retrofit之基本笔记

5.retrofit的基本用法：
public interface MovieService{
@GET("top250")
Call getTopMovie(@Query("start")int start,@Query("count") int count);
}
然后你还需要创建一个Retrofit对象：
public static final String baseUrl="https://api.douban.com/v2/movie/";
Retrofit retrofit=new Retrofit.Builder()
.baseUrl(baseUrl)
.addConverterFactory(GsonConverterFactory.create())
.build();

再用这个Retrofit对象创建一个MovieService对象：
MovieService movieService=retrofit.create(MovieService.class);
Call call=movieService.getTopMovie(0,10);
//call.enqueue()异步请求，call.execute()同步请求
call.enqueue(new Callback(){
@Override
public void onResponse(Call call, Response response) {
result_TV.setText(response.body().toString());
}
@Override
public void onFailure(Call call, Throwable t) {
result_TV.setText(t.getMessage());
}
});
在这边还可以移除一个请求：
Retrofit 1.x版本没有直接取消正在进行中任务的方法的，在2.x的版本中，Service的模式变成Call的形式的原因是为了让正在进行的事务可以被取消。
要做到这点，只需要调用call.cancel()。
以上就是Retrofit2.0的基本用法了，下面讲讲它的详细用法：

4.项目中的retrofit的使用情况（基本流程 和 文件和图片上传记录）？

4.1项目中retrofit的使用流程：
public interface CommonApi {
@POST("common/getTime.htm")
Observable<BaseJson> getNetTime(@Body RequestBody requestBody);
}

public class UsualConfigModel extends BaseModel implements UsualConfigContract.Model {
    @Override
    public Observable<BaseJson<Long>> getNetTime(Map<String, Object> hashMap) {
        Observable<BaseJson<Long>> observable = mRepositoryManager.obtainRetrofitService(CommonApi.class)
                .getNetTime(ToRequestBodyUtil.toRequestBody(hashMap));
        return observable;
    }
}

public static RequestBody toRequestBody(Map<String, Object> map) {
String input = buildParams(map);
input = replaceURL(input);
//RequestBody requestBody = RequestBody.create(MediaType.parse("application/json, text/plain; charset=utf-8"), input);
RequestBody requestBody = RequestBody.create(MediaType.parse("application/x-www-form-urlencoded; charset=utf-8"), input);
return requestBody;
}

public static RequestBody buildParamV2(Map<String, String> paramsMap, boolean isFilter) {
FormBody.Builder builder = new FormBody.Builder();
for (String key : paramsMap.keySet()) {
String value = paramsMap.get(key);
builder.add(key, value);// 追加表单信息
}
RequestBody formBody = builder.build();
//Request request = new Request.Builder().url(netUrl).post(formBody).build();
return formBody;
}

4.2. 项目中retrofit的文件(和图片)上传使用流程：
VisitApi的类：
/**
* @des: 会议详情--新增 :files 文件,图片上传等 : ("", param, files).then( ());
// 采用这种方式：
*/
@POST("record/meeting/saveRecordMeetingInfo.htm")
Observable newAddMeetDetail(@Body RequestBody body);

 @Multipart
@POST("record/meeting/saveRecordMeetingInfo.htm")
Observable<BaseCode> newAddMeetDetailV1(@QueryMap Map<String, Object> usermaps, @Part List<MultipartBody.Part>fileMap,
                                        @Part List<MultipartBody.Part>photoMap, @Part List<MultipartBody.Part> signMap);

@Multipart
@POST("record/meeting/saveRecordMeetingInfo.htm")
Observable<BaseCode> newAddMeetDetailV2(@QueryMap Map<String, Object> usermaps,    @PartMap Map<String, RequestBody>fileMap,
                                        @PartMap Map<String, RequestBody>photoMap, @PartMap Map<String, RequestBody> signMap);

/**
* @des: 会议修改的接口
/
@Override
public Observable changedMeetDetail(Map<String, Object> hashMap, List filePaths, List photoPaths, List signPaths) {
MultipartBody.Builder build = new MultipartBody.Builder();
for (Map.Entry<String, Object> entry : hashMap.entrySet()) {
String key = entry.getKey();
Object value = entry.getValue();
build.addFormDataPart(key, String.valueOf(value));//
}
if (filePaths != null && filePaths.size() > 0) {
for (int i = 0; i < filePaths.size(); i++) {
File file = new File(filePaths.get(i));
RequestBody fileRQ = RequestBody.create(MediaType.parse("multipart/form-data"), file);
build.addFormDataPart("files", file.getName(), fileRQ);//
}
}
if (photoPaths != null && photoPaths.size() > 0) {
for (int i = 0; i < photoPaths.size(); i++) {
File file = new File(photoPaths.get(i));
RequestBody fileRQ = RequestBody.create(MediaType.parse("image/"), file);
build.addFormDataPart("photos", file.getName(), fileRQ);
}
}
MultipartBody body=build.build(); //MultipartBody继承RequestBody
Observable observable = mRepositoryManager.obtainRetrofitService(VisitApi.class)
.changedMeetDetail(body);
return observable;
}

// 不适合的方法：
public Observable changedMeetDetail2(Map<String, Object> hashMap, List filePaths, List photoPaths, List signPaths) {
List<MultipartBody.Part> parts1=new ArrayList<>();
if (filePaths != null && filePaths.size() > 0) {
for (int i = 0; i < filePaths.size(); i++) {
File file = new File(filePaths.get(i));
RequestBody fileRQ = RequestBody.create(MediaType.parse("multipart/form-data"), file);
MultipartBody.Part part = MultipartBody.Part.createFormData("files", file.getName(), fileRQ);
parts1.add(part);
}
}else {
MultipartBody.Part part = MultipartBody.Part.createFormData("","");//直接传入两个空字符串就可以了...不能传null;
parts1.add(part);
}

    List<MultipartBody.Part> parts2=new ArrayList<>();
    if (photoPaths != null && photoPaths.size() > 0) {
        for (int i = 0; i < photoPaths.size(); i++) {
            File file = new File(photoPaths.get(i));
            RequestBody fileRQ = RequestBody.create(MediaType.parse("image/*"), file);
            MultipartBody.Part part = MultipartBody.Part.createFormData("photos", file.getName(), fileRQ);
            parts2.add(part);
        }
    }else {
        MultipartBody.Part part = MultipartBody.Part.createFormData("","");//直接传入两个空字符串就可以了...不能传null;
        parts2.add(part);
    }
    Observable<BaseCode> observable = null;

// Observable observable= mRepositoryManager.obtainRetrofitService(VisitApi.class)
// .changedMeetDetail(hashMap, parts1, parts2, parts3);
return observable;
}