Android OSS下载文件

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最新推荐文章于 2025-03-16 16:25:00 发布

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本文链接：https://blog.youkuaiyun.com/Kstar_Ming/article/details/115522021

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本文介绍如何在Android应用中使用阿里云OSS下载文件，涉及依赖安装、Config配置、OSS初始化和下载操作的详细步骤，以及处理可能遇到的错误和进度跟踪。

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近期，公司要求使用OSS下载文件，优化下载模块
首先，想要使用OSS，必须下载其相关依赖

    implementation 'com.aliyun.dpa:oss-android-sdk:2.9.5'
   // implementation project(':oss-android-sdk')

依赖下载成功后，需要配置Config文件（提高安全性，使用STS方式）

public class Config {

    // 访问的endpoint地址
    public static final String OSS_ENDPOINT = "后台获取的end_point地址";
    //callback 测试地址
    public static final String OSS_CALLBACK_URL = "上传的callback";
   
    public static final String STS_SERVER_URL = "后台获取STS地址";//STS 地址

    public static final String BUCKET_NAME = "后台提供的Bucket_name";
    public static final String OSS_ACCESS_KEY_ID = "后台提供的AccessKeyID";
    public static final String OSS_ACCESS_KEY_SECRET = "后台提供的AccessKeySecret";

    public static final int DOWNLOAD_SUC = 1;
    public static final int DOWNLOAD_Fail = 2;
    public static final int UPLOAD_SUC = 3;
    public static final int UPLOAD_Fail = 4;
    public static final int UPLOAD_PROGRESS = 5;
    public static final int LIST_SUC = 6;
    public static final int HEAD_SUC = 7;
    public static final int RESUMABLE_SUC = 8;
    public static final int SIGN_SUC = 9;
    public static final int BUCKET_SUC = 10;
    public static final int GET_STS_SUC = 11;
    public static final int MULTIPART_SUC = 12;
    public static final int STS_TOKEN_SUC = 13;
    public static final int FAIL = 9999;
    public static final int REQUESTCODE_AUTH = 10111;
    public static final int REQUESTCODE_LOCALPHOTOS = 10112;
    public static final int REQUESTCODE_OPEN_DOCUMENT = 10113;
}

在我们配置好Config文件后，就可以初始化OSS了：

 OSSCredentialProvider credentialProvider;
        //使用自己的获取STSToken的类
       	credentialProvider = new OSSAuthCredentialsProvider(Config.STS_SERVER_URL);
       	editBucketName = Config.BUCKET_NAME;
        ClientConfiguration conf = new ClientConfiguration();
        conf.setConnectionTimeout(15 * 1000); // 连接超时，默认15秒
        conf.setSocketTimeout(15 * 1000); // socket超时，默认15秒
        conf.setMaxConcurrentRequest(5); // 最大并发请求书，默认5个
        conf.setMaxErrorRetry(2); // 失败后最大重试次数，默认2次
        OSS oss = new OSSClient(getApplicationContext(), endpoint, credentialProvider, conf);
        OSSLog.enableLog();		//开启Log打印
        return new OssService(oss, editBucketName, displayer);

初始化完成后，就可以进行下载啦：

		GetObjectRequest get = new GetObjectRequest(Config.BUCKET_NAME, 下载的文件路径);
		//此处为设置进度条，如不需要可以删除
        get.setProgressListener(new OSSProgressCallback<GetObjectRequest>() {
            @Override
            public void onProgress(GetObjectRequest request, long currentSize, long totalSize) {
                Log.d("GetObject", "currentSize: " + currentSize + " totalSize: " + totalSize);
                int progress = (int) (100 * currentSize / totalSize);
                mDisplayer.updateProgress(progress);
                mDisplayer.displayInfo("下载进度: " + String.valueOf(progress) + "%");
            }
        });
        OSSLog.logDebug("asyncGetObject");
        // 此处下载任务
        OSSAsyncTask task = mOss.asyncGetObject(get, new OSSCompletedCallback<GetObjectRequest, GetObjectResult>() {
            @Override
            public void onSuccess(GetObjectRequest request, GetObjectResult result) {
                // 请求成功
                InputStream inputStream = result.getObjectContent();
                //Bitmap bm = BitmapFactory.decodeStream(inputStream);
                try {
                    //需要根据对应的View大小来自适应缩放
                    Bitmap bm = mDisplayer.autoResizeFromStream(inputStream);
                    long get_end = System.currentTimeMillis();
                    OSSLog.logDebug("get cost: " + (get_end - get_start) / 1000f);
                    mDisplayer.downloadComplete(bm);
                    mDisplayer.displayInfo("Bucket: " + mBucket + "\nObject: " + request.getObjectKey() + "\nRequestId: " + result.getRequestId());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(GetObjectRequest request, ClientException clientExcepion, ServiceException serviceException) {
                String info = "";
                // 请求异常
                if (clientExcepion != null) {
                    // 本地异常如网络异常等
                    clientExcepion.printStackTrace();
                    info = clientExcepion.toString();
                }
                if (serviceException != null) {
                    // 服务异常
                    Log.e("ErrorCode", serviceException.getErrorCode());
                    Log.e("RequestId", serviceException.getRequestId());
                    Log.e("HostId", serviceException.getHostId());
                    Log.e("RawMessage", serviceException.getRawMessage());
                    info = serviceException.toString();
                }
                mDisplayer.downloadFail(info);
                mDisplayer.displayInfo(info);
            }
        });