一、Retrofit 註解脈絡圖java
二、請求類web
2.1.1 @GETjson
對應get網絡請求api
結合@Path、@Query、@QueryMap使用跨域
GET後面的url中可使用自定義的變量,如 {id}、{userId}進行站位 ,並使用 @Path("id") 、@Path("userId") 註解爲 {id} 、{userId} 提供值緩存
以下:注意形如形如「?page/xxx/id/aaa」才能使用@Path來拼接url安全
@GET("page/{index}/id/{id}") Call<ImageBeans> requestImage(@Path("key") int index,@Path("id") int id);
可是可能有人會想到既然是佔位符,那麼下面的方式能夠嗎?服務器
@GET("?app=weather.future&weaid=1&&appkey={key}") Call<WeatherBeans> requestWeather(@Path("key") int key);
答案是不能夠,會報錯網絡
java.lang.IllegalArgumentException: URL query string "app=weather.future&weaid=1&&appkey={key}" must not have replace block. For dynamic query parameters use @Query.app
形如「?a=xxxx&b=xxxx&c=xxxx」的url是不能用@PATH註解來拼接的,應該使用@Query或者@QueryMap註解,以下:
@Query
一、接口定義 @GET("?") Call<WeatherBeans> requestWeather(@Query("app") String app ,@Query("weaid") int weaid , @Query("appkey") int appkey, @Query("sign") String sign, @Query("format") String format); 二、接口使用 private void doGet() { Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Call<WeatherBeans> call = netService.requestWeather("weather.future", 1, 10003, "b59bc3ef6191eb9f747dd4e83c99f2a4","json"); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("temperature", bean.getDays() +"|"+bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果打印 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-06|27℃/18℃ 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-07|27℃/16℃ 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-08|27℃/15℃ 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-09|28℃/17℃ 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-10|28℃/18℃ 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-11|27℃/18℃ 09-08 18:40:42.951 16451-16451/hq.demo.net D/temperature: 2018-09-12|27℃/17℃
@QueryMap
一、接口定義 @GET("?") Call<WeatherBeans> requestWeather(@QueryMap Map<String, String> paramas); 二、接口使用 private void doGet2() { Log.d("#####step", "#doGet2#"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Map paramas = new HashMap<>(); paramas.put("app","weather.future"); paramas.put("weaid","1"); paramas.put("appkey","10003"); paramas.put("sign","b59bc3ef6191eb9f747dd4e83c99f2a4"); paramas.put("format","json"); Call<WeatherBeans> call = netService.requestWeather(paramas); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("temperature", bean.getDays() +"|"+bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果打印: 09-08 19:16:43.669 18508-18508/hq.demo.net D/temperature: 2018-09-06|27℃/18℃ 09-08 19:16:43.670 18508-18508/hq.demo.net D/temperature: 2018-09-07|27℃/16℃ 09-08 19:16:43.670 18508-18508/hq.demo.net D/temperature: 2018-09-08|27℃/15℃ 09-08 19:16:43.670 18508-18508/hq.demo.net D/temperature: 2018-09-09|28℃/17℃ 09-08 19:16:43.670 18508-18508/hq.demo.net D/temperature: 2018-09-10|28℃/18℃ 09-08 19:16:43.670 18508-18508/hq.demo.net D/temperature: 2018-09-11|27℃/18℃ 09-08 19:16:43.670 18508-18508/hq.demo.net D/temperature: 2018-09-12|27℃/17℃
總結:@Query和@QueryMap註解會把參數拼接到url後面,因此它適用於GET請求
@Url
下面使用到的實體類能夠經過GsonFormat插件生成,自行先訪問下面url,具體可參照:JSON轉實體類 好用插件 GsonFormat
一、接口定義 @GET Call<Movies> requestMovies(@Url String url); 二、接口使用 public final static String requestUrl = "https://api.douban.com/v2/movie/top250?start=0&count=10"; private void getRequestMovieList() { Log.d("---------->", "doGet0"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://api.douban.com/v2/movie/") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Call<Movies> call = netService.requestMovies(requestUrl); call.enqueue(new Callback<Movies>() { @Override public void onResponse(Call<Movies> call, Response<Movies> response) { if (response.isSuccessful()) { Movies beans = response.body(); String title = beans.getTitle(); Log.d("##########title", "" + title); List<Movies.Movie> movies = beans.getSubjects(); for (Movies.Movie movie : movies) { String name = movie.getTitle(); Log.d("##########name", "" + name); } } } @Override public void onFailure(Call<Movies> call, Throwable t) { } }); } 三、結果打印 09-09 19:12:29.045 D/##########title: 豆瓣電影Top250 09-09 19:12:29.045 D/##########name: 肖申克的救贖 09-09 19:12:29.045 D/##########name: 霸王別姬 09-09 19:12:29.045 D/##########name: 這個殺手不太冷 09-09 19:12:29.045 D/##########name: 阿甘正傳 09-09 19:12:29.045 D/##########name: 美麗人生 09-09 19:12:29.045 D/##########name: 泰坦尼克號 09-09 19:12:29.045 D/##########name: 千與千尋 09-09 19:12:29.045 D/##########name: 辛德勒的名單 09-09 19:12:29.045 D/##########name: 盜夢空間 09-09 19:12:29.045 D/##########name: 機器人總動員
3.1.2 @POST
對應POST請求,不過須要結合@FormUrlEncoded來使用,
好比請求下面地址(這個地址是同時支持get、post請求的):
http://api.k780.com?app=weather.future&weaid=1&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json
可使用post訪問,結合@Field或@FieldMap作表單提交
@Field
一、接口定義 @POST("/") @FormUrlEncoded Call<WeatherBeans> requestWeatherBeans( @Field("app") String app, @Field("weaid") String weaid, @Field("appkey") String appkey, @Field("sign") String sign, @Field("format") String format); 二、接口使用 private void doPost() { Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Call<WeatherBeans> call = netService.requestWeatherBeans("weather.future","1","10003","b59bc3ef6191eb9f747dd4e83c99f2a4","json"); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("weather:", bean.getCitynm() +"|"+bean.getDays()+"|"+bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果輸出: 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-06|27℃/18℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-07|27℃/16℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-08|27℃/15℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-09|28℃/17℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-10|28℃/18℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-11|27℃/18℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-12|27℃/17℃
@FieldMap
一、接口定義 @POST("/") @FormUrlEncoded Call<WeatherBeans> requestWeatherBeans(@FieldMap Map<String, String> fields); 二、接口使用 private void doPost1() { Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Map paramas = new HashMap<>(); paramas.put("app","weather.future"); paramas.put("weaid","1"); paramas.put("appkey","10003"); paramas.put("sign","b59bc3ef6191eb9f747dd4e83c99f2a4"); paramas.put("format","json"); Call<WeatherBeans> call = netService.requestWeatherBeans(paramas); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("weather:", bean.getCitynm() +"|"+bean.getDays()+"|"+bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果輸出: 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-06|27℃/18℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-07|27℃/16℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-08|27℃/15℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-09|28℃/17℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-10|28℃/18℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-11|27℃/18℃ 09-08 19:06:42.255 17872-17872/hq.demo.net D/weather:: 北京|2018-09-12|27℃/17℃
@Body
@Body會將請求參數放到請求體中,因此適用於POST請求
@Body標籤不能和@FormUrlEncoded或@Multipart標籤同時使用,會報錯
註釋源碼
翻譯:若是要直接控制POST / PUT請求的請求主體(而不是做爲請求參數或表單樣式請求主體發送),請在服務方法參數上使用此批註。該對象將使用Retrofit實例Converter進行序列化,結果將直接設置爲請求正文。
