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安卓Coroutines结合Retrofit发送单个或多个网络请求(串行)

想溜了的蜗牛 2022-02-25 阅读 50


目标

采用Coroutines结合Retrofit,发送单个或多个网络请求(串行),并更新UI.

实现方案

发送单个网络请求方案

  1. 修改app工程的build.gradle文件
  • 在android节点下添加如下信息
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
  • 添加依赖
implementation 'com.squareup.retrofit2:retrofit:2.7.2'
implementation 'com.squareup.retrofit2:converter-gson:2.7.2'

implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.3"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3"
  1. 定义数据类Task.kt
data class Task(val id: Int, var name: String)
  1. 创建网络接口类NetworkService.kt
interface NetworkService {
@GET("cxyzy1/AndroidAsyncTaskDemo/raw/master/data.json")
suspend fun query(): Task
}
  1. 创建网络工具类NetworkUtils.kt
fun getNetworkService(): NetworkService {
val okHttpClient = OkHttpClient.Builder().build()
val retrofit = Retrofit.Builder()
.client(okHttpClient)
.baseUrl("https://gitee.com/")
.addConverterFactory(GsonConverterFactory.create())
.build()

return retrofit.create(NetworkService::class.java)
}
  1. activity调用
private fun queryData() {
val networkService = getNetworkService()
GlobalScope.launch(Dispatchers.Main) {
val result = withContext(Dispatchers.IO) { networkService.query() }
contentTv.text = result.toString()
}
}

发送两个网络请求方案


  1. 修改app工程的build.gradle文件,同上
  2. 定义数据类Task.kt,同上
  3. 创建网络接口类NetworkService.kt

interface NetworkService {
@GET("cxyzy1/AndroidAsyncTaskDemo/raw/master/data.json")
suspend fun query(): Task

@GET("cxyzy1/AndroidAsyncTaskDemo/raw/master/data2.json")
suspend fun query2(): Task
}

  1. 创建网络工具类NetworkUtils.kt,同上
  2. activity调用

private fun queryData() {
val networkService = getNetworkService()
GlobalScope.launch(Dispatchers.Main) {
val result = withContext(Dispatchers.IO) { networkService.query() }
contentTv.text = result.name

val result2 = withContext(Dispatchers.IO) { networkService.query2() }
contentTv2.text = result2.name
}
}

代码说明:

直接顺序调用query和query2两个接口.

完整源代码

​​https://gitee.com/cxyzy1/AndroidAsyncTaskDemo/tree/master/coroutinesDemo​​



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