MainActivity.java

package me.parzibyte.ejemplolectorqr;

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

import com.blikoon.qrcodescanner.QrCodeActivity;

public class MainActivity extends AppCompatActivity {
    private static final int REQUEST_CODE_QR_SCAN = 101;

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

    public void onClick(View v) {
        Intent i = new Intent(MainActivity.this, QrCodeActivity.class);
        startActivityForResult(i, REQUEST_CODE_QR_SCAN);
    }


}