Retrofit 调用 微信api 生产小程序码

代码 如下

/**
 * 获取小程序 assesstoken
 *
 * @param grant_type
 * @param appid
 * @param secret
 * @return
 */
@POST("/cgi-bin/token")
Call<WeChatAssessTokenEntity> getAssessToken(@Query("grant_type") String grant_type,
                                             @Query("appid") String appid,
                                             @Query("secret") String secret);

@POST("/wxa/getwxacodeunlimit")
@Streaming
Call<ResponseBody> getWeChatImg(@Query("access_token") String access_token,
                                @Body RequestBody route);

 

调用代码

 

代码如下

@Override
public String saveAndShowImg(String transferId) {
    WeChatAssessTokenEntity weChatAssessTokenEntity;
    try {
        weChatAssessTokenEntity = tencentApi.getAssessToken(WeChatProgramImg.GRANT_TYPE,
                WeChatProgramImg.APIKEY, WeChatProgramImg.SECRETKEY).execute().body();
        if (weChatAssessTokenEntity != null) {

            //拼装 微信所需要的数据格式 普通的formdata 不可以必须是body
            Map<String, Object> map = new HashMap<>();
            map.put("scene", transferId);
            map.put("width", 430);
            map.put("auto_color", true);
            String json = new Gson().toJson(map);//要传递的json
            RequestBody body = RequestBody.create(okhttp3.MediaType.parse("application/json; charset=utf-8"), json);

            //从responsebody中读取图片
            Call<ResponseBody> responseBody = tencentApi.getWeChatImg(weChatAssessTokenEntity.getAccess_token(), body);
            String fileUrl = writeResponseBodyToDisk(responseBody.execute().body());

            DeclareTransfer declareTransfer = super.getOne(Condition.getQueryWrapper(new DeclareTransfer(){
                @Override
                public String getTransferId() {
                    return transferId;
                }
            }));

            declareTransfer.setTransferProgramPic(fileUrl);
            super.saveOrUpdate(declareTransfer);
            return fileUrl;
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

 

文件存储代码如下

/**
 * 根据retrofit 返回的ResponseBoby 取出里买的文件并存在本地
 *
 * @param body
 * @return
 */
private String writeResponseBodyToDisk(ResponseBody body) {
    String fileUrl = "";
    try {

        fileUrl = IdUtil.randomUUID() + ".png";
        File futureStudioIconFile = new File("/Users/file/" + fileUrl);

        InputStream inputStream = null;
        OutputStream outputStream = null;

        try {
            byte[] fileReader = new byte[4096];

            inputStream = body.byteStream();
            outputStream = new FileOutputStream(futureStudioIconFile);

            while (true) {
                int read = inputStream.read(fileReader);
                if (read == -1) {
                    break;
                }
                outputStream.write(fileReader, 0, read);
            }

            outputStream.flush();
            return fileUrl;
        } catch (IOException e) {
            return "";
        } finally {
            if (inputStream != null) {
                inputStream.close();
            }

            if (outputStream != null) {
                outputStream.close();
            }
        }
    } catch (IOException e) {
        return "";
    }
}