web-dev-qa-db-fra.com

Valeur de balise d'orientation EXIF ​​toujours 0 pour l'image prise avec l'application appareil photo portrait android

J'ai une application d'appareil photo en mode portrait qui prend des photos à la fois des appareils photo avant et arrière.J'enregistre l'image sur ma carte SD et j'essaie de trouver la valeur exif correspondante qui donne toujours 0, mais j'obtiens l'orientation exif attendue valeur pour les autres images stockées dans l'appareil (comme les images téléchargées).

Comment puis-je réparer cela ? Quelqu'un peut m'aider ?

Voici le code utilisé pour enregistrer l'image et trouver l'orientation

PictureCallback myPictureCallback_JPG = new PictureCallback() {

    @Override
    public void onPictureTaken(byte[] arg0, Camera arg1) {
        // TODO Auto-generated method stub


                try {
                    File APP_FILE_PATH = new File(Environment.getExternalStorageDirectory()
                            .getPath() + "/Myapp/");
                    if (!APP_FILE_PATH.exists()) {
                        APP_FILE_PATH.mkdirs();
                    }
                    File file = new File(APP_FILE_PATH, "image.jpg");

                    FileOutputStream fos = new FileOutputStream(file);
                    fos.write(arg0);
                    fos.close();
imageFileUri=Uri.fromfile(file);                           getApplicationContext().getContentResolver().notifyChange(
                          imageFileUri, null);
                sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,
                            Uri.parse("file://"
                                    + Environment.getExternalStorageDirectory())));
                    ExifInterface exif = new ExifInterface(file.getAbsolutePath());
                    int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);



                } catch (Exception e) {

                }



    }
};

Voici le code pour les fonctions créées et modifiées surphace

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
List<Size> sizes = parameters.getSupportedPreviewSizes();
Size optimalSize = getOptimalPreviewSize(sizes, width, height);
parameters.setPreviewSize(optimalSize.width, optimalSize.height);

camera.setParameters(parameters);
camera.startPreview();
 startPreview();

}
 @Override
 public void surfaceCreated(SurfaceHolder holder) {


 try {

     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Gingerbread) {
          Camera.CameraInfo info=new Camera.CameraInfo();

          for (int i=0; i < Camera.getNumberOfCameras(); i++) {
            Camera.getCameraInfo(i, info);

            if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
              camera=Camera.open(i);
              defaultCameraId = i;
            }
          }
        }

        if (camera == null) {
          camera=Camera.open();
        }




        try {
            camera.setPreviewDisplay(surfaceHolder);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        Camera.Parameters parameters = camera.getParameters();
        Android.hardware.Camera.CameraInfo info =
                new Android.hardware.Camera.CameraInfo();
        Android.hardware.Camera.getCameraInfo(defaultCameraId, info);
        int rotation = this.getWindowManager().getDefaultDisplay()
                .getRotation();
        if (Integer.parseInt(Build.VERSION.SDK) >= 8)
        {

             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;  
             } else {  // back-facing
                 result = (info.orientation - degrees + 360) % 360;
             }
             camera.setDisplayOrientation(result);

        }
        else
        {
            parameters.set("orientation", "portrait");
        }


        camera.setParameters(parameters);



} catch (IllegalArgumentException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (SecurityException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} 


}
 private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
            final double ASPECT_TOLERANCE = 0.1;
            double targetRatio = (double) w / h;
            if (sizes == null) return null;

            Size optimalSize = null;
            double minDiff = Double.MAX_VALUE;

            int targetHeight = h;


            for (Size size : sizes) {
                double ratio = (double) size.width / size.height;
                if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }


            if (optimalSize == null) {
                minDiff = Double.MAX_VALUE;
                for (Size size : sizes) {
                    if (Math.abs(size.height - targetHeight) < minDiff) {
                        optimalSize = size;
                        minDiff = Math.abs(size.height - targetHeight);
                    }
                }
            }
            return optimalSize;
        }
38
hacker

J'ai également rencontré le même problème dans les appareils Samsung, plus tard j'ai implémenté ExifInterface et résolu avec succès.

Dans n'importe quel mode, les images seront prises, elles seront toujours stockées en mode portrait uniquement, et pendant la récupération, elles reviendront également en mode portrait. ci-dessous du code que j'ai utilisé pour atteindre mon objectif, j'ai mis en œuvre dans la caméra arrière, pas sûr de la caméra.

