MainActivity.java

package net.learn2develop.barcodescanner;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

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

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

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

	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
		IntentResult scanResult = IntentIntegrator.parseActivityResult(
				requestCode, resultCode, intent);
		if (scanResult != null) {
			//---handle scan result---
			Toast.makeText(this, scanResult.getContents(), Toast.LENGTH_LONG).show();
		}
	}
}