推荐阅读，猛戳：
1、Android MVP 实例
2、Android Retrofit 2.0使用
3、RxJava
4、RxBus
5、Android MVP+Retrofit+RxJava实践小结
之前分享的Android Retrofit 2.0 使用，属于基本的使用，实际开发还远远不够，因此对其补充，主要在Retrofit配置和接口参数。
Retrofit配置
添加依赖
app/build.gradle
compile 'com.squareup.retrofit2:retrofit:2.0.2'
首先Builder()，得到OkHttpClient.Builder对象builder
OkHttpClient.Builder builder = new OkHttpClient.Builder();
Log信息拦截器
Debug可以看到，网络请求，打印Log信息，发布的时候就不需要这些log
1、添加依赖
app/build.gradle
compile 'com.squareup.okhttp3:logging-interceptor:3.1.2'
2、Log信息拦截器
if (BuildConfig.DEBUG) {
// Log信息拦截器
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
//设置 Debug Log 模式
builder.addInterceptor(loggingInterceptor);
}
缓存机制
无网络时，也能显示数据
File cacheFile = new File(DemoApplication.getContext().getExternalCacheDir(), "WuXiaolongCache");
Cache cache = new Cache(cacheFile, 1024 * 1024 * 50);
Interceptor cacheInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
if (!AppUtils.networkIsAvailable(DemoApplication.getContext())) {
request = request.newBuilder()
.cacheControl(CacheControl.FORCE_CACHE)
.build();
}
Response response = chain.proceed(request);
if (AppUtils.networkIsAvailable(DemoApplication.getContext())) {
int maxAge = 0;
// 有网络时 设置缓存超时时间0个小时
response.newBuilder()
.header("Cache-Control", "public, max-age=" + maxAge)
.removeHeader("WuXiaolong")// 清除头信息，因为服务器如果不支持，会返回一些干扰信息，不清除下面无法生效
.build();
} else {
// 无网络时，设置超时为4周
int maxStale = 60 * 60 * 24 * 28;
response.newBuilder()
.header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
.removeHeader("nyn")
.build();
}
return response;
}
};
builder.cache(cache).addInterceptor(cacheInterceptor);
公共参数
可能接口有某些参数是公共的，不可能一个个接口都去加吧
//公共参数
Interceptor addQueryParameterInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
Request request;
String method = originalRequest.method();
Headers headers = originalRequest.headers();
HttpUrl modifiedUrl = originalRequest.url().newBuilder()
// Provide your custom parameter here
.addQueryParameter("platform", "android")
.addQueryParameter("version", "1.0.0")
.build();
request = originalRequest.newBuilder().url(modifiedUrl).build();
return chain.proceed(request);
}
};
//公共参数
builder.addInterceptor(addQueryParameterInterceptor);
设置头
有的接口可能对请求头要设置
Interceptor headerInterceptor = new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
Request.Builder requestBuilder = originalRequest.newBuilder()
.header("AppType", "TPOS")
.header("Content-Type", "application/json")
.header("Accept", "application/json")
.method(originalRequest.method(), originalRequest.body());
Request request = requestBuilder.build();
return chain.proceed(request);
}
};
//设置头
builder.addInterceptor(headerInterceptor );
设置cookie
服务端可能需要保持请求是同一个cookie，主要看各自需求
1、app/build.gradle
compile 'com.squareup.okhttp3:okhttp-urlconnection:3.2.0'
2、设置cookie
CookieManager cookieManager = new CookieManager();
cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
builder.cookieJar(new JavaNetCookieJar(cookieManager));
设置超时和重连
希望超时时能重连
//设置超时
builder.connectTimeout(15, TimeUnit.SECONDS);
builder.readTimeout(20, TimeUnit.SECONDS);
builder.writeTimeout(20, TimeUnit.SECONDS);
//错误重连
builder.retryOnConnectionFailure(true);
最后将这些配置设置给retrofit：
OkHttpClient okHttpClient = builder.build();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(ApiStores.API_SERVER_URL)
//设置 Json 转换器
.addConverterFactory(GsonConverterFactory.create())
//RxJava 适配器
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.client(okHttpClient)
.build();
完整配置
public class AppClient {
public static Retrofit retrofit = null;
public static Retrofit retrofit() {
if (retrofit == null) {
OkHttpClient.Builder builder = new OkHttpClient.Builder();
/**
*设置缓存，代码略
*/
/**
* 公共参数，代码略
*/
/**
* 设置头，代码略
*/
/**
* Log信息拦截器，代码略
*/
/**
* 设置cookie，代码略
*/
/**
* 设置超时和重连，代码略
*/
//以上设置结束，才能build(),不然设置白搭
OkHttpClient okHttpClient = builder.build();
retrofit = new Retrofit.Builder()