/** * Use this annotation on a service method param when you want to directly control the request body * of a POST/PUT request (instead of sending in as request parameters or form-style request * body). The object will be serialized using the {@link Retrofit Retrofit} instance * {@link Converter Converter} and the result will be set directly as the * request body. * <p> * Body parameters may not be {@code null}. */ @Documented @Target(PARAMETER) @Retention(RUNTIME) public @interface Body { }
使用這個標籤的意思是咱們能夠定義個實體類來封裝參數,做爲請求參數,簡潔明瞭
@Body其實是將類轉換成json實體做爲請求體來請求網絡的,能夠抓包看
一、接口定義: public interface NetService { @POST("/") Call<WeatherBeans> requestWeatherBeans(@Body RequestParams parama); class RequestParams { public String app; public int weaid; public int appkey; public String sign; public String format; } } 二、接口使用 private void doPostWithBody() { Log.d("##########", "doPostWithBody"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); //建立以@Body註解post請求參數 NetService.RequestParams params = new NetService.RequestParams(); params.app = "weather.future"; params.weaid = 1; params.appkey = 10003; params.sign = "b59bc3ef6191eb9f747dd4e83c99f2a4"; params.format = "json"; Call<WeatherBeans> call = netService.requestWeatherBeans(params); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("weather:", bean.getCitynm() + "|" + bean.getDays() + "|" + bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果打印 因爲@Body其實是將類轉換成json實體做爲請求體來請求網絡,一時間沒找到能夠接受json格式的請求體做爲參數的網絡,所以這裏這是從形式說明怎麼使用,這是沒有問題,後面等我找到了能夠公開訪問的url地址再補上
常見錯誤1:@Body parameters cannot be used with form or multi-part encoding
注意:相比較前面的post請求去掉了@FormUrlEncoded註解,不然會報錯:
爲何會報錯,快捷鍵跟蹤一下@Body被使用的地方,在ServiceMethodlei中有源碼以下:
部分 else if (annotation instanceof Body) { if (isFormEncoded || isMultipart) { throw parameterError(p, "@Body parameters cannot be used with form or multi-part encoding."); } if (gotBody) { throw parameterError(p, "Multiple @Body method annotations found."); } Converter<?, RequestBody> converter; try { converter = retrofit.requestBodyConverter(type, annotations, methodAnnotations); } catch (RuntimeException e) { // Wide exception range because factories are user code. throw parameterError(e, p, "Unable to create @Body converter for %s", type); } gotBody = true; return new ParameterHandler.Body<>(converter); }
常見錯誤2:@Unable to create @Body converter for %s
在遇到對請求參數或者請求結果加密處理的時候GsonConverterFactory可能沒法知足咱們的需求,所以須要重寫GsonConverterFactory,這時候須要重寫兩個方法以下,注意兩個方法必須同時重寫,不然可能就報這個錯誤
@Override public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) { TypeAdapter<?> adapter = gson.getAdapter(TypeToken.get(type)); return new GsonResponseBodyConverter<>(gson, adapter); } @Override public Converter<?, RequestBody> requestBodyConverter(Type type, Annotation[] parameterAnnotations, Annotation[] methodAnnotations, Retrofit retrofit) { TypeAdapter<?> adapter = gson.getAdapter(TypeToken.get(type)); return new GsonRequestBodyConverter<>(gson, adapter); }
Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build();
2.1.3 @PUT
提交資源或者更新資源
將資源提交給服務器,若是請求的url地址已經在服務器上存在對應的資源了,則put請求提交的實體則會對其進行修改。
這裏就不舉例了
2.1.4 @DELETE
DELETE方法請求源服務器刪除Request-URI標識的資源。若是響應包括描述狀態的實體,則成功響應應爲200(OK),若是操做還沒有執行,則應爲202(已接受);若是操做已頒佈但響應不包括,則應爲204(無內容)一個實體。
DELETE方法與PUT相對應。
這裏就不舉例了
2.1.5 @PATCH
該請求是對PUT請求的補充,用於局部更新資源
這裏就不舉例了
2.1.6 @HEAD
@HEAD用來表示http請求中的head請求,head請求來源是HTTP1.0,HTTP1.0有三種請求方式GET、POST、HEAD。HTTP1.1新增了PUT、DELETE、OPTIONS、 TRACE 、CONNECT。
HEAD方法與GET相同,只是服務器不能在響應中返回消息體。響應HEAD請求的HTTP頭中包含的元信息應該與響應GET請求時發送的信息相同。該方法可用於得到關於請求所暗示的實體的元信息,而無需轉移實體主體自己。此方法一般用於測試超文本連接的有效性,可訪問性和最近的修改。
對HEAD請求的響應是可緩存的,由於響應中包含的信息可用於從該資源更新先前緩存的實體。若是新字段值指示緩存的實體與當前實體不一樣(如Content-Length,Content-MD5,ETag或Last-Modified中的更改所示),則緩存必須將緩存條目視爲陳舊。
使用場景:
@Headers({"Content-Type: application/json", "Cache-Control: max-age=360000"}) Call<WeatherBeans> requestWeatherBeansByHeaders();
2.1.7 @OPTIONS
OPTIONS請求主要用途有兩個:
這裏就不舉例說明了
