阿里云国际站：android阿里云oss

阿里云国际站提供了适用于 Android 的阿里云 OSS SDK，以下是如何在 Android 应用中集成和使用阿里云 OSS 的简要步骤：

1. 添加依赖

在 build.gradle 文件中添加阿里云 OSS 的依赖：

dependencies {
    implementation 'com.aliyun.dpa:oss-android-sdk:+'
}

2. 初始化 SDK

在应用程序启动时初始化 OSS：

import com.alibaba.sdk.android.oss.ClientConfiguration;
import com.alibaba.sdk.android.oss.OSS;
import com.alibaba.sdk.android.oss.OSSClient;
import com.alibaba.sdk.android.oss.common.auth.OSSAuthCredentialsProvider;
import com.alibaba.sdk.android.oss.common.auth.OSSFederationToken;
import com.alibaba.sdk.android.oss.common.auth.OSSCredentialProvider;

public class MyApplication extends Application {
    private static OSS oss;

    @Override
    public void onCreate() {
        super.onCreate();

        // 配置OSS客户端
        String endpoint = "http://oss-cn-hangzhou.aliyuncs.com";
        OSSCredentialProvider credentialProvider = new OSSAuthCredentialsProvider("Your_Auth_Server_URL");

        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); // 最大并发请求数，默认5个
        conf.setMaxErrorRetry(2); // 失败后最大重试次数，默认2次

        oss = new OSSClient(getApplicationContext(), endpoint, credentialProvider, conf);
    }

    public static OSS getOss() {
        return oss;
    }
}

3. 上传文件

创建上传任务：

import com.alibaba.sdk.android.oss.ClientException;
import com.alibaba.sdk.android.oss.OSS;
import com.alibaba.sdk.android.oss.ServiceException;
import com.alibaba.sdk.android.oss.callback.OSSCompletedCallback;
import com.alibaba.sdk.android.oss.common.utils.OSSLog;
import com.alibaba.sdk.android.oss.model.OSSRequest;
import com.alibaba.sdk.android.oss.model.OSSResult;
import com.alibaba.sdk.android.oss.model.PutObjectRequest;
import com.alibaba.sdk.android.oss.model.PutObjectResult;

public class UploadUtils {

    public void uploadFile(String bucketName, String objectKey, String uploadFilePath) {
        OSS oss = MyApplication.getOss();

        // 构造上传请求
        PutObjectRequest put = new PutObjectRequest(bucketName, objectKey, uploadFilePath);

        // 异步上传
        oss.asyncPutObject(put, new OSSCompletedCallback<PutObjectRequest, PutObjectResult>() {
            @Override
            public void onSuccess(PutObjectRequest request, PutObjectResult result) {
                OSSLog.logDebug("UploadSuccess");
                OSSLog.logDebug("ETag", result.getETag());
                OSSLog.logDebug("RequestId", result.getRequestId());
            }

            @Override
            public void onFailure(PutObjectRequest request, ClientException clientExcepion, ServiceException serviceException) {
                // 请求异常
                if (clientExcepion != null) {
                    // 本地异常如网络异常等
                    clientExcepion.printStackTrace();
                }
                if (serviceException != null) {
                    // 服务异常
                    OSSLog.logError("ErrorCode", serviceException.getErrorCode());
                    OSSLog.logError("RequestId", serviceException.getRequestId());
                    OSSLog.logError("HostId", serviceException.getHostId());
                    OSSLog.logError("RawMessage", serviceException.getRawMessage());
                }
            }
        });
    }
}

4. 下载文件

创建下载任务：

import com.alibaba.sdk.android.oss.ClientException;
import com.alibaba.sdk.android.oss.ServiceException;
import com.alibaba.sdk.android.oss.callback.OSSCompletedCallback;
import com.alibaba.sdk.android.oss.model.GetObjectRequest;
import com.alibaba.sdk.android.oss.model.GetObjectResult;

public class DownloadUtils {

    public void downloadFile(String bucketName, String objectKey, String downloadFilePath) {
        OSS oss = MyApplication.getOss();

        // 构造下载请求
        GetObjectRequest get = new GetObjectRequest(bucketName, objectKey);

        // 异步下载
        oss.asyncGetObject(get, new OSSCompletedCallback<GetObjectRequest, GetObjectResult>() {
            @Override
            public void onSuccess(GetObjectRequest request, GetObjectResult result) {
                // 下载成功
                InputStream inputStream = result.getObjectContent();
                byte[] buffer = new byte[2048];
                int len;
                File file = new File(downloadFilePath);
                try {
                    FileOutputStream outputStream = new FileOutputStream(file);
                    while ((len = inputStream.read(buffer)) != -1) {
                        outputStream.write(buffer, 0, len);
                    }
                    outputStream.close();
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

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

通过以上步骤，您可以在 Android 应用中集成和使用阿里云 OSS 服务，实现文件的上传和下载功能。请确保替换代码中的 Your_Auth_Server_URL 和其他配置信息为您实际的参数。