以Fragment布局显示ZXING条形码扫描仪

// 扫描Fragment类
public class ScanFragment extends Fragment implements ZXingScannerView.ResultHandler {
    private ZXingScannerView scannerView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        scannerView = new ZXingScannerView(getActivity());
        return scannerView;
    }

    @Override
    public void onResume() {
        super.onResume();
        scannerView.setResultHandler(this);
        scannerView.startCamera();
    }

    @Override
    public void onPause() {
        super.onPause();
        scannerView.stopCamera();
    }

    @Override
    public void handleResult(Result result) {
        // 处理扫描结果
        Toast.makeText(getActivity(), result.getText(), Toast.LENGTH_SHORT).show();
        // 继续扫描
        scannerView.resumeCameraPreview(this);
    }
}

// Activity类
public class MainActivity extends AppCompatActivity {
    private FrameLayout container;

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

        container = findViewById(R.id.container);

        // 创建并添加扫描Fragment
        ScanFragment scanFragment = new ScanFragment();
        getSupportFragmentManager().beginTransaction()
                .add(container.getId(), scanFragment)
                .commit();
    }
}