lateinit var bitmap : Bitmap

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        GlideApp.with(this)
                .asBitmap()
                .load("https://i.stack.imgur.com/Xlsnf.jpg")
                .diskCacheStrategy(DiskCacheStrategy.NONE)
                .skipMemoryCache(true)
                .placeholder(R.drawable.ic_downloading)
                .error(R.drawable.ic_error)
                .into(object: BitmapImageViewTarget(ivImage) {
                    override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {
                        super.onResourceReady(resource, transition)
                        bitmap = resource
                        ivImage.setImageBitmap(resource)
                    }
                })

        btSave.setOnClickListener {
            val file = File(Environment.getExternalStorageDirectory(), "zihadtest.txt")
            file.writeText("Test mantap jiwa broh")
            saveBitmap()
        }
    }

    fun saveBitmap() {
        val saveBmp = Bitmap.createBitmap(bitmap, 0, 0, 500, 500)
        val canvas = Canvas(saveBmp)
        val paint = Paint()
        paint.color = Color.parseColor("#AAF")
        canvas.drawRect(0F, 400F, 500F, 500F, paint)
        paint.color = Color.parseColor("#FFF")
        paint.textSize = 50F
        canvas.drawText("ZIHAD RIZKY EDWIN FIKRI", 30F, 420F, paint)

        val bos = ByteArrayOutputStream()
        saveBmp.compress(Bitmap.CompressFormat.PNG, 100, bos)
        val fos = FileOutputStream(File(Environment.getExternalStorageDirectory(), "zihadtest2.png"))
        fos.write(bos.toByteArray())
        fos.flush()
        fos.close()
    }