How To Convert An Image Into Base64 And Also Compress It Using Kotlin In Androidx?

I am creating an offline SMS app. I want to know how to convert image, chosen by the user, into string base64 and also compressed it. I have searched a lot but not much material I

Solution 1:

If condition because it needs build version 26. Below version it won't work

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
    valbm= BitmapFactory.decodeFile("/path/to/image.jpg")
    valstream= ByteArrayOutputStream()
    bm.compress(CompressFormat.JPEG, 70, stream)
    valbyteFormat= stream.toByteArray()
    valimgString= Base64.getEncoder().encodeToString(byteFormat)
}

To Retrieve the Path/to/Image :

val uri = data!!.dataval picturePath = getPath(applicationContext, uri) // Write this line under the uri.
Log.d("Picture Path", picturePath)

This is function to get the path of Image.

privatefungetPath(applicationContext: Context, uri: Uri?): String? {
    var result: String? = nullval proj = arrayOf(MediaStore.Images.Media.DATA)
    val cursor = applicationContext.getContentResolver().query(uri, proj, null, null, null)
    if (cursor != null) {
        if (cursor!!.moveToFirst()) {
            val column_index = cursor!!.getColumnIndexOrThrow(proj[0])
            result = cursor!!.getString(column_index)
        }
        cursor!!.close()
    }
    if (result == null) {
        result = "Not found"
    }
    return result
}

Solution 2:

In Kotlin, To convert your Image File to Base64 and then compress it

valbm= BitmapFactory.decodeFile("/path/to/image.jpg")
valbaos= ByteArrayOutputStream()
bm.compress(Bitmap.CompressFormat.JPEG, 100, baos) //bm is the bitmap objectvalb= baos.toByteArray()

valencodedImage= Base64.encodeToString(b, Base64.DEFAULT)

You have to replace your image path in the first line.