Android-福利-使用kotlin获取妹子图集的简单应用

1.添加依赖包：

implementation 'com.alibaba:fastjson:1.2.16'
implementation 'com.github.bumptech.glide:glide:4.11.0'

2.需要申请网络权限：

xml:
<uses-permission android:name="android.permission.INTERNET"/>
activity:
val p = arrayOf(android.Manifest.permission.INTERNET)
requestPermissions(p,0)

3.AndroidManifest.xml文件中需要配置：

android:usesCleartextTraffic="true"，避免版本出现无法读取网络数据的问题

4.strictmode：

init {
        StrictMode.setThreadPolicy(
            StrictMode.ThreadPolicy.Builder()
                .detectDiskReads().detectDiskWrites().detectNetwork()
                .penaltyLog().build()
        )
    }

5.新建信息类，存储妹子信息：

package com.example.myapplication.ui.adapter

class GirlInfo {
    private lateinit var url:String
    private lateinit var author:String
    private lateinit var desc:String
    constructor()
    constructor(url:String,author:String,desc:String) {
        this.author = author
        this.url = url
        this.desc = desc
    }
    fun setUrl(url: String){
        this.url = url
    }
    fun getUrl():String{
        return url
    }
    fun setAuthor(author:String){
        this.author = author
    }
    fun getAuthor():String{
        return author
    }
    fun setDesc(desc:String){
        this.desc = desc
    }
    fun getDesc():String {
        return desc
    }
}

6.adapter:

package com.example.myapplication.ui.adapter

import android.content.Context
import android.text.Layout
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.BaseAdapter
import android.widget.ImageView
import android.widget.TextView
import com.bumptech.glide.Glide
import com.example.myapplication.R

class GirlInfoAdapter(var context: Context?, var list:MutableList<GirlInfo>): BaseAdapter() {
    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
        val holder:GirlHolder
        val layout:View
        if (convertView==null) {
            holder = GirlHolder()
            val girl = list[position]
            layout = LayoutInflater.from(context).inflate(R.layout.girl_info_item,null)
            holder.author = layout.findViewById(R.id.author)
            holder.author?.text = girl.getAuthor()
            holder.desc = layout.findViewById(R.id.girl_desc)
            holder.desc?.text = girl.getDesc()
            holder.girlImage = layout.findViewById(R.id.girl_img)
            Glide.with(holder.girlImage).load(girl.getUrl()).error(R.mipmap.ic_launcher).into(holder.girlImage)
            layout.tag = holder
        } else {
            layout = convertView
            holder = convertView.tag as GirlHolder
        }
        return layout
    }

    override fun getItem(position: Int): Any {
        return list[position]
    }

    override fun getItemId(position: Int): Long {
        return position.toLong()
    }

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

    inner class GirlHolder{
        lateinit var girlImage:ImageView
        var author:TextView? = null
        var desc:TextView? = null
    }
}

7.列表的子item布局：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/girl_img"
        android:src="@mipmap/ic_launcher"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/girl_desc"
        app:layout_constraintTop_toTopOf="@+id/girl_img"
        app:layout_constraintLeft_toRightOf="@+id/girl_img"
        android:textSize="20sp"
        android:layout_marginStart="10dp"
        android:text="@string/app_name"
        android:gravity="center"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/author"
            app:layout_constraintLeft_toRightOf="@+id/girl_img"
            app:layout_constraintTop_toBottomOf="@+id/girl_desc"
            android:layout_marginTop="5dp"
            android:textSize="20sp"
            android:layout_marginStart="10dp"
            android:text="@string/app_name"
            android:gravity="left"/>

</androidx.constraintlayout.widget.ConstraintLayout>

8.获取数据，解析json：

private fun createGirlInfo():MutableList<GirlInfo>{
        var list = mutableListOf<GirlInfo>()
        val json = URL("https://gank.io/api/v2/data/category/Girl/type/Girl/page/1/count/10").readText(
            Charset.defaultCharset())
        val obj = JSON.parse(json) as Map<*, *>
        val dataArray = obj["data"] as JSONArray
        dataArray.forEach{
            val img:String = (it as Map<*,*>)["url"] as String
            val desc:String = (it as Map<*,*>)["desc"] as String
            val author:String = (it as Map<*,*>)["author"] as String
            var girlInfo = GirlInfo(img,author,desc)
            list.add(girlInfo)
        }
        return list
    }

9.adapter绑定：

        listView = root.findViewById(R.id.girl_list)
        val adapter:GirlInfoAdapter = GirlInfoAdapter(context,createGirlInfo())
        listView.adapter = adapter

10.效果预览：

捕获.PNG