.baseUrl(ApiStores.API_SERVER_URL)
.client(okHttpClient)
.build();
}
return retrofit;
}
}
接口参数
Path
类似这样链接：http://wuxiaolong.me/2016/01/15/retrofit/
@GET("2016/01/15/{retrofit}")
Call<ResponseBody> getData(@Path("retrofit") String retrofit);
即您传的参数retrofit内容会替换大括号里的内容。
Query
类似这样链接：http://wuxiaolong.me/v1?ip=202.202.33.33&name=WuXiaolong
@GET("v1")
Call<ResponseBody> getData(@Query("ip") String ip,@Query("name") String name);
Field
表单提交，如登录
@FormUrlEncoded
@POST("v1/login")
Call<ResponseBody> userLogin(@Field("phone") String phone, @Field("password") String password);
传json格式
如果参数是json格式，如：
{
"apiInfo": {
"apiName": "WuXiaolong",
"apiKey": "666"
}
}
建立Bean
public class ApiInfo {
private ApiInfoBean apiInfo;
public ApiInfoBean getApiInfo() {
return apiInfo;
}
public void setApiInfo(ApiInfoBean apiInfo) {
this.apiInfo = apiInfo;
}
public class ApiInfoBean {
private String apiName;
private String apiKey;
//省略get和set方法
}
}
ApiStores
@POST("client/shipper/getCarType")
Call<ResponseBody> getData(@Body ApiInfo apiInfo);
代码调用
ApiInfo apiInfo = new ApiInfo();
ApiInfo.ApiInfoBean apiInfoBean = apiInfo.new ApiInfoBean();
apiInfoBean.setApiKey("666");
apiInfoBean.setApiName("WuXiaolong");
apiInfo.setApiInfo(apiInfoBean);
//调接口
getData(apiInfo);
传数组
@GET("v1/enterprise/find")
Call<ResponseBody> getData(@Query("id") String id, @Query("linked[]") String... linked);
代码调用
String id="WuXiaolong"；
String[] s = new String[]{"WuXiaolong"};
//调接口
getData(id, s);
传文件-单个
@Multipart
@POST("v1/create")
Call<ResponseBody> create(@Part("pictureName") RequestBody pictureName, @Part MultipartBody.Part picture);
代码调用
RequestBody pictureNameBody = RequestBody.create(MediaType.parse(AppConstants.CONTENT_TYPE_FILE), "pictureName");
File picture= new File(path);
RequestBody requestFile = RequestBody.create(MediaType.parse(AppConstants.CONTENT_TYPE_FILE), picture);
// MultipartBody.Part is used to send also the actual file name
MultipartBody.Part picturePart = MultipartBody.Part.createFormData("picture", picture.getName(), requestFile);
//调接口
create(pictureNameBody, picturePart);
传文件-多个
@Multipart
@POST("v1/create")
Call<ResponseBody> create(@Part("pictureName") RequestBody pictureName, @PartMap Map<String, RequestBody> params);
代码调用
RequestBody pictureNameBody = RequestBody.create(MediaType.parse(AppConstants.CONTENT_TYPE_FILE), "pictureName");
File picture= new File(path);
RequestBody requestFile = RequestBody.create(MediaType.parse(AppConstants.CONTENT_TYPE_FILE), picture);
Map<String, RequestBody> params = new HashMap<>();
params.put("picture\"; filename=\"" + picture.getName() + "", requestFile);
//调接口
create(pictureNameBody, params);
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public class CacheInterceptor implements Interceptor{
@Override
public Response intercept(Interceptor.Chain chain) throws IOException {
Request request = chain.request();
if (!AppUtils.isNetworkAvailable(MainApplication.getInstance())) {
request = request.newBuilder()
.cacheControl(CacheControl.FORCE_CACHE)
.build();
}
Response response = chain.proceed(request);
if (AppUtils.isNetworkAvailable(MainApplication.getInstance())) {
int maxAge = 0;
// 有网络时 设置缓存超时时间0个小时
response.newBuilder()
.header("Cache-Control", "public, max-age=" + maxAge)
.build();
} else {
// 无网络时，设置超时为4周
int maxStale = 60 * 60 * 24 * 28 ;
response.newBuilder()
.header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
.removeHeader("nyn")
.build();
}
return response;
}
}
File cacheFile = MainApplication.getInstance().getApplicationContext().getCacheDir();
if (cacheFile != null) {
File directory = new File(cacheFile, "HttpResponseCache");
builder.cache(new Cache(directory, HTTP_RESPONSE_DISK_CACHE_MAX_SIZE));
}
builder.addInterceptor(new CacheInterceptor());
.header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
.removeHeader("nyn")
.build(); 。不要返回return response。