我正在 Kotlin 中为朋友的水晶标本创建一个库存应用程序。预期的逻辑是:
但是,我不确定如何将图像存储在 Firebase 实时数据库中。我已经在 Java 中看到了这个过程的例子,它需要在 onActivityResult 中,在存储之前将 data.data 转换为位图,但我不完全理解来转换这个。我希望有人能解释将图像来自相机和不是来自相机的图像存储到firebase中的方法和原因。
我的代码在下面,我添加了一些问题。
RockEnry.kt
package com.inven.rock_stock
import android.content.Intent
import android.graphics.Picture
import com.google.firebase.database.FirebaseDatabase
import com.google.firebase.database.core.Context
class RockEntry {
var name = ""
var purchDate = ""
var local = ""
var mine = ""
var weight = ""
var paid = ""
var asking = ""
var description = ""
var dimensions = ""
constructor(name:String,purchDate:String,local:String,mine:String,
weight:String,paid:String,asking:String,description:String,dimensions:String,){
this.name = name
this.purchDate = purchDate
this.local = local
this.mine = mine
this.weight = weight
this.paid = paid
this.asking = asking
this.description = description
this.dimensions = dimensions
如何在构造函数中存储图片?
}
}
主活动
package com.inven.rock_stock
import android.app.Activity
import android.content.ActivityNotFoundException
import android.content.Intent
import android.os.Bundle
import android.provider.MediaStore
import androidx.appcompat.app.AppCompatActivity
import com.google.firebase.database.FirebaseDatabase
import kotlinx.android.synthetic.main.activity_main.*
var CAMERA_REQUEST_CODE = 0
var database = FirebaseDatabase.getInstance().reference
class MainActivity : AppCompatActivity() {
private val TAG = "MyActivity"
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
button.setOnClickListener {
var name = name.text.toString()
var local = locality.text.toString()
var mine = mine.text.toString()
var weight = weight.text.toString()
var dimensions = dimensions.text.toString()
var paid = paid.text.toString()
var asking = asking.text.toString()
var description = description.text.toString()
database.child("Rocks").child(name.toLowerCase()).setValue(
RockEntry(
name,
local,
mine,
weight,
dimensions
paid,
asking,
description
)
)
}
imageBtn.setOnClickListener {
takePicture()
}
}
private fun takePicture() {
CAMERA_REQUEST_CODE = 222
val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
try {
startActivityForResult(takePictureIntent, CAMERA_REQUEST_CODE)
} catch (e: ActivityNotFoundException) {
// display error state to the user
}
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
when (requestCode) {
CAMERA_REQUEST_CODE -> {
if (resultCode == Activity.RESULT_OK && data != null) {
println(“我需要做什么才能将图片放入 firebase?”)
val singularity = data.data
}
}
}
}
}
我想我在以下方面遇到了一些概念问题:
我在 Java here 中找到了一些示例(我可能应该在其中创建此项目),但此时我的转换非常难看。
这是我一直在关注的文档photobasicsDoc,uploadDoc
答案 0 :(得分:0)
我的误解是 FireBaseDatabase 和 FireBaseStorage 是一回事。
最重要的是我使用 firebase 配置了一些存储
Android Studio 中的工具(还添加了适当的依赖项)
我声明了 private var mStorageRef: StorageReference? = null
并将其设置为等于 mStorageRef = FirebaseStorage.getInstance().getReference("ImagesBB")
在我的
在创建。
以下是我从我的 onActivityResult:
val imageBitmap = data.extras?.get("data") as Bitmap
val baos = ByteArrayOutputStream()
imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos)
val datar = baos.toByteArray()
mStorageRef!!.putBytes(datar)
我仍然欢迎对帖子的输入,仍然存在的问题:
谢谢