android 适配器内的改造调用

Question

我正在适配器内部执行改造调用。我已经成功实施并且它也给了我想要的输出但是 在适配器下执行此操作是一个好习惯吗？？？？ ?

我的应用是 --> 产品销售应用 --> 在我的购物车中 --> 显示用户想要购买的产品列表 --> 为此需要一个适配器 --> 那里我正在执行滑动删除功能 --> 对删除 (holder.delete.setonclicklistener {...}) 按钮执行改造调用

my code is-->

        holder.tvDelete.setOnClickListener(View.OnClickListener { view ->
        progressDialog.show()

        val token: String = SharedPrefManager.getInstance(context).user.access_token.toString()
        RetrofitClient.instance.deletecart(token, id.toString())
            .enqueue(object : Callback<DeleteResponse> {
                override fun onFailure(call: Call<DeleteResponse>, t: Throwable) {

                    Log.d("res", "" + t)


                }

                override fun onResponse(
                    call: Call<DeleteResponse>,
                    response: Response<DeleteResponse>
                ) {
                    var res = response
                    progressDialog.dismiss()
                    (context as Activity).finish()

                    if (res.body()?.status == 200) {
                        Toast.makeText(
                            context,
                            res.body()?.message,
                            Toast.LENGTH_LONG
                        ).show()
                        progress()

                        mItemManger.removeShownLayouts(holder.swipelayout)
                        notifyItemChanged(position)
                        notifyItemRemoved(position)
                        dataList?.removeAt(position)
                        notifyItemRangeChanged(position, dataList?.size!!)
                        mItemManger.closeAllItems()


                    } else {
                        try {
                            val jObjError =
                                JSONObject(response.errorBody()!!.string())
                            Toast.makeText(
                                context,
                                jObjError.getString("message") + jObjError.getString("user_msg"),
                                Toast.LENGTH_LONG
                            ).show()
                        } catch (e: Exception) {
                            Toast.makeText(context, e.message, Toast.LENGTH_LONG).show()
                            Log.e("errorrr", e.message)
                        }
                    }
                }
            })

        mItemManger.bindView(holder.itemView, position)

    })

以上代码有效

我也经历过这个 -->

这个 link 我执行了但是在 activity 我不会在 activity

中访问这个代码

    mItemManger.removeShownLayouts(holder.swipelayout)
                        notifyItemChanged(position)
                        notifyItemRemoved(position)
                        dataList?.removeAt(position)
                        notifyItemRangeChanged(position, dataList?.size!!)
                        mItemManger.closeAllItems()

需要对此进行澄清

需要帮助谢谢

编辑：-- 我按照上面的 link 这是我的代码

interface

interface OnItemClick {
fun onItemClicked(position: Int)

 }

activity

class AddToCart:BaseClassActivity(), OnItemClick{
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.add_to_cart)
    getWindow().setExitTransition(null)
    getWindow().setEnterTransition(null)
    var mActionBarToolbar = findViewById<androidx.appcompat.widget.Toolbar>(R.id.toolbartable);
    setSupportActionBar(mActionBarToolbar);
    // add back arrow to toolbar
  setEnabledTitle()

    mActionBarToolbar.setNavigationOnClickListener(View.OnClickListener {
        onBackPressed()
    })
    placeorder.setOnClickListener {
        val intent:Intent=Intent(applicationContext, AddressActivity::class.java)
        startActivity(intent)
    }
   loadCart()
  }

   fun loadCart(){

  val model = ViewModelProvider(this)[CartViewModel::class.java]

  model.CartList?.observe(this, object : Observer<CartResponse> {
      override fun onChanged(t: CartResponse?) {

          generateDataList(t?.data?.toMutableList())
          totalamount.setText(t?.total.toString())
      }
  })
  }

fun generateDataList(dataList: MutableList<DataCart?>?) {
    val recyclerView=findViewById<RecyclerView>(R.id.addtocartrecyleview) as? RecyclerView
    val linear:LinearLayoutManager=
        LinearLayoutManager(applicationContext, LinearLayoutManager.VERTICAL, false)
    recyclerView?.layoutManager=linear
    val adapter = CartAdapter(this@AddToCart, dataList)
    recyclerView?.adapter=adapter
    recyclerView?.addItemDecoration(DividerItemDecorator(resources.getDrawable(R.drawable.divider)))


    adapter.notifyDataSetChanged()
     adapter.setItemClick(this)
    if (dataList?.isEmpty() ?: true) {
        recyclerView?.setVisibility(View.GONE)
        totalamount.setVisibility(View.GONE)
        fl_footer.setVisibility(View.GONE)
        placeorder.setVisibility(View.GONE)
        emptytext.setVisibility(View.VISIBLE)
    } else {
        recyclerView?.setVisibility(View.VISIBLE)
        totalamount.setVisibility(View.VISIBLE)
        fl_footer.setVisibility(View.VISIBLE)
        placeorder.setVisibility(View.VISIBLE)
        emptytext.setVisibility(View.GONE)


