Develop Reference

Camera Source (Google Mobile Vision) returns rotated image on some devices

I have the open sourced code for the Google Mobile Vision - CameraSource and this is the method I call to click a photo : cameraSource.takePicture();
In the open sourced version of CameraSource.java, the method for determining screen orientation is the stock one:
private void setRotation(Camera camera, Camera.Parameters parameters, int cameraId) {
WindowManager windowManager =
(WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
int degrees = 0;
int rotation = windowManager.getDefaultDisplay().getRotation();
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;
default:
Log.e(TAG, "Bad rotation value: " + rotation);
}
CameraInfo cameraInfo = new CameraInfo();
Camera.getCameraInfo(cameraId, cameraInfo);
int angle;
int displayAngle;
if (cameraInfo.facing == CameraInfo.CAMERA_FACING_FRONT) {
angle = (cameraInfo.orientation + degrees) % 360;
displayAngle = (360 - angle) % 360; // compensate for it being mirrored
} else { // back-facing
angle = (cameraInfo.orientation - degrees + 360) % 360;
displayAngle = angle;
}
// This corresponds to the rotation constants in {#link Frame}.
mRotation = angle / 90;
camera.setDisplayOrientation(displayAngle);
parameters.setRotation(angle);
}
Here, the displayAngle and the angle are the same for Samsung, Lenovo and Yuntab H8. But the bitmap returned for backCamera is rotated differently in each of the device. I have to manually rotate the bitmap for each of the devices (Samsung : 90, Lenovo : 0 and Yuntab : 180)
My requirement is that onPictureTaken should return a bitmap which matches the current display orientation. I am looking into this, since a long time but yet have to figure a way to the solution. Here below is my onPicturetaken() (called after taking picture):
#Override
public void onPictureTaken(byte[] bytes) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length, currentCameraId == 0 ? options : null);
}catch (Exception ex){
ex.printStackTrace();
Log.e("PictureTaken",ex.toString());
}
};

You should rotate the image when it is already saved in the device.
Then you can rotate it to match the position it was when the photo was taken.
Example code (It might need some cleanup and improvement, but it works...):
Method do calculate the rotation an image has:
private static int rotationNeeded(String path) {
try {
File file = new File(path);
if (!file.getName().contains(".jpg")) {
return 0;
}
ExifInterface exif = new ExifInterface(file.getAbsolutePath());
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
if (orientation == ExifInterface.ORIENTATION_ROTATE_270) {
return 270;
}
if (orientation == ExifInterface.ORIENTATION_ROTATE_180) {
return 180;
}
if (orientation == ExifInterface.ORIENTATION_ROTATE_90) {
return 90;
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return 0;
}
Apply the rotation needed to the image:
public static void rotateImage(String filePath) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
//check image rotation
int rotate = rotationNeeded(filePath);
if (rotate != 0) {
//rotate image if needed
Matrix matrix = new Matrix();
matrix.postRotate(rotate);
Bitmap rotatedImage = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
bitmap.getHeight(), matrix, true);
bitmap.recycle();
bitmap = rotatedImage;
//save image
byte[] dataPicture = bao.toByteArray();
FileOutputStream fos = new FileOutputStream(filePath);
fos.write(dataPicture);
fos.flush();
fos.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}

Reliable method for getting properly rotated bitmap from camera/gallery

This is an issue that has plagued me for MONTHS. I've seen all the SO posts there are about rotating an image chosen from the gallery or taken via image capture intent, but none have worked. The big offender is, of course, Samsung devices, but I've even seen some funky behavior on my Nexus.
I'm using intents to choose images from gallery and camera, but it seems that landscape photos always seem to come in rotated 90 degrees. The first step is always ExifInterface, something like this:
ExifInterface exif = new ExifInterface(imageUri.getLastPathSegment();
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
int rotationNeeded = getRotationFromExifData(orientation);
Matrix matrix = new Matrix();
matrix.setRotate(rotationNeeded);
Where getRotationFromExifData(orientation) is:
private static int getRotationFromExifData(int orientation) {
Log.d(LOG_TAG, "Orientation: " + orientation);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
Log.d(LOG_TAG, "Exif returned 90");
return 90;
case ExifInterface.ORIENTATION_ROTATE_180:
Log.d(LOG_TAG, "Exif returned 180");
return 180;
case ExifInterface.ORIENTATION_ROTATE_270:
Log.d(LOG_TAG, "Exif returned 270");
return 270;
default: // Normal or 0
Log.d(LOG_TAG, "Exif returned 0");
return 0;
}
}
This doesn't work, ExifInterface (from what I'm seeing) always returns 0 (or normal), especially on Samsung devices.
Other steps include querying the MediaStore and other junk that doesn't work. Can somebody please tell me what the exact way to get proper image rotation using all native Intents, so all images are displayed correctly? Thanks in advance.

