Android Studio，Kotlin：上传图片并显示

它打开画廊，但是当我选择一张照片时，图像不会改变。 这是我的代码告诉我我哪里错了

@SuppressLint("NewApi", "ResourceType") override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) if (requestCode == SELECTED_PICTURE){ if (resultCode == Activity.RESULT_OK) { val uri : Uri = data!!.data val projection = arrayOf(MediaStore.Images.Media.DATA) val cursor : Cursor = contentResolver.query( uri, projection,null,null) cursor.moveToFirst() val columnIndex : Int = cursor.getColumnIndex(projection[0]) val filePath : String = cursor.getString(columnIndex) cursor.close() val yourSelected_image : Bitmap = BitmapFactory.decodeFile(filePath) val d : Drawable = BitmapDrawable(yourSelected_image) }