使用cameraX的PreviewView捕获覆盖图

public class CameraActivity extends AppCompatActivity {

    private PreviewView previewView;
    private Preview preview;

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

        previewView = findViewById(R.id.previewView);

        // 请求相机权限
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
        } else {
            setupCamera();
        }
    }

    private void setupCamera() {
        PreviewConfig previewConfig = new PreviewConfig.Builder().setTargetResolution(new Size(1280, 720)).build();
        preview = new Preview(previewConfig);

        preview.setOnPreviewOutputUpdateListener(output -> {
            ViewGroup parent = (ViewGroup) previewView.getParent();
            if (parent != null) {
                parent.removeView(previewView);
            }
            previewView = new PreviewView(this);
            previewView.setSurfaceTexture(output.getSurfaceTexture());
            parent.addView(previewView, 0);
        });

        CameraX.bindToLifecycle(this, preview);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUEST_CAMERA_PERMISSION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                setupCamera();
            } else {
                Toast.makeText(this, "Camera permission is required", Toast.LENGTH_SHORT).show();
            }
        }
    }
}