android studio调用摄像头并获取图像数据步骤

调用摄像头并获取图像数据的步骤如下：

1. 在Android Studio中创建一个新的项目，并在AndroidManifest.xml文件中添加相机的权限声明：

<uses-permission android:name="android.permission.CAMERA" />

2. 在MainActivity中创建一个SurfaceView来预览相机捕获的图像，并添加相机权限的检查：

SurfaceView surfaceView;
Camera camera;

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

    surfaceView = findViewById(R.id.surfaceView);

    if (checkCameraPermission()) {
        setupCamera();
    }
}

private boolean checkCameraPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
        return false;
    }
    return true;
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    if (requestCode == 1) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            setupCamera();
        } else {
            Toast.makeText(this, "Camera permission denied", Toast.LENGTH_SHORT).show();
        }
    }
}

private void setupCamera() {
    camera = Camera.open();
    Camera.Parameters parameters = camera.getParameters();
    camera.setParameters(parameters);
    camera.setDisplayOrientation(90);
    camera.setPreviewDisplay(surfaceView.getHolder());
    camera.startPreview();
}

3. 在onDestroy生命周期方法中释放相机资源：

@Override
protected void onDestroy() {
    super.onDestroy();
    if (camera != null) {
        camera.release();
        camera = null;
    }
}

通过以上步骤，就可以在Android Studio中调用摄像头并获取图像数据。