MainActivity for QRCode

package info.rekayasa.qrcodescanner;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.Result;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

import me.dm7.barcodescanner.zxing.ZXingScannerView;


public class MainActivity1 extends AppCompatActivity {

    private ZXingScannerView mScannerView;
    public static final int MY_PERMISSIONS_REQUEST_CAMERA = 42;

    TextView tvResult;

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

        tvResult = (TextView)findViewById(R.id.tvResult);
    }

    public void QrScanner(View view){

        // check Android 6 permission
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
                == PackageManager.PERMISSION_GRANTED) {

            IntentIntegrator integrator = new IntentIntegrator(MainActivity1.this);
            integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
            integrator.setPrompt("Scan");
            integrator.setCameraId(0);
            integrator.setBeepEnabled(false);
            integrator.setBarcodeImageEnabled(false);
            integrator.initiateScan();

        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.CAMERA},
                    MY_PERMISSIONS_REQUEST_CAMERA);
        }

    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        if (result != null){
            if (result.getContents() == null){
                Toast.makeText(this, "Canclled", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(this, "Scanned: " + result.getContents(), Toast.LENGTH_LONG).show();
                tvResult.setText(result.getContents());
            }
        } else {
            super.onActivityResult(requestCode, resultCode, data);
        }

    }

    @Override
    public void onPause() {
        super.onPause();
//        mScannerView.stopCamera();   // Stop camera on pause
    }

}