Android的 - 摄像头提供一些设备后置摄像头的倒挂数据

Question

我渲染camera preview上GLSurfaceView一切工作正常，但camera preview显示倒挂一些设备专门在Nexus 5X上。我已经检查这个解决方案Android - Camera preview is sideways。这是我处理问题的方向代码

 private void setCameraDisplayOrientation() {
    Constants.debugLog(TAG_DEBUG, "setCameraDisplayOrientation");
    Constants.debugLog(TAG, "setCameraDisplayOrientation ");

    if (camera == null) {
        Constants.debugLog(TAG + " Owncamera", "setCameraDisplayOrientation - camera null");
        return;
    }

    Camera.CameraInfo info = new Camera.CameraInfo();
    Camera.getCameraInfo(currentCameraId, info);

    WindowManager winManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    int rotation = winManager.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;
    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;
    }

    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
        this.cameraOrientation = 2;
    } else if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
        this.cameraOrientation = 1;
    }

    Constants.debugLog(TAG_DEBUG, "result: " + result + "  this.cameraOrientation == " + this.cameraOrientation);
    Constants.debugLog(TAG, "result: " + result + "  this.cameraOrientation == " + this.cameraOrientation);
    //Log.e("camera_orient", "res: "+ result);
    camera.setDisplayOrientation(result);
}

从Camera.CameraInfo info类，我可以得到orientation。为了获得最大的设备我得到portrait mode的价值是“for front camera = 270, back camera = 90‘’但Nexus 5X它提供camera orientation 270270两个正面和背面摄像头。除了在其他设备上我的相机在人像模式，但对于result的正面和背面摄像头提供Nexus 5x值90前置摄像头90后置摄像头270我也通过设置camera.setDisplayOrientation(90); Nexus 5X保护装置固定90值尝试，但不工作如何处理这个问题，使所有设备摄像头的方向将是相同的，我不会得到任何旋转的图像？ ？

Answer 1

尝试

1.首先，添加方法（WriteFile的，processImage来和getCorrectCameraOrientation）如下所定义

拍摄照片和更新onPictureTaken之后2.计算相机方向**

@Override
public void onPictureTaken (final byte[] data, final Camera camera) {

    int rotationAngle = getCorrectCameraOrientation (this, info);

3.创建文件，并使用rotationAngle更新照片角

File file = new File (folder, fileName);

try {
    file.createNewFile ();
}
catch (IOException e) {
    e.printStackTrace ();
}

writeFile (data, file);
processImage (file, rotationAngle, compressRatio);

WriteFile的

public static void writeFile (byte[] data, File file) throws IOException {

    BufferedOutputStream bos = null;

    try {
        FileOutputStream fos = new FileOutputStream (file);
        bos = new BufferedOutputStream (fos);
        bos.write (data);
    }
    finally {
        if (bos != null) {
            try {
                bos.flush ();
                bos.close ();
            }
            catch (Exception e) {
            }
        }
    }
}

processImage来

public static void processImage (File file, int rotationAngle, int compressionRatio) {

    BufferedOutputStream bos = null;

    try {

        Bitmap bmp = BitmapFactory.decodeFile (file.getPath ());

        Matrix matrix = new Matrix ();
        matrix.postRotate (rotationAngle);

        bmp = Bitmap.createBitmap (bmp, 0, 0, bmp.getWidth (), bmp.getHeight (), matrix, true);

        FileOutputStream fos = new FileOutputStream (file);
        bmp.compress (Bitmap.CompressFormat.PNG, compressionRatio, fos);
    }
    catch (IOException e) {
        e.printStackTrace ();
    }
    catch (OutOfMemoryError t) {
        t.printStackTrace ();
    }
    catch (Throwable t) {
        t.printStackTrace ();
    }
    finally {
        if (bos != null) {
            try {
                bos.flush ();
                bos.close ();
            }
            catch (Exception e) {
            }
        }
    }
}

getCorrectCameraOrientation

    public static int getCorrectCameraOrientation (Activity activity, Camera.CameraInfo info) {

    int rotation = activity.getWindowManager ().getDefaultDisplay ().getRotation ();
    int degrees = 0;

    if (hasValidRotation (rotation)) {
        degrees = rotation * 90;
    }

    int result;
    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
        result = (info.orientation + degrees) % 360;
        result = (360 - result) % 360;
    }
    else {
        result = (info.orientation - degrees + 360) % 360;
    }

    return result;
}

Answer 2

问题原因：默认情况下，最大的设备在使用相机API 1.返回与90度的默认方向的图像我在用照相机API 2的情况下，我不知道这不过在Nexus 5X保护和一些罕见的设备的情况下（利用摄像头API 1），它返回图像具有270度默认的旋转这是一些特定的模型装置上的特殊情况。所以你要添加的180度的Nexus 5X的另外旋转。请检查印刷的Nexus 5X的形象定位的日志。