从适配器接收数据到DetailsActivity？

问题描述

我想知道如何从适配器（recyclerview）到DetailsActivity接收数据。我尝试了很多次，但是来自recyclerview的图像未显示在DetailsActivity中。 这是我的代码。

ImageAdapter

class ImageAdapter (private var items:List<Item>,private val context:Context):
    RecyclerView.Adapter<ImageAdapter.ViewHolder>() {

override fun onCreateViewHolder(parent: ViewGroup,viewType: Int):ViewHolder {
   return ViewHolder(
       LayoutInflater.from(context).inflate(R.layout.item,parent,false)
   )
}

override fun getItemCount(): Int {
    return items.size
}

override fun onBindViewHolder(holder: ImageAdapter.ViewHolder,position: Int) {
    val item = items[position]
    Picasso.get().load(item.imageUrl).into(holder.imageView)

    holder.imageView.setonClickListener {

        val intent = Intent(context,DetailsActivity::class.java)
        intent.putExtra("iImages",item.imageUrl)
        context.startActivity(intent)

    }
}

class ViewHolder(view:View):RecyclerView.ViewHolder(view) {
    val imageView : ImageView = view.findViewById(R.id.imageView)

}

}

DetailsActivity

class DetailsActivity : AppCompatActivity() {

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


    val aimageView = intent.getIntExtra("iImages",0)
    details_image.setimageResource(aimageView)
}

}

RecyclerActivity

class RecyclerActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_recycler)

    val storage = FirebaseStorage.getInstance()
    val storageRef = storage.reference.child("wallpapers")
    val imageList : ArrayList<Item> = ArrayList()
    //progressBar.visibility = View.VISIBLE

    val listAllTask : Task<ListResult> = storageRef.listAll()
    listAllTask.addOnCompleteListener { result ->
        val items: List<StorageReference> = result.result!!.items

        //add cycle for add image url to list
        items.forEachIndexed { index,item ->
            item.downloadUrl.addOnSuccessListener {
                Log.d("item","$it")
                imageList.add(Item(it.toString()))
            }.addOnCompleteListener {
                recyclerview.adapter = ImageAdapter(imageList,this)
                recyclerview.layoutManager = linearlayoutmanager(this,linearlayoutmanager.HORIZONTAL,false)
                //progressBar.visibility = View.GONE
            }
        }
    }

}

}

项目 数据类Item（ var imageUrl：字符串 ）

解决方法

问题是这一行：

details_image.setImageResource(aImageView)

您正在设置资源int，但是您传递的内容似乎是一个url，因此请使用该视图的Picasso加载“ iImages”值

编辑：替换为：

val aImageView = intent.getIntExtra("iImages",0)
details_image.setImageResource(aImageView)

与此

val retrievedImageUrl = intent.getIntExtra("iImages",0)
Picasso.get().load(retrievedImageUrl).into(details_image)

,

答案

val imageView : ImageView = findViewById(R.id.details_image)
    Glide.with(this).load(intent.getStringExtra("iImages")).into(imageView)