Android 網(wǎng)絡(luò)請(qǐng)求問(wèn)題

使用rxjava吧
線(xiàn)程操作比較方便

package com.github.rxjavatest

import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.support.v7.widget.GridLayoutManager
import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import com.bumptech.glide.Glide
import io.reactivex.Observable
import io.reactivex.android.schedulers.AndroidSchedulers
import io.reactivex.functions.BiFunction

class MainActivity : AppCompatActivity() {

    lateinit var recyclerView: RecyclerView

    val list = arrayListOf<String>()
    val adapter = ImageAdapter(list)

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

        recyclerView = findViewById(R.id.recyclerView)
        recyclerView.layoutManager = GridLayoutManager(this, 3)
        recyclerView.adapter = adapter

        initImage()
    }

    private fun initImage() {
        val imageGetter = ImageGetter("http://588ku.com/beijing/0-0-pxnum-4-8-0-0-0-1/")
        val imgOb = imageGetter.getImageObserable()

        val imageGetter2 = ImageGetter("http://588ku.com/beijing/0-0-pxnum-4-8-0-0-0-2/")
        val imgOb2 = imageGetter2.getImageObserable()

        Observable.zip(imgOb, imgOb2, BiFunction<List<String>, List<String>, List<String>> { t1, t2 ->
            val list = arrayListOf<String>()
            list.addAll(t1)
            list.addAll(t2)
            list
        }).observeOn(AndroidSchedulers.mainThread())
                .subscribe {
                    list.addAll(it)
                    adapter.notifyDataSetChanged()
                }
    }
}

class ImageAdapter(val list: List<String>) : RecyclerView.Adapter<VH>() {

    override fun onBindViewHolder(holder: VH?, position: Int) {

        holder?.apply {
            val src = list[position]
            Glide
                    .with(itemView)
                    .load(src)
                    .into(img)
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): VH {
        val view = LayoutInflater.from(parent?.context)?.inflate(R.layout.item_img, parent, false)
        return VH(view)
    }

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

}

class VH(itemView: View?) : RecyclerView.ViewHolder(itemView) {

    val img: ImageView by lazy { itemView!!.findViewById<ImageView>(R.id.iv_image) }

}

package com.github.rxjavatest

import android.annotation.SuppressLint
import android.util.Log
import io.reactivex.Observable
import io.reactivex.android.schedulers.AndroidSchedulers
import io.reactivex.schedulers.Schedulers
import org.jsoup.Jsoup
import org.jsoup.nodes.Document
import java.util.concurrent.Executors


/**
 * Created by cai on 2018/2/12.
 */
class ImageGetter(var url: String) {
    
    fun getImageObserable(): Observable<ArrayList<String>> {
        return Observable
                .create<Document> {
                    val doc = Jsoup.connect(url)
                            .get()
                    it.onNext(doc)
                    it.onComplete()
                }
                .subscribeOn(Schedulers.io())
                .map {
                    it.select("div a img")
                }
                .map {
                    val list = arrayListOf<String>()
                    it.forEach {
                        val image = it.attr("data-original")
                        list.add(image)
                    }
                    list
                }
                .observeOn(AndroidSchedulers.mainThread())
    }

    @SuppressLint("SetJavaScriptEnabled")
    companion object {
    }

}

val Any.TAG
    get() = this.javaClass.simpleName

fun Any.logger(msg: Any?) {
    Log.i(TAG, msg.toString())
}

簡(jiǎn)單寫(xiě)了個(gè)demo
項(xiàng)目地址

這里用JSoup爬數(shù)據(jù)
然后Rxjava返回?cái)?shù)據(jù)流處理結(jié)果的img src的集合的Observable

在實(shí)際Activity中同時(shí)獲得兩個(gè)Observable,使用zip操作符組合,然后在主線(xiàn)程中將圖片添加到list
刷新adapter

使用Glide加載圖片

其實(shí)我的問(wèn)題應(yīng)該是如何在多線(xiàn)程里返回?cái)?shù)據(jù)

把兩個(gè)類(lèi)合到一起，使用一個(gè)model就好了吧，這樣你可以請(qǐng)求到一個(gè)網(wǎng)站的數(shù)據(jù)add一次，然后notify一下