ImagePicker.kt

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        //Check and request permission to write external storage
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
                == PackageManager.PERMISSION_DENIED) {
            ActivityCompat.requestPermissions(this, Array<String>(1) { Manifest.permission.WRITE_EXTERNAL_STORAGE }, 12345)
            //If there is no permission, disable the onClickListener on the FAB 
            fab_take_photo.setOnClickListener(null)
        } else {
            fab_take_photo.setOnClickListener(this)
        }
    }
     
    override fun onClick(v: View?) {
        //onClick attribute for the FloatingActionButton
        startIntentForPicker()
    }

    private fun startIntentForPicker() {
        //Start Image Picker from the gallery
        EasyImage.openGallery(this, 0)
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        if (requestCode == 12345) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED)
            //The library requires write access to the External Storage, 
            //so ensure that the permission is granted
                fab_take_photo.setOnClickListener(this)
        }
    }


    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
                == PackageManager.PERMISSION_GRANTED) {
            EasyImage.handleActivityResult(requestCode, resultCode, data, this, object : DefaultCallback() {

                override fun onImagePicked(imageFile: File?, source: EasyImage.ImageSource?, type: Int) {
                    // The image was fetched successfully
                    val bitmap = BitmapFactory.decodeFile(imageFile?.path)
                    //Make API call with the bitmap
                    getLandscapeFromCloud(bitmap)
                }

                override fun onImagePickerError(e: Exception?, source: EasyImage.ImageSource?, type: Int) {
                    //Some error handling since no image was picked
                }

            })
        }
    }