Aegis/app/src/main/java/me/impy/aegis/MainActivity.java

package me.impy.aegis;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

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

        btnScan = (Button) findViewById(R.id.button);
        btnScan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent scannerActivity = new Intent(getApplicationContext(), ScannerActivity.class);
                startActivity(scannerActivity);
            }
        });
    }
}