android Retrofit下载图片

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Retrofit通过Url下载图片

1.首先工具类：

/** * ClassName:DownloadImageUtils * Description TODO 下载图片 * created by 漠天 * Data 2016/12/20 11:35 */public class DownloadImageUtils {    /**     * 下载图片到SD卡     * @param mApi     * @param url     * @param imageName     */    public static void downloadLatestFeature(AppServiceApi mApi, final String url, final String imageName){        Call<ResponseBody> resultCall = AppService.downloadLatestFeature(mApi,url);        resultCall.enqueue(new Callback<ResponseBody>() {            @Override            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {                writeResponseBodyToDisk(imageName,response.body());            }            @Override            public void onFailure(Call<ResponseBody> call, Throwable t) {            }        });    }    /**     * 保存下载的图片流写入SD卡文件     * @param imageName  xxx.jpg     * @param body  image stream     */    public static void writeResponseBodyToDisk(String imageName, ResponseBody body) {        if(body==null){            ToastUtils.showToast("图片源错误");            return;        }        try {            InputStream is = body.byteStream();            File fileDr = new File(APP_IMAGE_DIR);            if (!fileDr.exists()) {                fileDr.mkdir();            }            File file = new File(APP_IMAGE_DIR, imageName);            if (file.exists()) {                file.delete();                file = new File(APP_IMAGE_DIR, imageName );            }            FileOutputStream fos = new FileOutputStream(file);            BufferedInputStream bis = new BufferedInputStream(is);            byte[] buffer = new byte[1024];            int len;            while ((len = bis.read(buffer)) != -1) {                fos.write(buffer, 0, len);            }            fos.flush();            fos.close();            bis.close();            is.close();        } catch (IOException e) {            e.printStackTrace();        }    }}

2.接口方法：

/** * 下载最新模板图片 * @param api */public static Call<ResponseBody> downloadLatestFeature(AppServiceApi api, String imageUrl) {    return api.downloadLatestFeature(imageUrl);}

3.Retrofit接口调用：（主要就是这部分，@Streaming 和 Call<ResponseBody> ）

/** * 下载最新模板 * * @return */@Streaming@GETCall<ResponseBody> downloadLatestFeature(@Url String fileUrl);

from :　　http://blog.csdn.net/newsolider2012/article/details/54644762

我的demo DownloadImage

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