2.1.8 @HTTP
@HTTP請求,可配置成以上7種中的任意一種
@HTTP配置get請求
一、接口定義 @HTTP(method = "GET", path = "?app=weather.future&weaid=1&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json", hasBody = false) Call<WeatherBeans> requestWeatherBeansByHttp(); 二、接口使用 private void doHttp() { Log.d("##########", "doHttp"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Call<WeatherBeans> call = netService.requestWeatherBeansByHttp(); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("weather:", bean.getCitynm() + "|" + bean.getDays() + "|" + bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果打印 09-09 11:59:30.099 北京|2018-09-07|27℃/16℃ 09-09 11:59:30.099 北京|2018-09-08|27℃/15℃ 09-09 11:59:30.099 北京|2018-09-09|27℃/16℃ 09-09 11:59:30.099 北京|2018-09-10|28℃/18℃ 09-09 11:59:30.099 北京|2018-09-11|27℃/18℃ 09-09 11:59:30.100 北京|2018-09-12|27℃/17℃ 09-09 11:59:30.100 北京|2018-09-13|28℃/18℃
@HTTP配置post請求
注意:
1)配置POST請求必須結合@FormUrlEncoded使用,否者會報錯
2)hasBody必須配置爲true,不然報錯
java.lang.IllegalArgumentException: FormUrlEncoded can only be specified on HTTP methods with request body (e.g., @POST).
for method NetService.requestWeatherBeansByHttpPost
一、接口定義 @HTTP(method = "POST", path = "?", hasBody = true) @FormUrlEncoded Call<WeatherBeans> requestWeatherBeansByHttpPost(@FieldMap Map<String, String> paramas); 二、接口使用 private void doHttpPost() { Log.d("##########", "doHttpPost"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://api.k780.com") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Map paramas = new HashMap<>(); paramas.put("app", "weather.future"); paramas.put("weaid", "1"); paramas.put("appkey", "10003"); paramas.put("sign", "b59bc3ef6191eb9f747dd4e83c99f2a4"); paramas.put("format", "json"); Call<WeatherBeans> call = netService.requestWeatherBeansByHttpPost(paramas); call.enqueue(new Callback<WeatherBeans>() { @Override public void onResponse(Call<WeatherBeans> call, Response<WeatherBeans> response) { if (response.isSuccessful()) { WeatherBeans beans = response.body(); for (WeatherBeans.ResultBean bean : beans.getResult()) { Log.d("weather:", bean.getCitynm() + "|" + bean.getDays() + "|" + bean.getTemperature()); } } } @Override public void onFailure(Call<WeatherBeans> call, Throwable t) { } }); } 三、結果打印 09-09 12:12:46.411 北京|2018-09-07|27℃/16℃ 09-09 12:12:46.411 北京|2018-09-08|27℃/15℃ 09-09 12:12:46.411 北京|2018-09-09|27℃/16℃ 09-09 12:12:46.411 北京|2018-09-10|28℃/18℃ 09-09 12:12:46.412 北京|2018-09-11|27℃/18℃
三、參數類註解
該類註解主要是結合上面8中註解使用,上面也都出現過部分,下面是總結
@Query、@QueryMap、@Url 、@Field、@FieldMap、@Body、@Headers 、@Header、@Part 、@PartMap 、@Path
public interface NetService { @GET("?") Call<WeatherBeans> requestWeather(@Query("app") String app, @Query("weaid") int weaid, @Query("appkey") int appkey, @Query("sign") String sign, @Query("format") String format); @GET("?") Call<WeatherBeans> requestWeather(@QueryMap Map<String, String> paramas); @GET Call<Movies> requestMovies(@Url String url); @POST("/") @FormUrlEncoded Call<WeatherBeans> requestWeatherBeans( @Field("app") String app, @Field("weaid") String weaid, @Field("appkey") String appkey, @Field("sign") String sign, @Field("format") String format); @POST("/") @FormUrlEncoded Call<WeatherBeans> requestWeatherBeans(@FieldMap Map<String, String> fields); @POST("/") Call<WeatherBeans> requestWeatherBeans(@Body RequestParams parama); class RequestParams { public String app; public int weaid; public int appkey; public String sign; public String format; } @Headers({"Content-Type: application/json", "Cache-Control: max-age=360000"}) @HTTP(method = "GET", path = "?app=weather.future&weaid=1&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json", hasBody = false) Call<WeatherBeans> requestWeatherBeansByHeaders(); @GET("login") Call<UserInfo> login(@Header("Authorization") String authorization); @HTTP(method = "POST", path = "?", hasBody = true) @FormUrlEncoded Call<WeatherBeans> requestWeatherBeansByHttpPost(@FieldMap Map<String, String> paramas); @GET("back_pic/03/70/72/5257b6c12d89875.jpg!r850/fw/{id}") Call<ResponseBody> getImage(@Path("id") int id); }
