Pick image from sd card, resize the image and save it back to sd card

Question

I am working on an application, in which I need to pick an image from sd card and show it in image view. Now I want the user to decrease/increase its width by c

Answer 1

Solution without OutOfMemoryException in Kotlin

fun resizeImage(file: File, scaleTo: Int = 1024) {
    val bmOptions = BitmapFactory.Options()
    bmOptions.inJustDecodeBounds = true
    BitmapFactory.decodeFile(file.absolutePath, bmOptions)
    val photoW = bmOptions.outWidth
    val photoH = bmOptions.outHeight

    // Determine how much to scale down the image
    val scaleFactor = Math.min(photoW / scaleTo, photoH / scaleTo)

    bmOptions.inJustDecodeBounds = false
    bmOptions.inSampleSize = scaleFactor

    val resized = BitmapFactory.decodeFile(file.absolutePath, bmOptions) ?: return
    file.outputStream().use {
        resized.compress(Bitmap.CompressFormat.JPEG, 75, it)
        resized.recycle()
    }
}