kotlin1

2019.02.12 11:33

链接：
kotlin语言中文
https://www.kotlincn.net/
kotlin教程
https://www.runoob.com/kotlin/kotlin-tutorial.html
使用kotlin高效地开发android
https://www.jianshu.com/p/5f77209abb9b
Android快速转战Kotlin教程
https://blog.csdn.net/github_33304260/article/details/80343514
对比java kotlin
https://github.com/MindorksOpenSource/from-java-to-kotlin
配置环境
https://www.jianshu.com/p/8aa7b407d24f
技术博客
https://antonioleiva.com/
https://legacy.gitbook.com/book/wangjiegulu/kotlin-for-android-developers-zh/details
对应代码
https://github.com/antoniolg/Kotlin-for-Android-Developers

1、布局：



    



2、创建adapter：
package cn.nubia.weatherkotlin.adapter

import android.support.v7.widget.AppCompatAutoCompleteTextView
import android.support.v7.widget.RecyclerView
import android.view.ViewGroup
import android.view.ViewParent
import android.widget.TextView

class ForecastListAdapter(val items: List) : RecyclerView.Adapter() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder(TextView(parent.context))
    }

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

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.textView.text = items.get(position)
    }

    class ViewHolder(val textView: TextView) : RecyclerView.ViewHolder(textView)
}

3、MainActivity.kt

     val forecastList = findViewById(R.id.forecast_list) as RecyclerView
     forecastList.layoutManager = LinearLayoutManager(this)
     forecastList.adapter = ForecastListAdapter(items)

4、toast函数

    fun Context.toast(message: CharSequence, duration: Int = Toast.LENGTH_SHORT) {
        Toast.makeText(this, message, duration).show()
    }

5、网络请求

public class Request(val url: String) {

    public fun run() {
        val forecastJsonStr = URL(url).readText()
        Log.e(javaClass.simpleName, forecastJsonStr)
    }
}

6、权限

    

7、数据类

data class Forecast(val date: Date, val temperature: Float, val details: String)

8、