如何使用毕加索在 RecyclerView 中设置图像

Question

我正在使用 Picasso 获取图像并在 recyclerview 中显示，但我不知道如何在 recyclerview 中获取和设置图像。我在堆栈上准备了很多问题，但我不明白。

这里是 mainActivity

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


        var item = ArrayList<dumy_item_list>()
      var progressBar2 = findViewById<ProgressBar>(R.id.progressBar2)
        var away_recycler = findViewById<RecyclerView>(R.id.away_recycler)
        away_recycler.layoutManager = GridLayoutManager(applicationContext, 1)
        var url = "https://apps.faizeqamar.website/charity/api/organizations"
        var rq: RequestQueue = Volley.newRequestQueue(this)
        var sr = StringRequest(
            Request.Method.GET, url, Response.Listener { response ->
                var jsonResponse = JSONObject(response)
                var jsonArray: JSONArray = jsonResponse.getJSONArray("data")
                for (i in 0..jsonArray.length() - 1) {
                    var jsonObject: JSONObject = jsonArray.getJSONObject(i)
                    var name = jsonObject.getString("ngo_name")
                    var org_id = jsonObject.getString("ngo_id")
                    var ngo_phone = jsonObject.getString("ngo_phone")
                    AppPrefrence.ngoId = org_id
                   item.add(dumy_item_list(name,ngo_phone))
                }
                var adaptor = food_adapter(item, applicationContext)
                away_recycler.adapter = adaptor
               progressBar2?.visibility = View.INVISIBLE
            },
            Response.ErrorListener { error ->
                var message: String? = null
                if (error is NetworkError) {
                    message = "Cannot connect to Internet...Please check your connection!"
                } else if (error is ServerError) {
                    message =
                        "The server could not be found. Please try again after some time!!"
                } else if (error is AuthFailureError) {
                    message = "Cannot connect to Internet...Please check your connection!"
                } else if (error is ParseError) {
                    message = "Parsing error! Please try again after some time!!"
                } else if (error is NoConnectionError) {
                    message = "Cannot connect to Internet...Please check your connection!"
                } else if (error is TimeoutError) {
                    message = "Connection TimeOut! Please check your internet connection."
                }
                Toast.makeText(applicationContext,message, Toast.LENGTH_LONG).show()
            })
        rq.add(sr)
    }

这里是适配器类

class food_adapter(data: ArrayList<dumy_item_list>, var context: Context) :
    RecyclerView.Adapter<food_adapter.viewHolder>() {
    var data: List<dumy_item_list>
    init {
        this.data = data
        this.context = context;
    }
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): food_adapter.viewHolder {

        var layout = LayoutInflater.from(context).inflate(R.layout.dumy_item, parent, false)
        return viewHolder(layout)
    }
    override fun onBindViewHolder(viewHolder: viewHolder, position: Int) {

        viewHolder.tv_dummy_name_donnor.setText(data[position].tv_dummy_name_donnor)
        viewHolder.tv_dummy_phone_donnor.setText(data[position].tv_dummy_phone_donnor)
        viewHolder.tv_counter.setText((position+1).toString())



        viewHolder.card.setOnClickListener {
            var intent = Intent(context, Food_Activity::class.java)
        //   intent.putExtra("name",data[position].tv_dummy_name_donnor)
        //   intent.putExtra("about",data[position].about)
            intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
            startActivity(context, intent, null)
        }
    }
    override fun getItemCount(): Int {
        return data.size
    }
    class viewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        internal var tv_dummy_name_donnor: TextView
        internal var tv_dummy_phone_donnor: TextView
        internal var img_ngo: ImageView
        internal var tv_counter: TextView
        internal var card: CardView
        init {
            tv_dummy_name_donnor = itemView.findViewById(R.id.tv_dummy_name_donnor)
            tv_dummy_phone_donnor = itemView.findViewById(R.id.tv_dummy_phone_donnor)
            img_ngo = itemView.findViewById(R.id.img_ngo)
            tv_counter = itemView.findViewById(R.id.tv_counter)
            card = itemView.findViewById(R.id.card)
        }
    }

Answer 1

添加依赖 implementation 'com.squareup.picasso:picasso:2.71828' 同步项目 然后

在onBindViewHolder中

Picasso.get(data[position].image).load(img_ngo).error(R.mipmap.ic_launcher).into(viewHolder.img_ngo)

将R.mipmam.ic_launcher 替换为默认图像，如果目标图像无法及时加载，则该图像可见。

data[position].image 中的图像是您在模型中初始化的变量

现在告诉我结果

编辑 - Picasso.get().load(data[position].image).error(R.mipmap.ic_launcher).into(viewHolder.img_ngo) - Thung Thang