实现Android上的图片上传到服务器的最佳实践包含以下步骤：

1. 添加网络权限：确保在AndroidManifest.xml文件中添加了网络权限。

2. 创建一个用于上传图片的异步任务类（AsyncTask）：

public class UploadImageTask extends AsyncTask {
    
    private Context context;
    private ProgressDialog progressDialog;
    
    public UploadImageTask(Context context) {
        this.context = context;
    }
    
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        
        progressDialog = new ProgressDialog(context);
        progressDialog.setMessage("Uploading image...");
        progressDialog.setCancelable(false);
        progressDialog.show();
    }
    
    @Override
    protected String doInBackground(String... params) {
        String imagePath = params[0];
        
        try {
            URL url = new URL("http://your-server-url.com/upload");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setDoOutput(true);
            
            // 设置请求头
            connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=---------------------------1234567890");
            
            // 创建输出流
            OutputStream outputStream = connection.getOutputStream();
            PrintWriter writer = new PrintWriter(new OutputStreamWriter(outputStream, "UTF-8"), true);
            
            // 添加图片数据
            Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
            byte[] imageBytes = byteArrayOutputStream.toByteArray();
            
            writer.append("-----------------------------1234567890\r\n");
            writer.append("Content-Disposition: form-data; name=\"image\"; filename=\"image.jpg\"\r\n");
            writer.append("Content-Type: image/jpeg\r\n\r\n");
            writer.flush();
            
            outputStream.write(imageBytes);
            outputStream.flush();
            
            writer.append("\r\n");
            writer.append("-----------------------------1234567890--");
            writer.close();
            outputStream.close();
            
            // 获取服务器响应
            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                InputStream inputStream = connection.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                StringBuilder response = new StringBuilder();
                String line;
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
                reader.close();
                return response.toString();
            } else {
                return "Error: " + responseCode;
            }
        } catch (IOException e) {
            e.printStackTrace();
            return "Error: " + e.getMessage();
        }
    }
    
    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        
        progressDialog.dismiss();
        
        // 处理上传结果
        Toast.makeText(context, result, Toast.LENGTH_SHORT).show();
    }
}

3. 在Activity或Fragment中调用上传任务：

String imagePath = "/path/to/image.jpg"; // 替换为实际图片路径

UploadImageTask uploadImageTask = new UploadImageTask(this);
uploadImageTask.execute(imagePath);

请确保替换上述代码中的以下部分：

• "http://your-server-url.com/upload"：替换为实际的服务器上传接口URL。
• "/path/to/image.jpg"：替换为实际的图片路径。

这是一个基本的图片上传示例，可以根据自己的需求进行调整和扩展。