OnActivityResult Kotlin

Question

我目前正在使用防火墙存储允许用户上传图像。我复制了我以前正在工作的java代码，并试图将它转换为Kotlin，但我有一个不匹配的问题。错误信息是：

需要类型不匹配: Uri找到: Uri?

这是我的密码。

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        super.onActivityResult(requestCode, resultCode, data)
        if (resultCode == Activity.RESULT_OK && requestCode == 1046) {
            try {
                val imageUri : Uri? = data?.data
                val imageStream: InputStream? = this.contentResolver.openInputStream(imageUri) //this is the line that errors imageUri has a mismatch error
                val selectedImage = BitmapFactory.decodeStream(imageStream)
                CloudStorage().upload(imageUri,
                    { s ->
                        uploadedImageURL = s
                    }) { e ->
                    Toast.makeText(this@CreatePostActivity, e.message, Toast.LENGTH_SHORT).show()
                    e.printStackTrace()
                }

            } catch (e: FileNotFoundException) {
                e.printStackTrace()
                Toast.makeText(this, "file not found", Toast.LENGTH_SHORT).show()
            }
        }
    }

谢谢!

Answer 1

imageUri不能为空，因为openInputStream不接受可空值。如果该值不可为空，则只能执行代码来修复它，例如：

data?.data?.let { imageUri ->
        try {
            val imageStream: InputStream? = this.contentResolver.openInputStream(imageUri)
            val selectedImage = BitmapFactory.decodeStream(imageStream)
            CloudStorage().upload(imageUri,
                { s ->
                    uploadedImageURL = s
                }) { e ->
                Toast.makeText(this@CreatePostActivity, e.message, Toast.LENGTH_SHORT).show()
                e.printStackTrace()
            }

        } catch (e: FileNotFoundException) {
            e.printStackTrace()
            Toast.makeText(this, "file not found", Toast.LENGTH_SHORT).show()
        }
} ?: notifyUserImageUriIsNull()

请注意，您要调用super.onActivityResult()两次。

Answer 2

"Android“给出了答案。

​