gistfile1.java

private static final int SCAN_QR_CODE_REQUEST_CODE = 0;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
	MenuItem menuItem = menu.add("Log");
	menuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {

		@Override
		public boolean onMenuItemClick(MenuItem item) {
			Intent intent = new Intent("com.google.zxing.client.android.SCAN");
			intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
			startActivityForResult(intent, SCAN_QR_CODE_REQUEST_CODE);
			return false;
		}
	});

	return super.onCreateOptionsMenu(menu);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
	if (requestCode == SCAN_QR_CODE_REQUEST_CODE) {
		if (resultCode == RESULT_OK) {
			String logMsg = intent.getStringExtra("SCAN_RESULT");
			// Weiterverarbeitung..
		}
	}
}