Intention de la caméra @

Intent intent = new Intent(Android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
            startActivityForResult(intent, 1212);   

onActivityResult @

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == 1212) {
        sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory())));
        Bitmap bitmap;
        //bitmap=GlobalMethods.decodeSampledBitmapFromResource(_path, 80, 80);
        bitmap=GlobalMethods.decodeFile(_path);
        if (bitmap == null) {
            imgMed.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.add_photo));
        } 
        else {
            imgMed.setImageBitmap(bitmap);
            imgMed.setScaleType(ScaleType.FIT_XY);

        }
    }
        }

decodeFile @

    public static Bitmap decodeFile(String path) {

          int orientation;

             try {

                 if(path==null){

                     return null;
                 }
                 // decode image size
                 BitmapFactory.Options o = new BitmapFactory.Options();
                 o.inJustDecodeBounds = true;

                 // Find the correct scale value. It should be the power of 2.
                 final int REQUIRED_SIZE = 70;
                 int width_tmp = o.outWidth, height_tmp = o.outHeight;
                 int scale = 4;
                 while (true) {
                     if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE)
                         break;
                     width_tmp /= 2;
                     height_tmp /= 2;
                     scale++;
                 }
                 // decode with inSampleSize
                 BitmapFactory.Options o2 = new BitmapFactory.Options();
                 o2.inSampleSize=scale;
                 Bitmap bm = BitmapFactory.decodeFile(path,o2);


                 Bitmap bitmap = bm;

                 ExifInterface exif = new ExifInterface(path);
                 orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
                 Log.e("orientation",""+orientation);
                 Matrix m=new Matrix();

                 if((orientation==3)){

                 m.postRotate(180);
                 m.postScale((float)bm.getWidth(), (float)bm.getHeight());

//               if(m.preRotate(90)){
                 Log.e("in orientation",""+orientation);

                 bitmap = Bitmap.createBitmap(bm, 0, 0,bm.getWidth(),bm.getHeight(), m, true);
                 return  bitmap;
                 }
                 else if(orientation==6){

                  m.postRotate(90);

                  Log.e("in orientation",""+orientation);

                  bitmap = Bitmap.createBitmap(bm, 0, 0,bm.getWidth(),bm.getHeight(), m, true);
                     return  bitmap;
                 }

                 else if(orientation==8){

                  m.postRotate(270);

                  Log.e("in orientation",""+orientation);

                  bitmap = Bitmap.createBitmap(bm, 0, 0,bm.getWidth(),bm.getHeight(), m, true);
                     return  bitmap;
                 }
                 return bitmap;
             }
             catch (Exception e) {
             }
             return null;
         }
24
RobinHood

Ce problème a été résolu il y a longtemps mais j'ai rencontré quelques difficultés pour faire fonctionner correctement l'appareil photo alors voici ma solution finale, sans utiliser exif. J'espère que cela aidera les autres:

public void startPreview() {
        try {
            Log.i(TAG, "starting preview: " + started);

            // ....
            Camera.CameraInfo camInfo = new Camera.CameraInfo();
            Camera.getCameraInfo(cameraIndex, camInfo);
            int cameraRotationOffset = camInfo.orientation;
            // ...

            Camera.Parameters parameters = camera.getParameters();
            List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes();
            Camera.Size previewSize = null;
            float closestRatio = Float.MAX_VALUE;

            int targetPreviewWidth = isLandscape() ? getWidth() : getHeight();
            int targetPreviewHeight = isLandscape() ? getHeight() : getWidth();
            float targetRatio = targetPreviewWidth / (float) targetPreviewHeight;

            Log.v(TAG, "target size: " + targetPreviewWidth + " / " + targetPreviewHeight + " ratio:" + targetRatio);
            for (Camera.Size candidateSize : previewSizes) {
                float whRatio = candidateSize.width / (float) candidateSize.height;
                if (previewSize == null || Math.abs(targetRatio - whRatio) < Math.abs(targetRatio - closestRatio)) {
                    closestRatio = whRatio;
                    previewSize = candidateSize;
                }
            }

            int rotation = getWindowManager().getDefaultDisplay().getRotation();
            int degrees = 0;
            switch (rotation) {
            case Surface.ROTATION_0:
                degrees = 0;
                break; // Natural orientation
            case Surface.ROTATION_90:
                degrees = 90;
                break; // Landscape left
            case Surface.ROTATION_180:
                degrees = 180;
                break;// Upside down
            case Surface.ROTATION_270:
                degrees = 270;
                break;// Landscape right
            }
            int displayRotation;
            if (isFrontFacingCam) {
                displayRotation = (cameraRotationOffset + degrees) % 360;
                displayRotation = (360 - displayRotation) % 360; // compensate
                                                                    // the
                                                                    // mirror
            } else { // back-facing
                displayRotation = (cameraRotationOffset - degrees + 360) % 360;
            }

            Log.v(TAG, "rotation cam / phone = displayRotation: " + cameraRotationOffset + " / " + degrees + " = "
                    + displayRotation);

            this.camera.setDisplayOrientation(displayRotation);

            int rotate;
            if (isFrontFacingCam) {
                rotate = (360 + cameraRotationOffset + degrees) % 360;
            } else {
                rotate = (360 + cameraRotationOffset - degrees) % 360;
            }