Not sure about the photos selected from gallery but for that taken directly from camera, you can try this:
In your activity/fragment to capture a photo, try adding and enabling an OrientationEventListener in onResume(), and disabling it in onPause().
Here is the onResume()
#Override
public void onResume() {
super.onResume();
orientationListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL) {
#Override
public void onOrientationChanged(int angle) {
if (angle > 315 || angle <= 45) {
rotation = 90;
} else if (angle > 45 && angle <= 135) {
rotation = 180;
} else if (angle > 135 && angle <= 225) {
rotation = 270;
} else if (angle > 225 && angle <= 315) {
rotation = 0;
} else {
rotation = -1;// UNKNOWN
}
if (currentFacing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
rotation = (360 - rotation) % 360;
}
Log.i("Orientation", "rotation = " + rotation);
}
};
if (orientationListener.canDetectOrientation()) {
orientationListener.enable();
}
}
Here is the onPause()
#Override
public void onPause() {
//...
orientationListener.disable();
super.onPause();
}
When you take the photo using your camera, use that rotation to rotate the bitmap accordingly, as following:
camera.takePicture(null, null, null, new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap theBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
if (rotation != -1) {
Matrix matrix = new Matrix();
matrix.postRotate(rotation);
theBitmap = Bitmap.createBitmap(theBitmap, 0, 0, theBitmap.getWidth(), theBitmap.getHeight(), matrix, false);
}
// Save the bitmap here...
}
}
Hope this helps.

Camera preview is in portrait mode but image captured is rotated

I am trying to capture a photo using the camera. The preview by default was in landscape mode which i could change it to portrait mode using
setCameraDisplayOrientation(this,1, mCamera);
public static void 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;
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;
}
camera.setDisplayOrientation(result);
}
The image captured is stored under a folder myImages. But the images is rotated. (look's like the image is captured in landscape mode)
So how can i rotate the image captured and save the same?
public class MainActivity extends Activity {
private static final int REQUEST_CODE = 1;
ImageView imageView;
Button b;
private Camera mCamera;
private CameraPreview mPreview;
private Bitmap bitmap;
private PictureCallback mPicture;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
boolean check =checkCameraHardware(MainActivity.this);
if(check)
{
mCamera = getCameraInstance();
// mCamera.setDisplayOrientation(90);
setCameraDisplayOrientation(this,
1, mCamera);//requires min sdk 9
}
// Create an instance of Camera
mPicture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
File imagesFolder = new File(Environment.getExternalStorageDirectory(), "MyImages");
if(!imagesFolder.exists())
imagesFolder.mkdirs();
File pictureFile = new File(imagesFolder, "image.jpg");
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
System.out.println("hello");
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
Log.d("No File", "File not found: " + e.getMessage());
} catch (IOException e) {
//Log.d(TAG, "Error accessing file: " + e.getMessage());
}
}
};
// Create our Preview view and set it as the content of our activity.
mPreview = new CameraPreview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mPreview);
b = (Button) findViewById(R.id.button_capture);
b.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
mCamera.takePicture(null, null, mPicture);
Toast.makeText(MainActivity.this, "Called",1000).show();
}
});
}
public static void 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;
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;
}
camera.setDisplayOrientation(result);
}
private boolean checkCameraHardware(Context context) {
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)){
// this device has a camera
Toast.makeText(this, "Phone has camera", Toast.LENGTH_LONG).show();
return true;
} else {
// no camera on this device
Toast.makeText(this, "Phone has no camera", Toast.LENGTH_LONG).show();
return false;
}
}
public static Camera getCameraInstance(){
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
}
catch (Exception e){
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}
#Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mCamera.release();
}
}
The CameraPreview class is the same from the developer site http://developer.android.com/guide/topics/media/camera.html
Note: I am using the back camera not the front facing camera.

