MainActivity.java

package com.YvesB.Nexus;



import android.os.Bundle;    
import android.view.MenuInflater;
import android.view.View;    
import android.view.View.OnClickListener;    
import android.widget.Button;    
import android.widget.PopupMenu;
import android.app.Activity;  
import android.content.Intent;    
    
public class MainActivity extends Activity {    
    @Override    
    public void onCreate(Bundle savedInstanceState) {    
        super.onCreate(savedInstanceState);    
        setContentView(R.layout.activity_main);   

        Button btnuno=(Button)findViewById(R.id.button1);    
        

        btnuno.setOnClickListener(new OnClickListener(){    
                                       public void onClick(View arg0) {    
                                       Intent openPage0 = new Intent(MainActivity.this,Page0.class);  
                 
                      startActivity(openPage0);  
                    }   
        });
    }
}