?Retrofit通過Url下載圖片

1.首先工具類：

/** * ClassName:DownloadImageUtils * Description TODO 下載圖片 * created by 漠天 * Data 2016/12/20 11:35 */ public class DownloadImageUtils {/** * 下載圖片到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) {}}); }/** * 保存下載的圖片流寫入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("圖片源錯誤"); 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：

/** * 下載最新模板圖片 * @param api */ public static Call<ResponseBody> downloadLatestFeature(AppServiceApi api, String imageUrl) {return api.downloadLatestFeature(imageUrl); }

3.Retrofit接口調用：（主要就是這部分，@Streaming 和 Call<ResponseBody>?）

/** * 下載最新模板 * * @return */ @Streaming @GET Call<ResponseBody> downloadLatestFeature(@Url String fileUrl);

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

我的demo DownloadImage

總結

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