I faced the same problem when taking photo from camera in portrait mode. Below lines of code solved my problem:
public static void 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;
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;
}
camera.setDisplayOrientation(result);
}
Call setCameraDisplayOrientation() method in surfaceCreated callback as the following:
#Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
setCameraDisplayOrientation(getActivity(), CameraInfo.CAMERA_FACING_BACK, camera);
}
I had to rotate the image in Camera onPictureTaken() callback:
camera.takePicture(null, null, new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
if (data != null) {
int screenWidth = getResources().getDisplayMetrics().widthPixels;
int screenHeight = getResources().getDisplayMetrics().heightPixels;
Bitmap bm = BitmapFactory.decodeByteArray(data, 0, (data != null) ? data.length : 0);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
// Notice that width and height are reversed
Bitmap scaled = Bitmap.createScaledBitmap(bm, screenHeight, screenWidth, true);
int w = scaled.getWidth();
int h = scaled.getHeight();
// Setting post rotate to 90
Matrix mtx = new Matrix();
mtx.postRotate(90);
// Rotating Bitmap
bm = Bitmap.createBitmap(scaled, 0, 0, w, h, mtx, true);
}else{// LANDSCAPE MODE
//No need to reverse width and height
Bitmap scaled = Bitmap.createScaledBitmap(bm, screenWidth,screenHeight , true);
bm=scaled;
}
photoPreview.setImageBitmap(bm);
}
isImageCaptured = true;
photoPreview.setVisibility(View.VISIBLE);
surfaceView.setVisibility(View.GONE);
}
});

Below code worked for me for Front facing camera.
if (data != null) {
try {
int screenWidth = getResources().getDisplayMetrics().widthPixels;
int screenHeight = getResources().getDisplayMetrics().heightPixels;
bm = BitmapFactory.decodeByteArray(data, 0,
(data != null) ? data.length : 0);
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(cameraFace, info);
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
// Notice that width and height are reversed
// Bitmap scaled = Bitmap.createScaledBitmap(bm,
// screenHeight, screenWidth, true);
// int w = scaled.getWidth();
// int h = scaled.getHeight();
// Setting post rotate to 90
Matrix mtx = new Matrix();
mtx.postRotate(90);
if (cameraFace == CameraInfo.CAMERA_FACING_FRONT)
mtx.postRotate(180);
// Rotating Bitmap
bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
bm.getHeight(), mtx, true);
} else {// LANDSCAPE MODE
Bitmap scaled = Bitmap.createScaledBitmap(bm,
screenWidth, screenHeight, true);
bm = scaled;
}
} catch (Exception e) {
} catch (Error e) {
}
}

Yes, I tried the way in the answer, it works for back camera, for front camera, it need to rotate 270 not 90. :)

Controlling the camera to take pictures in portrait doesn't rotate the final images

I'm trying to controlling the Android camera to take pictures in a portrait app, but when I save the picture, it's in landscape. I've rotated the image 90 grades with setCameraDisplayOrientation() method, but doesn't work.
Then I've found this post but the TAG_ORIENTATION is 0 (undefined). If I catch this value and apply a rotation value, doesn't work either.
How I can take a photo in portrait and save it with a good orientation?
/** Initializes the back/front camera */
private boolean initPhotoCamera() {
try {
camera = getCameraInstance(selected_camera);
Camera.Parameters parameters = camera.getParameters();
// parameters.setPreviewSize(width_video, height_video);
// parameters.set("orientation", "portrait");
// parameters.set("rotation", 1);
// camera.setParameters(parameters);
checkCameraFlash(parameters);
// camera.setDisplayOrientation( 0);
setCameraDisplayOrientation(selected_camera, camera);
surface_view.getHolder().setFixedSize(width_video, height_video);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(width_video, height_video);
surface_view.setLayoutParams(lp);
camera.lock();
surface_holder = surface_view.getHolder();
surface_holder.addCallback(this);
surface_holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
setPreviewCamera();
} catch (Exception e) {
Log.v("RecordVideo", "Could not initialize the Camera");
return false;
}
return true;
}
public void setCameraDisplayOrientation(int cameraId, Camera camera) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
int rotation = 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;
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;
}
camera.setDisplayOrientation(result);
}
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
// mtx.postRotate(degree);
mtx.setRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
#Override
public void onPictureTaken(byte[] data, Camera camera) {
String timeStamp = Calendar.getInstance().getTime().toString();
output_file_name = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + File.separator + timeStamp + ".jpeg";
File pictureFile = new File(output_file_name);
if (pictureFile.exists()) {
pictureFile.delete();
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
Bitmap realImage = BitmapFactory.decodeFile(output_file_name);
ExifInterface exif=new ExifInterface(pictureFile.toString());
Log.d("EXIF value", exif.getAttribute(ExifInterface.TAG_ORIENTATION));
if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("6")){
realImage= rotate(realImage, 90);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("8")){
realImage= rotate(realImage, 270);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("3")){
realImage= rotate(realImage, 180);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("0")){
realImage= rotate(realImage, 45);
}
boolean bo = realImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
Log.d("Info", bo + "");
} catch (FileNotFoundException e) {
Log.d("Info", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("TAG", "Error accessing file: " + e.getMessage());
}
}

