package com.melodies.bandup;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

/**
 * Created by Rafael on 5.9.2016.
 */
public class Instruments extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_instruments);
    }


}

package com.melodies.bandup;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class Instruments extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_instruments);
    }
}

Update Instruments.java