            Log.v(TAG, "screenshot rotation: " + cameraRotationOffset + " / " + degrees + " = " + rotate);

            Log.v(TAG, "preview size: " + previewSize.width + " / " + previewSize.height);
            parameters.setPreviewSize(previewSize.width, previewSize.height);
            parameters.setRotation(rotate);
            camera.setParameters(parameters);
            camera.setPreviewDisplay(mHolder);
            camera.startPreview();

            Log.d(TAG, "preview started");

            started = true;
        } catch (IOException e) {
            Log.d(TAG, "Error setting camera preview: " + e.getMessage());
        }
    }
2
Louis GRIGNON

Le problème est que vous devez mettre les informations exif manuellement dans votre fonction onPictureTaken.

Après avoir enregistré l'image (jpg), vous devez créer une interface Exif et mettre les paramètres vous-même:

....
exif = new ExifInterface(file.getAbsolutePath());
exif.setAttribute(ExifInterface.TAG_ORIENTATION, orientation_detected_by_you_application);
exif.saveAttributes();

Les autres photos que vous avez dans votre téléphone sont faites avec une application qui met les informations exif dans les photos qu'il prend.

Pour détecter l'orientation:

public void enableOrientationListener(){

    if (mOrientationEventListener == null) {            
        mOrientationEventListener = new OrientationEventListener(getContext(), SensorManager.SENSOR_DELAY_NORMAL) {

            @Override
            public void onOrientationChanged(int orientation) {

                // determine our orientation based on sensor response
                int lastOrientation = mOrientation;

                Display display = null;
                if(parentActivity == null){
                    display = ((WindowManager)getContext().getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
                }else{
                    display = parentActivity.getWindowManager().getDefaultDisplay();
                }


                if (display.getOrientation() == Surface.ROTATION_0) {   // landscape oriented devices
                    if (orientation >= 315 || orientation < 45) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_NORMAL) {                         
                            mOrientation = ORIENTATION_LANDSCAPE_NORMAL;
                        }
                    } else if (orientation < 315 && orientation >= 225) {
                        if (mOrientation != ORIENTATION_PORTRAIT_INVERTED) {
                            mOrientation = ORIENTATION_PORTRAIT_INVERTED;
                        }                       
                    } else if (orientation < 225 && orientation >= 135) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_INVERTED) {
                            mOrientation = ORIENTATION_LANDSCAPE_INVERTED;
                        }                       
                    } else if (orientation <135 && orientation > 45) { 
                        if (mOrientation != ORIENTATION_PORTRAIT_NORMAL) {
                            mOrientation = ORIENTATION_PORTRAIT_NORMAL;
                        }                       
                    }                       
                } else {  // portrait oriented devices
                    if (orientation >= 315 || orientation < 45) {
                        if (mOrientation != ORIENTATION_PORTRAIT_NORMAL) {                          
                            mOrientation = ORIENTATION_PORTRAIT_NORMAL;
                        }
                    } else if (orientation < 315 && orientation >= 225) {
                        if (mOrientation != ORIENTATION_LANDSCAPE_NORMAL) {
                            mOrientation = ORIENTATION_LANDSCAPE_NORMAL;
                        }                       
                    } else if (orientation < 225 && orientation >= 135) {
                        if (mOrientation != ORIENTATION_PORTRAIT_INVERTED) {
                            mOrientation = ORIENTATION_PORTRAIT_INVERTED;
                        }                       
                    } else if (orientation <135 && orientation > 45) { 
                        if (mOrientation != ORIENTATION_LANDSCAPE_INVERTED) {
                            mOrientation = ORIENTATION_LANDSCAPE_INVERTED;
                        }                       
                    }
                }
            }
        };
    }
    if (mOrientationEventListener.canDetectOrientation()) {
        mOrientationEventListener.enable();
    }
}


private static final int ORIENTATION_PORTRAIT_NORMAL    =  1;
private static final int ORIENTATION_PORTRAIT_INVERTED  =  2;
private static final int ORIENTATION_LANDSCAPE_NORMAL   =  3;
private static final int ORIENTATION_LANDSCAPE_INVERTED =  4;


public void disableOrientationListener(){
    if(mOrientationEventListener != null){
        mOrientationEventListener.disable();
    }
}

Et vous devez définir mOrientation comme attribut d'orientation pour votre image.

2
ALiGOTec

Vous ignorez une exception à:

    try {
        // Code
        int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
    } catch (Exception e) {

    }

Essayez:

    try {
        // Code
        int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
    } catch (Exception e) {
        e.printStackTrace();
    }

Et après logcat. Il n'est jamais sage de supprimer les exceptions.

0
Binoy Babu