MainActivity.java

package com.example.bony.goti;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.os.Handler;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.appindexing.Thing;
import com.google.android.gms.common.api.GoogleApiClient;


import java.util.logging.LogRecord;

public class MainActivity extends Activity {

private  Button button1,button2,button3,button4;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1=(Button)findViewById(R.id.button);

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent("com.example.bony.goti.MainActivity1");
                startActivity(intent);
            }
        });
        button3=(Button)findViewById(R.id.button3);

        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent("com.example.bony.goti.MainActivity2");
                startActivity(intent);
            }
        });
        button4=(Button)findViewById(R.id.button4);

        button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent("com.example.bony.goti.MainActivity4");
                startActivity(intent);
            }
        });
        button2=(Button)findViewById(R.id.button2);

        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent("com.example.bony.goti.MainActivity5");
                startActivity(intent);
            }
        });


    }

}