一、环境配置
1.1 添加网络权限
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
1.2 Retrofit、RxJava工具包加入
//Rxjava
compile 'io.reactivex.rxjava2:rxjava:2.1.6'
compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
//Retrofit
compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'com.squareup.retrofit2:converter-gson:2.3.0'
compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.8.0'
1.3 配置Retrofit支持Gson和RxJava
mRetrofit = new Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create(new GsonBuilder().create()))//支持Gson转换
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())//支持RxJava
.baseUrl(ApiConstants.API_SERVER)
.client(mClient)
.build();
1.4 配置Header
Interceptor mHeaderInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
Request.Builder builder = originalRequest.newBuilder();
//设置具体的Head内容
builder.header("timestamp", System.currentTimeMillis() + "");
Request.Builder requestBuilder =
builder.method(originalRequest.method(), originalRequest.body());
Request request = requestBuilder.build();
return chain.proceed(request);
}
};
1.5 缓存配置
private Interceptor mCacheInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
if (!NetworkUtils.isNetworkAvailable(Initialization.getContext())) {
request = request.newBuilder()
.cacheControl(CacheControl.FORCE_CACHE).build();
}else{
request = request.newBuilder()
//网络可用 强制从网络获取数据
.cacheControl(CacheControl.FORCE_NETWORK)
.build();
}
Response response = chain.proceed(request);
if (NetworkUtils.isNetworkAvailable(MyApplication.getContext())) {
int maxAge = 60; //缓存一分钟
String cacheControl = "public,max-age=" + maxAge;
return response.newBuilder()
.header("Cache-Control",cacheControl)
.removeHeader("Pragma").build();
} else {
int maxStale = 60 * 60 * 24 * 7 * 4; //4周
return response.newBuilder()
.header("Cache-Control", "public,only-if-cached,max-stale=" + maxStale)
.removeHeader("Pragma").build();
}
}
};
1.6 配置OkHttpClient
//设置缓存路径
File httpCacheDirectory = new File(MyApplication.getContext().getCacheDir(), "RetrofitCache");
int cacheSize = 1024 * 1024 * 50; // 50 MiB
Cache cache = new Cache(httpCacheDirectory, cacheSize);
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
mClient = new OkHttpClient.Builder()
.addInterceptor(loggingInterceptor)//添加日志
.addInterceptor(mHeaderInterceptor)//添加Header
.addInterceptor(mCacheInterceptor)//添加缓存
.addNetworkInterceptor(mCacheInterceptor)
.cache(cache)
.connectTimeout(20, TimeUnit.SECONDS)//设置连接超时20秒
.build();
ApiRetrofit完整代码
package com.wj.rxcode.api;
import com.google.gson.GsonBuilder;
import com.wj.rxcode.MyApplication;
import com.wj.rxcode.utils.NetworkUtils;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import okhttp3.Cache;
import okhttp3.CacheControl;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
public class ApiRetrofit {
private static ApiRetrofit mApiRetrofit;
private final Retrofit mRetrofit;
private OkHttpClient mClient;
private ApiService mApiService;
public static ApiRetrofit getInstance() {
if (mApiRetrofit == null) {
synchronized (Object.class) {
if (mApiRetrofit == null) {
mApiRetrofit = new ApiRetrofit();
}
}
}
return mApiRetrofit;
}
public ApiService getApiService() {
return mApiService;
}
public ApiRetrofit() {
//设置缓存路径
File httpCacheDirectory = new File(MyApplication.getContext().getCacheDir(), "RetrofitCache");
int cacheSize = 1024 * 1024 * 50; // 50 MiB
Cache cache = new Cache(httpCacheDirectory, cacheSize);
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
mClient = new OkHttpClient.Builder()
.addInterceptor(loggingInterceptor)//添加日志
.addInterceptor(mHeaderInterceptor)//添加Header
.addInterceptor(mCacheInterceptor)//添加缓存
.addNetworkInterceptor(mCacheInterceptor)
.cache(cache)
.connectTimeout(20, TimeUnit.SECONDS)//设置连接超时20秒
.build();
mRetrofit = new Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create(new GsonBuilder().create()))//支持Gson转换
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())//支持RxJava
.baseUrl(ApiConstants.API_SERVER)
.client(mClient)
.build();
mApiService = mRetrofit.create(ApiService.class);
}
//缓存配置
private Interceptor mCacheInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
if (!NetworkUtils.isNetworkAvailable(Initialization.getContext())) {
request = request.newBuilder()
.cacheControl(CacheControl.FORCE_CACHE).build();
}else{
request = request.newBuilder()
//网络可用 强制从网络获取数据
.cacheControl(CacheControl.FORCE_NETWORK)
.build();
}
Response response = chain.proceed(request);
if (NetworkUtils.isNetworkAvailable(MyApplication.getContext())) {
int maxAge = 60; //缓存一分钟
String cacheControl = "public,max-age=" + maxAge;
return response.newBuilder()
.header("Cache-Control",cacheControl)
.removeHeader("Pragma").build();
} else {
int maxStale = 60 * 60 * 24 * 7 * 4; //4周
return response.newBuilder()
.header("Cache-Control", "public,only-if-cached,max-stale=" + maxStale)
.removeHeader("Pragma").build();
}
}
};
Interceptor mHeaderInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
Request.Builder builder = originalRequest.newBuilder();
//设置具体的Head内容
builder.header("timestamp", System.currentTimeMillis() + "");
Request.Builder requestBuilder =
builder.method(originalRequest.method(), originalRequest.body());
Request request = requestBuilder.build();
return chain.proceed(request);
}
};
}
ApiConstants网络接口常量
package com.wj.rxcode.api;
/**
* Created by wj on 2017/11/17 13:23.
*/
public class ApiConstants {
//好奇心日报
public static final String API_SERVER = "http://app3.qdaily.com/";
//http://app3.qdaily.com/app3/papers/detail/2014.json
public static final String API_PAPERS_DETAIL="app3/papers/detail/2014.json";
}
ApiService接口
package com.wj.rxcode.api;
import com.wj.rxcode.bean.PapersDetailBean;
import io.reactivex.Observable;
import retrofit2.http.GET;
public interface ApiService {
@GET(ApiConstants.API_PAPERS_DETAIL)
Observable<PapersDetailBean> getPaperDetail();
}
二、使用
package com.wj.rxcode;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import com.wj.rxcode.api.ApiRetrofit;
import com.wj.rxcode.api.ApiService;
import com.wj.rxcode.bean.PapersDetailBean;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.disposables.Disposable;
import io.reactivex.schedulers.Schedulers;
public class MainActivity extends AppCompatActivity {
private ApiService apiService;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
apiService = ApiRetrofit.getInstance().getApiService();
getPaperDetail();
}
private void getPaperDetail(){
Observer<PapersDetailBean> observer= new Observer<PapersDetailBean>() {
//开始请求
@Override
public void onSubscribe(Disposable d) {
Log.i("RxJava","开始请求");
}
//请求完成
@Override
public void onComplete() {
Log.i("RxJava","请求完成");
}
//请求失败
@Override
public void onError(Throwable e) {
Log.i("RxJava","请求失败");
}
//请求成功
@Override
public void onNext(PapersDetailBean bean) {
Log.i("RxJava","请求成功");
}
};
Observable<PapersDetailBean> paperDetail = apiService.getPaperDetail();
paperDetail.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(observer);
}
}
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