traendy

private fun takeAPicture() {
        Intent(MediaStore.ACTION_IMAGE_CAPTURE).also { takePictureIntent ->
            takePictureIntent.resolveActivity(packageManager)?.also {
                val photoFile: File? = try {
                    createImageFile(FILENAME)
                } catch (ex: IOException) {
                    Log.e(TAG, ex.message)
                    null
                }
                photoFile?.also {

traendy

private fun createImageFile(filename: String): File? {
        val storageDir: File? = getExternalFilesDir(Environment.DIRECTORY_PICTURES)
        return File.createTempFile(
            filename, /* name */
            null, /* suffix can be null */
            storageDir /* directory */
        ).apply {
            // Save a file: path for use with ACTION_VIEW intents
            currentPhotoPath = absolutePath
        }

traendy

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        val imageBitmap: Bitmap?
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == Activity.RESULT_OK) {
            imageBitmap = handleSamplingAndRotationBitmap(this, Uri.fromFile(File(currentPhotoPath)))
            imageBitmap?.let {
                imageView.setImageBitmap(it)
            }
        }
    }

traendy

fun handleSamplingAndRotationBitmap(context: Context, selectedImage: Uri): Bitmap? {
    val imageStream = context.contentResolver.openInputStream(selectedImage)
    val image = BitmapFactory.decodeStream(imageStream, null, BitmapFactory.Options())
    imageStream?.close()
    return if(image != null){
        rotateImageIfRequired(image, selectedImage)
    } else {
        image
    }
}

traendy

private fun rotateImageIfRequired(img: Bitmap, selectedImage: Uri): Bitmap? {
    selectedImage.path?.let {
        val orientation = ExifInterface(it).getAttributeInt(
            ExifInterface.TAG_ORIENTATION,
            ExifInterface.ORIENTATION_NORMAL)
        return when (orientation) {
            ExifInterface.ORIENTATION_ROTATE_90 -> rotateImage(img, 90f)
            ExifInterface.ORIENTATION_ROTATE_180 -> rotateImage(img, 180f)
            ExifInterface.ORIENTATION_ROTATE_270 -> rotateImage(img, 270f)
            ExifInterface.ORIENTATION_FLIP_HORIZONTAL -> flip(img, true)

traendy

private fun rotateImage(img: Bitmap, degree: Float): Bitmap {
    val matrix = Matrix()
    matrix.postRotate(degree)
    return Bitmap.createBitmap(img, 0, 0, img.width, img.height, matrix, true)
}

private fun flip(bitmap: Bitmap, horizontal: Boolean): Bitmap {
    val matrix = Matrix()
    matrix.preScale((if (horizontal) -1f else 1f), (if (!horizontal) -1f else 1f))
    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)