The problem is when I saved the image I didn't do well.
#Override
public void onPictureTaken(byte[] data, Camera camera) {
String timeStamp = new SimpleDateFormat( "yyyyMMdd_HHmmss").format( new Date( ));
output_file_name = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + File.separator + timeStamp + ".jpeg";
File pictureFile = new File(output_file_name);
if (pictureFile.exists()) {
pictureFile.delete();
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
Bitmap realImage = BitmapFactory.decodeByteArray(data, 0, data.length);
ExifInterface exif=new ExifInterface(pictureFile.toString());
Log.d("EXIF value", exif.getAttribute(ExifInterface.TAG_ORIENTATION));
if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("6")){
realImage= rotate(realImage, 90);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("8")){
realImage= rotate(realImage, 270);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("3")){
realImage= rotate(realImage, 180);
} else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("0")){
realImage= rotate(realImage, 90);
}
boolean bo = realImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
((ImageView) findViewById(R.id.imageview)).setImageBitmap(realImage);
Log.d("Info", bo + "");
} catch (FileNotFoundException e) {
Log.d("Info", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("TAG", "Error accessing file: " + e.getMessage());
}
}
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
// mtx.postRotate(degree);
mtx.setRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}

The setCameraDisplayOrientation() method lets you change how the preview is displayed without affecting how the image is recorded (source).
In order to change the actual recorded image you need to set the rotation parameter of the Camera. You do it like this:
//STEP #1: Get rotation degrees
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int rotation = mActivity.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 rotate = (info.orientation - degrees + 360) % 360;
//STEP #2: Set the 'rotation' parameter
Camera.Parameters params = mCamera.getParameters();
params.setRotation(rotate);
mCamera.setParameters(params);
Your solution is kind of a workaround since you modify the image AFTER it was already recorded. This solution is cleaner and doesn't require all these 'if' statements before saving the image.

You can use the method below to generate preview correctly when your using front camera.
This code goes into surfaceChanged Method of your camera preview
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
int angleToRotate=CommonMethods.getRoatationAngle(mActivity, Camera.CameraInfo.CAMERA_FACING_FRONT);
mCamera.setDisplayOrientation(angleToRotate);
}
This code can be put into a static class
/**
* Get Rotation Angle
*
* #param mContext
* #param cameraId
* probably front cam
* #return angel to rotate
*/
public static int getRoatationAngle(Activity mContext, int cameraId) {
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
int rotation = mContext.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;
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;
}
You can Rotate image this way.This is used only when image is taken and we are about to save the image
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
mtx.postRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
The Method that will be used for taking picture
#Override
public void onPictureTaken(byte[] data, Camera camera) {
int angleToRotate = getRoatationAngle(MainActivity.this, Camera.CameraInfo.CAMERA_FACING_FRONT);
// Solve image inverting problem
angleToRotate = angleToRotate + 180;
Bitmap orignalImage = BitmapFactory.decodeByteArray(data, 0, data.length);
Bitmap bitmapImage = rotate(orignalImage, angleToRotate);
}
The bitmapImage contains the correct image.

this one should work, ExifInterface doesn't work with all manufactures so use CameraInfo instead, just let camera capture image with it's default rotation and then rotate the result data on PictureCallback
private PictureCallback mPicture = new PictureCallback() {
#Override
public void onPictureTaken(byte[] data, Camera camera) {
File dir = new File(Constant.SDCARD_CACHE_PREFIX);
if (!dir.exists()) {
dir.mkdirs();
}
File pictureFile = new File(Constant.SDCARD_TAKE_PHOTO_CACHE_PREFIX);
try {
Bitmap realImage = BitmapFactory.decodeByteArray(data, 0, data.length);
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(mCurrentCameraId, info);
Bitmap bitmap = rotate(realImage, info.orientation);
FileOutputStream fos = new FileOutputStream(pictureFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
} catch (FileNotFoundException e) {
Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "Error accessing file: " + e.getMessage());
}
resultFileUri = Uri.fromFile(pictureFile);
startEffectFragment();
}
};
public static Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
mtx.postRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}

