Android kotlin开发项目MVP架构搭建

1、引入需要的网络库

    implementation 'com.squareup.retrofit2:retrofit:2.7.1'
    implementation 'com.squareup.retrofit2:converter-gson:2.7.1'
    implementation 'com.jakewharton.retrofit:retrofit2-kotlin-coroutines-adapter:0.9.2'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.4.1'
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.5.0'
    implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
    implementation 'io.reactivex.rxjava2:rxjava:2.2.3'

2、编写RetrofitUtils类，可以切换多个请求地址具体根据自己的项目需求

import com.google.gson.Gson
import okhttp3.OkHttpClient
import okhttp3.Protocol
import retrofit2.Retrofit
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory
import retrofit2.converter.gson.GsonConverterFactory
import java.util.*
import java.util.concurrent.TimeUnit

class RetrofitUtils{
    companion object{
        private var url=""
         fun   configRetrofit(type: Int,service: Class): T{
            if(type==1){
                url="https://"//网络地址1
            }else if(type==2){
                url="https://"//网络地址2
            }
            val client = OkHttpClient().newBuilder()
                .connectTimeout(10,TimeUnit.SECONDS)
                .readTimeout(10,TimeUnit.SECONDS)
                .writeTimeout(10,TimeUnit.SECONDS)
                .addNetworkInterceptor(LoggingInterceptor())
                .protocols(Collections.singletonList(Protocol.HTTP_1_1))
                .build()
            val retrofit = Retrofit.Builder().baseUrl(url)
                .addConverterFactory(GsonConverterFactory.create(Gson()))
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .client(client)
                .build()
            return retrofit.create(service)
        }
    }
}

3、编写网络Log过滤器

package com.neusoft.myapplication.net

import android.util.Log
import android.util.Log.i
import okhttp3.Interceptor
import okhttp3.Response

class LoggingInterceptor: Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        val request = chain.request()
        val t1 = System.nanoTime()
        Log.i("LogginInterceptor","发送请求"+request.url()+chain.connection()+request.headers())
        //发送请求
        val response = chain.proceed(request)
        //收到响应时间
        val t2 =System.nanoTime()
        //这里不能直接使用response.body().string()的方式输出日志
        //因为response.body().string()之后，response中的流会被关闭，程序会报错，我们需要创建出
        //一个新的response给应用层处理
        val responseBody = response.peekBody(1024 * 1024)
        info("LogginInterceptor","接收响应"+response.request().url()+responseBody.string()+(t2-t1) / 1e6)
        return response
    }
   private fun  info(tag: String,bodyMsg: String){
        if(bodyMsg.length>4000){
            for(index in 0..bodyMsg.length){
                //当前截取的长度，总长度则继续截取最大的长度来打印
                if(index+4000

4、编写网络回调接口

public interface CallBack{
    fun onSuccess(data: T)
    fun onFail(code: Int, data: String?)
}

5、编写BaseObeserver统一处理数据

import io.reactivex.Observer
import io.reactivex.disposables.Disposable


open class BaseObserver(callBack:CallBack) : Observer{
    var callBack : CallBack?=null//初始化
    init {
        this.callBack = callBack;
    }
    override fun onComplete() {
    }

    override fun onSubscribe(d: Disposable) {
    }

    override fun onNext(t: T) {
        if(t!=null){
            callBack!!.onSuccess(t)//判断callBack不为空
        }else{
            callBack!!.onFail(999,"获取数据失败")//判断callBack不为空
        }
    }

    override fun onError(e: Throwable) {
        callBack!!.onFail(1000,e.message)
    }


}

未完待续...