Android Kotlin Retrofit MVP网络请求封装（四）
依赖
implementation 'com.squareup.retrofit2:retrofit:2.9.0' implementation 'com.google.code.gson:gson:2.8.8' implementation 'com.squareup.okhttp3:okhttp:4.9.1' implementation 'com.squareup.retrofit2:retrofit:2.9.0' implementation 'com.squareup.retrofit2:converter-gson:2.9.0' implementation 'com.squareup.retrofit2:converter-scalars:2.9.0' implementation 'com.google.code.gson:gson:2.8.6' implementation 'com.squareup.okhttp3:logging-interceptor:3.11.0'
AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
上下文
package com.example.app import android.app.Application import android.content.Context /** *@author: jst *@date: 2023/6/19 0000 18:01 *@desc: 上下文 */ class App : Application() { companion object { private var context: Context? = null fun getContext(): Context? { return context } } override fun onCreate() { super.onCreate() context = applicationContext } }
application中加
android:name=".App"
新建http，entity软件包
http网络连接请求封装
entity 实体
在http中封装Result 回调类（接口返回类）
package com.example.app.http /** *@author: jst *@date: 2023/6/19 0000 18:01 *@desc: 回调数据 */ class Result<T> { /* var errorMsg: String? = null var errorCode: String? = null var data: T? = null */ var res: Int? = 0 var msg: String? = null }
在entity实体中封装UserBean
package com.example.app.entity class UserBean { }
在http中封装接口请求基本回调抽象类
package com.example.app.http import android.util.Log import android.widget.Toast import retrofit2.Call import retrofit2.Callback import retrofit2.Response import retrofit2.internal.EverythingIsNonNull import java.net.UnknownHostException import com.example.app.App /** *@author: jst *@date: 2023/6/19 0000 18:01 *@desc: 接口请求基本回调 */ abstract class SingleCallback<T : Result<*>?> : Callback<T> { override fun onResponse( call: Call<T>, response: Response<T> ) { val result = response.body() if (result == null) { onFailure("-99", "接口请求失败", null) } else { if (apiFailure(result)) { onFailure(result.msg, result.msg ?: "", result) } else { onSuccess(result) } } } @EverythingIsNonNull override fun onFailure(call: Call<T>, t: Throwable) { Log.e("SingleCallback", "onFailure: " + t.message, t) if (t is UnknownHostException) { onFailure("-99", "接口请求失败", null) } else if (!"socket closed".equals(t.localizedMessage, ignoreCase = true) && !"canceled".equals(t.localizedMessage, ignoreCase = true) ) { onFailure("-999", "接口请求失败", null) } } fun successCode(): Int { return 1 } fun apiFailure(result: T?): Boolean { return result == null || successCode() != result.res } /** * 失败回调。默认已经将失败信息提示出来 */ fun onFailure(code: String?, message: String, response: T?) { Toast.makeText(App.getContext(), message, Toast.LENGTH_SHORT).show() } abstract fun onSuccess(response: T) }
在http中封装请求工具类HttpHelper
package com.example.app.http import com.google.gson.GsonBuilder import okhttp3.OkHttpClient import okhttp3.logging.HttpLoggingInterceptor import retrofit2.Retrofit import retrofit2.converter.gson.GsonConverterFactory import retrofit2.converter.scalars.ScalarsConverterFactory import java.util.concurrent.TimeUnit /** *@author: jst *@date: 2023/6/19 0000 18:01 *@desc: 接口请求工具类 */ class HttpHelper { companion object { private val BASE_URL = "https:www.baidu.com" //接口域名 private var sHttpClient: OkHttpClient? = null private var sApi: Api? = null fun getHttpClient(): OkHttpClient? { if (sHttpClient == null) { synchronized(HttpHelper::class.java) { if (sHttpClient == null) { val builder = OkHttpClient.Builder() /** * 打印日志 */ var interceptor = HttpLoggingInterceptor() interceptor.level = HttpLoggingInterceptor.Level.BODY builder.addInterceptor(interceptor) sHttpClient = builder .callTimeout(40, TimeUnit.SECONDS) .connectTimeout(40, TimeUnit.SECONDS) .readTimeout(40, TimeUnit.SECONDS) .writeTimeout(40, TimeUnit.SECONDS) .build() } } } return sHttpClient } fun getApi(): Api? { if (sApi == null) { synchronized(HttpHelper::class.java) { if (sApi == null) { val retrofit = createRetrofit(BASE_URL) sApi = retrofit.create(Api::class.java) } } } return sApi } private fun createRetrofit(baseUrl: String): Retrofit { val gsonBuilder = GsonBuilder() return Retrofit.Builder() .client(getHttpClient()) .baseUrl(baseUrl) .addConverterFactory(ScalarsConverterFactory.create()) .addConverterFactory(GsonConverterFactory.create(gsonBuilder.create())) .build() } } }
在http中新建Api接口
package com.example.app.http import com.example.app.entity.UserBean import okhttp3.ResponseBody import retrofit2.Call import retrofit2.http.* import retrofit2.http.Field; import retrofit2.http.FormUrlEncoded; import retrofit2.http.GET; import retrofit2.http.POST; import retrofit2.http.Query; /** *@author: jst *@date: 2023/6/19 0000 18:01 *@desc: 接口 */ interface Api { /** * 登录 */ @POST("/api/PDA/Checkuseradmin") @FormUrlEncoded fun login(@Field("username") account: String, @Field("password") password: String): Call<Result<UserBean>> /** * 登录 */ @GET("/api/PDA/Checkuseradmin") fun loginS(@Query("username") username:String,@Query("password") password: String):Call<Result<UserBean>> /** * 退出 */ @GET("/user/logout/json") fun logout(): Call<kotlin.Result<String>> }
在model 登录实现类中调接口实现登录
HttpHelper.getApi()?.loginS(userName, password) ?.enqueue(object : SingleCallback<Result<UserBean>>() { override fun onSuccess(response: Result<UserBean>) { if (1 == response.res) { onLoginListener.onSuccess() } else { onLoginListener.onError() } } })
效果
