Retrofit的簡單封裝

摘要： RequestData：網路返回的資料 Http：retrofit的網路例項化 RetrofitService：網路的介面註解顯示 Server：網路介面的呼叫顯示 SSLSocketFactoryUtils：https的處理 1....

• RequestData：網路返回的資料
• Http：retrofit的網路例項化
• RetrofitService：網路的介面註解顯示
• Server：網路介面的呼叫顯示
• SSLSocketFactoryUtils：https的處理

1.配置build.gradle

implementation 'com.squareup.retrofit2:retrofit:2.4.0'
//okhttp3的日誌列印
implementation 'com.squareup.okhttp3:logging-interceptor:3.11.0'
//retrofit的gson解析
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
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2.新建網路返回資料RequestData

public class RequestData {
private String msg;
private int status;
private ArrayList<Data> data;

public String getMsg() {
return msg;
}

public void setMsg(String msg) {
this.msg = msg;
}

public int getStatus() {
return status;
}

public void setStatus(int status) {
this.status = status;
}

public ArrayList<Data> getData() {
return data;
}

public void setData(ArrayList<Data> data) {
this.data = data;
}

@Override
public String toString() {
return "msg = " + msg + "status = " + status;
}
}
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3.新增https的校驗

public class SSLSocketFactoryUtils {
/*
* 預設信任所有的證書
* */
public static SSLSocketFactory createSSLSocketFactory() {
SSLSocketFactory sslSocketFactory = null;
try {
SSLContext sslContext = SSLContext.getInstance("SSL");
sslContext.init(null, new TrustManager[]{createTrustAllManager()}, new SecureRandom());
sslSocketFactory = sslContext.getSocketFactory();
} catch (Exception e) {

}
return sslSocketFactory;
}

public static X509TrustManager createTrustAllManager() {
X509TrustManager tm = null;
try {

tm =new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
//do nothing，接受任意客戶端證書
}

public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
//do nothing，接受任意服務端證書
}

public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
};
} catch (Exception e) {

}
return tm;
}
}
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4.例項化Retrofit

public class Http {
private static Http mInstance;

//單利模式
public static Http getInstance() {
if (mInstance == null) {
synchronized (Http.class) {
if (mInstance == null) {
mInstance = new Http();
}
}
}
return mInstance;
}

public Retrofit getRetrofit(){
HttpLoggingInterceptor loggingInterceptor;
//列印網路請求相關日誌
loggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
@Override
public void log(String message) {
//列印retrofit日誌
Log.i("retrofitLog: ", message);
}
});
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

//為了列印日誌，需要配置OkHttpClient
OkHttpClient client = new OkHttpClient.Builder()
//配置SSlSocketFactory
.sslSocketFactory(SSLSocketFactoryUtils.createSSLSocketFactory())
.addInterceptor(loggingInterceptor)
.build();

Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Config.DOMAIN) // 設定 網路請求 Url
.client(client)
.addConverterFactory(GsonConverterFactory.create()) //設定使用Gson解析(記得加入依賴)
.build();

return retrofit;
}

public RetrofitService getRetrofitService(){
return getInstance().getRetrofit().create(RetrofitService.class);
}
}
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5.初始化RetrofitService介面註解

public interface RetrofitService {
@GET("/api/user/modules")
Call<RequestData> getModuleList(@Query("token") String token);

@GET("/api/user/logout")
Call<RequestData> logOutRequest(@Query("token") String token);
}
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6.外部呼叫介面

public class Server {
public static void getModuleList(String token,Callback<RequestData> callback){
Http.getInstance().getRetrofitService().getModuleList(token).enqueue(callback);
}

public static void logOutRequest(String token,Callback<RequestData> callback){
Http.getInstance().getRetrofitService().logOutRequest(token).enqueue(callback);
}
}
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目前介面使用同異步的網路請求.enqueue();

直接呼叫 Server.getModuleList()方法就可以

在使用過程中可以根據需求調整