@Part
接口定義 /** * 上傳圖文 * @param description * @param file * @return */ @Multipart @POST("web/shrink") Call<ResponseBody> uploadFile(@Part("description") RequestBody description, @Part MultipartBody.Part file); /** * 上傳一張圖片 * @param file * @return */ @Multipart @POST("web/shrink") Call<ResponseBody> uploadFile(@Part() RequestBody file); /** * 上傳一張圖片 另外一種寫法 * @param file * @return */ @Multipart @POST() Call<ResponseBody> uploadFile(@Url String url, @Part() RequestBody file); /** * 上傳數量肯定的多張圖片 * @param description * @param img1 * @param img2 * @param img3 * @return */ @POST("web/shrink") Call<ResponseBody> uploadFiles(@Part("filename") String description, @Part("img\"; name=\"img1.png") RequestBody img1, @Part("img\"; name=\"img2.png") RequestBody img2, @Part("img\"; name=\"img3.png") RequestBody img3); /** * 上報數量不定的多張圖片 版本1 * @param params * @return */ @Multipart @POST("web/shrink") Call<ResponseBody> uploadFile(@PartMap Map<String, RequestBody> params); /** * 上報數量不定的多張圖片 版本2 * @param url * @param maps * @return */ @Multipart @POST() Call<ResponseBody> uploadFiles( @Url String url, @PartMap() Map<String, RequestBody> maps); 使用: private void doUpload() { Log.d("---------->", "doUpload"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://tinypng.com/") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); File file = getFile(); RequestBody requestBody = RequestBody.create(MediaType.parse("multipart/form-data"), file); // MultipartBody.Part 和服務端約定好Key,這裏的part name是用image MultipartBody.Part body = MultipartBody.Part.createFormData("image", file.getName(), requestBody); // 添加上傳文件描述 String descriptionString = "文件描述:這是一張照片"; RequestBody description = RequestBody.create(MediaType.parse("multipart/form-data"), descriptionString); Call<ResponseBody> call = netService.uploadFile(description, body); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { if (response.isSuccessful()) { try { ResponseBody responseBody = response.body(); Log.d("doUpload responseBody", responseBody.string()); } catch (IOException e) { e.printStackTrace(); } } else { Log.d("doUpload responseBody", "failed"); } } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { Log.d("doUpload responseBody", "onFailure"); } }); }
@Path
一、接口定義 @GET("back_pic/03/70/72/5257b6c12d89875.jpg!r850/fw/{id}") Call<ResponseBody> getImage(@Path("id") int id); 二、接口使用 private void doGetImage() { Log.d("#####step", "#doGetImage#"); Retrofit retrofit = new Retrofit.Builder() .baseUrl("http://bpic.588ku.com/") .addConverterFactory(GsonConverterFactory.create()) .build(); NetService netService = retrofit.create(NetService.class); Call<ResponseBody> call = netService.getImage(800); call.enqueue(new Callback<ResponseBody>() { @Override public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) { if (response.isSuccessful()) { Log.d("#####step", "#isSuccessful#"); } else { Log.d("#####step", "#Failure#"); } } @Override public void onFailure(Call<ResponseBody> call, Throwable t) { Log.d("#####step", "#onFailure#"); } }); } 三、結果打印 /#####step: #isSuccessful#
四、標記類
4.一、@FormUrlEncoded
主要是作表單提交,與@POST結合使用
4.二、@Multipart
主要是與@POST結合使用作文件的上傳
4.三、@Streaming
主要作大文件下載
@GET @Streaming Call<ResponseBody> downloadImage(@Url String url);