這篇文章主要給大家介紹了關於RxJava和Retrofit2的統一處理單個請求的相關資料,文中通過示例代碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友們下面隨着小編來一起學習學習吧
前言
RxJava和Retrofit2用了一段時間了,寫個小例子,分享出來,有什麼不對的地方還請大神在評論區指正。
什麼是Retrofit2
官網是這麼介紹的:
Retrofit adapts a Java interface to HTTP calls by using annotations on the declared methods to
define how requests are made。
我翻譯的可能不準確,他的大概意思是說:Retrofit 是一個 java 接口類,以註解的方式用於 HTTP 網絡請求。那下面我們一起來看看是怎麼使用的?
發現問題
最近在幫兄弟公司做一個資訊類的項目,使用了RxJava和Retrofit2這對黃金組合,在編寫代碼的過程中發現有很多很多的網絡請求都需要做.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).onErrorReturn()
的處理,爲避免這樣,需要沉思。
解決問題
import android.util.Log; import com.wei.caiqiwang.data.entity.BaseResponse; import rx.Observable; import rx.Subscriber; import rx.Subscription; import rx.android.schedulers.AndroidSchedulers; import rx.functions.Func1; import rx.schedulers.Schedulers; public class RxNet { /** * 統一處理單個請求 */ public static <T> Subscription request(Observable<BaseResponse<T>> observable, final RxNetCallBack<T> callBack) { return observable .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .onErrorReturn(new Func1<Throwable, BaseResponse<T>>() { @Override public BaseResponse<T> call(Throwable throwable) { Log.v("LinNetError",throwable.getMessage()); callBack.onFailure(ExceptionHandle.handleException(throwable)); return null; } }) .subscribe(new Subscriber<BaseResponse<T>>() { @Override public void onCompleted() { } @Override public void onError(Throwable e) { } @Override public void onNext(BaseResponse<T> baseResponse) { if (baseResponse.getCode().equals("200")) { callBack.onSuccess(baseResponse.getData()); } else { callBack.onFailure(baseResponse.getMsg()); } } }); } /** * 統一處理單個請求沒有 msg body */ public static Subscription requestWithoutBody(Observable<BaseResponse> observable, final RxNetCallBack<String> callBack) { return observable .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .onErrorReturn(new Func1<Throwable, BaseResponse>() { @Override public BaseResponse call(Throwable throwable) { callBack.onFailure(ExceptionHandle.handleException(throwable)); return null; } }) .subscribe(new Subscriber<BaseResponse>() { @Override public void onCompleted() { } @Override public void onError(Throwable e) { } @Override public void onNext(BaseResponse baseResponse) { if (baseResponse.getCode().equals("200")) { callBack.onSuccess(baseResponse.getMsg()); } else { callBack.onFailure(baseResponse.getMsg()); } } }); } }
回調就是普通的回調
public interface RxNetCallBack<T> { /** * 數據請求成功 * * @param data 請求到的數據 */ void onSuccess(T data); /** * 數據請求失敗 */ void onFailure(String msg); }
錯誤異常處理(可能不全):
import android.net.ParseException; import com.google.gson.JsonParseException; import org.apache.http.conn.ConnectTimeoutException; import org.json.JSONException; import java.net.ConnectException; import retrofit2.HttpException; public class ExceptionHandle { private static final int UNAUTHORIZED = 401; private static final int FORBIDDEN = 403; private static final int NOT_FOUND = 404; private static final int REQUEST_TIMEOUT = 408; private static final int INTERNAL_SERVER_ERROR = 500; private static final int BAD_GATEWAY = 502; private static final int SERVICE_UNAVAILABLE = 503; private static final int GATEWAY_TIMEOUT = 504; public static String handleException(Throwable e) { String errorMsg; if (e instanceof HttpException) { HttpException httpException = (HttpException) e; switch (httpException.code()) { case UNAUTHORIZED: case FORBIDDEN: case NOT_FOUND: case REQUEST_TIMEOUT: case GATEWAY_TIMEOUT: case INTERNAL_SERVER_ERROR: case BAD_GATEWAY: case SERVICE_UNAVAILABLE: default: errorMsg = "網絡錯誤"; break; } return errorMsg + ":" + httpException.code(); } else if (e instanceof JsonParseException || e instanceof JSONException || e instanceof ParseException) { return "解析錯誤"; } else if (e instanceof ConnectException) { return "連接失敗"; } else if (e instanceof javax.net.ssl.SSLHandshakeException) { return "證書驗證失敗"; } else if (e instanceof ConnectTimeoutException) { return "連接超時"; } else if (e instanceof java.net.SocketTimeoutException) { return "連接超時"; } else { return "未知錯誤"; } } }
然後就是ApiManager:
import android.util.Log; import com.wei.demo.data.AppConstants; import java.util.concurrent.TimeUnit; import okhttp3.OkHttpClient; import okhttp3.logging.HttpLoggingInterceptor; import retrofit2.Retrofit; import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory; import retrofit2.converter.gson.GsonConverterFactory; public class ApiManager { private Retrofit client; private ApiManager() { client = new Retrofit.Builder() .baseUrl(AppConstants.Base_Url_Api_Test) .client(initClient()) .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build(); } private static volatile DemoApi INSTANCE; public static DemoApi getInstance() { if (INSTANCE == null) { synchronized (ApiManager.class) { if (INSTANCE == null) { INSTANCE = new ApiManager().getApi(); } } } return INSTANCE; } private DemoApi getApi() { return client.create(DemoApi.class); } private static OkHttpClient initClient() { OkHttpClient.Builder builder = new OkHttpClient.Builder(); //聲明日誌類 HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() { @Override public void log(String message) { Log.v("NetLog", message); } }); //設定日誌級別 httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY); //延時 builder.addInterceptor(httpLoggingInterceptor) .connectTimeout(10, TimeUnit.SECONDS) .readTimeout(10, TimeUnit.SECONDS) .writeTimeout(10, TimeUnit.SECONDS); return builder.build(); } }
怎麼用?
RxNet.request(ApiManager.getInstance().getUserMsg(map), new RxNetCallBack<List<MsgBean>>() { @Override public void onSuccess(List<MsgBean> data) { // 處理數據 } @Override public void onFailure(String msg) { //出現了錯誤 showToast(msg); } });
Demo https://github.com/FriendLin/NetRequestDemo (本地下載)
總結
以上就是這篇文章的全部內容了,希望本文的內容對大家的學習或者工作具有一定的參考學習價值,如果有疑問大家可以留言交流,謝謝大家對神馬文庫的支持。