This is the best method to use (Mentioned Below) when your layout is fixed in portrait mode.
#Override
protected void onResume() {
super.onResume();
if (!openCamera(CameraInfo.CAMERA_FACING_BACK)) {
alertCameraDialog();
}
if (cOrientationEventListener == null) {
cOrientationEventListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL) {
public void onOrientationChanged(int orientation) {
// determine our orientation based on sensor response
int lastOrientation = mOrientation;
if (orientation == ORIENTATION_UNKNOWN) return;
Camera.CameraInfo info =
new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
orientation = (orientation + 45) / 90 * 90;
int rotation = 0;
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
rotation = (info.orientation - orientation + 360) % 360;
} else { // back-facing camera
rotation = (info.orientation + orientation) % 360;
}
Parameters params = camera.getParameters();
params.setRotation(rotation);
camera.setParameters(params);
}
};
}
if (cOrientationEventListener.canDetectOrientation()) {
cOrientationEventListener.enable();
}
}
You will be using OrientEventListener and implement this call back method.
onOrientationChanged is called whenever there is change in orientation thus your camera rotation will be set and Picture will be rotated when you will save it.
private PictureCallback myPictureCallback_JPG = new PictureCallback()
{
#Override
public void onPictureTaken(byte[] arg0, Camera arg1) {
try {
File pictureFile = getOutputMediaFile();
if (pictureFile == null) {
return;
}
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(arg0);
fos.close();
camera.startPreview();
} catch (Exception e) {
e.printStackTrace();
}
}
};
getOutputMediaFile
private static File getOutputMediaFile() {
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"MyCameraApp");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("MyCameraApp", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
Source Here

I don't have the rep to leave a comment, so I have to leave another answer instead, although Nvhausid answer is awesome and deserves the credit. Simple, elegant and it works for both front and back cameras on a Samsung device where Exif and Media Cursor doesn't.
The only thing the answer was missing for me was handling the mirror image from the camera facing the user.
Here is the the code changes for that:
Bitmap bitmap = rotate(realImage, info.orientation, info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT);
And the new rotate method:
public static Bitmap rotate(Bitmap bitmap, int degree, boolean mirror) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
if(mirror)mtx.setScale(1,-1);
mtx.postRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}

I find the powerful answer for you, i just meet the same problem and solve it without saving file.The solution is to register an OrientationEventListener to get the orientation whenever it changes.http://www.androidzeitgeist.com/2013/01/fixing-rotation-camera-picture.html here give the details.My code is as below:
private CameraOrientationListener myOrientationListener;
private int rotation;
protected void onCreate(Bundle savedInstanceState) {
setListeners();
rotation = setCameraDisplayOrientation(CameraActivity.this, Camera.getNumberOfCameras()-1, mCamera);
}
public void setListeners(){
myOrientationListener = new CameraOrientationListener(this);
if(myOrientationListener.canDetectOrientation())
myOrientationListener.enable();
}
public static int setCameraDisplayOrientation(Activity activity, int cameraId, Camera camera) {
CameraInfo info = new CameraInfo();
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;
if (info.facing == 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;
}
camera.setDisplayOrientation(result);
return result;
}
/*
* record the rotation when take photo
*/
public void takePhoto(){
myOrientationListener.rememberOrientation();
rotation += myOrientationListener.getRememberedOrientation();
rotation = rotation % 360;
mCamera.takePicture(null, null, mPicture);
}
class CameraOrientationListener extends OrientationEventListener {
private int currentNormalizedOrientation;
private int rememberedNormalizedOrientation;
public CameraOrientationListener(Context context) {
super(context, SensorManager.SENSOR_DELAY_NORMAL);
}
#Override
public void onOrientationChanged(int orientation) {
// TODO Auto-generated method stub
if (orientation != ORIENTATION_UNKNOWN) {
currentNormalizedOrientation = normalize(orientation);
}
}
private int normalize(int degrees) {
if (degrees > 315 || degrees <= 45) {
return 0;
}
if (degrees > 45 && degrees <= 135) {
return 90;
}
if (degrees > 135 && degrees <= 225) {
return 180;
}
if (degrees > 225 && degrees <= 315) {
return 270;
}
throw new RuntimeException("The physics as we know them are no more. Watch out for anomalies.");
}
public void rememberOrientation() {
rememberedNormalizedOrientation = currentNormalizedOrientation;
}
public int getRememberedOrientation() {
return rememberedNormalizedOrientation;
}
}
hope it helps:)