    }
  recyclerView?.addOnScrollListener(object :
      RecyclerView.OnScrollListener() {
      override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
          super.onScrollStateChanged(recyclerView, newState)
          Log.e("RecyclerView", "onScrollStateChanged")
      }

      override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
          super.onScrolled(recyclerView, dx, dy)
      }
  })
}
override fun onBackPressed() {
    super.onBackPressed()
    val intent = Intent(this, HomeActivity::class.java)
      startActivity(intent)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
    return when (item.itemId) {
        android.R.id.home -> {
            NavUtils.navigateUpFromSameTask(this)

            true
        }
        else -> super.onOptionsItemSelected(item)
    }
}

override fun onResume() {
    super.onResume()
   loadCart()
}


override fun onItemClicked(position: Int) {

    val token: String = SharedPrefManager.getInstance(applicationContext).user.access_token.toString()
    RetrofitClient.instance.deletecart(token, id.toString())
        .enqueue(object : Callback<DeleteResponse> {
            override fun onFailure(call: Call<DeleteResponse>, t: Throwable) {

                Log.d("res", "" + t)


            }

            override fun onResponse(
                call: Call<DeleteResponse>,
                response: Response<DeleteResponse>
            ) {
                var res = response
                (applicationContext as Activity).finish()

                if (res.body()?.status == 200) {
                    Toast.makeText(
                        applicationContext,
                        res.body()?.message,
                        Toast.LENGTH_LONG
                    ).show()
                    val intent =
                        Intent(applicationContext, AddToCart::class.java)
                    intent.flags =
                        Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_MULTIPLE_TASK
                    applicationContext.startActivity(intent)
                    (applicationContext as Activity?)!!.overridePendingTransition(0, 0)


                } else {
                    try {
                        val jObjError =
                            JSONObject(response.errorBody()!!.string())
                        Toast.makeText(
                            applicationContext,
                            jObjError.getString("message") + jObjError.getString("user_msg"),
                            Toast.LENGTH_LONG
                        ).show()
                    } catch (e: Exception) {
                        Toast.makeText(applicationContext, e.message, Toast.LENGTH_LONG).show()
                        Log.e("errorrr", e.message)
                    }
                }
            }
        })

}
   }

adapter:--

class CartAdapter(private val context: Context, private val dataList: MutableList<DataCart?>?) :
RecyclerSwipeAdapter<CartAdapter.CustomViewHolder>() , AdapterView.OnItemSelectedListener{ //added RecyclerSwipeAdapter and override
private var itemClick: OnItemClick? = null

inner class CustomViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView),
    View.OnClickListener {
    val mView: View
  val swipelayout:SwipeLayout
    val productiamge: ImageView
    val productname: TextView
    val productcategory: TextView
    val productprice: TextView
    val tvDelete:TextView
    val spin:Spinner
    init {
        mView = itemView
    productiamge= mView.findViewById(R.id.imagecart)
       productname= mView.findViewById(R.id.imagenamecart)
        productcategory= mView.findViewById(R.id.imagecategory)

     productprice =mView.findViewById(R.id.price)
        swipelayout=mView.findViewById(R.id.swipe)
        tvDelete=mView.findViewById(R.id.tvDelete)
         spin = mView.findViewById(R.id.spinner) as Spinner
        tvDelete.setClickable(true);
        tvDelete.setOnClickListener(this);

    }

    override fun onClick(v: View?) {
        if (itemClick != null) {
            itemClick!!.onItemClicked(getPosition());
        }
    }


}

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomViewHolder {
    val layoutInflater = LayoutInflater.from(parent.context)
    val view: View = layoutInflater.inflate(R.layout.addtocart_item, parent, false)

    return CustomViewHolder(view)
}

override fun getSwipeLayoutResourceId(position: Int): Int {
    return R.id.swipe;

}

override fun onBindViewHolder(holder: CustomViewHolder, position: Int) {
  val  progressDialog :ProgressDialog= ProgressDialog(context);
    holder.productname.text = dataList?.get(position)?.product?.name ?: null
    holder.productcategory.text = "(" +dataList?.get(position)?.product?.product_category +")"

    holder.productprice.text = dataList?.get(position)?.product?.cost.toString()

    Glide.with(context).load(dataList?.get(position)?.product?.product_images)
        .into(holder.productiamge)

    holder.swipelayout.setShowMode(SwipeLayout.ShowMode.PullOut)
    Log.e("checkidd", dataList?.get(position)?.product?.id.toString())
    // Drag From Right

