香港阿里云代理商：Android文件上传

1.在AndroidManifest.xml中添加以下权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2.在build.gradle中添加以下依赖：

implementation 'com.alibaba.cloud:aliyun-oss-android-sdk:3.0.4'
implementation 'com.alibaba.cloud:aliyun-oss-common-utils:3.0.4'

3.初始化OSSClient：

String accessKeyId = "your_accessKeyId";
String accessKeySecret = "your_access_key_secret";
String endpoint = "your_oss_endpoint";
String bucketName = "your_bucket_name";

// 创建OSSClient实例。
OSS oss = new OSSClient(getApplicationContext(), endpoint, new OSSCredentialProvider() {
    @Override
    public OSSCredential getCredentials() {
        OSSCredential ossCredential = new OSSPlainTextAKSKCredential(accessKeyId, accessKeySecret);
        return ossCredential;
    }
});

4.选择文件：

private static final int REQUEST_CODE = 0x01;

// 选择文件
public void selectFile(View view) {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    startActivityForResult(intent, REQUEST_CODE);
}

// 处理选择结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
        Uri uri = data.getData();
        String filePath = FileUtils.getPath(this, uri);
        Log.d("TAG", "filePath = " + filePath);
        
        // 开始上传文件
        uploadFile(filePath);
    }
}

5.上传文件：

// 上传文件
private void uploadFile(final String filePath) {
    // 构造上传请求
    PutObjectRequest put = new PutObjectRequest(bucketName, "test.jpg", filePath);

    // 异步上传
    OSSAsyncTask task = oss.asyncPutObject(put, new OSSCompletedCallback<PutObjectRequest, PutObjectResult>() {
        @Override
        public void onSuccess(PutObjectRequest request, PutObjectResult result) {
            Log.d("TAG", "文件上传成功");
            // TODO: 处理文件上传成功的回调
        }

        @Override
        public void onFailure(PutObjectRequest request, ClientException clientException, ServiceException serviceException) {
            Log.e("TAG", "文件上传失败");
            // TODO: 处理文件上传失败的回调
        }
    });
}

6.辅助类：

public class FileUtils {
    /**
     * 根据Uri返回文件绝对路径
     * @param context 上下文
     * @param uri 文件Uri
     */
    public static String getPath(final Context context, final Uri uri) {
        // DocumentProvider
        if (DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }
                final String selection = "_id=?";
                final String[] selectionArgs = new String[] {
                        split[1]
                };
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            // Return the remote address
            if (isGooglePhotosUri(uri))
                return uri.getLastPathSegment();
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
        return null;
    }

    /**
     * 获取文件Uri关联的数据列值
     * @param context 上下文
     * @param uri 文件Uri
     * @param selection 查询条件
     * @param selectionArgs 查询条件参数
     */
    public static String getDataColumn(Context context, Uri uri, String selection,
                                        String[] selectionArgs) {
        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

    /**
     * 判断Uri是否为ExternalStorageProvider
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * 判断Uri是否为DownloadsProvider
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * 判断Uri是否为MediaProvider
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * 判断Uri是否为Google Photos Uri
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }
}

您好，我是AI助手。关于Android文件上传，可以使用 HttpURLConnection 或者 OkHttp 等安卓原生网络请求库。以下是一个简单的上传文件的代码示例：

private void uploadFile(String url, File file) {
    try {
        String boundary = "---------------------------" + System.currentTimeMillis();
        URL uploadUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) uploadUrl.openConnection();
        conn.setRequestMethod("POST");
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setUseCaches(false);
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.setRequestProperty("Charset", "UTF-8");
        conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);

        DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
        dos.writeBytes("--" + boundary + "rn");
        dos.writeBytes("Content-Disposition: form-data; name="file"; filename="" + file.getName() + ""rn");
        dos.writeBytes("Content-Type: application/octet-streamrnrn");
        FileInputStream fis = new FileInputStream(file);
        byte[] buffer = new byte[1024];
        int len;
        while ((len = fis.read(buffer)) != -1) {
            dos.write(buffer, 0, len);
        }
        fis.close();
        dos.writeBytes("rn--" + boundary + "--rn");
        dos.flush();

        int responseCode = conn.getResponseCode();
        if (responseCode == 200) {
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String line;
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
            is.close();
        }
        dos.close();
        conn.disconnect();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

上述代码中，uploadFile 方法接受两个参数：上传服务器的 URL 和要上传的文件。在方法中，我们使用 HttpURLConnection 建立了一个 POST 请求，设置请求参数，读取文件的内容并写入到请求体中，最后等待响应。