
        });
    }

再写一个不就可以了吗