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implementation 'cn.bingoogolapple:bga-qrcode-zxing:1.3.4'

public class ScanActivity extends AppCompatActivity implements QRCodeView.Delegate{

    private ZXingView zXingView;

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

        zXingView = findViewById(R.id.zxing);

        zXingView.setDelegate(this);
    }

    @Override
    protected void onResume() {
        super.onResume();
        zXingView.startCamera();

    }

    @Override
    protected void onStop() {
        super.onStop();
        zXingView.stopCamera();
    }

    @Override
    public void onScanQRCodeSuccess(String result) {

    }

    @Override
    public void onCameraAmbientBrightnessChanged(boolean isDark) {

    }

    @Override
    public void onScanQRCodeOpenCameraError() {

    }