Retrofit下载文件

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Retrofit下载文件

第一步，请求接口

//下载图片@Streaming@GETCall<ResponseBody> downloadPicWithUrl(@Url String url);

第二步，请求网络

/** * 保存图片 * * @param baseUrl * @param urlpic */private void downFileWithPic(String baseUrl, final String urlpic, final int type) {    OkHttpClient builder = new OkHttpClient.Builder().build();    Retrofit retrofit = new Retrofit.Builder()            .baseUrl(baseUrl)            .client(builder)            .build();    final HttpPostService fileDownloadApi = retrofit.create(HttpPostService.class);    Observable.create(new Observable.OnSubscribe<String>() {        @Override        public void call(Subscriber<? super String> subscriber) {            try {                Response<ResponseBody> response = fileDownloadApi.downloadPicWithUrl(urlpic).execute();                if (response != null && response.isSuccessful()) {                    //文件总长度                    long fileSize = response.body().contentLength();                    long fileSizeDownloaded = 0;                    InputStream is = response.body().byteStream();                    if (AppUtil.isExitsSdcard()) {                        // 首先保存图片                        File file = Environment.getExternalStorageDirectory().getAbsoluteFile();//注意小米手机必须这样获得public绝对路径                        String fileName = "picture";                        File appDir = new File(file, fileName);                        if (!appDir.exists()) {                            appDir.mkdirs();                        }                        String filePicName = null;                        int indexOf = urlpic.lastIndexOf(".");                        String picName = urlpic.substring(0, indexOf);                       // LogUtil.e("picname"+picName);                        if (type == 1) {                            filePicName = picName + ".jpg";                        } else {                            filePicName = picName + ".gif";                        }                        File filePic = new File(appDir, filePicName);                        FileOutputStream fos = null;                        try {                            fos = new FileOutputStream(filePic);                            int count = 0;                            byte[] buffer = new byte[1024];                            while ((count = is.read(buffer)) != -1) {                                fos.write(buffer, 0, count);                                fileSizeDownloaded += count;                                // subscriber.onNext("file download: " + fileSizeDownloaded + " of " + fileSize);                            }                            fos.flush();                            fos.close();                            subscriber.onCompleted();                        } catch (Exception e) {                            e.printStackTrace();                        }                        // 最后通知图库更新                        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(new File(filePic.getAbsolutePath()))));                        ToastUtil.showSafeToast("保存成功");                    }                }            } catch (IOException e) {                e.printStackTrace();            }        }    })            .subscribeOn(Schedulers.io())            .subscribeOn(AndroidSchedulers.mainThread())            .subscribe(new Subscriber<String>() {                @Override                public void onCompleted() {                    Log.e("MainActivity", "文件下载完成");                }                @Override                public void onError(Throwable e) {                }                @Override                public void onNext(String s) {                    //Log.e("onNext", s);                }            });}

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