Android开发(Kotlin) retrofit基本使用教程
<p>导入retrofit</p><div class="jb51code"><pre class="brush:plain;">dependencies {
........
implementation("com.squareup.retrofit2:retrofit:3.0.0")
implementation("com.squareup.retrofit2:converter-gson:3.0.0")
}</pre></div>
<p>创建单例类</p>
<div class="jb51code"><pre class="brush:java;">object ServiceCreator {
private const val BASE_URL = "https://7a6396f8-09a1-4ade-b42a-f6db7776fb31.mock.pstmn.io"
private val retrofit = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build()
fun <T> create(serviceClass: Class<T>): T = retrofit.create(serviceClass)
}</pre></div>
<p>创建数据类<br />数据格式</p>
<div class="jb51code"><pre class="brush:json;">{
"data": [
{
"random": "3",
"def": "中止，停顿；归属待定，暂搁",
"word": "abeyance"
}
]
}</pre></div>
<div class="jb51code"><pre class="brush:java;">data classWordListBean(val data: List<WordBean>)
data class WordBean(val random: String, val def: String, val word: String)</pre></div>
<p>配置接口</p>
<div class="jb51code"><pre class="brush:java;">interface AppService {
@GET("/flutter")
fun getData(): Call<WordListBean>
}</pre></div>
<p>调用网络接口</p>
<div class="jb51code"><pre class="brush:java;"> binding.clickButC.setOnClickListener {
val appService = ServiceCreator.create(AppService::class.java)
appService.getData().enqueue(object : Callback<WordListBean>{
override fun onResponse(call: Call<WordListBean?>, response: Response<WordListBean?>) {
Log.d("ClickActivity",response.body().toString())
}
override fun onFailure(call: Call<WordListBean?>, t: Throwable) {
Log.d("ClickActivity",t.toString())
}
})
}</pre></div>
<p>打印结果</p>
<blockquote><p>2025-11-15 01:07:28.592 23340-23340 ClickActivity <br />com.bz.yh.xd.testkotlin <br />D WordListBean(data=)</p></blockquote>
<p>使用实化来优化ServiceCreator</p>
<div class="jb51code"><pre class="brush:java;">object ServiceCreator {
private const val BASE_URL = "https://7a6396f8-09a1-4ade-b42a-f6db7776fb31.mock.pstmn.io"
private val retrofit = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build()
inline fun <reified T> create(): T = create(T::class.java)
}</pre></div>
<div class="jb51code"><pre class="brush:java;"> binding.clickButC.setOnClickListener {
val appService = ServiceCreator.create<AppService>()
appService.getData().enqueue(object : Callback<WordListBean>{
override fun onResponse(call: Call<WordListBean?>, response: Response<WordListBean?>) {
Log.d("ClickActivity",response.body().toString())
}
override fun onFailure(call: Call<WordListBean?>, t: Throwable) {
Log.d("ClickActivity",t.toString())
}
})
}</pre></div>
<p>其他<br />声明网络权限</p>
<div class="jb51code"><pre class="brush:java;"> <uses-permission android:name="android.permission.INTERNET" /></pre></div>
<p>配置networkSecurityConfig，使用http</p>
<div class="jb51code"><pre class="brush:java;"><application
.....
android:networkSecurityConfig="@xml/network_security_config"></pre></div>
<p>network_security_config.xml</p>
<div class="jb51code"><pre class="brush:xml;"><?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<base-config cleartextTrafficPermitted="true"/>
</network-security-config></pre></div>
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