使用自定义相机拍摄的图像方向错误

Question

我创建了自定义相机活动，但拍摄的图像方向错误。当我在纵向模式下拍摄图像并将其旋转90度后。它处于原始位置，但在横向模式下以错误方向拍摄图像。

相机方向在纵向模式下捕获图像时

用于解决相机预览问题。

public int setPhotoOrientation(Activity activity, int cameraId) {
        android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
        android.hardware.Camera.getCameraInfo(cameraId, info);
        int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
        int degrees = 0;
        switch (rotation) {
            case Surface.ROTATION_0:
                degrees = 0;
                break;
            case Surface.ROTATION_90:
                degrees = 90;
                break;
            case Surface.ROTATION_180:
                degrees = 180;
                break;
            case Surface.ROTATION_270:
                degrees = 270;
                break;
        }

        int result;
        // do something for phones running an SDK before lollipop
        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
            result = (info.orientation + degrees) % 360;
            result = (360 - result) % 360; // compensate the mirror
        } else { // back-facing
            result = (info.orientation - degrees + 360) % 360;
        }

        return result;
    }

检查位图方向。

private Bitmap imageOreintationValidator(Bitmap bitmap, String path) {

        ExifInterface ei;
        try {
            ei = new ExifInterface(path);
            int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION,
                    ExifInterface.ORIENTATION_NORMAL);
            switch (orientation) {
            case ExifInterface.ORIENTATION_ROTATE_90:
                bitmap = rotateImage(bitmap, 90);
                rot++;
                break;
            case ExifInterface.ORIENTATION_ROTATE_180:
                bitmap = rotateImage(bitmap, 180);
                rot++;
                break;
            case ExifInterface.ORIENTATION_ROTATE_270:
                bitmap = rotateImage(bitmap, 270);
                rot++;
                break;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return bitmap;
    }

Answer 1

终于找到了解决办法。使用方向传感器检查方向，根据角度找到角度，并使用该角度旋转生成的图像。

public abstract class SimpleOrientationListener extends OrientationEventListener {

    public static final int CONFIGURATION_ORIENTATION_UNDEFINED = Configuration.ORIENTATION_UNDEFINED;
    private volatile int defaultScreenOrientation = CONFIGURATION_ORIENTATION_UNDEFINED;
    public int prevOrientation = OrientationEventListener.ORIENTATION_UNKNOWN;
    private Context ctx;
    private ReentrantLock lock = new ReentrantLock(true);

    public SimpleOrientationListener(Context context) {
        super(context);
        ctx = context;
    }

    public SimpleOrientationListener(Context context, int rate) {
        super(context, rate);
        ctx = context;
    }

    @Override
    public void onOrientationChanged(final int orientation) {


        int currentOrientation = OrientationEventListener.ORIENTATION_UNKNOWN;
        int angle=0;
        if (orientation >= 330 || orientation < 30) {
            currentOrientation = Surface.ROTATION_0;
            angle=90;
        } else if (orientation >= 60 && orientation < 120) {
            currentOrientation = Surface.ROTATION_90;
            angle=180;
        } else if (orientation >= 150 && orientation < 210) {
            currentOrientation = Surface.ROTATION_180;
            angle=270;
        } else if (orientation >= 240 && orientation < 300) {
            currentOrientation = Surface.ROTATION_270;
            angle=360;
        }
        getset g = new getset();
        g.setK(angle);
        if (prevOrientation != currentOrientation && orientation != OrientationEventListener.ORIENTATION_UNKNOWN) {
            prevOrientation = currentOrientation;
            if (currentOrientation != OrientationEventListener.ORIENTATION_UNKNOWN)
                reportOrientationChanged(currentOrientation);
        }

    }

    private void reportOrientationChanged(final int currentOrientation) {

        int defaultOrientation = getDeviceDefaultOrientation();
        int orthogonalOrientation = defaultOrientation == Configuration.ORIENTATION_LANDSCAPE ? Configuration.ORIENTATION_PORTRAIT
                : Configuration.ORIENTATION_LANDSCAPE;

        int toReportOrientation;

        if (currentOrientation == Surface.ROTATION_0 || currentOrientation == Surface.ROTATION_180)
            toReportOrientation = defaultOrientation;
        else
            toReportOrientation = orthogonalOrientation;

        onSimpleOrientationChanged(toReportOrientation);
    }

    /**
     * Must determine what is default device orientation (some tablets can have default landscape). Must be initialized when device orientation is defined.
     *
     * @return value of {@link Configuration#ORIENTATION_LANDSCAPE} or {@link Configuration#ORIENTATION_PORTRAIT}
     */
    private int getDeviceDefaultOrientation() {
        if (defaultScreenOrientation == CONFIGURATION_ORIENTATION_UNDEFINED) {
            lock.lock();
            defaultScreenOrientation = initDeviceDefaultOrientation(ctx);
            lock.unlock();
        }
        return defaultScreenOrientation;
    }

    /**
     * Provides device default orientation
     *
     * @return value of {@link Configuration#ORIENTATION_LANDSCAPE} or {@link Configuration#ORIENTATION_PORTRAIT}
     */
    private int initDeviceDefaultOrientation(Context context) {

        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Configuration config = context.getResources().getConfiguration();
        int rotation = windowManager.getDefaultDisplay().getRotation();

        boolean isLand = config.orientation == Configuration.ORIENTATION_LANDSCAPE;
        boolean isDefaultAxis = rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180;

        int result = CONFIGURATION_ORIENTATION_UNDEFINED;
        if ((isDefaultAxis && isLand) || (!isDefaultAxis && !isLand)) {
            result = Configuration.ORIENTATION_LANDSCAPE;
        } else {
            result = Configuration.ORIENTATION_PORTRAIT;
        }
        return result;
    }

    /**
     * Fires when orientation changes from landscape to portrait and vice versa.
     *
     * @param orientation value of {@link Configuration#ORIENTATION_LANDSCAPE} or {@link Configuration#ORIENTATION_PORTRAIT}
     */
    public abstract void onSimpleOrientationChanged(int orientation);

}

用于设置预览的摄影机方向。

public static int setCameraDisplayOrientation(Activity activity, int cameraId, android.hardware.Camera camera) {
        android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
        android.hardware.Camera.getCameraInfo(cameraId, info);
        int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
        int degrees = 0;
        switch (rotation) {
            case Surface.ROTATION_0:
                degrees = 0;
                break;
            case Surface.ROTATION_90:
                degrees = 90;
                break;
            case Surface.ROTATION_180:
                degrees = 180;
                break;
            case Surface.ROTATION_270:
                degrees = 270;
                break;
        }

        int result;
        //int currentapiVersion = android.os.Build.VERSION.SDK_INT;
        // do something for phones running an SDK before lollipop
        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
            result = (info.orientation + degrees) % 360;
            result = (360 - result) % 360; // compensate the mirror
        } else { // back-facing
            result = (info.orientation - degrees + 360) % 360;
        }

        return result;

    }