Листинг программы Barcode Scanner Library

ScanActivity.java package info.androidhive.movietickets;   import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.SparseArray; import android.widget.Toast;   import com.google.android.gms.vision.barcode.Barcode;   import java.util.List;   import info.androidhive.barcode.BarcodeReader;   public class ScanActivity extends AppCompatActivity implements BarcodeReader.BarcodeReaderListener {       BarcodeReader barcodeReader;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_scan);           // get the barcode reader instance         barcodeReader = (BarcodeReader) getSupportFragmentManager().findFragmentById(R.id.barcode_scanner);     }       @Override     public void onScanned(Barcode barcode) {           // playing barcode reader beep sound         barcodeReader.playBeep();           // ticket details activity by passing barcode         Intent intent = new Intent(ScanActivity.this, TicketActivity.class);         intent.putExtra("code", barcode.displayValue);         startActivity(intent);     }       @Override     public void onScannedMultiple(List list) {       }       @Override     public void onBitmapScanned(SparseArray sparseArray) {       }       @Override     public void onCameraPermissionDenied() {         finish();     }       @Override     public void onScanError(String s) {         Toast.makeText(getApplicationContext(), "Error occurred while scanning " + s, Toast.LENGTH_SHORT).show();     } }