I used the new camera2 api to get sensor orientation and then rotate it accordingly:
private void detectSensorOrientation()
{
CameraManager manager = (CameraManager) getSystemService(CAMERA_SERVICE);
try
{
for (String cameraId : manager.getCameraIdList())
{
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
// We don't use a front facing camera in this sample.
Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT)
{
continue;
}
cameraOrientaion = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
}
} catch (CameraAccessException e)
{
e.printStackTrace();
}
}
Then with the help of cameraOrientation parameter, I rotated my cameraPhoto:
private void generateRotatedBitmap()
{
if (cameraOrientaion != 0)
{
Matrix matrix = new Matrix();
matrix.postRotate(cameraOrientaion);
rotatedPhoto =
Bitmap.createBitmap(cameraPhoto, 0, 0, cameraPhoto.getWidth(), cameraPhoto.getHeight(),
matrix, true);
cameraPhoto.recycle();
}
}

I have come up with this solution based on some previous ideas and my own research. If you only need the rotated image for display or storage, I think this extension function can be useful:
fun ImageProxy.toBitmap(): Bitmap {
val buffer = planes[0].buffer.apply { rewind() }
val bytes = ByteArray(buffer.capacity())
// Get bitmap
buffer.get(bytes)
val bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
// Fix rotation if needed
val angle = imageInfo.rotationDegrees.toFloat()
val matrix = Matrix().apply { postRotate(angle) }
// Return rotated bitmap
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
}
You can get the ImageProxy by calling takePicture from the android camerax library:
imageCapture.takePicture(cameraExecutor, object : ImageCapture.OnImageCapturedCallback() {
override fun onCaptureSuccess(imageProxy: ImageProxy) {
val bitmap = imageProxy.toBitmap()
imageProxy.close()
}
})

android front and back camera captured picture orientation issue, rotated in a wrong way

I have a camera app in portrait mode which takes pictures from both front and back end cameras.The issue is like the captured images are rotated in a wrong way...
For preview i have used the following code....
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; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
} else {
parameters.set("orientation", "portrait");
}
camera.setParameters(parameters);
But the captured images are rotated in a wrong way.i have also tried to rotate the captured image using matrix.postRotate(bitmap).That too doesn't work in some devices like nexus..I tried EXIF also.But here i have url instead of filepath.That doesn't work as well. can anyone help me ?

You can refer below code.
ExifInterface exif = new ExifInterface(SourceFileName); //Since API Level 5
String exifOrientation = exif.getAttribute(ExifInterface.TAG_ORIENTATION);
And also refer this link https://stackoverflow.com/a/6124375/1441666

You can use this to get orientation from a Uri
String filePath = mImageUri.getPath();
if (filePath != null) {
rotation = -1;
ExifInterface exif = new ExifInterface(filePath); // Since
// API
// Level
// 5
rotation = Integer.parseInt(exif.getAttribute(ExifInterface.TAG_ORIENTATION));
// //Log.v("roation",
// exif.getAttribute(ExifInterface.TAG_ORIENTATION));
}
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "Internal error", Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
And as note rotation '3 = 180, 6 = 90, 8 = 270'

I'm using the following code for this:
ExifInterface exif = new ExifInterface(getUriPath(uri));
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
getUriPath:
public String getUriPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(uri, projection, null, null,
null);
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(projection[0]);
cursor.moveToFirst();
String filePath = cursor.getString(column_index);
cursor.close();
return filePath;
} else
return null;
}

try this code snippet
try {
ExifInterface exif = new ExifInterface(filePath);
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
//Toast.makeText(getApplicationContext(), ""+orientation, 1).show();
Log.v("log", "ort is "+orientation);
} catch (IOException e)
{
e.printStackTrace();
}
and then rotate the matrix as per orientation you get
if (orientation==6)
{
Matrix matrix = new Matrix();
matrix.postRotate(90);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
}
else if (orientation==8)
{
Matrix matrix = new Matrix();
matrix.postRotate(270);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
}
else if (orientation==3)
{
Matrix matrix = new Matrix();
matrix.postRotate(180);
bmp = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true;
}

the selected answer just gives the the possible rotation that may have been saved in EXIF header. in several cases camera doesn't set "ExifInterface.TAG_ORIENTATION" attribute in EXIFHeader so it will be 0(ExifInterface.ORIENTATION_UNDEFINED). and event if it is set it will be true in only one case/orientation when the picture is taken. you have to manually set rotation in camera parameters using setRotation() method. the documentation of setRotation() is very clear and also explains how to calculate rotation with consideration of device rotation and camera sensor orientation(usually landscape).
so check out setRotation() method . thats what you need to change.