    // Drag From Right
    holder.swipelayout.addDrag(
        SwipeLayout.DragEdge.Right,
        holder.swipelayout.findViewById(R.id.bottom_wrapper)
    )
     val id =dataList?.get(position)?.product?.id

    holder.tvDelete.setOnClickListener(View.OnClickListener { view ->
        mItemManger.removeShownLayouts(holder.swipelayout)
        notifyItemChanged(position)
        notifyItemRemoved(position)
        dataList?.removeAt(position)
        notifyItemRangeChanged(position, dataList?.size!!)
        mItemManger.closeAllItems()
    })
    mItemManger.bindView(holder.itemView, position)


}
    override fun getItemCount() = dataList?.size ?: 0

override fun onNothingSelected(p0: AdapterView<*>?) {
    TODO("Not yet implemented")
}

override fun onItemSelected(p0: AdapterView<*>?, p1: View?, p2: Int, p3: Long) {

}
fun getItemClick(): OnItemClick? {
    return itemClick
}

fun setItemClick(itemClick: OnItemClick?) {
    this.itemClick = itemClick
}

}

但我没有得到想要的输出帮助我

Answer 1

这不是在适配器中进行 API 调用的好习惯。您可以创建从适配器到 activity 的回调，并且应该在 activity 本身中调用此 API 代码。如果您需要来自适配器的一些引用，那么您可以在适配器中创建方法并通过创建适配器的对象在 activity 中调用这些方法。

Answer 2

在用户 EpicPandaForce 的帮助下，我得到了问题的答案

接口::----

interface OnItemClick {
fun DeleteItem(position: Int, id:Int)
}

适配器::----

    private var itemClick: OnItemClick? = null
     .
    .
     .
      holder.tvDelete.setOnClickListener(View.OnClickListener { view ->
        mItemManger.removeShownLayouts(holder.swipelayout)
        notifyItemChanged(position)
        notifyItemRemoved(position)
        dataList?.removeAt(position)
        itemClick?.DeleteItem(position,id!!.toInt())

        notifyItemRangeChanged(position, dataList?.size!!)
        mItemManger.closeAllItems()
    })
    mItemManger.bindView(holder.itemView, position)


    }
    .
    .
     .
     
fun setItemClick(itemClick: OnItemClick?) {
    this.itemClick = itemClick
}

Activity::----

class AddToCart:BaseClassActivity(), OnItemClick{
 .
 .
  .
   onCreate(){
            adapter.setItemClick(this);
       .
       .
       .
       }
         override fun DeleteItem(position: Int, id:Int) {
    progressDialog?.show()
        viewModel.product_id.value =id.toString()
    viewModel.loaddelete()
    viewModel.Results.observe(this) { result ->
        when (result) {
            CartViewModel.Result.Missing -> {
                Toast.makeText(
                    applicationContext, "product is missing", Toast.LENGTH_LONG
                ).show()

            }


            CartViewModel.Result.Success -> {
                finish()
                val intent =
                    Intent(applicationContext, AddToCart::class.java)
                intent.flags =
                    Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_MULTIPLE_TASK
                startActivity(intent)
                overridePendingTransition(0, 0)                }
            else ->
            {
                Toast.makeText(applicationContext,"hello",Toast.LENGTH_LONG).show()
            }
        }
    }



}

视图模型::--------

fun loaddelete(){
    val id = product_id.value!!.toString().trim()

    val token: String = SharedPrefManager.getInstance(getApplication()).user.access_token.toString()
    RetrofitClient.instance.deletecart(token, id)
        .enqueue(object : Callback<DeleteResponse> {
            override fun onFailure(call: Call<DeleteResponse>, t: Throwable) {
                loginResultEmitter.emit(CartViewModel.Result.NetworkFailure)

                Log.d("res", "" + t)


            }

            override fun onResponse(
                call: Call<DeleteResponse>,
                response: Response<DeleteResponse>
            ) {
                var res = response


                if (res.body()?.status == 200) {
                    Toast.makeText(
                        getApplication(),
                        res.body()?.message,
                        Toast.LENGTH_LONG


                    ).show()


                    loginResultEmitter.emit(CartViewModel.Result.Success)



                } else {
                    try {
                        val jObjError =
                            JSONObject(response.errorBody()!!.string())
                        Toast.makeText(
                            getApplication(),
                            jObjError.getString("message") + jObjError.getString("user_msg"),
                            Toast.LENGTH_LONG
                        ).show()
                    } catch (e: Exception) {
                        Toast.makeText(getApplication(), e.message, Toast.LENGTH_LONG).show()
                        Log.e("errorrr", e.message)
                    }
                }
            }
        })




}

android 适配器内的改造调用

Retrofit call inside an adapter in android

android

android-adapter

kotlin

android-recyclerview

retrofit2

编辑：-- 我按照上面的 link 这是我的代码