Zxing barcode scanner doesn't open from my app

Question

I've integrated Zxing barcode scanner by adding the package com.google.zxing.integration.android into my project and this code on my MainActivity.java file:

public static Button scanBtn;

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    scanBtn = (Button) findViewById(R.id.scan_button);

    scanBtn.setOnClickListener(this);
}

public void onClick(View v) {
    IntentIntegrator scanIntegrator = new IntentIntegrator(this);
    scanIntegrator.initiateScan();
}

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
    ...
}

For some reason, when I click at the button (scanBtn) nothing happens. There is nothing in the log, and nothing happens on the screen.

Could you please help me?

Answer 1

I've added a permission for the camera and it solved it.